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epcos-ferrites-and-accessories-html.html
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1

04/13

Ferrites and accessories

SIFERRIT materials

33

General – Definitions

121

Application notes

141

Processing notes

169

RM cores

201

PQ cores

269

PM cores

288

EP, EPX, EPO cores

303

P cores

335

P core halves for proximity switches (incl. PS cores)

387

Packing

183

Quality and environment

192

Standards and specifications

199

U and UI cores

553

Toroids (ring cores), Double-aperture cores

561, 603

Ferrite polymer composites

605

ER cores

509

ETD cores

517

Cautions and warnings

609

Symbols and terms, Subject index

611, 617

Get in Contact

620

E cores

399

ELP cores

456

EQ cores, ER planar cores

488, 497

Important notes

2

Contents

3

Selector guide, Index of part numbers

10, 26

EFD cores

539

EV cores

550

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2

04/13

The following applies to all products named in this publication:

1. Some parts of this publication contain 

statements about the suitability of our products for 

certain areas of application

. These statements are based on our knowledge of typical re- 

quirements that are often placed on our products in the areas of application concerned. We 
nevertheless expressly point out 

that such statements cannot be regarded as binding 

statements about the suitability of our products for a particular customer application

.

As a rule, EPCOS is either unfamiliar with individual customer applications or less familiar 
with them than the customers themselves. For these reasons, it is always ultimately incum-
bent on the customer to check and decide whether an EPCOS product with the properties de- 
scribed in the product specification is suitable for use in a particular customer application.

2. We also point out that 

in individual cases, a malfunction of electronic components or 

failure before the end of their usual service life cannot be completely ruled out in the 
current state of the art, even if they are operated as specified

. In customer applications 

requiring a very high level of operational safety and especially in customer applications in
which the malfunction or failure of an electronic component could endanger human life or 
health (e.g. in accident prevention or lifesaving systems), it must therefore be ensured by 
means of suitable design of the customer application or other action taken by the customer 
(e.g. installation of protective circuitry or redundancy) that no injury or damage is sustained by 
third parties in the event of malfunction or failure of an electronic component.

3.

The warnings, cautions and product-specific notes must be observed.

4. In order to satisfy certain technical requirements, 

some of the products described in this 

publication may contain substances subject to restrictions in certain jurisdictions (e.g. 
because they are classed as hazardous)

. Useful information on this will be found in our Ma- 

terial Data Sheets on the Internet (www.epcos.com/material). Should you have any more de- 
tailed questions, please contact our sales offices.

5. We constantly strive to improve our products. Consequently, 

the products described in this 

publication may change from time to time

. The same is true of the corresponding product 

specifications. Please check therefore to what extent product descriptions and specifications 
contained in this publication are still applicable before or when you place an order. We also 

reserve the right to discontinue production and delivery of products

. Consequently, we 

cannot guarantee that all products named in this publication will always be available. The 
aforementioned does not apply in the case of individual agreements deviating from the fore- 
going for customer-specific products.

6. Unless otherwise agreed in individual contracts, 

all orders are subject to the current version 

of the "General Terms of Delivery for Products and Services in the Electrical Industry" 
published  by  the  German  Electrical  and  Electronics  Industry  Association (ZVEI)

.

7. The trade names EPCOS, BAOKE, Alu-X, CeraDiode, CeraLink, CSMP, CSSP, CTVS, 

DeltaCap, DigiSiMic, DSSP, FilterCap, FormFit, MiniBlue, MiniCell, MKD, MKK, MLSC, 
MotorCap, PCC, PhaseCap, PhaseCube, PhaseMod, PhiCap, SIFERRIT, SIFI, SIKOREL, 
SilverCap,  SIMDAD,  SiMic,  SIMID,  SineFormer,  SIOV,  SIP5D,  SIP5K,  ThermoFuse, 
WindCap are 

trademarks registered or pending 

in Europe and in other countries. Further 

information will be found on the Internet at www.epcos.com/trademarks.

Important notes

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04/13

Page

Contents

Selector guide 

10

RM cores 

10

PQ cores 

12

PM cores 

13

EP cores 

14

P cores (pot cores) 

15

P core halves and PS cores 

17

E cores 

18

ELP cores 

20

EQ cores 

21

ER planar cores 

22

ER cores 

22

ETD cores 

23

EFD, EV cores 

24

U, UI cores 

25

Toroids (ring cores) 

25

Double-aperture cores 

25

FPC film 

25

Index of part numbers 

26

SIFERRIT materials 

33

1

Material application survey   

34

2

Material properties 

35

3

Measuring conditions

45

4

Specific material data

46

DC magnetic bias 

46

Relative loss factor versus frequency

(inductors for resonant circuits and line attenuation) 

47

Relative inductance component versus frequency 

(broadband transformers)

 48

Performance factor versus frequency

 (power transformers)

49

Standardized hysteresis material constant versus temperature     

50

Normalized impedance

50

Specific data for K1

52

Specific data for 

K8

54

Specific data for 

K10

55

Specific data for 

M13

56

Specific data for 

M33

57

Specific data for 

N22

59

Specific data for 

N27

60

Specific data for 

N30

63

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Contents

Specific data for N41

65

Specific data for 

N45

68

Specific data for 

N48

70

Specific data for 

N49

72

Specific data for 

N51

75

Specific data for 

N72

78

Specific data for 

N87

81

Specific data for 

N88

84

Specific data for 

N92

88

Specific data for 

N95

91

Specific data for 

N96

94

Specific data for 

N97

97

Specific data for 

PC47

100

Specific data for 

T35

103

Specific data for 

T36

105

Specific data for 

T37

107

Specific data for 

T38

109

Specific data for 

T46

111

Specific data for 

T57

113

Specific data for 

T65

115

Specific data for 

T66

117

5

Plastic materials, manufacturers and UL numbers

119

General – Definitions 

121

1

Hysteresis

121

1.1

Hysteresis loop 

121

1.2

Basic parameters of the hysteresis loop

122

1.2.1

Initial magnetization curve

122

1.2.2

Saturation magnetization 

B

S

122

1.2.3

Remanent flux density 

B

R

(H)

122

1.2.4

Coercive field strength 

H

C

122

2

Permeability

123

2.1

Initial permeability 

P

i

 123

2.2

Effective permeability 

P

e

123

2.3

Apparent permeability 

P

app

 124

2.4

Complex permeability 

P

124

2.5

Reversible permeability 

P

rev

 125

2.6

Amplitude permeability 

P

a

,

A

L1

 value

126

3

Magnetic core shape characteristics

127

3.1

Form factor 

127

3.2

Inductance factor, A

L

 value 

127

3.3

Tolerance code letters

128

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4

Definition quantities in the small-signal range

129

4.1

Loss factor tan  

G

129

4.2

Relative loss factor tan  

G

/

P

i

129

4.3

Quality factor 

Q

130

4.4

Hysteresis loss resistance 

R

h

 and hysteresis material constant 

K

B

130

5

Definition quantities in the high-excitation range

131

5.1

Core losses 

P

V

131

5.2

Performance factor (

PF

 = 

f

 · 

B

max

)

132

6

Influence of temperature

133

6.1

P

(

T

) curve, Curie temperature 

T

C

133

6.2

Temperature coefficient of permeability 

D

133

6.3

Relative temperature coefficient 

D

 F

 133

6.4

Permeability factor

134

6.5

Effective temperature coefficient 

D

 e

 134

6.6

Relationship between the change in inductance and the permeability factor

134

6.7

Temperature dependence of saturation magnetization

134

6.8

Temperature dependence of saturation-dependent permeability

(amplitude permeability)

134

7

Disaccommodation

135

7.1

Disaccommodation coefficient 

d

135

7.2

Disaccommodation factor 

DF

135

8

General mechanical, thermal, electrical and magnetic properties of ferrites

136

8.1

Mechanical properties

136

8.2

Stress sensitivity of magnetic properties

137

8.3

Magnetostriction

138

8.4

Resistance to radiation

138

8.5

Resistivity 

U

, dielectric constant 

H

138

9

Coil characteristics

140

Application notes 

141

1

Cores for filter applications

141

1.1

Gapped cores for filter/resonant circuits 

141

1.2

P and RM cores with threaded sleeves

142

1.3

Typical calculation of a resonant circuit inductor

142

2

Cores for broadband transformers 

144

2.1

Precision-ground, ungapped cores for broadband transformers

144

2.2

Fundamentals for broadband transformers

in the range 10 kHz to over 1 GHz – an example

144

2.3

Low-distortion transformers for digital data transmission (ISDN, xDSL)

145

3

Cores for LAN applications

148

3.1

Signal transformers

148

3.2

Common-mode chokes

149

3.3

Coating to ensure highest insulation resistance

149

4

Cores for EMI applications

150

4.1

Ring cores to suppress line interference

150

4.2

Common-mode chokes

151

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4.3

NiZn ferrites

151

4.4

MnZn ferrites

152

5

Cores for inductive sensors

153

6

Cores for power applications

154

6.1

Core shapes and materials

154

6.2

Low-profile cores for planar magnetics

154

6.3

Correlation: Applications – core shape/material

155

6.3.1

Step-down converters 

155

6.3.2

Single-ended flyback converter

156

6.3.3

Single-ended forward converter

157

6.3.4

Push-pull converter 

158

6.3.5

Electronic lamp ballast device 

159

6.4

Selection of switch-mode power supply transformer cores

160

6.5

Selection tables: Power capacities

160

6.6

Thermal resistance for the main power transformer core shapes

168

Processing notes   

169

1

Gapped and ungapped ferrite cores

169

2

Processing notes for the manufacture of wound products

for small-signal and power applications

170

2.1

Winding design

170

RM cores 

171

PQ cores

172

PM cores 

173

EP cores 

174

P cores 

175

EFD cores 

176

ETD and ER cores 

177

E cores 

178

SMD types 

179

2.2

Soldering/Inductor assembly

180

2.3

Design and processing information for SMD components

180

2.3.1

Automatic placement

180

2.3.2

Coplanarity

180

2.3.3

Solder paste application

181

2.4

Adhesive application and core mating

181

2.5

Holding jigs

182

2.6

Final adjustment

182

2.7

Hole arrangement

182

2.8

Creepage and clearance

182

Packing

183

Survey of packing modes 

183

1

General information

184

1.1

Packing unit (PU)

184

1.2

Dispatch unit

184

1.3

Barcode label

184

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Contents

2

Modes of packing

185

2.1

Blister tape

185

2.2

Tray (pallet)

185

2.2.1

Standard tray

185

2.2.2

Block packing

185

2.3

Container

186

2.3.1

Bag

186

2.3.2

Boxes

186

2.4

Packing for coil formers

186

2.5

Cardboard tray 

186

3

Delivery modes for automatic processing

187

3.1

General information on inductor production

187

3.2

Cores in blister tape (strips)

187

3.3

Cores in blister tape (reeled)

189

3.4

Blister tapes 

189

3.5

Dispenser pack   

190

3.6

Skin packing

191

Quality and environment 

192

1

EPCOS quality system

192

1.1

Extract from EPCOS quality policy

192

1.2

Quality management system

192

1.3

Certification

192

1.4

Production sequence and quality assurance

192

1.5

Delivery quality

194

1.6

Failure criteria

194

1.7

Incoming goods inspection at the customer

194

1.8

Final inspection/approval for shipment

194

1.9

Reliability

194

1.10

Traceability

194

1.11

Electrical properties

194

1.12

Dimensions

194

1.13

Finish

195

1.14

AQL values

195

1.15

Barcode label

195

1.16

Conditions of use

196

1.17

Customer complaints

196

2

Environmental management system

197

2.1

Environmental policy

197

2.2

Environmental management system

197

2.3

Certification

197

2.4

RoHS

197

2.5

REACH

198

2.6

Banned and hazardous substances in components

198

2.7

Material data sheets for product families

198

2.8

Disposal

198

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Contents

Standards and specifications 

199

1

IEC standards

199

1.1

Quality assessment

200

RM cores   

201

General information

201

RM 4 through RM 14

203

PQ cores   

269

General information

269

PQ 16/11.6 through PQ 50/50

270

PM cores   

288

General information

288

1

Core losses

289

2

Tightening torque

289

PM 50/39 through PM 114/39

290

EP, EPX, EPO cores   

303

General information

303

EP 5 through EP 20

305

P cores   

335

General information

335

P 3.3 

u

 2.6 through P 41 

u

 25

336

P core halves for proximity switches (incl. PS cores)     

387

General information

387

PS 7.35 

u

 3.6 through P core half 150 

u

 30

388

E cores   

399

General information

399

E 5 through E 80/38/20

404

ELP cores   

456

General information

456

ELP 14/3.5/5 through ELP 64/10/50

457

EQ cores   

488

General information

488

EQ 13 through EQ 30

489

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Contents

ER planar cores   

497

General information

497

ER 9.5/5 through ER 32

498

ER cores   

509

General information

509

ER 28, ER 35 through ER 54

510

ETD cores   

517

General information

517

ETD 29/16/10 through ETD 59/31/22

518

EFD cores   

539

General information

539

EFD 10/5/3 through EFD 30/15/9

540

EV cores   

550

EV 15/9/7 through EV 30/16/3

550

U and UI cores   

553

General information

553

U 93/76/16 through U 141/78/30

554

Toroids (ring cores)     

561

General information

561

Overview

563

R 2.5 through R 202

565

Toroids (ring cores) accessories   

593

General information

593

Base plate for ring cores

595

Double aperture cores   

603

Ferrite polymer composites   

605

General information

605

C350, C351

606

Cautions and warnings

609

Symbols and terms 

611

Ordering code structure

614

Versions (code letters) of RM, P and E cores

615

Subject index 

617

Get in Contact 

620

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04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

RM cores

Core type

Standards

Mounting

dimensions (mm)

of assembly set

Base area

u

H

 1)

Individual parts

of assembly set

Part

number

Page

RM 4

IEC 62317-4

Core

B65803

204

10.16

2

u

 10.8

Coil former

B65804

206

Clamp

B65806

207

Adjusting screws

B65539/

B65806

208

RM 4 LP

IEC 62317-4

Core

B65803

209

Clamp

B65804

210

Insulating washers

B65804

210

14 

u

 17.5 

u

 8.1

Coil former/Clamp

B65804

211

RM 5

IEC 62317-4

Core

B65805

213

12.7

2

u

 10.8

Coil former

B65806

215

Clamp

B65806

216

Insulating washers

B65806

216

16.5 

u

 19

u

 10.6

Coil former

B65822

217, 218

Clamp

B65806

217, 218

Adjusting screws

B65539/

B65806

219

RM 5 LP

IEC 62317-4 20 

u

 16 

u

 

8

Core

B65805

220

RM 6

IEC 62317-4

Core

B65807

222

15.24

2

u

 12.8

Coil former

B65808

224, 225

Coil former for SMPS transf.

B65808

226

19.5 

u

 25 

u

 12.8

Coil former for power appl.

B65808

227

Clamp/Insulating washers

B65808

228

19.6 

u

 22.2 

u

 13

Coil former

B65821

229

Clamp

B65808

229

Adjusting screws

B65659

230

RM 6 LP

IEC 62317-4

Core

B65807

231

1) Height above mounting plane

Selector guide

Selector guide

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04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

RM cores

 (continued)

Core type

Standards

Mounting

dimensions (mm)

of assembly set

Base area

u

H

 1)

Individual parts

of assembly set

Part

number

Page

RM 7

IEC 62317-4

Core

B65819

233

17.78

2

u

 13.8

Coil former

B65820

234

Clamp/Insulating washers

B65820

235

Adjusting screws

B65659

236

RM 7 LP

IEC 62317-4

Core

B65819

237

RM 8

IEC 62317-4

Core

B65811

239

20.32

2

u

 16.8

Coil former

B65812

241, 242

Coil former for SMPS transf.

B65812

243

26 

u

 30

u

 16.8

Coil former for power appl.

B65812

244

Clamp/Insulating washers

B65812

245

Adjusting screw

B65812

246

RM 8 LP

IEC 62317-4

Core

B65811

247

Clamp/Insulating washers

B65812

248

RM 10

IEC 62317-4

Core

B65813

250

25.4

2

u

 19

Coil former

B65814

252

31 

u

 40 

u

 19

Coil former for power appl.

B65814

253

Clamp/Insulating washers

B65814

254

Adjusting screws

B65679

255

RM 10 LP

IEC 62317-4

Core

B65813

256

RM 12

IEC 62317-4

Core

B65815

258

30.48

2

u

 24.9

Coil former

B65816

259

32 

u

 45.7 

u

 24.9

Coil former for power appl.

B65816

260

Clamp

B65816

261

RM 12 LP

IEC 62317-4

Core

B65815

262

RM 14

IEC 62317-4

Core

B65887

264

35.56

2

u

 30.5

Coil former

B65888

265

44 

u

 29 

u

 30.5

Coil former for power appl.

B65888

266

Clamp/Insulating washer

B65888

267

RM 14 LP

IEC 62317-4

Core

B65887

268

1) Height above mounting plane

Selector guide

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04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

PQ cores

Core type

Standards

Mounting

dimensions (mm)

of assembly set

Base area

u

H

 1)

Individual parts

of assembly set

Part

number

Page

PQ 16/11.6

IEC 62317-13

Core

B65885A

270

PQ 20/16

IEC 62317-13

Core

B65875B

271

PQ 20/20

IEC 62317-13

Core

B65875A

272

PQ 26/20

IEC 62317-13

Core

B65877B

273

27 

u

 30

u

 25.2

Coil former

B65878E

274

PQ 26/25

IEC 62317-13

Core

B65877A

275

27 

u

 30 

u

 29.3

Coil former

B65878E

276

PQ 32/20

IEC 62317-13

Core

B65879A

277

32.3 

u

 34.3 

u

 20.2

Coil former

B65880E

278

PQ 32/30

IEC 62317-13

Core

B65879B

279

33.2 

u

 34.7 

u

 33.1

Coil former

B65880E

280

PQ 35/35

IEC 62317-13

Core

B65881A

281

PQ 40/30

IEC 62317-13

Core

B65883B

282

PQ 40/40

IEC 62317-13

Core

B65883A

283

40.3 

u

 42.3 

u

 45.3

Coil former

B65884E

284

PQ 50/40

IEC 62317-13

Core

B65981B

285

PQ 50/50

IEC 62317-13

Core

B65981A

286

51.3 

u

 51.9 

u

 52.5

Coil former

B65982E

287

1) Height above mounting plane

Selector guide

epcos-ferrites-and-accessories-html.html
background image

13

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

PM cores

Core type

Standards

Mounting

dimensions (mm)

of assembly set

Base area

u

H

 1)

Individual parts

of assembly set

Part

number

Page

PM 50/39

IEC 61247

Core

B65646

290

65 

u

 52

u

 45

Coil former

B65647

291

Mounting assembly

B65647

292

PM 62/49

IEC 61247

Core

B65684

293

76 

u

 64 

u

 55

Coil former

B65685

294

Mounting assembly

B65685

295

PM 74/59

IEC 61247

Core

B65686

296

85.5 

u

 75 

u

 65

Coil former

B65687

297

Mounting assembly

B65687

298

PM 87/70

IEC 61247

Core

B65713

299

101 

u

 87 

u

 72

Coil former

B65714

300

PM 114/93 IEC 61247

Core

B65733

301

114 

u

 92 

u

 93

Coil former

B65734

302

1) Height above mounting plane

Selector guide

epcos-ferrites-and-accessories-html.html
background image

14

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

EP cores

Core type

Standards

Mounting

dimensions (mm)

of assembly set

Base area

u

H

 1)

Individual parts

of assembly set

Part

number

Page

EP 5

Core

B65855A

305

EP 6

Core

B65855B

306

EP 7

IEC 61596

Core

B65839

307

7.5 

u

 10

u

 10

Coil former/Cap yoke

B65840

309

13 

u

 9.2 

u

 8.8

Coil former

B65840

310

EPX 7/9

Core

B65857A

311

12.6 

u

 9.4 

u

 12.4

Coil former

B65858

313

EPX 9/9

Core

B65857C

314

EP 10

IEC 61596

Core

B65841

316

12 

u

 14.2 

u

 12.5

Coil former

B65842

318

Mounting assembly

B65842

319

EPX 10

Core

B65859

320

EP 13

IEC 61596

Core

B65843A

321

15 

u

 16

u

 13.7

Coil former

B65844

323

15 

u

 16 

u

 13.7

Coil former for high-voltage 
applications

B65844

324

Mounting assembly

B65844

325

EPO 13

Core

B65843P

326

15 

u

 16 

u

 13.7

Coil former

B65844

327

15 

u

 16 

u

 13.7

Coil former for high-voltage 
applications

B65844

328

EP 17

IEC 61596

Core

B65845

329

20 

u

 21.6 

u

 16.2

Coil former

B65846

330

Mounting assembly

B65846

331

EP 20

IEC 61596

Core

B65847

332

23 

u

 27.5 

u

 20.5

Coil former

B65848

333

Mounting assembly

B65848

334

1) Height above mounting plane

Selector guide

epcos-ferrites-and-accessories-html.html
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15

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

P cores (pot cores)

Core type

Standards

Mounting

dimensions (mm)

of assembly set

Base area

u

H

1)

Individual parts

of assembly set

Part

number

Page

P 3.3 

u

 2.6 IEC 62323

Core

B65491

336

P 4.6 

u

 4.1

Core

B65495

337

P 5.8 

u

 3.3 IEC 62323

Core

B65501

338

P 7 

u

 4

Core

B65511

340

7.5 

u

 7.5 

u

 7.1

Coil former

B65512

341

Mounting assembly

B65512

342

P 9 

u

 5

IEC 60133

Core

B65517

344

9.9 

u

 9.9 

u

 8.3

(4 solder terminals)

Coil former

B65522

345

9.9 

u

 12.3 

u

 8.3

(6 solder terminals)

12.2 

u

 17 

u

 6.0

Coil former

B65524

346

Mounting assembly

B65518

347

P 11 

u

 7

IEC 60133

Core

B65531

349

Coil former

B65532

350

12.3 

u

 12.3 

u

 9.5

(4 solder terminals)

Mounting assembly

B65535

351

12.3 

u

 14.6 

u

 9.5

(8 solder terminals)

Adjusting screws

B65539

B65806

352

P 14 

u

 8

IEC 60133

Core

B65541

354

16.8 

u

 15 

u

 11.3

(4 solder terminals)

Coil former

B65542

355

16.8 

u

 19.6 

u

 11.3

(6 solder terminals)

Mounting assembly

B65545

356

Adjusting screws

B65549

357

P 18 

u

 11

IEC 60133

Core

B65651

359

19.9 

u

 20.7 

u

 13.5

Coil former

B65652

360

Mounting assembly

B65655

361

Adjusting screws

B65659

362

1) Height above mounting plane

Selector guide

epcos-ferrites-and-accessories-html.html
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16

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

P cores (pot cores)

 (continued)

Core type

Standards

Mounting

dimensions (mm)

of assembly set

Base area

u

H

1)

Individual parts

of assembly set

Part

number

Page

P 22 

u

 13

IEC 60133

Core

B65661

364

24.5 

u

 26

u

 16.6

Coil former

B65662

365

Adjusting screw

B65812

366

P 26 

u

 16

IEC 60133

Core

B65671

368

27.8 

u

 28.5 

u

 19

Coil former

B65672

369

Mounting assembly

B65675

370

Adjusting screws

B65679

371

P 30 

u

 19

IEC 60133

Core

B65701

373

32.5 

u

 33.5 

u

 22.8

Coil former

B65702

374

Mounting assembly

B65705

375

Adjusting screws

B65679

376

P 36 

u

 22

Core

B65611

378

40 

u

 41.8 

u

 27.5

Coil former

B65612

379

Mounting assembly

B65615

380

Adjusting screws

B65679

381

P 41 

u

 25

Core

B65621

383

Mounting assembly

B65623

384

1) Height above mounting plane

Selector guide

epcos-ferrites-and-accessories-html.html
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17

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

P core halves and PS cores

Core type

(

‡ u

 height)

Standards

Material

Individual parts

of assembly set

Part number

Page

PS 7.35 

u

 3.6

IEC 62323

N22, M33

Core

B65933

388

Coil former

B65512

388

PS 9 

u

 3.5

IEC 62323

N22, M33

Core

B65935

389

Coil former

B65936

389

PCH 14 

u

 7.5

N22

Core

B65937

390

Coil former

B65542

390

PS 25 

u

 8.9

IEC 62323

N22

Core

B65939

391

Coil former

B65940

391

PS 30.5 

u

 10.2

IEC 62323

N22

Core

B65941

392

Coil former

B65942

392

PS 35 

u

 10.8

IEC 62323

N22

Core

B65947

393

PS 47 

u

 14.9

IEC 62323

N22

Core

B65943

394

PS 68 

u

 14.5

IEC 62323

N22

Core

B65928

395

Coil former

B65946

395

PCH 70 

u

 14.5

N22

Core

B65945

396

Coil former

B65946

396

PCH 150 

u

 30

N27

Core

B65949

397

Selector guide

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18

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

E cores

Core

type

1)

Standards Mounting

dimensions (mm)

of assembly set

L

u

 W 

u

 H

2)

Individual parts of assembly set

Part

number

Page

E 5

IEC 61246

Core

B66303 404

E 6.3

IEC 61246

Core

B66300 405

9

u

 8 

u

 5.7

Coil former/Cover cap

B66301 406

E 8.8

IEC 61246

Core

B66302 407

10 

u

 12.5 

u

 5.5

Coil former/Cover cap

B66302 408

E 10/5.5/5

Core

B66322 409

E 13/7/4

(EF 12.6)

IEC 61246

Core

B66305 410

15 

u

 17

u

 12

Coil former (horizontal)

B66202 411

10 

u

 15 

u

 17

Coil former (vertical)

B66202 412

Yoke

B66202 412

13.5 

u

 19.5 

u

 9.3

Coil former

B66306 413

Cover plate

B66414 414

E 14/8/4

Core

B66219 415

E 16/6/5

Core

B66393 416

E 16/8/5

(EF 16)

IEC 61246

Core

B66307 417

18 

u

 20

u

 14

Coil former (horizontal)

B66308 419

11 

u

 18 

u

 20

Coil former (vertical)

B66308 420

Yoke

B66308 420

E 19/8/5

Core

B66379 421

E 20/10/6

(EF 20)

IEC 61246

Core

B66311 422

22 

u

 22

u

 17

Coil former (horizontal)

B66206 423

15 

u

 22 

u

 24

Coil former (vertical)

B66206 423

24 

u

 21.5 

u

 14

Coil former (right-angle pins)

B66206 424

Yoke

B66206 425

15 

u

 22 

u

 24

Coil former for luminaires

B66206 426

Yoke

B66206 426

E 21/9/5

Core

B66314 427

E 25/13/7

(EF 25)

IEC 61246

Core

B66317 428

28 

u

 28 

u

 21

Coil former (horizontal)

B66208 429

18 

u

 28 

u

 29

Coil former (vertical)

B66208 430

Yoke

B66208 430

19 

u

 26 

u

 30

Coil former for SMPS

B66208 431

Yoke

B66208 431

1) The E core designations have been brought into line with IEC; the previous designations are given in parentheses.
2) Height above mounting plane

Selector guide

epcos-ferrites-and-accessories-html.html
background image

19

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

E cores

 (continued)

Core type

1)

Standards Mounting

dimensions (mm)

of assembly set

L

u

 W 

u

 H

2)

Individual parts of assembly set Part

number

Page

E 25.4/10/7

Core

B66315 432

E 30/15/7

Core

B66319 433

36 

u

 36

u

 12

Coil former (horizontal)

B66232 434

19 

u

 36 

u

 36

Coil former (vertical)

B66232 434

Yoke

B66232 434

E 32/16/9

IEC 61246

Core

B66229 436

(EF 32)

35 

u

 37 

u

 24

Coil former

B66230 437

Yoke

B66230 437

E 32/16/11

Core

B66233 438

E 34/14/9

Core

B66370 439

E 36/18/11

Core

B66389 440

39 

u

 38

u

 31

Coil former

B66390 441

E 40/16/12

Core

B66381 442

E 42/21/15

IEC 61246

Core

B66325 443

E 42/21/20

IEC 61246

Core

B66329 444

38 

u

 46

u

 52

Coil former

B66243 445, 446

E 47/20/16

Core

B66383 447

E 55/28/21

IEC 61246

Core

B66335 448

E 55/28/25

Core

B66344 449

E 56/24/19

Core

B66385 450

E 65/32/27

Core

B66387 451

Coil former

B66388 452

E 70/33/32

Core

B66371 453

Coil former

B66372 454

E 80/38/20

Core

B66375 455

1) The E core designations have been brought into line with IEC; the previous designations are given in parentheses.
2) Height above mounting plane

Selector guide

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20

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

ELP cores

Core set

Standards

Core types

Individual

parts of

assembly set

Part number

Page

with clamp

recess

w/o clamp

recess

EELP 14

IEC 62317-9 ELP 14/3.5/5

ELP core

B66281G

457

EILP 14

IEC 62317-9 I 14/1.5/5

(+ ELP 14/3.5/5)

I core

B66281P,

B66281K

458

EELP 18

IEC 62317-9 ELP 18/4/10

ELP core

B66283G

B66453G

459, 460

Clamp

B65804

461

EILP 18

IEC 62317-9 I 18/2/10

I core

B66283P,

B66283K

B66453P,

B66453K

460, 462

(+ ELP 18/4/10)

Clamp

B66284

461

EELP 22

IEC 62317-9 ELP 22/6/16

ELP core

B66285G

B66455G

464, 465

EILP 22

IEC 62317-9 I 22/2.5/16

I core

B66285P,

B66285K

B66455P,

B66455K

465, 467

(+ ELP 22/6/16)

Clamp

B65804

466

EELP 32

IEC 62317-9 ELP 32/6/20

ELP core

B66287G

B66457G

469, 470

Clamp

B65808

469

EILP 32

IEC 62317-9 I 32/3/20

(+ ELP 32/6/20)

I core

B66287P,

B66287K

B66457P,

B66457K

470, 472

Clamp

B66288

471

EELP 38

IEC 62317-9 ELP 38/8/25

ELP core

B66289G

B66459G

474, 476

EILP 38

IEC 62317-9 I 38/4/25

(+ ELP 38/8/25)

I core

B66289P,

B66289K

B66459P,

B66459K

475, 477

EELP 43

IEC 62317-9 ELP 43/10/28

ELP core

B66291G

B66461G

478, 480

EILP 43

IEC 62317-9 I 43/4/28

(+ ELP 43/10/28)

I core

B66291P,

B66291K

B66461P,

B66461K

479, 481

EELP 58

IEC 62317-9 ELP 58/11/38

ELP core

B66293G

482

EILP 58

IEC 62317-9 I 58/4/38

(+ ELP 58/11/38)

I core

B66293P,

B66293K

483

EELP 64

IEC 62317-9 ELP 64/10/50

ELP core

B66295G

484

EILP 64

IEC 62317-9 I 64/5/50

(+ ELP 64/10/50)

I core

B66295P,

B66295K

485

EELP 102 IEC 62317-9 ELP 102/20/38

ELP core

B66297G

486

EILP 102

IEC 62317-9 I 102/20/38

(+ ELP 102/20/38

I core

B66297P

487

Selector guide

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21

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

EQ cores

Core set

Standards

Core types

Individual parts

of assembly set

Part number

Page

EEQ 13

IEC 62317-9

EQ 13/2.85/9

Core

B66479

489

EIQ 13

IEC 62317-9

EQ 13/2.85/9

EQ core

B66479G

490

+ I 13/1/9

I core

B66479P

490

EEQ 20

IEC 62317-9

EQ 20/6.3/14

Core

B66483

491

EIQ 20

IEC 62317-9

EQ 20/6.3/14

EQ core

B66483G

492

+ I 20/2.3/14

I core

B66483P

492

EEQ 25

IEC 62317-9

EQ 25/8/18

Core

B66481

493

EIQ 25

IEC 62317-9

EQ 25/8/18

EQ core

B66481G

494

+ I 25/2.3/18

I core

B66481P

494

EEQ 30

IEC 62317-9

EQ 30/8/20

Core

B66506

495

EIQ 30

IEC 62317-9

EQ 30/8/20

EQ core

B66506G

496

+ I 30/2.7/20

I core

B66506P

496

Selector guide

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22

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

ER planar cores

ER cores

Core types

Standards

Mounting

dimensions (mm)

of assembly set

L

u

 W 

u

 H

1)

Individual parts

of assembly set

Part number

Page

ER 9.5/5

IEC 62317-9

Core

B65523

498

12 

u

 10

u

 5.7

Coil former

B65527

499

Yoke

B65527

499

ER 11/5

IEC 62317-9

Core

B65525

500

12.8 

u

 11.7 

u

 6

Coil former

B65526

501

Yoke

B65526

501

ER 14.5/6

IEC 62317-9

Core

B65513

502

ER 18/3/10

IEC 62317-9

Core

B66480

503

ER 23/5/13

IEC 62317-9

Core

B66482

504

ER 23/5/13

IEC 62317-9

ER core

B66482G

505

+ I 23/2/13

I core

B66482P

505

ER 25/6/15

IEC 62317-9

Core

B66484

506

ER 25/6/15

IEC 62317-9

ER core

B66484G

507

+ I 25/3/15

I core

B66484P

507

ER 32/5/21

IEC 62317-9

Core

B66501

508

Core types

Standards

Mounting

dimensions (mm)

of assembly set

L

u

 W 

u

 H

1)

Individual parts

of assembly set

Part number

Page

ER 28/17/11

IEC 62317-7

Core

B66433

510

ER 35/20/11

IEC 62317-7

Core

B66350

511

ER 42/22/15

Core

B66347

512

33 

u

 46

u

 55

Coil former

B66348

513

ER 46/17/18

Core

B66377

514

ER 49/27/17

IEC 62317-7

Core

B66391

515

ER 54/18/18

Core

B66357

516

1) Height above mounting plane

Selector guide

epcos-ferrites-and-accessories-html.html
background image

23

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

ETD cores

Core type

Standards

Mounting

dimensions (mm)

of assembly set

L

u

 W 

u

 H

1)

Individual parts

of assembly set

Part

number

Page

ETD 29/16/10 IEC 61185

Core

B66358 518

35.5 

u

 35.5 

u

 25.5 Coil former (horizontal) B66359 519

24 

u

 35.5 

u

 41.2

Coil former (vertical)

B66359 520

Yoke

B66359 519, 520

ETD 34/17/11 IEC 61185

Core

B66361 521

43 

u

 40 

u

 35

Coil former (horizontal) B66362 523

27.5 

u

 40 

u

 46

Coil former (vertical)

B66362 524

Yoke

B66362 523, 524

ETD 39/20/13 IEC 61185

Core

B66363 525

48 

u

 45 

u

 38

Coil former/Yoke

B66364 526

ETD 44/22/15 IEC 61185

Core

B66365 527

53 

u

 50 

u

 41

Coil former/Yoke

B66366 529

ETD 49/25/16 IEC 61185

Core

B66367 530

58 

u

 55 

u

 43.5

Coil former/Yoke

B66368 532

ETD 54/28/19 IEC 61185

Core

B66395 533

62 

u

 62 

u

 47

Coil former/Yoke

B66396 535

ETD 59/31/22 IEC 61185

Core

B66397 536

67 

u

 71 

u

 50

Coil former/Yoke

B66398 538

1) Height above mounting plane

Selector guide

epcos-ferrites-and-accessories-html.html
background image

24

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

EFD, EV cores

Core type

Mounting

dimensions (mm)

of assembly set

L

u

 W 

u

 H

 1

)

Individual parts

of assembly set

Part number

Page

EFD cores

EFD 10/5/3

Core

B66411

540

EFD 15/8/5

Core

B66413

541

19.3 

u

 17 

u

 8

Coil former/Yoke

B66414

542

21 

u

 16 

u

 8

Coil former/Yoke

B66414

543

Cover plate

B66414

543

EFD 20/10/7

Core

B66417

544

24.3 

u

 22 

u

 10

Coil former/Yoke

B66418

545

EFD 25/13/9

Core

B66421

546

29.3 

u

 27.3 

u

 12.5

Coil former/Yoke

B66422

547

EFD 30/15/9

Core

B66423

548

34.4 

u

 32.5 

u

 12.5

Coil former/Yoke

B66424

549

EV cores

EV 15/9/7

Core 

B66434

550

EV 25/13/13

Core

B66408

551

EV 30/16/13

Core

B66432

552

1) Height above mounting plane

Selector guide

epcos-ferrites-and-accessories-html.html
background image

25

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

U, UI cores

Toroids (ring cores)

Double-aperture cores

FPC film

Core set

Core types

Part number

Page

UU 93/152/16

UI 93/104/16

U 93/76/16

I 93/28/16

(+ U 93/76/16)

B67345B0003

B67345B0004

554

UU 93/152/20

UI 93/104/20

U 93/76/20

I 93/28/20

(+ U 93/76/20)

B67345B0010

B67345B0011

555

UU 93/152/30

UI 93/104/30

U 93/76/30

I 93/28/30

(+ U 93/76/30)

B67345B0001

B67345B0002

556

U 101/76/30

B67370

557

UU 126/182/20

UI 126/119/20

U 126/91/20

I 126/28/20

(+ U 126/91/20)

B67385G

B67385P

558

U 141/78/30

B67374

559

Toroids

R 2.5 … R 202

Technical report

IEC/TR 61604

B64290

565

Core height

2.0 … 14.5 mm

6.2; 8.3 and 14.5:

DIN 41279, shape G

B62152

603

Material

Part number

Page

C 350, C 351

B68450, B68451, B68452

605

Selector guide

epcos-ferrites-and-accessories-html.html
background image

26

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Index of part numbers

(In numerical order)

Part number Page

Type

B62152

603

Double-aperture cores

B64290

563

Toroids (ring cores)

B65491

336

P 3.3 

u

2.6 core

B65495

337

P 4.6 

u

4.1 core

B65501

338

P 5.8 

u

3.3 core

B65511

340

P 7 

u

4 core

B65512

341, 342, 388 P 7

u

4 coil former, mounting assembly, PS 7.35

u

3.6 core, coil former

B65513

502

ER 14.5/6 core

B65517

344

P 9 

u

5 core

B65518

347

P 9 

u

5 mounting assembly

B65522

345

P 9 

u

5 coil former, insulating washer

B65523

498

ER 9.5 core

B65524

346

P 9 

u

5 coil former (SMD)

B65525

500

ER 11/5 core

B65526

501

ER 11/5 coil former (SMD), yoke

B65527

499

ER 9.5 coil former (SMD), yoke

B65531

349

P 11 

u

7 core

B65532

350

P 11 

u

7 coil former

B65535

351

P 11 

u

7 mounting assembly

B65539

208, 219, 352 Adjusting screw for RM 4, RM 5, P 11 

u

7

B65541

354

P 14 

u

8 core

B65542

355, 390

P 14 

u

8 coil former, insulating washer, P core half 14 

u

7.5 coil former

B65545

356

P 14 

u

8 mounting assembly

B65549

357

P 14 

u

8 adjusting screw

B65611

378

P 36 

u

22 core

B65612

379

P 36 

u

22 coil former, insulating washer

B65615

380

P 36 

u

22 mounting assembly

B65621

383

P 41 

u

25 core

B65623

384

P 41 

u

25 mounting assembly

B65646

290

PM 50/39 core

B65647

291, 292

PM 50/39 coil former, mounting assembly

B65651

359

P 18 

u

11 core

B65652

360

P 18 

u

11 coil former, insulating washer

B65655

361

P 18 

u

11 mounting assembly

B65659

230, 236, 362 Adjusting screw for RM 6, RM 7, P 18 

u

11

B65661

364

P 22 

u

13 core

B65662

365

P 22 

u

13 coil former, insulating washer

Index of part numbers

epcos-ferrites-and-accessories-html.html
background image

27

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Index of part numbers

B65671

368

P 26 

u

16 core

B65672

369

P 26 

u

16 coil former, insulating washer

B65675

370

P 26 

u

16 mounting assembly

B65679

255, 371, 
376, 381

Adjusting screw for RM 10, P 26 

u

16, P 30

u

19, P 36 

u

22

B65684

293

PM 62/49 core

B65685

294, 295

PM 62/49 coil former, mounting assembly

B65686

296

PM 74/59 core

B65687

297, 298

PM 74/59 coil former, mounting assembly

B65701

373

P 30 

u

19 core

B65702

374

P 30 

u

19 coil former, insulating washer

B65705

375

P 30 

u

19 mounting assembly

B65713

299

PM 87/70 core

B65714

300

PM 87/70 coil former

B65733

301

PM 114/93 core

B65734

302

PM 114/93 coil former

B65803

204, 209

RM 4 core, RM 4 low-profile core

B65804

206, 210, 211

459, 466

RM 4 coil former, insulating washer,

RM 4 low-profile clamp, insulating washer, coil former (SMD)

ELP 18, ELP 22 clamp

B65805

213, 220

RM 5 core, RM 5 low-profile core

B65806

207, 208

215, 216

217, 218, 219

352

RM 4 clamp, adjusting screw

RM 5 coil former, clamp, insulating washer

RM 5 clamp (SMD), adjusting screw

Adjusting screw for P 11 

u

7

B65807

222, 231

RM 6 core, RM 6 low-profile core

B65808

224 … 229

469

RM 6 coil former, clamp, insulating washer

ELP 32 clamp

B65811

239, 247

RM 8 core, RM 8 low-profile core

B65812

241 … 246

248, 366

RM 8 coil former, clamp, insulating washer, adjusting screw

RM 8 low-profile clamp, insulating washer, P 22 

u

 13 adjusting screw

B65813

250, 256

RM 10 core, RM 10 low-profile core

B65814

252, 253, 254 RM 10 coil former, clamp, insulating washer

B65815

258, 262

RM 12 core, RM 12 low-profile core

B65816

259, 260

RM 12 coil former

B65819

233, 237

RM 7 core, RM 7 low-profile core

B65820

234, 235

RM 7 coil former, clamp, insulating washer

B65821

229

RM 6 coil former (SMD)

B65822

217, 218

RM 5 coil former (SMD)

Part number Page

Type

epcos-ferrites-and-accessories-html.html
background image

28

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Index of part numbers

B65839

307

EP 7 core

B65840

309, 310

EP 7 coil former, cap yoke, EP 7 coil former (SMD)

B65841

316

EP 10 core

B65842

318, 319

EP 10 coil former, mounting assembly

B65843

321, 326

EP 13 core, EPO 13 core

B65844

323 … 325

327, 328

EP 13 coil former, mounting assembly

EPO 13 coil former

B65845

329

EP 17 core

B65846

330, 331

EP 17 coil former, mounting assembly

B65847

332

EP 20 core

B65848

333, 334

EP 20 coil former, mounting assembly

B65855A

305

EP 5 core

B65855B

306

EP 6 core

B65857A

311

EPX 7/9 core

B65858

313

EPX 7/9 coil former

B65857C

314

EPX 9/9 core

B65859

320

EPX 10 core

B65875A

272

PQ 20/20 core

B65875B

271

PQ 20/16 core

B65877A

275

PQ 26/25 core

B65877B

273

PQ 26/20 core

B65878E

276, 274

PQ 26/25 coil former, PQ 26/20 coil former

B65879A

277

PQ 32/20 core

B65879B

279

PQ 32/30 core

B65880E

278, 280

PQ 32/20 coil former, PQ 32/30 coil former

B65881A

281

PQ 35/35 core

B65883A

283

PQ 40/40 core

B65883B

282

PQ 40/30 core

B65884E

284

PQ 40/40 coil former

B65885A

270

PQ 16/11.6 core

B65887

264, 268

RM 14 core, RM 14 low-profile core

B65888

265, 266, 267 RM 14 coil former, clamp, insulating washer

B65928

395

PS core 68 

u

14.5

B65933

388

PS core 7.35 

u

3.6

B65935

389

PS core 9 

u

 3.5

B65936

389

PS core 9 

u

3.5 coil former

B65937

390

P core half 14 

u

7.5

B65939

391

PS core 25 

u

8.9

Part number Page

Type

epcos-ferrites-and-accessories-html.html
background image

29

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Index of part numbers

B65940

391

PS core 25 

u

8.9 coil former

B65941

392

PS core 30.5 

u

10.2

B65942

392

PS core 30.5 

u

10.2 coil former

B65943

394

PS core 47 

u

14.9

B65945

396

P core half 70 

u

14.5

B65946

395, 396

P core half 68 

u

14.5 coil former, P core half 70 

u

14.5 coil former

B65947

393

PS core 35 

u

10.8

B65949

397

P core half 150 

u

30

B65981A

286

PQ 50/50 core

B65981B

285

PQ 50/40 core

B65982E

287

PQ 50/50 coil former

B66202

411, 412

E 13/7 coil former, yoke

B66206

423 … 426

E 20/10 coil former, yoke

B66208

429 … 431

E 25/13 coil former, yoke

B66219

415

E 14/8 core

B66229

436

E 32/16 core

B66230

437

E 32/16 coil former, yoke

B66232

434

E 30/15 coil former, yoke

B66233

438

E 32/16 core

B66243

445, 446

E 42/21 coil former

B66281

457, 458

ELP14/3.5 core, I 14/1.5 core

B66283

459, 460

ELP18/4 core, I 18/2 core

B66284

460

EILP 18 clamp

B66285

464, 465

ELP 22/6 core, I 22/2.5 core

B66287

469, 470

ELP 32/6 core, I 32/3 core

B66289

474, 475

ELP 38/8 core, I 38/4 core

B66291

478, 479

ELP 43/10 core, I 43/4 core

B66293

482, 483

ELP 58/11 core, I 58/4 core

B66295

484, 485

ELP 64/10 core, I 64/5 core

B66297

486, 487

ELP 102/20 core, I 102/7 core

B66300

405

E 6.3 core

B66301

406

E 6.3 coil former (SMD), cover cap

B66302

407, 408

E 8.8 core, coil former (SMD), cover cap

B66303

404

E 5 core

B66305

410

E 13/7 core

B66306

413

E 13/7 coil former (SMD)

B66307

417

E 16/8 core

B66308

419, 420

E 16/8 coil former, yoke

Part number Page

Type

epcos-ferrites-and-accessories-html.html
background image

30

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Index of part numbers

B66311

422

E 20/10 core

B66314

427

E 21/9 core

B66315

432

E 25.4/10 core

B66317

428

E 25/13 core

B66319

433

E 30/15 core

B66322

409

E 10/5.5 core

B66325

443

E 42/21 core

B66329

444

E 42/21 core

B66335

448

E 55/28 core

B66344

449

E 55/28 core

B66347

512

ER 42/22 core

B66348

513

ER 42/22 coil former

B66350

511

ER 35/20 core

B66357

516

ER 54/18 core

B66358

518

ETD 29/16 core

B66359

519, 520

ETD 29/16 coil former, yoke

B66361

521

ETD 34/17 core

B66362

523, 524

ETD 34/17 coil former, yoke

B66363

525

ETD 39/20 core

B66364

526

ETD 39/20 coil former, yoke

B66365

527

ETD 44/22 core

B66366

529

ETD 44/22 coil former, yoke

B66367

530

ETD 49/25 core

B66368

532

ETD 49/25 coil former, yoke

B66370

439

E 34/14 core

B66371

453

E 70/33 core

B66372

454

E 70/33/32 coil former

B66375

455

E 80/38 core

B66377

514

ER 46/17 core

B66379

421

E 19/8 core

B66381

442

E 40/16 core

B66383

447

E 47/20 core

B66385

450

E 56/24 core

B66387

451

E 65/32 core

B66388

452

E 65/32/27 coil former

B66389

440

E 36/18 core

B66390

441

E 36/18 coil former

B66391

515

ER 49/27 core

Part number Page

Type

epcos-ferrites-and-accessories-html.html
background image

31

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Index of part numbers

B66393

416

E 16/6 core

B66395

533

ETD 54/28 core

B66396

535

ETD 54/28 coil former, yoke

B66397

536

ETD 59/31 core

B66398

538

ETD 59/31 coil former, yoke

B66408

551

EV 25/13 core

B66411

540

EFD 10/5 core

B66413

541

EFD 15/8 core

B66414

414, 542, 543 E 13/7 cover plate, EFD 15/8 coil former, yoke, cover plate

B66417

544

EFD 20/10 core

B66418

545

EFD 20/10 coil former, yoke

B66421

546

EFD 25/13 core

B66422

547

EFD 25/13 coil former, yoke

B66423

548

EFD 30/15 core

B66424

549

EFD 30/15 coil former, yoke

B66432

552

EV 30/16 core

B66433

510

ER 28/17 core

B66434

550

EV 15/9 core

B66453

462, 463

ELP 18/4 core, I 18/2 core

B66455

467, 468

ELP 22/6 core, I 22/2.5 core

B66457

472, 473

ELP 32/6 core, I 32/3 core

B66459

476, 477

ELP 38/8 core, I 38/4 core

B66461

480, 481

ELP 43/10 core, I 43/4 core

B66479

489, 490

EQ 13/3 core, I 13/1 core

B66480

503

ER 18/3 core

B66481

493, 494

EQ 25/6 core, I 25/2 core

B66482

504, 505

ER 23/5 core, I 23/2 core

B66483

491, 492

EQ 20/6 core, I 20/2 core

B66484

506, 507

ER 25/6 core, I 25/3 core

B66501

508

ER 32/5 core

B66506

495, 496

EQ 30/8 core, I 30/3 core

B67345

554

555

556

U 93/76, UI 93/104 cores

U 93/76, UI 93/104 cores

U 93/76, UI 93/104 cores

B67370

557

U 101/76 core

B67374

559

U 141/78 core

B67385

558

U 126/91, UI 126/119 cores

B68450

607

FPC film

B68451

607

FPC film

Part number Page

Type

epcos-ferrites-and-accessories-html.html
background image
epcos-ferrites-and-accessories-html.html
background image

33

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

SIFERRIT

materials

Based on IEC 60401-3, the data specified here are typical data for the material in question, which 
have been determined principally on the basis of toroids (ring cores).

The purpose of such characteristic material data is to provide the user with improved means for 
comparing different materials.

There is no direct relationship between characteristic material data and the data measured using 
other core shapes and/or core sizes made of the same material. In the absence of further agree-
ments with the manufacturer, only those specifications given for the core shape and/or core size in 
question are binding.

SIFERRIT materials

epcos-ferrites-and-accessories-html.html
background image

34

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

SIFERRIT materials

1

Material application survey

Usage

Frequency range Material Specific application

Core type

High Q inductors

in resonant circuits

and filters

up to 0.1 MHz

N48

Filters in telephony,

MW IF filters

Gapped RM, P,

adjusting cores

0.2 – 1.6 MHz

M33

1.5 – 12 MHz

K1

Current transformers up to 3 MHz

T36

Energy meters

Toroids

Broadband

transformers

(e.g. antenna

transformers,

ISDN transformers,

digital data

transformers

(xDSL, LAN)

up to 3 MHz

T46

Impedance and matching

transformers (ISDN, xDSL

using paired core shapes

with air gap)

Toroids

T38

EP, RM, toroids

T66

N45

up to 10 MHz

M33

Radio-frequency

transformers

Double aper-
ture, toroids

up to 100 MHz

T57

LAN (also suitable for

xDSL in paired core shapes)

Toroids

M33

Balun transformers

Double aper-
ture, toroids

K1

Electromagnetic

Interference (EMI)

up to 3 MHz

T38

Current-compensated

chokes

E, toroids

T37

T36

T35

T65

up to 5 MHz

N30

E, toroids

up to 100 MHz

M13

Line attenuation,

current-compensated

chokes

Toroids

K8

K10

Sensors, ID systems

up to 1 MHz

N22

Inductive proximity switches P core halves

up to 2 MHz

M33

Medium and high

frequency switch-

mode power supplies

up to 100 kHz

N27

Power transformers

and chokes

E, ETD, ER, EQ, 
EFD, EV, ELP, 
RM, RM LP, 
PM, PQ, U

up to 500 kHz

N87

N88

N95

N96

N97

PC47

300 kHz to 1 MHz N49

up to 100 kHz

N41

Chokes

E, ETD, ER, EQ, 
EFD, EV, ELP, 
RM, RM LP, PM

N51

up to 500 kHz

N92

High voltage transformers

and power chokes

up to 200 kHz

N72

Electronic lamp ballast

devices

E, ETD

epcos-ferrites-and-accessories-html.html
background image

35

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

2

Material properties

Preferred application

Resonant circuit inductors

Inductors

for line

attenuation

Material

K1

M33

1)

N48

K10

Base material

NiZn

MnZn

MnZn

NiZn

Color code (adjuster)

violet

white

Symbol

Unit

Initial permeability

(T = 25 °C)

P

i

80

r

25%

750

r

25%

2300

r

25%

800

r

25%

Meas. field strength

Flux density (near

saturation) (f = 10 kHz)

H

B

S

 (25 °C)

B

S

 (100 °C)

A/m

mT

mT

5000

310

280

2000

400

310

1200

420

310

5000

320

240

Coercive field strength

(f = 10 kHz)

H

c

(25 °C)

H

c

(100 °C)

A/m

A/m

380

350

80

65

26

19

40

25

Optimum

frequency range

f

min

f

max

MHz

1.5 …

12

0.2 …

1.0

0.01 …

0.1

0.1 …

1.0

Relative

at f

min

loss factor

at f

max

tan

G

/

P

i

10

–6

10

–6

<40

<120

<12

<20

<4

<6

<15

<60

Hysteresis

material constant

K

B

10

–6

/mT <36

<1.8

<0.4

<5

Curie temperature

T

C

°C

>400

>200

>170

>150

Relative

temperature coefficient

at 25 … 55 °C

at  5 … 25 °C

D

F

10

–6

/K

2 … 8

7 … 1

0.5 … 2.6

0.3 … 1.3

0.3 … 1.3

Mean value of 

D

F

at 25 … 55 °C

10

–6

/K

4

1.6

0.70

10.0

Density (typical values)

kg/m

3

4800

4700

4700

5000

Disaccommodation

factor at 25 °C

DF

10

–6

20

8

2

Resistivity

U

:

m

10

5

5

3

10

5

Core shapes

RM, P,

Toroid,

P core

half

RM, P,

Toroid,

Double-

aperture,

P corehalf

RM, P

Toroid,

Double-

aperture

Other material properties (graphs) see page

52

57

70

55

1) For threaded cores 

P

i

 = 600 

r

20%

SIFERRIT materials

epcos-ferrites-and-accessories-html.html
background image

36

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Material properties

 (continued)

Preferred application

Inductors for line attenuation

Proximity

switches

Material

K8

M13

N22

Base material

NiZn

NiZn

MnZn

Color code (adjuster)

red

Symbol

Unit

Initial permeability

(T = 25 °C)

P

i

860

r

25%

2300

r

25%

2300

r

25%

Meas. field strength

Flux density (near

saturation) (f = 10 kHz)

H

B

S

 (25 °C)

B

S

 (100 °C)

A/m

mT

mT

1200

340

240

1200

280

135

1200

370

260

Coercive field strength

(f = 10 kHz)

H

c

(25 °C)

H

c

(100 °C)

A/m

A/m

40

25

12

8

18

14

Optimum

frequency range

f

min

f

max

MHz

0.1 …

0.5

0.001 …

0.1

0.001 …

0.2

Relative at 

f

min

loss factor

at f

max

tan

G

/

P

i

10

–6

10

–6

<20

<30

<5

<20

<2

<20

Hysteresis

material constant

K

B

10

–6

/mT <4.5

<4.0

<1.4

Curie temperature

T

C

°C

>150

>105

>145

Relative

temperature coefficient

at 25 … 55 °C

at  5 … 25 °C

D

F

10

–6

/K

Mean value of 

D

F

at 25 … 55 °C

10

–6

/K

9.2

3.7

0.9

Density (typical values)

kg/m

3

5100

5200

4700

Disaccommodation

factor at 25 °C

DF

10

–6

4

Resistivity

U

:

m

10

5

10

5

1

Core shapes

Toroid

Toroid,

Double-

aperture

P core half

Other material properties (graphs) see page

54

56

59

SIFERRIT materials

epcos-ferrites-and-accessories-html.html
background image

37

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Material properties 

(continued)

Preferred application

Broadband transformers

Material

N45

T57

N30

T65

Base material

MnZn

MnZn

MnZn

MnZn

Symbol

Unit

Initial permeability

(T = 25 °C)

P

i

3800

r

25%

4000

r

25%

4300

r

25%

5200

r

30%

Meas. field strength

Flux density (near

saturation) (f = 10 kHz)

H

B

S

 (25 °C)

B

S

 (100 °C)

A/m

mT

mT

550

435

1200

430

270

1200

380

240

1200

460

320

Coercive field strength

(f = 10 kHz)

H

c

(25 °C)

H

c

(100 °C)

A/m

A/m

15

21

14

12

12

8

12

11

Optimum

frequency range

f

min

f

max

MHz

0.01 … 
0.10

0.01 …

0.5

0.01 …

0.40

0.01 …

0.20

Relative at 

f

min

loss factor

at f

max

tan

G

/

P

i

10

–6

10

–6

<1.0

<2.0

<5

<70

<2

<60

<1.5

<25

Hysteresis

material constant

K

B

10

–6

/mT <0.3

<0.3

<1.1

<1.1

Curie temperature

T

C

°C

>255

>140

>130

>160

Relative

temperature coefficient

at 25 … 55 °C

at  5 … 25 °C

D

F

10

–6

/K

–8 … –5.0

1.5 … 3.0

Mean value of 

D

F

at 25 … 55 °C

10

–6

/K

0.5

0.6

– 0.5

Density (typical values)

kg/m

3

4900

4900

4900

4900

Disaccommodation

factor at 25 °C

DF

10

–6

Resistivity

U

:

m

11

3

0.5

0.30

Core shapes

ER, EP,

RM

RM, P, EP,

Toroid

RM, P, EP,

E, Toroid,

Double-

aperture

RM, P,

Toroid,

EP

Other material properties (graphs) see page

68

113

63

115

SIFERRIT materials

epcos-ferrites-and-accessories-html.html
background image

38

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Material properties 

(continued)

Preferred application

Broadband transformers

Material

T35

T37

T36

Base material

MnZn

MnZn

MnZn

Symbol

Unit

Initial permeability

(T = 25 °C)

P

i

6000

r

25%

6500

r

25%

7000

r

25%

Meas. field strength

Flux density (near

saturation) (f = 10 kHz)

H

B

S

 (25 °C)

B

S

 (100 °C)

A/m

mT

mT

1200

390

270

1200

380

240

1200

400

240

Coercive field strength

(f = 10 kHz)

H

c

(25 °C)

H

c

(100 °C)

A/m

A/m

12

9

9

8

22

24

Optimum

frequency range

f

min

f

max

MHz

0.01 …

0.20

0.01 …

0.30

0.05 kHz…

100 kHz

Relative

at f

min

loss factor

at f

max

tan

G

/

P

i

10

–6

10

–6

<4

<60

<2

<60

<3

<30

Hysteresis

material constant

K

B

10

–6

/mT <1.1

<1.1

<1.1

Curie temperature

T

C

°C

>130

>130

>130

Relative

temperature coefficient

at 25 … 55 °C

at  5 … 25 °C

D

F

10

–6

/K

Mean value of 

D

F

at 25 … 55 °C

10

–6

/K

0.8

– 0.3

0.5

Density (typical values)

kg/m

3

4900

4900

4950

Disaccommodation

factor at 25 °C

DF

10

–6

Resistivity

U

:

m

0.2

0.2

0.2

Core shapes

RM, P, EP,

Toroid

Toroid

Toroid

Other material properties (graphs) see page

103

107

105

SIFERRIT materials

epcos-ferrites-and-accessories-html.html
background image

39

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Material properties 

(continued)

Preferred application

Broadband transformers

Material

T38

T66

T46

1)

Base material

MnZn

MnZn

MnZn

Symbol

Unit

Initial permeability

(T = 25 °C)

P

i

10000

r

30%

13000

r

30%

15000

r

30%

Meas. field strength

Flux density (near

saturation) (f = 10 kHz)

H

B

S

 (25 °C)

B

S

 (100 °C)

A/m

mT

mT

1200

430

260

1200

360

1200

400

240

Coercive field strength

(f = 10 kHz)

H

c

(25 °C)

H

c

(100 °C)

A/m

A/m

8

7

8

7

7

6

Optimum

frequency range

f

min

f

max

MHz

0.01 … 0.10

0.01 … 0.10

0.01 … 0.10

Relative at 

f

min

loss factor

at f

max

tan

G

/

P

i

10

–6

10

–6

<2.0

<20

<1

<30

<8

<100

Hysteresis

material constant

K

B

10

–6

/mT <0.3

<0.3

<2.0

Curie temperature

T

C

°C

>130

>100

>130

Relative

temperature coefficient

at 25 … 55 °C

at  5 … 25 °C

D

F

10

–6

/K

0.78

0.40

Mean value of 

D

F

at 25 … 55 °C

10

–6

/K

– 0.2

– 0.6

Density (typical values)

kg/m

3

4900

4950

4950

Disaccommodation

factor at 25 °C

DF

10

–6

Resistivity

U

:

m

0.1

0.8

0.01

Core shapes

RM, P, EP, ER,

Toroid, E

EP, Toroid,

RM

Toroid, E

Other material properties (graphs) see page

109

117

111

1) Material values defined on the basis of small toroids (

d

R10)

SIFERRIT materials

epcos-ferrites-and-accessories-html.html
background image

40

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Material properties 

(continued)

Preferred application

Power transformers

Material

N49

N92

N27

Base material

MnZn

MnZn

MnZn

Symbol

Unit

Initial permeability

(T = 25 °C)

P

i

1500

r

25%

1500

r

25%

2000

r

25%

Flux density

(H = 1200 A/m, f = 10 kHz)

B

S

 (25 °C)

B

S

 (100 °C)

mT

mT

490

400

500

440

500

410

Coercive field strength

(f = 10 kHz)

H

c

(25 °C)

H

c

(100 °C)

A/m

A/m

38

33

24

13

23

19

Optimum

frequency range

kHz

300 …

1000

25 …

500

25 …

150

Hysteresis

material constant

K

B

10

–6

/mT <0.4

<1.4

<1.5

Curie temperature

T

C

°C

>240

>280

>220

Mean value of 

D

F

at 25 … 55 °C

10

–6

/K

3

Density (typical values)

kg/m

3

4750

4850

4800

Relative core losses

(typical values)

P

V

25 kHz, 200 mT, 100 °C

kW/m

3

70

155

100 kHz, 200 mT, 100 °C

kW/m

3

410

920

300 kHz, 100 mT, 100 °C

kW/m

3

330

410

500 kHz, 50 mT, 100 °C

kW/m

3

80

230

1 MHz, 50 mT, 100 °C

kW/m

3

475

Resistivity

U

:

m

17

8

3

Core shapes

RM, EFD,

ELP, Toroid,

EQ, ER

RM, ETD,

EFD, ER, E,

ELP, Toroid,

EQ, ER

P, PM, ETD,

ER, E, U,

Toroid

Other material properties (graphs) see page

72

88

60

SIFERRIT materials

epcos-ferrites-and-accessories-html.html
background image

41

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Material properties 

(continued)

Preferred application

Power transformers

Material

N87

N97

N72

Base material

MnZn

MnZn

MnZn

Symbol

Unit

Initial permeability

(T = 25 °C)

P

i

2200

r

25%

2300

r

25%

2500

r

25%

Flux density

(H = 1200 A/m, f = 10 kHz)

B

S

 (25 °C)

B

S

 (100 °C)

mT

mT

490

390

510

410

480

370

Coercive field strength

(f = 10 kHz)

H

c

(25 °C)

H

c

(100 °C)

A/m

21

13

21

12

15

11

Optimum frequency range

kHz

25 …

500

25 …

500

25 …

300

Hysteresis

material constant

K

B

10

–6

/mT <1.0

<1.0

<1.4

Curie temperature

T

C

°C

>210

>230

>210

Mean value of 

D

F

at 25 … 55 °C

10

–6

/K

4

4

3

Density (typical values)

kg/m

3

4850

4850

4750

Relative core losses

(typical values)

P

V

25 kHz, 200 mT, 100 °C

kW/m

3

57

45

80

100 kHz, 200 mT, 100 °C

kW/m

3

375

300

540

300 kHz, 100 mT, 100 °C

kW/m

3

390

340

500

500 kHz, 50 mT, 100 °C

kW/m

3

215

205

Resistivity

U

:

m

10

8

12

Core shapes

RM, P, PM,

ETD, EFD, E,

ER, EP, EQ,

ELP, U, Toroid

RM, PM,

ETD, EFD,

ER, EQ, E,

ELP, Toroid

E, EFD

Other material properties (graphs) see page

81

97

78

SIFERRIT materials

epcos-ferrites-and-accessories-html.html
background image

42

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Material properties 

(continued)

1) Preliminary data
2) For cores up to 100 g

Preferred application

Power transformers

Material

N88

1)

N96

1)

PC47

2)

Base material

MnZn

MnZn

MnZn

Symbol

Unit

Initial permeability

(T = 25 °C)

P

i

1900

r

25%

2900

r

25%

2500

r

25%

Flux density

(H = 1200 A/m, f = 10 kHz)

B

S

 (25 °C)

B

S

 (100 °C)

B

S

 (140 °C)

mT

mT

mT

500

400

340

500

410

530

420

Coercive field strength

(f = 10 kHz)

H

c

(25 °C)

H

c

(100 °C)

H

c

(140 °C)

A/m

A/m

A/m

16

10

12

16

15

13

6

Optimum frequency range

kHz

25 …

500

25 …

500

10 …

500

Hysteresis

material constant

K

B

10

–6

/mT <1.5

<0.5

<1

Relative at 

f

min

loss factor

at f

max

tan

G

/

P

i

10

–6

10

–6

<10

<30

<2

<20

<10

<20

Curie temperature

T

C

°C

>220

>240

>230

Mean value of 

D

F

at 25 … 55 °C

10

–6

/K

4

1

4

Density (typical values)

kg/m

3

4900

4850

4900

Relative core losses

(typical values)

P

V

100 kHz, 200 mT, 25 °C

kW/m

3

720

325

600

100 kHz, 200 mT, 60 °C

kW/m

3

330

100 kHz, 200 mT, 100 °C

kW/m

3

380

390

270

100 kHz, 200 mT, 140 °C

kW/m

3

340

300 kHz, 100 mT, 100 °C

kW/m

3

360

Resistivity

U

:

m

10

10

4

Core shapes

E, ER, ETD, U E, EQ, PQ, 

ETD

E, EQ, PQ, 
ETD

Other material properties (graphs) see page

84

94

100

SIFERRIT materials

epcos-ferrites-and-accessories-html.html
background image

43

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Material properties 

(continued)

Preferred application

Power transformers

Material

N41

N51

N95

Base material

MnZn

MnZn

MnZn

Symbol

Unit

Initial permeability

(T = 25 °C)

P

i

2800

r

25%

3000

r

25%

3000

r

25%

Flux density

(H = 1200 A/m, f = 10 kHz)

B

S

 (25 °C)

B

S

 (100 °C)

mT

mT

490

390

480

380

525

410

Coercive field strength

(f = 10 kHz)

H

c

(25 °C)

H

c

(100 °C)

A/m

22

20

5

5

18

19

Optimum frequency range

kHz

25 … 150

25 … 150

25 … 500

Hysteresis

material constant

K

B

10

–6

/mT <1.4

<0.4

<0.6

Curie temperature

T

C

°C

>220

>220

>220

Mean value of 

D

F

at 25 … 55 °C

10

–6

/K

4

2

2

Density (typical values)

kg/m

3

4750

4800

4900

Relative core losses

(typical values)

P

V

25 kHz, 200 mT, 25 °C

kW/m

3

75

100 kHz, 200 mT, 25 °C

kW/m

3

450

425

300 kHz, 100 mT, 25 °C

kW/m

3

400

455

500 kHz, 50 mT, 25 °C

kW/m

3

250

25 kHz, 200 mT, 100 °C

kW/m

3

180

110

100 kHz, 200 mT, 100 °C

kW/m

3

1400

700

350

300 kHz, 100 mT, 100 °C

kW/m

3

630

410

500 kHz, 50 mT, 100 °C

kW/m

3

250

Resistivity

U

:

m

2

6

6

Core shapes

RM, P

E, ER, ETD

E, ER, ETD

Other material properties (graphs) see page

65

75

91

SIFERRIT materials

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04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Material properties 

(continued)

Preferred application

Film

Material

Ferrite polymer composite (FPC)

Base material

C350

C351

Symbol

Unit

Initial permeability

f = 1 MHz

P

i

9

r

20%

9

r

20%

Flux density (near saturation)

H = 25 kA/m

f = 10 kHz

B

S

 (25

q

C)

mT

255

255

Remanent induction

H = 25 kA/m

f = 10 kHz

B

r

 (25

q

C)

mT

9

9

Coercive field strength

H = 25 kA/m

f = 10 kHz

H

C

 (25

q

C) A/m

600

600

Relative loss factor

f = 

1 MHz

f = 100 MHz

f = 

1 GHz

tan

G

/

P

i

<0.005

<0.400

<0.005

<0.400

Hysteresis material constant

K

B

10

–3

/mT <2

<2

Temperature coefficient

D

=

'P

/

P'

T

1/K

<5 ·10

-5

<5 ·10

-5

Density

kg/m

3

2930

2930

Resistivity

f =  1 kHz

f = 10 kHz

f = 10 MHz

U

:

m

500

100

500

100

Relative permittivity

f =  1 kHz

f = 10 kHz

f = 10 MHz

H

r

700

21

700

21

Maximum operating temperature T

max

q

C

120

200

Dielectric strength

kV/mm

1

0.8

Tensile strength

1)

V

Z

N/mm

2

1.5

2.5

Tearing resistance

1)

%

25

25

Compressibility

1)

N

N/mm

2

70

70

Other material properties (graphs) see page

1) T = 23 °C and 50% relative humidity

SIFERRIT materials

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

3

Measuring conditions

The following measuring conditions, which correspond largely to IEC 60401-3, apply for the material 
properties given in the table:

Properties (valid only

for ring cores of sizes

R 10 to R 36)

Measuring conditions

Frequency

Field

strength

(material-

dependent)

Max. flux

density

Temper-

ature

Symbol

Unit

kHz

kA/m

mT

°C

Initial permeability

P

i

d

10

d

0.25

25

Flux density

near to saturation

B

mT

d

10

t

1.2

25; 100

Coercive field strength

H

c

A/m

kA/m

d

10

t

1.2

near

saturation

25; 100

Relative loss factor

tan 

G

/

P

i

d

 0.25

25

Hysteresis material

constant

K

B

10

–6

/mT

10 (

P

i

t

500)

100 (

P

i

500)

B

1

B

2

1.5

3.0

0.3

1.2

25

Curie temperature

T

c

°C

d

10

d

0.25

Relative temperature

coefficient

D

F

10

–6

/K

d

10

d

0.25

5 … 25

25 … 55

Density

kg/m

3

25

Disaccommodation

factor

DF

10

–6

d

10

d

0.25

25; 60

1)

Resistivity

U

:

m

DC

25

The following properties are given only for materials for power applications:

Power loss

P

V

kW/m

3

25

100

300

500

1000

200

200

100

50

50

100

1)  Higher temperature than specified by IEC (40 °C)

SIFERRIT materials

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

4

Specific material data

DC magnetic bias

The curves of 

P

rev

 = f(H

DC

) allow an approximate calculation of the variation in reversible perme-

ability (

P

rev

) and A

L

 value caused by magnetic bias. These curves are of particular interest for cores 

for transformers and chokes, since magnetic bias should be avoided if possible with inductors re-
quiring high stability (filter inductors etc.). In the case of geometrically similar cores (i.e. in particular 
the same A

min

/A

e

 ratio) the effective permeability of the core in question in conjunction with the giv-

en curves suffices to determine the reversible permeability to a close approximation.

H

DC

I

DC

N

˜

I

e

-----------------

=

H

DC

=

  DC field strength 

A/m

I

DC

=

 Direct current 

A

N

=

  Number of turns

l

e

=

  Effective magnetic path length 

m

SIFERRIT materials

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Relative loss factor versus frequency

 (inductors for resonant circuits and line attenuation)

(measured with ring cores, measuring flux density 

d

0,25 mT)

B

Inductors for resonant circuits and proximity switches

SIFERRIT materials

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Relative inductance component versus frequency 

(broadband transformers)

(measured with ring cores, measuring flux density 

d

0,25 mT)

B

Broadband transformers

SIFERRIT materials

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Performance factor versus frequency

 (power transformers)

(measured with ring cores R29, T = 100 °C, P

V

 = 300 kW/m

3

)

For definition of performance factor see page 132.

Power transformers

SIFERRIT materials

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04/13

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Standardized hysteresis material constant versus temperature

Broadband and filter applications

Normalized impedance

SIFERRIT materials

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

K1

K8

K10

M13

For explanation of Z

n

 see page 150.

Normalized impedance

SIFERRIT materials

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Complex permeability

versus frequency

(measured on R10 toroids, 

d

0.25 mT)

Permeability factor versus temperature

(measured on P and RM cores,

d

0.25 mT), 

P

i

|

80

Initial permeability 

P

i

 and relative loss factor

tan

G

/

P

i

 versus temperature

(measured on R10 toroids, 

d

0.25 mT)

B

B

B

K1

Specific data for K1

SIFERRIT materials

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

K1

SIFERRIT materials

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Complex permeability

versus frequency

(measured on R10 toroids, 

d

0.25 mT)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

Initial permeability 

P

i

 and relative loss factor

tan

G

/

P

i

 versus temperature

(measured on R10 toroids, 

d

0.25 mT)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

B

B

K8

Specific data for K8

SIFERRIT materials

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

K10

Specific data for K10

SIFERRIT materials

Complex permeability

versus frequency

(measured on R10 toroids, 

d

0.25 mT)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

Initial permeability 

P

i

 and relative loss factor

tan

G

/

P

i

 versus temperature

(measured on R10 toroids, 

d

0.25 mT)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

B

B

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

M13

Specific data for M13

SIFERRIT materials

Complex permeability

versus frequency

(measured on R10 toroids, 

d

0.25 mT)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

Initial permeability 

P

i

 and relative loss factor

tan

G

/

P

i

 versus temperature

(measured on R25 toroids, 

d

0.25 mT)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

B

B

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

M33

Specific data for M33

SIFERRIT materials

Complex permeability

versus frequency

(measured on R10 toroids, 

d

0.25 mT)

Permeability factor versus temperature

(measured on P and RM cores,

d

0.25 mT), 

P

i

|

750

Initial permeability 

P

i

 and relative loss factor

tan

G

/

P

i

 versus temperature

(measured on R10 toroids, 

d

0.25 mT)

DC magnetic bias of P and RM cores

(typical values)

(

d

 0.25 mT, f = 10 kHz, T = 25 °C)

B

B

Mean value

B

B

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04/13

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

M33

SIFERRIT materials

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

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04/13

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N22

Specific data for N22

SIFERRIT materials

Complex permeability

versus frequency

(measured on R10 toroids, 

d

0.25 mT)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

Initial permeability 

P

i

 and relative loss factor

tan

G

/

P

i

 versus temperature

(measured on R10 toroids, 

d

0.25 mT)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

B

B

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N27

Specific data for N27

SIFERRIT materials

Complex permeability

versus frequency

(measured on R10 toroids, 

d

0.25 mT)

Amplitude permeability versus AC field

flux density

(measured on ungapped E cores)

Initial permeability 

P

i

versus temperature

(measured on R10 toroids, 

d

0.25 mT)

B

B

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N27

SIFERRIT materials

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

DC magnetic bias

measured on ETD cores

(

d

 0.25 mT, f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

B

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N27

SIFERRIT materials

Relative core losses versus AC field

flux density

(measured on R16 toroids)

Relative core losses

versus frequency

(measured on R16 toroids)

Relative core losses

versus temperature

(measured on R16 toroids)

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04/13

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N30

Specific data for N30

SIFERRIT materials

Complex permeability

versus frequency

(measured on R10 toroids, 

d

0.25 mT)

Variation of initial permeability

with temperature

(measured on R10 toroids, 

d

0.25 mT)

Initial permeability 

P

i

versus temperature

(measured on R10 toroids, 

d

0.25 mT)

Relative loss factor

versus frequency

(measured on R20 toroids, 

d

0.25 mT)

B

B

B

B

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04/13

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N30

SIFERRIT materials

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

DC magnetic bias of RM cores

(typical values)

(

d

0.25 mT, f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

B

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04/13

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N41

Specific data for N41

SIFERRIT materials

Complex permeability

versus frequency

(measured with R10 ring cores, 

d

0.25 mT)

Amplitude permeability

versus AC field flux density

(measured on ungapped E cores)

Initial permeability 

P

i

versus temperature

(measured with R10 ring cores, 

d

0.25 mT)

B

B

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04/13

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N41

SIFERRIT materials

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

DC magnetic bias

of P and RM cores

(

d

0.25 mT, f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

B

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67

04/13

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N41

SIFERRIT materials

Relative core losses

versus AC field flux density

(measured on R16 toroids)

Relative core losses

versus frequency

(measured on R16 toroids)

Relative core losses

versus temperature

(measured on R16 toroids)

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04/13

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N45

Specific data for N45

SIFERRIT materials

Complex permeability

versus frequency

(measured on R29 toroids, 

d

0.25 mT)

Variation of initial

permeability with temperature

(measured on R29 toroids, 

d

0.25 mT)

Initial permeability 

P

i

versus temperature

(measured on R29 toroids, 

d

0.25 mT)

Relative loss factor

versus frequency

(measured on R29 toroids, 

d

0.25 mT)

B

B

B

B

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04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N45

SIFERRIT materials

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

DC magnetic bias of P and RM cores

(typical values)

(

d

0.25 mT, f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

B

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Complex permeability

versus frequency

(measured on R10 toroids, 

d

0.25 mT)

Permeability factor versus temperature

(measured on P and RM cores, 

d

0.25 mT),

P

i

|

2300

Initial permeability 

P

i

 and relative loss factor

tan

G

/

P

i

 versus temperature

(measured on R10 toroids, 

d

0.25 mT)

Relative loss factor tan

G

/

P

i

versus frequency

(measured on R29 toroids)

B

B

B

N48

Specific data for N48

SIFERRIT materials

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

DC magnetic bias

(measured on ETD cores, typical values)

(

d

0.25 mT, f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

B

N48

SIFERRIT materials

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Complex permeability

versus frequency

(measured on R34 toroids,

d

0.25 mT)

Amplitude permeability

versus AC field flux density

(measured on R34 toroids,

d

0.25 mT)

Initial permeability 

P

i

versus temperature

(measured on R34 toroids, 

d

0.25 mT)

B

B

B

N49

Specific data for N49

SIFERRIT materials

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

DC magnetic bias

measured on ETD cores

(

d

0.25 mT, f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

DC magnetic bias

measured on ETD cores

(

d

0.25 mT, f = 10 kHz, T = 100 °C)

B

B

N49

SIFERRIT materials

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background image

74

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Relative core losses

versus AC field flux density

(measured on R34 toroids)

Relative core losses

versus frequency

(measured on R34 toroids)

Relative core losses

versus temperature

(measured on R34 toroids)

N49

SIFERRIT materials

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background image

75

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N51

 N51

SIFERRIT materials

Complex permeability

versus frequency

(measured on R34 toroids,

d

0.25 mT)

Amplitude permeability

versus AC field flux density

(measured on R34 toroids,

d

0.25 mT)

Initial permeability 

P

i

versus temperature

(measured on R34 toroids, 

d

0.25 mT)

B

B

B

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76

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N51

SIFERRIT materials

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

DC magnetic bias

measured on E cores

(

d

0.25 mT, f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

B

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77

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N51

SIFERRIT materials

Relative core losses

versus AC field flux density

(measured on R34 toroids)

Relative core losses

versus temperature

(measured on R34 toroids)

Relative core losses

versus frequency

(measured on R34 toroids)

Relative core losses

versus temperature

(measured on R34 toroids)

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78

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N72

Specific data for N72

SIFERRIT materials

Complex permeability

versus frequency

(measured on R29 toroids, 

d

0.25 mT)

Amplitude permeability versus AC field

flux density

(measured on ungapped U cores)

Initial permeability 

P

i

versus temperature

(measured on R29 toroids, 

d

0.25 mT)

B

B

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79

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N72

SIFERRIT materials

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

DC magnetic bias measured on E cores

(

d

0.25 mT, f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

DC magnetic bias measured on E cores

(

d

0.25 mT, f = 10 kHz, T = 100 °C)

B

B

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80

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N72

SIFERRIT materials

Relative core losses versus AC field

flux density

(measured on R29 toroids)

Relative core losses

versus frequency

(measured on R29 toroids)

Relative core losses

versus temperature

(measured on R29 toroids)

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81

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N87

Specific data for N87

SIFERRIT materials

Complex permeability

versus frequency

(measured on R34 toroids, 

d

0.25 mT)

Amplitude permeability

versus AC field flux density

(measured on R34 toroids, 

d

0.25 mT)

Initial permeability 

P

i

versus temperature

(measured on R34 toroids, 

d

0.25 mT)

B

B

B

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82

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N87

SIFERRIT materials

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

DC magnetic bias

of P, RM, PM and E cores

(

d

0.25 mT, f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

DC magnetic bias

of P, RM, PM and E cores

(

d

0.25 mT, f = 10 kHz, T = 100 °C)

B

B

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83

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N87

SIFERRIT materials

Relative core losses

versus AC field flux density

(measured on R34 toroids)

Relative core losses

versus frequency

(measured on R34 toroids)

Relative core losses

versus temperature

(measured on R34 toroids)

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background image

84

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N88

Specific data for N88

Preliminary data

SIFERRIT materials

Complex permeability

versus frequency

(measured on R34 toroids, 

d

0.25 mT)

Amplitude permeability 

versus AC field flux density

(measured on R34 toroids, f < 10 kHz)

Initial permeability 

P

i

versus frequency

(measured on R34 toroids, 

d

0.25 mT)

B

B

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85

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N88

Preliminary data

SIFERRIT materials

Dynamic magnetization curves 

(typical values)

(f = 10 kHz, T = 25 °C)

Dynamic magnetization curves 

(typical values)

(f = 10 kHz, T = 140 °C)

Dynamic magnetization curves 

(typical values)

(f = 10 kHz, T = 100 °C)

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86

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N88

Preliminary data

SIFERRIT materials

DC Magnetic bias 

measured on ETD29 cores 

(

d

0.25 mT, f =10 kHz, T =  25 °C)

DC Magnetic bias 

measured on ETD29 cores 

(

d

0.25 mT, f =10 kHz, T =  100 °C)

B

B

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87

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

N88

SIFERRIT materials

Relative core losses
versus AC field flux density
(measured on R34 toroids)

Relative core losses
versus frequency
(measured on R34 toroids)

Relative core losses
versus temperature
(measured on R34 toroids, f = 100 kHz)

Preliminary data

epcos-ferrites-and-accessories-html.html
background image

88

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Complex permeability

versus frequency

(measured on R34 toroids, 

d

0.25 mT)

Amplitude permeability

versus AC field flux density

(measured on R34 toroids, 

d

0.25 mT)

Initial permeability 

P

i

versus temperature

(measured on R34 toroids, 

d

0.25 mT)

B

B

B

N92

Specific data for N92

SIFERRIT materials

epcos-ferrites-and-accessories-html.html
background image

89

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

DC magnetic bias

measured on ETD cores

(

d

0.25 mT, f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

DC magnetic bias

measured on ETD cores

(

d

0.25 mT, f = 10 kHz, T = 100 °C)

B

B

N92

SIFERRIT materials

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90

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Relative core losses

versus AC field flux density

(measured on R34 toroids)

Relative core losses

versus frequency

(measured on R34 toroids)

Relative core losses

versus temperature

(measured on R34 toroids)

N92

SIFERRIT materials

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background image

91

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Complex permeability

versus frequency

(measured on R34 toroids, 

d

0.25 mT)

Amplitude permeability

versus AC field flux density

(measured on R34 toroids, 

d

0.25 mT)

Initial permeability 

P

i

versus temperature

(measured on R34 toroids, 

d

0.25 mT)

B

B

B

N95

 N95

SIFERRIT materials

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background image

92

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

DC magnetic bias

measured on ETD cores

(

d

0.25 mT, f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

DC magnetic bias

measured on ETD cores

(

d

0.25 mT, f = 10 kHz, T = 100 °C)

B

B

N95

SIFERRIT materials

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93

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Relative core losses

versus AC field flux density

(measured on R34 toroids)

Relative core losses

versus frequency

(measured on R34 toroids)

Relative core losses

versus temperature

(measured on R34 toroids)

N95

SIFERRIT materials

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background image

94

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Complex permeability

versus frequency

(measured on R34 toroids, 

d

0.25 mT)

Amplitude permeability 

versus AC field flux density

(measured on R34 toroids, f < 10kHz)

Initial permeability 

P

i

versus temperature

(measured on R34 toroids, 

d

0.25 mT)

B

B

N96

Specific data for N96

Preliminary data

SIFERRIT materials

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background image

95

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Dynamic magnetization curves 

(typical values)

(f = 10 kHz, T = 25 °C)

DC Magnetic bias 

measured on EQ30 cores 

(

d

0.25 mT, f =10 kHz, T =  25 °C)

Dynamic magnetization curves 

(typical values)

(f = 10 kHz, T = 100 °C)

DC Magnetic bias 

measured on EQ30 cores 

(

d

0.25 mT, f =10 kHz, T =  100 °C)

B

B

N96

Preliminary data

SIFERRIT materials

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background image

96

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Relative core losses 

versus AC field flux density

(measured on R34 toroids)

Relative core losses

versus frequency

(measured on R34 toroids)

Relative core losses 

versus temperature

(R34 toroids, f = 100 kHz)

N96

Preliminary data

SIFERRIT materials

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background image

97

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Complex permeability

versus frequency

(measured on R34 toroids, 

d

0.25 mT)

Amplitude permeability

versus AC field flux density

(measured on R34 toroids, 

d

0.25 mT)

Initial permeability 

P

i

versus temperature

(measured on R34 toroids, 

d

0.25 mT)

B

B

B

N97

Specific data for N97

SIFERRIT materials

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background image

98

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

DC magnetic bias

measured on ETD cores

(

d

0.25 mT, f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

DC magnetic bias

measured on ETD cores

(

d

0.25 mT, f = 10 kHz, T = 100 °C)

B

B

N97

SIFERRIT materials

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background image

99

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Relative core losses

versus AC field flux density

(measured on R34 toroids)

Relative core losses

versus frequency

(measured on R34 toroids)

Relative core losses

versus temperature

(measured on R34 toroids)

N97

SIFERRIT materials

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100

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Complex permeability

versus frequency

(measured on R34 toroids, 

d

0.25 mT)

Amplitude permeability 

versus AC field flux density

(measured on R34 toroids, f < 10kHz)

Initial Permeability 

P

i

versus temperature

(measured on R34 toroid 

d

0.25 mT)

B

B

PC47

SIFERRIT materials

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background image

101

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Dynamic magnetization curves 

(typical values)

(f =  10 kHz, T = 25 °C)

Dynamic magnetization curves 

(typical values)

(f =  10 kHz, T = 100 °C)

PC47

SIFERRIT materials

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102

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Relative core losses 

versus AC field flux density

(measured on R34 toroids)

Relative core losses 

versus frequency

(measured on R34 toroids)

Relative core losses 

versus temperature

(R34 toroids, f = 100 kHz)

PC47

SIFERRIT materials

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background image

103

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Complex permeability

versus frequency

(measured on R10 toroids, 

d

0.25 mT)

Variation of initial permeability

with temperature

(measured on R16 toroids, 

d

0.25 mT)

Initial permeability 

P

i

versus temperature

(measured on R16 toroids, 

d

0.25 mT)

Relative loss factor

versus frequency

(measured on R16 toroids, 

d

0.25 mT)

B

B

B

B

T35

Specific data for T35

SIFERRIT materials

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background image

104

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

DC magnetic bias

(measured on RM cores, typical values)

(

d

0.25 mT, f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

B

T35

SIFERRIT materials

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105

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

T36

SIFERRIT materials

Complex permeability

versus frequency

(measured on R22 toroids, 

d

0.25 mT)

Variation of initial permeability

with temperature

(measured on R22 toroids, 

d

0.25 mT)

Initial permeability 

P

i

versus temperature

(measured on R22 toroids, 

d

0.25 mT)

Relative loss factor

versus frequency

(measured on R22 toroids, 

d

0.25 mT)

B

B

B

B

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106

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

T36

SIFERRIT materials

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

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107

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

T37

Specific data for T37

SIFERRIT materials

Complex permeability

versus frequency

(measured on R16 toroids, 

d

0.25 mT)

Variation of initial permeability

with temperature

(measured on R22 toroids, 

d

0.25 mT)

Initial permeability 

P

i

versus temperature

(measured on R22 toroids, 

d

0.25 mT)

Relative loss factor

versus frequency

(measured on R16 toroids, 

d

0.25 mT)

B

B

B

B

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108

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

T37

SIFERRIT materials

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

DC magnetic bias

(measured on RM cores, typical values)

(

d

0.25 mT, f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

B

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109

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

T38

Specific data for T38

SIFERRIT materials

Complex permeability

versus frequency

(measured on R10 toroids,

d

0.25 mT)

Variation of initial permeability

with temperature

(measured on R10 toroids, 

d

0.25 mT)

Initial permeability 

P

i

versus temperature

(measured on R10 toroids, 

d

0.25 mT)

Relative loss factor

versus frequency

(measured on R10 toroids, 

d

0.25 mT)

B

B

B

B

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110

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

T38

SIFERRIT materials

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

DC magnetic bias

(measured on RM cores, typical values)

(

d

0.25 mT, f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

B

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111

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

T46

Specific data for T46

SIFERRIT materials

Complex permeability

versus frequency

(measured on R9.5 toroids, 

d

0.25 mT)

Variation of initial permeability

with temperature

(measured on R9.5 toroids, 

d

0.25 mT)

Initial permeability 

P

i

versus temperature

(measured on R9.5 toroids, 

d

0.25 mT)

Relative loss factor

versus frequency

(measured on R9.5 toroids, 

d

0.25 mT)

B

B

B

B

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112

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

T46

SIFERRIT materials

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

DC magnetic bias

(measured on RM cores, typical values)

(

d

0.25 mT, f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

B

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background image

113

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

T57

Specific data for T57

SIFERRIT materials

Complex permeability

versus frequency

(measured on R17 toroids,

d

0.25 mT)

Variation of initial permeability

with temperature

(measured on R17 toroids, 

d

0.25 mT)

Initial permeability 

P

i

versus temperature

(measured on R17 toroids, 

d

0.25 mT)

Relative loss factor

versus frequency

(measured on R17 toroids, 

d

0.25 mT)

B

B

B

B

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04/13

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

T57

SIFERRIT materials

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

Reversible permeability versus temperature

(measured on toroids at f = 100 kHz,

H

DC

 = 27.5 A/m, 

 

6 mT)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

B

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04/13

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

T65

Specific data for T65

SIFERRIT materials

Complex permeability

versus frequency

(measured on R29 toroids, 

d

0.25 mT)

Variation of initial permeability

with temperature

(measured on R29 toroids, 

d

0.25 mT)

Initial permeability 

P

i

versus temperature

(measured on R29 toroids, 

d

0.25 mT)

Relative loss factor

versus frequency

(measured on R29 toroids, 

d

0.25 mT)

B

B

B

B

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116

04/13

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

T65

SIFERRIT materials

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

DC magnetic bias

(measured on RM cores, typical values)

(

d

0.25 mT, f = 10 kHz, T = 25 °C)

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 100 °C)

B

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04/13

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

T66

Specific data for T66

SIFERRIT materials

Complex permeability

versus frequency

(measured on R9.5 toroids, 

d

0.25 mT)

Variation of initial permeability

with temperature

(measured on R9.5 toroids, 

d

0.25 mT)

Initial permeability 

P

i

versus temperature

(measured on R9.5 toroids, 

d

0.25 mT)

Relative loss factor

versus frequency

(measured on R9.5 toroids, 

d

0.25 mT)

B

B

B

B

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118

04/13

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

T66

SIFERRIT materials

Dynamic magnetization curves

(typical values)

(f = 10 kHz, T = 25 °C)

DC magnetic bias

(measured on RM cores, typical values)

(

d

0.25 mT, f = 10 kHz, T = 25 °C)

B

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119

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Plastic materials

5

Plastic materials, manufacturers and UL numbers

RM coil formers of thermosetting plastic, color code white (molded-in pins):

Bakelite UP 3420

®

>

E61040 (M)

@

, HEXION SPECIALTY CHEMICALS GMBH

RM, EP, EFD and PQ coil formers of thermosetting plastic, color code black (post-inserted pins): 
Sumikon PM 9630

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Sumikon PM 9820

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

RM, EP and EFD coil formers of thermosetting plastic, color code green (post-inserted pins): 
Vyncolit/X611

®

>

E167521 (M)

@

, VYNCOLIT NV

RM power, P, PS, PM, E, ETD, ER coil formers

and terminal carriers P9

u

5, P11

u

7, P36

u

22 (Polyterephthalate):

Valox 420-SE0

®

>

E45329 (M)

@

, SABIC INNOVATIVE  PLASTICS

Valox 420-SE0

®

>

E207780 (M)

@

, SABIC INNOVATIVE  PLASTICS

Valox 420-SE0

®

>

E121562 (M)

@

, SABIC INNOVATIVE  PLASTICS

Durethan BKV 30H, [E 245249 (M)], LANXESS AG

Ultramid A3X2G5 [E41871 (M)], BASF AKTIENGESELLSCHAFT

Ultramid A3X2G7 [E41871 (M)], BASF AKTIENGESELLSCHAFT

Ultradur 4090G6 [E41871 (M)], BASF SE

Crastin SK 645 FR 

>

E41938 (M)

@

, E I DUPONT DE NEMOURS & CO INC

Pocan B4235

®

>

E245249 (M)

@

, LANXESS AG

Rynite FR 530

®

>

E41938 (M)

@

, E I DUPONT DE NEMOURS & CO INC

Terminal carriers P14

u

8, P18

u

11, P26

u

16, P30

u

19 (Polyterephthalate):

Pocan B4235

®

>

E245249 (M)

@

, LANXESS AG

PM114 coil former and terminal carrier P7

u

4 (PPS):

Ryton R-4, 

>

E54700 (M)

@

, CHEVRON PHILLIPS CHEMICAL CO L P

Ryton R-4, 

>

E233198 (M)

@

, CHEVRON PHILLIPS CHEMICAL CO L P

SMD coil formers (Liquid cristal polymer):

Sumika Super E4008

®

>

E54705 (M)

@

, SUMITOMO CHEMICAL CO LTD

Zenite 7130

®

>

E344082 (M)

@

, TICONA

Vectra C 130 

>

E106764 (M)

@

, POLYPLASTICS CO LTD

Vectra E 130i 

>

E106764 (M)

@

, POLYPLASTICS CO LTD

Vectra E 130i 

>

E83005 (M)

@

, TICONA

Stanyl TW250F6 

>

E47960 (M)

@

, DSM ENGINEERING PLASTICS B V

Insulating washers:

Makrofol FR7-2, 

>

E118859 (M)

@

, BAYER MATERIALSCIENCE AG

Aryphan F685, 

>

E167358 (M)

@

, LOFO HIGH TECH FILM GMBH

Adjusting screws and threaded sleeves:

Pocan B3235

®

>

E245249 (M)

@

, LANXESS AG

Rilsan BZM30, [E45228 (M)], ARKEMA SA (for threaded sleeves)

PQ coil formers:

Phenolic T375 J 

>

E59481 (M)

@

, CHANG CHUN PLASTICS CO LTD

Rights to change material reserved.

Further information is given on the packing label.

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120

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

The trade names are registered trademarks of the listed manufacturers.

Further information to the UL certifications are available in the internet under http//:www.UL.com 
Here you get the newest update of the yellow card.

EPCOS is an assigned molder with the UL file no. E178263 (M).

The assigned designation is A1770.

Plastic materials

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121

04/13

General

Definitions

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1

Hysteresis

The special feature of ferromagnetic and ferrimagnetic materials is that spontaneous magnetization 
sets in below a material-specific temperature (Curie point). The elementary atomic magnets are 
then aligned in parallel within macroscopic regions. These so-called Weiss’ domains are normally 
oriented so that no magnetic effect is perceptible. But it is different when a ferromagnetic body is 
placed in a magnetic field and the flux density B as a function of the magnetic field strength H is 
measured with the aid of a test coil. Proceeding from H = 0 and B = 0, the so-called initial magneti-
zation curve is first obtained. At low levels of field strength, those domains that are favorably 
oriented to the magnetic field grow at the expense of those that are not. This produces what are 
called wall displacements. At higher field strength, whole domains overturn magnetically – this is 
the steepest part of the curve – and finally the magnetic moments are moved out of the preferred 
states given by the crystal lattice into the direction of the field until saturation is obtained, i.e. until 
all elementary magnets in the material are in the direction of the field. If H is now reduced again, the 
B curve is completely different. The relationship shown in the hysteresis loop (figure 1) is obtained.

1.1

Hysteresis loop

Magnetic field strength

Magnetic flux density

Polarization J

Figure 1

Magnetization curve

(schematic)

Figure 2

Hysteresis loops for different

excitations and materials

Initial
magnetization
curve

Initial
magnetization
curves

Commutation
curve

H

I

N

˜

l

-----------

ampere-turns

length in m

-----------------------------------

=

=

A

m

-----

B

I

A

----

magnetic flux

permeated area

------------------------------------------

=

=

Vs

m

2

-------

T(Tesla)

>

@

=

J

B

P

0

H

=

P

0

H

˜

J

B

J

|

Ÿ

«

General – Definitions

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122

04/13

General

Definitions

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

General relationship between B and H:

In a vacuum,

P

r

= 1; in ferromagnetic or ferrimagnetic materials the relation B(H) becomes nonlinear 

and the slope of the hysteresis loop 

P

r

»

1.

1.2

Basic parameters of the hysteresis loop

1.2.1

Initial magnetization curve

The initial magnetization curve describes the relationship B =

P

r

P

0

H for the first magnetization fol-

lowing a complete demagnetization. By joining the end points of all “sub-loops”, from H = 0 to 
H = H

max

, (as shown in figure 1), we obtain the so-called commutation curve (also termed normal 

or mean magnetization curve), which, for magnetically soft ferrite materials, coincides with the initial 
magnetization curve.

1.2.2

Saturation magnetization B

S

The saturation magnetization B

S

 is defined as the maximum flux density attainable in a material (i.e. 

for a very high field strength) at a given temperature; above this value B

S

, it is not possible to further 

increase B(H) by further increasing H.

Technically, B

S

is defined as the flux density at a field strength of H = 1200 A/m. As is confirmed in 

the actual magnetization curves in the chapter on “Materials”, the B(H) characteristic above 
1200 A/m remains roughly constant (applies to all ferrites with high initial permeability, i.e. where 

P t

1000).

1.2.3

Remanent flux density B

R

(H)

The remanent flux density (residual magnetization density) is a measure of the degree of residual 
magnetization in the ferrite after traversing a hysteresis loop. If the magnetic field H is subsequently 
reduced to zero, the ferrite still has a material-specific flux density B

R

z

0 (see figure 1: intersection 

with the ordinate H = 0).

1.2.4

Coercive field strength H

C

The flux density B can be reduced to zero again by applying a specific opposing field –H

C

(see figure 1: intersection with the abscissa B = 0).

The demagnetized state can be restored at any time by:

a) traversing the hysteresis loop at a high frequency and simultaneously reducing the field 

strength H to H = 0.

b) by exceeding the Curie temperature T

C

.

B

P

0

P

r

H

 

H

˜

˜

=

P

0

Magnetic field constant

=

P

0

1.257 10

6

˜

=

Vs

Am

---------

P

r

Relative permeability

=

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123

04/13

General

Definitions

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

2

Permeability

Different relative permeabilities 

P

 are defined on the basis of the hysteresis loop for the various elec-

tromagnetic applications.

2.1

Initial permeability 

P

i

The initial permeability 

P

i

 defines the relative permeability at very low excitation levels and 

constitutes the most important means of comparison for soft magnetic materials. According to 
IEC 60401-3, 

P

i

is defined using closed magnetic circuits (e.g. a closed ring-shaped cylindrical coil) 

for f

d

10 kHz, B <0.25 mT, T = 25 °C.

2.2

Effective permeability 

P

e

Most core shapes in use today do not have closed magnetic paths (only ring, double E or double-
aperture cores have closed magnetic circuits), rather the circuit consists of regions where 

P

i

z

 1 

(ferrite material) and 

P

i

 = 1 (air gap). Figure 3 shows the shape of the hysteresis loop of a circuit of 

this type.

In practice, an effective permeability

P

e

 is defined for cores with air gaps.

It should be noted, for example, that the loss factor tan

G

 and the temperature coefficient for gapped 

cores reduce in the ratio 

P

e

/

P

i

 compared to ungapped cores.

P

i

1

P

0

------

'

B

'

H

--------

˜

=

'

H

0

o

P

e

1

P

0

------

L

N

2

-------

l

A

----

¦

=

l

A

----

¦

Form factor

=

L

=

Inductance

N

=

Number of turns

Figure 3

Comparison of hysteresis loops for a core with and without an air gap

without air gap

with air gap

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124

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General

Definitions

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

The following approximation applies for an air gap s 

«

 l

e

:

s

=

Width of air gap

l

e

=

Effective magnetic path length

For more precise calculation methods, see for example E.C. Snelling, “Soft ferrites”, 2nd edition.

2.3

Apparent permeability 

P

app

The definition of 

P

app

 is particularly important for specification of the permeability for coils with tubu-

lar, cylindrical and threaded cores, since an unambiguous relationship between initial permeability 

P

i

 and effective permeability 

P

e

 is not possible on account of the high leakage inductances. The de-

sign of the winding and the spatial correlation between coil and core have a considerable influence 
on 

P

app

. A precise specification of 

P

app

 requires a precise specification of the measuring coil ar-

rangement.

2.4

Complex permeability 

P

To enable a better comparison of ferrite materials and their frequency characteristics at very low 
field strengths (in order to take into consideration the phase displacement between voltage and 
current), it is useful to introduce 

P

as a complex operator, i.e. a complex permeability 

P

, according 

to the following relationship:

P

 = 

P

s

' – j

P

s

"

where, in terms of a series equivalent circuit, (see figure 5)

P

s

' is the relative real (inductance) component of 

P

and 

P

s

" is the relative imaginary (loss) component of 

P

.

Using the complex permeability 

P

, the (complex) impedance of the coil can be calculated:

Z = j 

Z P

 L

0

where L

0

 represents the inductance of a core of permeability 

P

r

= 1, but with unchanged flux 

distribution.

(cf. also section 4.1: information on tan

G

)

P

e

P

i

1

s

l

e

----

P

i

˜

+

-----------------------

=

P

app

L

L

0

------

inductance with core

inductance without core

---------------------------------------------------------------

=

=

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General

Definitions

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Figure 4 shows the characteristic shape of the curves of 

P

s

' and

P

s

" as functions of the frequency, 

using N48 material as an example. The real component 

P

s

' is constant at low frequencies, attains 

a maximum at higher frequencies and then drops in approximately inverse proportion to f. At the 
same time, 

P

" rises steeply from a very small value at low frequencies to attain a distinct maximum 

and, past this, also drops as the frequency is further increased.

The region in which

P

' decreases sharply and where the 

P

" maximum occurs is termed the cut-off 

frequency f

cutoff

. This is inversely proportional to the initial permeability of the material (Snoek’s law).

2.5

Reversible permeability 

P

rev

In order to measure the reversible permeability 

P

rev

, a small measuring alternating field is superim-

posed on a DC field. In this case 

P

rev

 is heavily dependent on H

DC

, the core geometry and the tem-

perature.

Important application areas for DC field-superimposed, i.e. magnetically biased coils are broadband 
transformer systems (feeding currents with signal superimposition) and power engineering (shifting 
the operating point) and the area known as “nonlinear chokes” (cf. chapter on RM cores). For the 
magnetic bias curves as a function of the excitation H

DC

 see the chapter on “SIFERRIT materials”.

Figure 4 

Complex permeability versus frequency

(measured on R10 toroids, N48 material, measuring flux density ˆB

d

0.25 mT)

P

r ev

1

P

0

------

lim

'

H

0

o

˜

=

'

B

'

H

--------

©

¹

§

·

(Permeability with superimposed DC field H

DC

)

H

DC

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General

Definitions

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Important notes 

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and

Cautions and warnings 

on page 609.

2.6

Amplitude permeability 

P

a

, A

L1

 value

=

Peak value of flux density

=

Peak value of field strength

For frequencies well below cut-off frequency,

P

a

 is not frequency-dependent but there is a strong 

dependence on temperature. The amplitude permeability is an important definition quantity for pow-
er ferrites. It is defined for specific core types by means of an A

L1

 value for f 

d

10 kHz, B = 320 mT 

(or 200 mT), T = 100 °C.

P

a

B

ˆ

P

0

H

ˆ

----------

=

(Permeability at high excitation)

B
H

A

L1

P

0

P

a

˜

l

A

----

¦

----------------

=

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General

Definitions

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

3

Magnetic core shape characteristics

Permeabilities and also other magnetic parameters are generally defined as material-specific quan-
tities. For a particular core shape, however, the magnetic data are influenced to a significant extent 
by the geometry. Thus, the inductance of a slim-line ring core coil is defined as:

Due to their geometry, soft magnetic ferrite cores in the field of such a coil change the flux param-
eters in such a way that it is necessary to specify a series of effective core shape parameters in 
each data sheet. The following are defined:

l

e

Effective magnetic length

A

e

Effective magnetic cross section

A

min

Min. magnetic cross section of the core

(required to calculate the max. flux density)

V

e

 = A

e ·

 l

e

Effective magnetic volume

With the aid of these parameters, the calculation for ferrite cores with complicated shapes can be 
reduced to the considerably more simple problem of an imaginary ring core with the same magnetic 
properties. The basis for this is provided by the methods of calculation according to IEC 60205, 
which allow to calculate the effective core shape parameters of different core shapes.

3.1

Form factor

The inductance L can then be calculated as follows:

where 

P

e

 denotes the effective permeability or another permeability 

P

rev

 or 

P

a

 (or 

P

i

 for cores with a 

closed magnetic path) adapted for the B/H range in question.

3.2

Inductance factor, A

L

 value

A

L

 is the inductance referred to number of turns = 1. Therefore, for a defined number of turns N:

L = A

L

 · N

2

L

P

r

P

0

N

2

A

l

----

˜

˜

˜

=

l

A

----

¦

l

e

A

e

------

=

L

P

e

P

0

N

2

˜

˜

l

A

----

¦

------------------------------

=

A

L

L

N

2

--------

P

e

P

0

˜

l

A

----

¦

----------------

=

=

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General

Definitions

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

3.3

Tolerance code letters

The tolerances of the A

L

 are coded by the letters in the third block of the ordering code in conformity 

with IEC 62358.

The tolerance values available are given in the individual data sheets.

Code letter

Tolerance of A

L

 value

Code letter

Tolerance of A

L

 value

A

r

3%

L

r

15%

B

r

4%

M

r

20%

C

r

6%

Q

+30/–10%

D

r

8%

R

+30/–20%

E

r

7%

U

+80/–0%

H

r

12%

X

filling letter

J

r

5%

Y

+40/–30%

K

r

10%

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General

Definitions

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

4

Definition quantities in the small-signal range

4.1

Loss factor tan

G

Losses in the small-signal range are specified by the loss factor tan

G

.

Based on the impedance Z (cf. also section 2.4), the loss factor of the core in conjunction with the 
complex permeability 

P

 is defined as

where R

s

 and R

p

 denote the series and parallel resistance

and L

s

 and L

p

 the series and parallel inductance respectively.

From the relationships between series and parallel circuits we obtain:

4.2

Relative loss factor tan

G

/

P

i

In gapped cores the material loss factor tan

G

 is reduced by the factor 

P

e

/

P

i

. This results in the rela-

tive loss factor tan

G

e

 (cf. also section 2.2):

The table of material properties lists the relative loss factor tan

G

/

P

i

. This is determined to 

IEC 60401-3 at B = 0.25 mT, T = 25 °C.

G

s

tan

P

s

''

P

s

'

--------

R

s

Z

L

s

----------

=

=

G

p

tan

P

p

''

P

p

'

--------

Z

L

p

˜

R

p

--------------

=

=

and

L

s

R

s

R

p

L

p

Figure 5

Lossless series inductance L

s

 with loss 

resistance R

s

 resulting from the core losses.

Figure 6

Lossless parallel inductance L

p

 with loss 

resistance R

p

 resulting from the core losses.

P

p

'

P

s

'

1

G

tan

2

+

˜

=

P

p

''

P

s

''

1

1

tan

G

------------

©

¹

§

·

2

+

©

¹

§

·

˜

=

G

e

tan

G

tan

P

i

-------------

P

e

˜

=

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Definitions

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

4.3

Quality factor Q

The ratio of reactance to total resistance of an induction coil is known as the quality factor Q.

The total quality factor Q is the reciprocal of the total loss factor tan

G

 of the coil; it is dependent on 

the frequency, inductance, temperature, winding wire and permeability of the core.

4.4

Hysteresis loss resistance R

h

 and hysteresis material constant 

K

B

In transformers, in particular, the user cannot always be content with very low saturation. The user 
requires details of the losses which occur at higher saturation, e.g. where the hysteresis loop begins 
to open.

Since this hysteresis loss resistance R

h

 can rise sharply in different flux density ranges and at 

different frequencies, it is measured to IEC 60401-3 for 

P

i

 values greater than 500 at B

1

= 1.5 

and B

2

= 3 mT  (

'

B = 1.5 mT), a frequency of 10 kHz and a temperature of 25 °C (for

P

i

< 500: 

f = 100 kHz, B

1

= 0.3 mT, B

2

= 1.2 mT). The hysteresis loss factor tan

G

h

 can then be calculated 

from this.

For the hysteresis material constant 

K

B

we obtain:

The hysteresis material constant, 

K

B

, characterizes the material-specific hysteresis losses and is a 

quantity independent of the air gap in a magnetic circuit.

The hysteresis loss factor of an inductor can be reduced, at a constant flux density, by means of an 
(additional) air gap

For further details on the measurement techniques see IEC 62044-2.

Q

Z

L

R

L

-------

reactance

total resistance

----------------------------------------

=

=

G

tan

h

R

h

Z

L

˜

-----------

G

B

2

 

tan

G

B

1

 

tan

=

=

K

B

G

h

tan

P

e

'

B

ˆ

˜

-------------------

=

G

h

tan

K

B

'

B

ˆ

P

e

˜

˜

=

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Definitions

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

5

Definition quantities in the high-excitation range

While in the small-signal range (H 

d

 H

c

), i.e. in filter and broadband applications, the hysteresis loop 

is generally traversed only in lancet form (figure 2), for power applications the hysteresis loop is driv-
en partly into saturation. The defining quantities are then

P

rev

= reversible permeability in the case of superimposition with a DC signal

(operating point for power transformers)

P

a

= amplitude permeability and

P

V

= core losses.

5.1

Core losses P

V

The losses of a ferrite core or core set P

V

 is proportional to the area of the hysteresis loop in ques-

tion. It can be divided into three components:

Owing to the high specific resistance of ferrite materials, the eddy current losses in the frequency 
range common today (1 kHz to 2 MHz) may be practically disregarded except in the case of core 
shapes having a large cross-sectional area.

The power loss P

V

 is a function of the temperature T, the frequency f, the flux density B and is of 

course dependent on ferrite material and core shape.

The temperature dependence can generally be approximated by means of a third-order polynomial, 
while

applies for the frequency dependence and

for the flux density dependence. The coefficients x and y are dependent on core shape and mate-
rial, and there is a mutual dependence between the coefficients of the definition quantity (e.g. T) 
and the relevant parameter set (e.g. f, B).

In the case of cores which are suitable for power applications, the total core losses P

V

 are given 

explicitly for a specific frequency f, flux density B and temperature T in the relevant data sheets.

When determining the total power loss for an inductive component, the winding losses must also be 
taken into consideration in addition to the core-specific losses.

where, in addition to insulation conditions in the given frequency range, skin effect and proximity 
effect must also be taken into consideration for the winding.

P

V

P

V, hysteresis

P

V, eddycurrent

P

V, residual

+

+

=

P

V

f

 

f

1

x

+

a

0

x

1

d d

P

V

B

 

B

2

y

+

a

0

y

1

d d

P

V, tot

P

V, core

P

V, winding

+

=

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

5.2

Performance factor (PF = f · B

max

)

The performance factor is a measure of the maximum power which a ferrite can transmit, whereby 
it is generally assumed that the loss does not exceed 300 kW/m

3

. Heat dissipation values of this 

order are usually assumed when designing small and medium-sized transformers. Increasing the 
performance factor will either enable an increase of the power that can be transformed by a core of 
identical design, or a reduction in component size if the transformed power is not increased.

If the performance factors of different power transformer materials are plotted as a function of fre-
quency, only slight differences are observed at low frequencies (< 300 kHz), but these differences 
become more pronounced with increasing frequency. This diagram can be used to determine the 
optimum material for a given frequency range (for diagram see page 49).

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Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

6

Influence of temperature

6.1

P

(T) curve, Curie temperature T

C

The initial permeability 

P

i

as a function of T is given for all materials (see chapter on SIFERRIT ma-

terials). Important parameters for a 

P

(T) curve are the position of the 

s

econdary 

p

ermeability 

m

ax-

imum (SPM) and the Curie temperature. Minimum losses occur at the SPM temperature.

Above the Curie temperature T

C

 ferrite materials lose their ferrimagnetic properties, i.e. 

P

i

 drops to 

P

i

= 1. This means that the parallel alignment of the elementary magnets (spontaneous magnetiza-

tion) is destroyed by increasing thermal activation. This phenomenon is reversible, i.e. when the 
temperature is reduced below T

C

 again, the ferrimagnetic properties are restored.

The Curie tempertature T

C

 is defined as the cross of the straight line between 80% and 20% of L

max

with the temperature axes (figure 7).

6.2

Temperature coefficient of permeability 

D

By definition the temperature coefficient 

D

 represents a straight line of average gradient between 

the reference temperatures T

1

 and T

2

. If the 

P

(T) curve is approximately linear in this temperature 

range, this is a good approximation; in the case of heavily pronounced maxima, as occur particularly 
with highly permeable broadband ferrites, however, this is less true. The following applies:

P

i1

=

 Initial permeability 

P

i

at T

1

= 25 °C

P

i2

=

 The initial permeability 

P

i

 associated with the temperature T

2

6.3

Relative temperature coefficient 

D

F

In a magnetic circuit with an air gap and the effective permeability 

P

e

 the temperature coefficient is 

reduced by the factor 

P

e

/

P

i

 (cf. also section 2.2).

Figure 7

Definition of Curie temperature

D

P

i2

P

i1

P

i 1

---------------------

1

T

2

T

1

------------------

˜

=

D

F

D

P

i

----

P

i2

P

i1

P

i 2

P

˜

i1

---------------------

1

T

2

T

1

------------------

˜

=

=

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

6.4

Permeability factor

The first factor in the equation for determining the relative temperature coefficient 

 is known 

as the permeability factor.

In the case of SIFERRIT materials for resonant circuits, the temperature dependence of the perme-
ability factor can be seen from the relevant diagram.

6.5

Effective temperature coefficient 

D

e

In the case of the ferrite materials for filter applications, the 

D

/

P

i

 values for the ranges 25 to 55 °C 

and 5 to 25 °C are given in the table of material properties.

The effective permeability 

P

e

 is required in order to calculate 

D

e

; therefore this is given for each core 

in the individual data sheets.

6.6

Relationship between the change in inductance and the permeability factor

The relative change in inductance between two temperature points can be calculated as follows:

6.7

Temperature dependence of saturation magnetization

The saturation magnetization B

S

 drops monotonically with temperature and at T

C

 has fallen to 

B

S

= 0 mT. The drop for B

S

(25 °C) and B

S

(100 °C), i.e. the main area of application for the ferrites, 

can be taken from the table of material properties.

6.8

Temperature dependence of saturation-dependent permeability
(amplitude permeability)

It can be seen from the 

P

a

(B) curves for the different materials that 

P

a

 exhibits a more pronounced 

maximum with increasing temperature and drops off sooner on account of decreasing saturation.

P

i 2

P

i 1

P

i 2

P

˜

i 1

---------------------

D

e

P

e

P

i

------

D

˜

=

L

2

L

1

L

1

------------------

D

P

i

----

T

2

T

1

 P

e

˜

˜

=

L

2

L

1

L

1

------------------

P

i2

P

i1

P

i2

P

˜

i 1

---------------------

P

e

=

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

7

Disaccommodation

Ferrimagnetic states of equilibrium can be influenced by mechanical, thermal or magnetic changes 
(shocks). Generally, an increase in permeability occurs when a greater mobility of individual mag-
netic domains is attained through the external application of energy. This state is not temporally sta-
ble and returns logarithmically with time to the original state.

7.1

Disaccommodation coefficient d

P

i1

=

 Permeability at time t

1

P

i2

=

 Permeability at time t

2

and t

2

> t

1

7.2

Disaccommodation factor DF

Accordingly, a change in inductance can be calculated with the aid of DF:

d

P

i 1

P

i 2

P

i 1

lgt

2

lgt

1

˜

-----------------------------------------

=

D F

d

P

i1

-------

=

L

1

L

2

L

1

------------------

D F

P

e

t

2

t

1

----

log

˜

˜

=

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Important notes 

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and

Cautions and warnings 

on page 609.

8

General mechanical, thermal, electrical and magnetic properties of ferrites

Typical figures for the mechanical and thermal properties of ferrites

8.1

Mechanical properties

Ferrite cores have to meet mechanical requirements during assembling and for a growing number 
of applications. Since ferrites are ceramic materials one has to be aware of the special behavior 
under mechanical load.

As valid for any ceramic material, ferrite cores are brittle and sensitive to any shock, fast changing 
or tensile load. Especially high cooling rates under ultrasonic cleaning and high static or cyclic loads 
can cause cracks or failure of the ferrite cores.

Tensile strength

approx. 30 N/mm

2

Compressive strength

approx. 800 N/mm

2

Vickers hardness HV

15

approx. 600 N/mm

2

Modulus of elasticity

approx. 150000 N/mm

2

Fracture toughness K

1c

approx. 0.8 … 1.1 MPam

1/2

Thermal conductivity

approx. 4 … 7·10

-3

 J/mm·s·K

Coefficient of linear expansion

approx. 7 … 10 ·10

-6

 1/K

Specific heat

approx. 0.7 J/g·K

Figure 8

Weibull plot of fracture strength values of the materials T38 and N87

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Important notes 

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and

Cautions and warnings 

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There are two modes of crack growth: fast (critical) or slow (subcritical) crack propagation. In the 
first case spontaneous breakdown occurs. In the second case the crack propagates slowly during 
static or cycling loading, and then the sample can only fail if a critical crack length is achieved. 
According to the linear elastic fracture mechanics these two mechanisms could be described in 
terms of stress intensity factors. For life time predictions the knowledge of subcritical crack growth 
and R- (respectively K

R

–) curve behavior of the material is essential.

The reduction of the material strength by temperature induced propagating microstructural cracks 
can be described as follows:

V

Effective strength

D

Coefficient of thermal expansion (7 to 12 · 10

-6

 1/K)

E

0

Modulus of elasticity

N

Number of temperature changes

l

Crack length

The brittleness of ferrite materials can be quantified by means of the fracture toughness. High frac-
ture toughness values indicate decreased material brittleness. The quantity of the fracture tough-
ness is a measure for the stress in the core necessary for a propagating crack. For the crack prop-
agation it is required that the stress intensity factor exceeds the fracture toughness.

K

1

Stress intensity facture

K

1C

Fracture toughness

V

appl

Applied stress

Y

Factor for fracture/sample geometry

G

C

Critical fracture area energy

E

Modulus of elasticity

Typical fracture toughness values are approx. 0.8 to 1.1 MPam

1/2

.

Ferrite materials have a pronounced R curve behavior, i. e. the fracture toughness increases with 
propagating crack length. In practice there is a rather tolerant behavior towards moderate single 
stress events.

8.2

Stress sensitivity of magnetic properties

Stresses in the core affect not only the mechanical but also the magnetic properties. It is apparent 
that the initial permeability is dependent on the stress state of the core. With

where 

P

io

 is the initial permeability of the unstressed material, it can be shown that the higher the 

stresses are in the core, the lower is the value for the initial permeability. Embedding the ferrite 
cores (e.g. in plastic) can induce these stresses. A permeability reduction of up to 50% and more 

V

D

T

E

0

1

2

S

N l

2

+

--------------------------

'

˜

=

K

1

K

1C

t

with

K

1

V

appl

l Y

˜

=

and

K

1C

G

C

E

=

P

i

1

1

P

io

-------

k

V

T

˜

+

---------------------------- ;

#

k

30 10

6

1

M Pa

-------------

˜

˜

|

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Cautions and warnings 

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can be observed, depending on the material. In this case, the embedding medium should have the 
greatest possible elasticity.

8.3

Magnetostriction

Linear magnetostriction is defined as the relative change in length of a magnetic core under the in-
fluence of a magnetic field. The greatest relative variation in length 

O

 = 

'

l/l occurs at saturation mag-

netization. The values of the saturation magnetostriction (

O

s

) of our ferrite materials are given in the 

following table (negative values denote contraction).

Magnetostrictive effects are of significance principally when a coil is operated in the frequency 
range <20 kHz and then undesired audible frequency effects (distortion etc.) occur.

8.4

Resistance to radiation

SIFERRIT materials can be exposed to the following radiation without significant variation 
(

'

L/L

d

1% for ungapped cores):

gamma quanta:

10

9

 rad

quick neutrons

2 · 10

20

 neutrons/m

2

thermal neutrons

2 · 10

22

 neutrons/m

2

8.5

Resistivity 

U

, dielectric constant 

H

At room temperature, ferrites have a resistivity in the range 1

:

m to 10

5

:

m; this value is usually 

higher at the grain boundaries than in the grain interior. The temperature dependence of the core 
resistivity corresponds to that of a semiconductor:

E

a

Activation energy (0.1 to 0.5 eV)

k

Boltzmann constant

T

Absolute temperature

>

K

@

Thus the resistivity at 100 °C is one order of magnitude less than at 25 °C, which is significant, par-
ticularly in power applications, for the magnitude of the eddy-current losses.

Similarly, the resistivity decreases with increasing frequency.

SIFFERIT

material

K1

N48

O

s

 in 10

–6

–18

–1.5

U

e

E

a

k T

˜

-----------

a

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139

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General

Definitions

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Example: Material N48

The different resistivity values for grain interior and grain boundary result in high (apparent) dielec-
tric constants 

H

 at low frequencies. The dielectric constant 

H

 for all ferrites falls to values around 

10 to 20 at very high frequencies. NiZn ferrites already reach this value range at frequencies around 
100 kHz.

Magnetostrictive effects are of significance principally when a coil is operated in the frequency 
range <20 kHz and then undesired audible frequency effects occur.

SIFFERIT

material

Resistivity

(approx.)

:

m

Dielectric constant 

H

 at (approximate values)

10 kHz

100 kHz 

1 MHz

100 MHz

300 MHz

K1 (NiZn)

N48 (MnZn)

10

5

1

30

140 

·

10

3

15

115 

·

10

3

12

80 

·

10

3

11

11

Figure 9

Resistivity and dielectric constant versus frequency

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General

Definitions

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

9

Coil characteristics

Resistance factor A

R

The resistance factor A

R

, or A

R

 value, is the DC resistance R

Cu

 per unit turn, analogous to the A

L

value.

When the A

R

 value and number of turns N are given, the DC resistance can be calculated from 

R

CU

= A

R

N

2

.

From the winding data etc. the A

R

 value can be calculated as follows:

where

U

= resistivity (for copper: 17.2

P:

mm), I

N

= average length of turn in mm, A

N

= cross sec-

tion of winding in mm

2

, f

Cu

= copper space factor. If these units are used in the equation, the A

R

value is obtained in 

P:

 = 10

-6

:

. For calculation of I

N

 and A

N

 the middle dimensions are used.

For coil formers, A

R

 values are given in addition to A

N

 and l

N

. They are based on a copper filling 

factor of f

Cu

= 0.5. This permits the A

R

 value to be calculated for any filling factor f

Cu

:

For rough estimation a copper filling factor of f

Cu

 = 0.5 is sufficient.

A

R

R

Cu

N

2

----------

=

A

R

U

I

N

˜

f

Cu

A

N

˜

-------------------

=

A

R f

C u

A

R 0 5

0.5
f

Cu

--------

˜

=

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Application notes

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1

Cores for filter applications

1.1

Gapped cores for filter/resonant circuits

Gapped cores are therefore always used in high quality circuits (for materials see application 
survey, page 34).

In the case of small air gaps (max. 0.2 mm) the air gap can be ground into only one core half. In this 
case the half with the ground air gap bears the stamp. The other half is blank.

The air gap enables the losses in the small-signal area and the temperature coefficient to be re-
duced by a factor of 

P

e

/

P

i

 in the small-signal area. More important, however, is that close A

L

 value 

tolerances can be achieved.

The rated A

L

 values for cores with ground air gap can be obtained from the individual data sheets. 

The data for the individual cores also include the effective permeability 

P

e

 used to approximately 

determine the effective loss factor tan

G

e

 and the temperature coefficient of the effective permeabil-

ity 

D

e

from the ring core characteristics (see table of material properties).

It should be noted at this point that in cores with a larger air gap the stray field in the immediate 
vicinity of the air gap can cause additional eddy current losses in the copper winding. If the coil qual-
ity must meet stringent requirements, it is therefore advisable to wind several layers of polystyrene, 
nylon tape or even FPC film under the wire in the part of the winding that is in the proximity of the 
air gap; with a 3-section coil former this would be the part of the center section near the air gap.

Basic requirements:

Low tan 

G

Close tolerance for A

L

 value

Close tolerance for temperature coefficient

Low disaccommodation factor DF

Wide adjustment range

C

L

Figure 10

Schematic drawing showing the construction of 
a P or RM core set with a total air gap s, com-
prising 2 core halves (1 and 2), threaded part (3) 
and padded winding (4)

Filter applications

Application notes

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1.2

P and RM cores with threaded sleeves

Most of P and RM cores are supplied with a glued-in threaded sleeve. EPCOS uses automatic 
machines featuring high reliability in dosing of the adhesive and in positioning the threaded sleeve 
in the core.

The tight fit of the threaded sleeve is regularly checked – including a humid atmosphere of 
40 °C/93% r.h. (to IEC 60068-2-3-78) over 4 days – and also by periodic tests over 3 weeks. The 
usual bonding strengths of 20 N for 

‡

2 mm holes (e.g. for RM 5) and 30 N for 

‡

3 mm holes (e.g. 

for P 14

u

11, RM 6) are greatly exceeded, reaching an average of > 100 N. The threaded sleeve is 

continuously checked for proper centering. Overall, the controlled automated procedure guarantees 
higher reliability than manual gluing with its unavoidable inadequacies. Owing to the porosity of the 
ferrite, tension of the ferrite structure due to hardened adhesive that has penetrated cannot always 
be avoided. Hence, the relative temperature coefficient 

D

F

 may be increased by approximately 

0.2

·

10

-6

/K.

1.3

Typical calculation of a resonant circuit inductor

The following example serves to illustrate the dependencies to be considered when designing a 
resonant circuit inductor:

A SIFERRIT pot core inductor is required with an inductance of L = 640

P

H and a minimum quality 

factor Q = 400 (tan 

G

L

= 1/Q = 2.5

·

10

-3

) for a frequency of 500 kHz. The temperature coefficient 

D

e

of this inductor should be 100

·

10

-6

/K in the temperature range +5 to +55 °C.

a) Choice of material

According to the table of material properties and the tan

G

/

P

i

 curves (see chapter “SIFERRIT 

materials”) the material M33, for example, can be used for 500 kHz.

b) Choice of A

L

 value

The Q and temperature coefficient requirements demand a gapped pot core. The relative 
temperature coefficient 

D

F

 of SIFERRIT M33 according to the table of material properties is on 

average about 1,6

·

10

-6

/K. Since the required 

D

e

 value of the gapped P core should be about 

100

·

10

-6

/K, the effective permeability is

With pot core P 18

u

11 (B65651): 

P

e

= 47.9 for A

L

= 100 nH.

With pot core P 22

u

13 (B65661): 

P

e

= 39.8 for A

L

= 100 nH.

c) Choice of winding material

RF litz wire 20

u

0.05 with single natural silk covering is particularly suitable for frequencies around 

500 kHz. The overall diameter of the wire including insulation of 0.367 mm and the average 
resistivity of 0.444

:

/m are obtained from the litz-wire table (refer to pertinent standard). It is 

recommended that the actual overall diameter always be measured, and this value used for the 
calculation.

D

F

D

e

P

e

------

=

P

e

D

e

D P

i

e

------------

100 10

6

˜

K

e

1

1.6 10

6

˜

K

e

----------------------------------

˜

62.5

=

=

=

Ÿ

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

d) Number of turns and type of core

For an A

L

 value of 100 nH and an inductance of 640

P

H the equation N = (L/A

L

)

1/2

 yields 80 turns. 

The nomogram for coil formers on page 175 shows that for a wire with an external diameter of 
0.367 mm the two-section coil former for core type P 18

u

11 can easily take 80 turns. This core type 

can therefore be used with a one-section coil former.

e) Length of wire and DC resistance

The length of an average turn l

N

 on the above former is 35.6 mm. The length of litz wire necessary 

for the coil is therefore 80

·

35.6 mm = 2848 mm plus say 2

·

10 cm for the connections, giving a total 

length of 3.04 m. The average resistivity of this wire is 0.444

:

/m; the total DC resistance is thus 

3.04 m

·

0,444

:

/m

|

1,35

:

. It should be noted that the length of an average turn l

N

 given in the 

individual data sheets always refers to the fully wound former. If the former is not fully wound, the 
length of an average turn must be corrected according to the extent of the winding.

f)  Checking the temperature coefficient

The core P 18

u

11 with A

L

 = 100 nH has an effective permeability 

P

e

= 47.9. SIFERRIT M33 has a 

relative temperature coefficient 

D

F

|

1.6 · 10

-6

/K; therefore the following temperature coefficient can 

be calculated

Actual measurement yielded 90 · 10

-6

/K.

It should be pointed out that with pot cores the temperature coefficient of the unwound coil has 
almost no influence since the flux density lies primarily in the core.

For effective permeabilities 

P

e

<80, however, due to the influence of the winding an additional 

temperature coefficient of approx. (10 to 30) · 10

-6

/K must be included in the calculation.

D

e

P

e

D

F

˜

47.9 1.6 10

6

K

e

˜

˜

76.6 10

6

K

e

˜

=

=

=

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

2

Cores for broadband transformers

2.1

Precision-ground, ungapped cores for broadband transformers

For fields of application such as matching transformers in digital telecommunication networks or 
pulse signal transformers, either cores which form a closed magnetic circuit (toroids, double E or 
double-aperture cores) or paired core sets without air gap are used. In order to achieve the highest 
possible effective permeability here, these cores are precision ground with residual air gaps 
s ~ 1

P

m. By selecting the low-profile core types, the A

L

 value can be further increased, and the 

number of turns reduced.

For this reason, RM and pot cores made of materials N30, T38, T46 and T66 are especially suitable 
for these applications. For high-frequency applications, N22, M33 and K1 are suitable.

2.2

Fundamentals for broadband transformers in the range 10 kHz to over 1 GHz – an 
example

Broadband transformers are constructed primarily using closed core shapes, i.e. toroids and 
double-aperture cores. Divided core designs such as P/RM cores or small E/ER cores, which allow 
more simple winding, are particularly suitable for transformers up to approximately 200 MHz.

The bandwidth 

'

f = f

oG

– f

uG

 (f

oG

= upper cut-off frequency, f

uG

= lower cut-off frequency) is 

considered the most important transformer characteristic.

Cut-off frequency: Frequency at which the voltage at the transformer drops by 3 dB ( –30%)

The following holds true for circuit quality Q >10 (typical value):

f

r

=

Resonance frequency

R

i

=

Internal resistance of generator (normally, R

i

 << loss resistance of ferrite)

L

H

=

Main inductance

C

0

=

Winding capacitance

General requirements:

High A

L

 values (  high effective permeability) to 

restrict number of turns

Good broadband properties, i.e. high imped-
ance up to highest possible frequencies

Low total harmonic distortion (  low hysteresis 
material constant 

K

B

)

Low sensitivity to superimposed DC currents 
(  highest possible values for T

C

 and B

S

)

Low tan 

G

 for high-frequency applications

f

'

f

r

R

i

-----

L

H

C

0

-------

˜

=

Broadband transformers

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Application notes

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Transmission loss curve:

Example: 1 : 1 transformer based on E6.3/T38 with 2

u

10 turns

2.3

Low-distortion transformers for digital data transmission (ISDN, xDSL)

The digital transmission technologies over copper like ISDN, HDSL (high-rate digital subscriber 
line) and ADSL (asymmetric digital subscriber line) require very small harmonic distortion in order 
to maintain maximal line length. This requirement can be calculated from material parameters for 
the third harmonic distortion with the Rayleigh model for small-signal hysteresis (sinusoidal current).

For a typical design a transformer has to be matched to a chipset via the turn ratios N1 : N2 : N3 …, 
the inductances L

1

, L

2

, L

3

 … and the maximum DC resistances R

1

, R

2

, R

3

 … 

D

ln

U

U

r

------

=

U

r

=

Voltage at f

r

D

=

Attenuation when matched with line

impedance (e.g. 50 

:

)

Figure 11

Transmission loss curve for transformer E6.3/T38 with 2

u

10 turns (parallel)

0.6

P

e

K

B

B

ˆ

˜

˜

˜

=

k

3

u

3

u

1

------

0.6

G

h

tan

˜

=

=

Broadband transformers

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Application notes

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

The third harmonic distortion for winding j can then be calculated as

This equation shows the contribution of the various design parameters:

– The material is characterized by the hysteresis material constant 

K

B

. Limit values for this 

parameter are given in the SIFERRIT material tables. The actual level for 

K

B

 varies for different 

cores. In order to select the best material for an application, the normalized temperature depen-
dence 

K

B

(T)/

K

B

(25

q

C) is of great help (cf. graph on page 50). Being mainly composition-depen-

dent, these curves are thus material-specific.

– The geometry can be taken into account by a core distortion factor (CDF) defined as

The factor 

6

l

i

/l

e

 is the closer to 1, the less the core section varies along the magnetic path (homo-

geneous core shape). The values for CDF are given in the following table for the core shapes 
preferred for these applications.

Cores w/o hole CDF (mm

 -4.5

)

Cores w. hole

CDF (mm

 -4.5

)

EP cores

CDF (mm

 -4.5

)

P 9 

u

 5

1.25

P 3.3 

u

 2.6

85.9

EP 5

10.6

P 11 

u

 7

0.644

P 4.6 

u

 4.1

46.7

EP 6

9.99

P 14 

u

 8

0.164

P 7 

u

 4

4.21

EP 7

1.68

P 18 

u

 11

0.0470

P 9 

u

 5

1.72

EPX 7/9

0.749

P 22 

u

 13

0.0171

P 11 

u

 7

0.790

EPX 9/9

0.457

P 26 

u

 16

0.00723

P 14 

u

 8

0.217

EP 10

0.506

P 30 

u

 19

0.00311

P 18 

u

 11

0.0545

EPX 10

0.329

P 36 

u

 22

0.00149

P 22 

u

 13

0.0220

EP 13

0.191

RM 4

0.498

P 26 

u

 16

0.0099

EPO 13

0.172

RM 5

0.184

P 30 

u

 19

0.00366

EP 17

0.0619

RM 6

0.0576

P 36 

u

 22

0.00166

EP 20

0.00945

RM 7

0.0339

P 41 

u

 25

0.00112

EFD 10

3.919

RM 8

0.0162

RM 4

0.814

EFD 15

0.376

RM 10

0.00676

RM 5

0.243

EFD 20

0.0837

RM 12

0.00215

RM 6

0.0779

EFD 25

0.0231

RM 14

0.00100

RM 7

0.0415

EFD 30

0.0161

RM 8

0.0235

ER 9.5

2.557

RM 10

0.00906

ER 11

1.453

k

3

0.6

P

0

--------

K

B

U

ˆ

2

S

f

------------------

L

j

U

f

Cu

--------

N

j

N

1

-------

© ¹

§ ·

2

j

1

=

¦

1

R

j

-----

˜

3 2

e

˜

l

i

i

¦

l

e

-----------

l

e

A

e

2

---------

˜

l

N

3 2

e

A

N

3 2

e

------------------

˜

˜

˜

˜

˜

=

­ ® ¯

­ ® ¯

­ ° ° ° ° ° ® ° ° ° ° ° ¯

­ ° ® ° ¯

­ ® ¯

Material

Circuit

conditions

Design constraints

Core

Coil former

Geometry

CD F

l

i

¦

l

e

----------

l

e

A

e

2

---------

l

N

3 2

e

A

N

3 2

e

---------------

˜

˜

=

Broadband transformers

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Cautions and warnings 

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The values of this parameter indicate that roughly

I.e. the larger the core, the smaller is the distortion. Due to space restriction, however, the choice 
has to be made among the core shapes of a given size.

– The circuit conditions, i.e. voltage amplitude û and frequency f affect directly the flux density in 

the core. For increasing flux density, a deviation of the absolute value of k

3

 from the calculated 

test value is expected, since the tan 

G

h

 vs. ˆB curve deviates from linear.

– The distortion k

3c

 for a transformer in a circuit with given impedance conditions can be obtained 

from the following formula:

The actual circuit distortion k

3c

 will in general be smaller than the calculated sinusoidal current 

value k

3

.

CDF

1

V

e

3/2

----------

a

k

3c

k

3

1

3

Z

L

1

1

R

i

-----

N

2

N

1

-------

© ¹

§ ·

2

1

R

L

-------

˜

+

©

¹

§

·

˜

+

2

--------------------------------------------------------------------------------------

=

Figure 12

Equivalent circuit diagram for a broadband 
transformer

R

i

=

Internal resistance of generator

R

L

=

Load resistance

L

1

=

Primary inductance

Broadband transformers

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3

Cores for LAN applications

LAN (

L

ocal 

A

rea

N

etwork) is a connection of local computers in most cases inside a building. The 

transfer rate values between 10 Mbit/s and 100 Mbit/s. The transmission rates are 10 Mbit/s 
(10 Base T), 100 Mbit/s (100 Base T) and 1 Gbit/s (Gigabit Ethernet).

3.1

Signal transformers

To design the signal 1:1 transformer small toroids are typically used. Its functions are impedance 
matching and network termination. Due to space restriction the core has to be the smallest possible, 
that still meets the inductance requirement under the given working conditions (100 kHz).

The mostly used core sizes are beginning from outer/inner diameters of 2.54/1.27 mm (0.1/0.05 
inch) up to 3.94/2.24 mm (0.155/0.088 inch) with different variations of inner diameter and core 
height (refer also to chapter

 “Toroids”

, page 561 ff).

The multi-level coding of the digital waveform is not always symmetrical to the zero line. This 
imbalance results in an effective DC current, which is allowed to value 8 mA max. Therefore the 
inductance of the ferrite toroid is specified under a constant DC current of 8 mA. The saturation flux 
density values 430 mT at 25 °C and the initial permeability is 4000 (figure 13).

For indoor application the temperature range is 0 to 70 °C. To use the LAN technology also in out-
door application the temperature range needs to be extended from –40 to +85 °C without changing 
the electrical specification.

The material T57 enables design in both temperature ranges.

Figure 13

P

rev

 versus temperature, measured 

on toroid R 3.43/1.78/2.11; material 
T57 f = 100 kHz, ˆB = 6 mT, N = 26, 
H

DC

 = 27 A/m. (l

DC

 = 8 mA)

LAN applications

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3.2

Common-mode chokes

For the suppression of common-mode interference in the frequency range from about 30 MHz to 
300 MHz it is necessary to use current-compensated chokes in the LAN network.

The corresponding ferrite material is K10, which is a NiZn material with a permeability of approx. 
700 for small Parylene coated cores. The impedance versus frequency curve of K10 is ideally 
adapted to the suppression requirement in the LAN network (figure 14).

3.3

Coating to ensure highest insulation resistance

Typically the toroid has to withstand 1 kV Hipot test. Therefore the toroids needs to be coated with 
Parylene which ensures highest insulation resistance. With 12.5

P

m (0.0005 inch) a breakdown 

voltage of 2.7 kV can be achieved. The coating will also protect the wire during winding operation. 
The material data sheet specifies a breakdown voltage of 2.7 kV, if coated 12.5 

P

m.

Figure 14

Normalized impedance curve, measured 
on toroid R 10 (N = 2 turns)

LAN applications

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4

Cores for EMI applications

4.1

Ring cores to suppress line interference

With the ever-increasing use of electrical and electronic equipment, it becomes increasingly 
important to be able to ensure that all facilities will operate simultaneously in the context of 
electromagnetic compatibility (EMC) without interfering with each others’ respective functions. The 
EMC legislation which came into force at the beginning of 1996 applies to all electrical and 
electronic products marketed in the EU, both new and existing ones. So the latter may have to be 
modified so that they are neither susceptible to electromagnetic interference, nor emit spurious 
radiation. Ferrite cores are ideally suited for this purpose since they are able to suppress 
interference over a wide frequency range.

At frequencies above 1 MHz, ferrite rings slipped over a conductor lead to an increase in the imped-
ance of this conductor. The real component of this impedance absorbs the interference energy.

A ferrite material’s suitability for suppressing interference within a specific frequency spectrum 
depends on its magnetic properties, which vary with frequency. Before the right material can be 
selected, the impedance lZ l must be known as a function of frequency.

The curve of impedance as a function of frequency is characterized by the sharp increase in loss at 
resonance frequency.

Measurement results:

The measurements shown here were made at room temperature (25 

r

3) °C using an HP 4191A RF 

impedance analyzer with a flux density of ˆB

d

1 mT.

The maximum of the impedance curve shifts to lower frequencies as the number of turns increases; 
this is due to the capacitive effect of the turns (figure 15, using R 25/15 as an example).

Figure 15

Impedance characteristic curve

The impedance curves of different materials are summarized on page 51 for direct comparison. The 
normalized impedance lZ l

n

 = lZ l / N

2

 x 

6

(l

e

/A

e

) were used to display material properties only. The 

geometry factor was calculated on the basis of the core dimensions.

These normalized impedance curves are guide values, mostly measured using toroidal core R 10 
with a number of turns N = 1 (wire diameter 0.7 mm); they may vary slightly, depending on the 
geometry.

EMI applications

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4.2

Common-mode chokes

Compact electrical and electronic equipment primarily generates common-mode interference. In 
order to be able to meet the safety requirements (keeping within the leakage current limits), chokes 
with a high asymmetrically effective inductance must be used. Current-compensated chokes with 
a closed core topology are especially suitable for this purpose. The problem of core material 
saturation due to the useful current is solved in these designs by winding two coils with equal 
number of turns on the core. These coils are connected in such a way that the magnetic flux induced 
by the upper coil is compensated by the lower coil.

The new Magnetic Design Tool of EPCOS contains the normalized impedance versus frequency 
curves of all ferrite materials, which are suitable for EMI applications.

Figure 16

Current-compensated toroid choke; double choke shown as an example

4.3

NiZn ferrites

Toroidal cores of NiZn ferrites are especially suitable for the suppression of high frequency interfer-
ence, because of the high ohmic resistance of these materials (ca. 10

5

:

m). Therefore the negative 

effect of eddy current is negligible and the usage of these materials allow relatively high impedance 
values even at frequency well above 100 MHz. There is limiting factor to create NiZn ferrites with 
higher initial permeability, because with increasing permeability the Curie temperature decreases. 
For example the Curie temperature for a NiZn ferrite of 

P

i

= 2300 (M13) is specified >105 °C, which 

is at the limit for many applications.

Operating current

Line

Ferrite core

operating current

Magnetic flux induced
in core by

windings

current flow
throught

source

Disturbing
interference

disturbing interference current

Magnetic flux induced
in core by

interference

Common-mode interference
current disturbing asymmetrical

II8&++*#7

EMI applications

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An applicacion example in the automotive sector is the CAN bus choke, where core sizes from outer 
diameter 2.5 mm to 6.3 mm (0.1 to 0.29 inch) in material K8 and K10 are used. As the transmission 
frequencies in the telecom industry are rising, it is also expected, that the demand for NiZn ferrites 
will grow.

Another application example for NiZn ferrite toroids is the usage of cores alone on component leads 
or in board level circuitry either

– to prevent any parasitic oscillations or

– to attenuate unwanted signal pickup or transmissions which might travel along component leads 

or interconnecting wires, traces, or cables.

4.4

MnZn ferrites

For the application as current-compensated chokes MnZn ferrites are widely used in the whole 
range of sizes. The advantage of the MnZn materials is the much higher permeability, which can be 
realised together with a sufficiently high Curie temperature. Using very high permeability ferrites re-
duces the number of turns, which are necessary to reach a certain inductance. This avoids the neg-
ative impact of a high number of turns like DC resistance or parasitic capacitance and not at least 
costs.

Small cores R 2.5 up to R 12.5 in the materials N30, T38, T46 can be used for example in Telecom 
networks like ISDN.

Cores of mid range sizes from R 13.3 to R 26 are used as choke in power lines usually in electronic 
ballasts in lamps, switch-mode power supplies in TV sets, washing machines and chargers. Ferrite 
materials: N30, T65, T35, T37, T38 and T46.

The usage for core sizes R 34 and bigger are in industrial applications, in filters for frequency 
converters (lifts, pumps, traction systems, conveyer systems, air conditioning systems), general-
purpose application in power electronics, UPS and wind-driven power plants. Especially for high 
temperarure or/and high current application in these fields our material T65 is the most suitable 
because of its high saturation flux density of 460 mT and high Curie temperature of >160 °C. The 
initial permeability on big cores is about 4500 to 5000.

If there is not especially high current or high temperature applied, we recommend to use our 
materials N30 (

P

i

= 4300) and T37 (

P

i

 approx. 5500 to 6000 on big cores). The choice of material 

depends on the frequency range, which has to be covered by the attenuation. This is determined 
by the characteristic of permeability.

EMI applications

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5

Cores for inductive sensors

The proximity switch, widely used in automation engineering, is based on the damping of a high-
frequency LC oscillator by the approach of a metal. The oscillator inductor consists of a cylindrical 
coil and a ferrite core half whose open side forms what is known as the active area. The function of 
the ferrite core consists in spatially aligning the magnetic field so as to restrict the interaction area.

The oscillator design must take into account that the inductor forms a magnetically open circuit. The 
inductance and quality are decisively dependent on the coil design, unlike in the case of closed 
circuits. The initial permeability plays a subordinate role here, as is shown by the following example:

Core:

P 9

u

5 (B65517D*)

Coil:

100 turns, 0.08 CuL

Current:

1 mA

Frequency:

100 kHz

Decisive for this application is the attainment of as high a Q as possible, with the lowest possible 
dependence on temperature at the oscillator frequency. When the distance between the damping 
lug and the active area changes, the oscillator Q should however change as strongly as possible.

If the relative change in Q 

'

Q/Q exceeds a predefined threshold, e.g. 10%, a switching operation 

is initiated at the so-called operating distance. Attainment of the target values depends on appro-
priate coil dimensioning and can generally only be performed empirically.

Figure 17

Inductance and quality versus initial permeability

P 9.3 

u

2.7, N = 100, f = 100 kHz, I = 1 mA

Inductive sensors

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6

Cores for power applications

6.1

Core shapes and materials

The enormously increased diversity of application in power electronics has led to a considerable 
expansion not only in the spectrum of core shapes but also in the range of materials.

To satisfy the demands of higher-frequency applications, the EFD cores have been developed 
in sizes EFD 10, 15, 20, 25 and EFD 30. These are characterized by an extremely flat design, 
optimized cross-sectional distribution and optimized winding shielding.

For many standard applications up to 100 kHz, materials N27, N41 and N72 can be used. For the 
range up to 500 kHz, materials N92, N87 and N97 are suitable. N49 covers the range from 300 kHz 
to 1 MHz e.g. for DC/DC (resonance) converters.

For detailed information on core shapes see the individual data sheets, for general information on 
materials see the chapter on SIFERRIT materials.

6.2

Low-profile cores for planar magnetics

The design of planar devices has attracted the attention of magnetic design engineers, since this 
type of devices has interesting advantages over conventional wound components (cf. figure 18):

Low total height

Outstanding reproducibility of electrical parameters

Excellent thermal performance

High degree of integration

a) Conventional magnetics

b) Planar magnetics

Figure 18

Principle of conventional and planar magnetics

In order to fulfill the requirements of this technology, suitable cores are needed. The most common 
designs of low-profile cores have been adopted in the IEC standards IEC 62317-4 for RM LP cores 
and IEC 62317-9 for ELP, EQ and ER planar cores to offer geometrically compatible cores for this 
application.  A common denominator of these cores is that the length of the core is larger than both 
its total height and its width.

Secondary

Primary

Power applications

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Cautions and warnings 

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The advantages of this core design are:

High A

L

 values

High core surface to volume ratio

Large core surface to contact heat sink

The preferred materials used in combination with low-profile cores are N87, N97, N92 and N49 
for power applications as well as T38 and T46 for applications requiring high inductance values.

6.3

Correlation: Applications – core shape/material

6.3.1

Step-down converters

Figure 19

Typical circuit diagram

Advantages

Only one choke required

High efficiency

Low radio interference

Disadvantages

Only one output voltage

Restricted short-circuit withstand capability (no line isolation)

Application areas

Providing a constant output voltage, isolated from input voltage

Regulation in a forward converter

Regulated voltage inversion

Sinusoidal line current draw

Core/material requirements

Standard requirements regarding losses and saturation

EPCOS recommendations for core shape/material

E/ETD/U/RM cores made of

N27 (standard)

N87, N97 (low losses, high saturation)

N92 (very high saturation)

Power applications

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on page 609.

6.3.2

Single-ended flyback converter

Figure 20

Typical circuit diagram

Advantages

Simple circuit variant (low cost)

Low component requirement

Only one inductive component

Low leakage losses

Several easily regulatable output voltages 

Disadvantages

Close coupling of primary and secondary sides

High eddy current losses in the air gap area

Large transformer core with air gap restricts possible applications

Average radio interference

Exacting requirements on the components

Application areas

Low and medium powers up to max. 200 W with wide output voltage range

Maximum operating frequency approx. 100 kHz

Core/material requirements

Low power losses at high temperature

Very high saturation with low dependence on temperature

Gapped cores (recently also with A

L

 value guarantee)

EPCOS recommendations for core shape/material

E/U cores in

N27 (standard)

N87, N92 (low losses, high saturation)

Power applications

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Cautions and warnings 

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6.3.3

Single-ended forward converter

Figure 21

Typical circuit diagram

Advantages

Higher power range than flyback converter

Lower demands on circuit components

High efficiency

Disadvantages

2 inductive components

Large choke

Demagnetization winding 

High radio interference suppression complexity

Increased component requirement, particularly with several regulated output voltages

Application areas

Medium and high powers (up to 500 W) especially in the area of low output voltages 

PWM (pulse width) modulation up to approx. 500 kHz

Core/material requirements

Low losses at high temperatures and at high frequencies (low eddy-current losses)

Generally, ungapped cores

EPCOS recommendations for core shape/material

E/ETD, small EFD cores, RM/PM cores made of

N27, N41 (up to 100 kHz)

N87, N97 (up to 500 kHz)

N49 (up to 1 MHz)

Power applications

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6.3.4

Push-pull converter

Figure 22

Typical circuit diagram

Advantages

Powers up to the kW range

Small choke

High efficiency

Low radio interference suppression complexity

Disadvantages

2 inductive components

Complex winding

High component requirement, particularly with several regulated output voltages

Application areas

High powers (»100 W), also at high output voltages

PWM (pulse width) modulation up to 500 kHz

Core/material requirements

Low losses at high temperatures 

Low eddy-current losses since application areas is up to 500 kHz and above

Generally, ungapped cores

EPCOS recommendations for core shape/material

Large E/ETD, RM/PM cores made of

N27, N97, N87 (with large core cross sections (A

e

t

250 mm

2

), on account of eddy-current losses 

N87 must be used even where f <100 kHz)

Power applications

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6.3.5

Electronic lamp ballast device

Figure 23

Typical circuit diagram

Advantages

Considerably reduced size compared to 50 Hz line solution

Significantly higher efficiency than line voltage regulator

Disadvantages

High component requirement

Application areas

Control unit for fluorescent lamps

Core/material requirements

Low losses in the range 50 to 80 °C

Pulse power requirements

Gapped and ungapped E cores

Ring cores with defined pulse characteristic

EPCOS recommendations for core shape/material

E/ETD/EFD cores made of N72 for L

1

Fluorescent lamp

Power applications

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Cautions and warnings 

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6.4

Selection of switch-mode power supply transformer cores

The previous section (Correlation: Applications – core shape/material) provides a guide for the 
rough selection of core shape and material.

The following procedure should be followed when selecting the actual core size and material:

1) Definition of requirements

– Range of power capacities P

trans

– Specification of the SMPS type
– Specification of pulse frequency and maximum temperature rise
– Specification of the maximum volume

2) Selection of “possible” core shapes/materials on the basis of the “Power capacity” tables starting 

on page 163.

These tables associate core shape/material combinations (and the volume V) with the power 
capacity of the different converter types at a “typical” frequency f

typ

 and a “cut-off frequency” f

cutoff

.

The typical frequency specified here is a frequency for which specific applications are known, or 
which serves as the base frequency for the specified core loss values.

The cut-off frequency is selected such that the advantages of other materials predominate above 
this frequency and that it is therefore advisable to switch to a different material which is better 
optimized for this range.

3) Final selection of core shape/material

The core shapes/materials selected as possibilities under 2) must now be compared with the 
relevant data sheets for the specific core types and the material data (typical curves), taking the 
following points into consideration:

– Volume
– Accessories (power coil former)
– A

L

 values of ungapped core

– A

L

 values/air gap specifications

– Temperature minimum for losses, Curie temperature T

C

, saturation magnetization B

S

, magnetic 

bias characteristic, amplitude permeability characteristic

Core shape/material combinations which are not contained in the individual data sheets can be 
requested from EPCOS.

6.5

Selection tables: Power capacities

In order to calculate the transmissible power, the following relationship is used (transformer with two 
equal windings):

where C is a coefficient characterizing the converter topolgy

1)

, i.e.

C = 1:

push-pull converter

C = 0.71: single-ended converter

C = 0.62: flyback converter

P

tr ans

C

'

B fA

e

A

N

j

˜

˜

=

1) G. Roespel, “Effect of the magnetic material on the shape and dimensions of transformers and chokes in switched-

mode power supplies”, J. of Magn. and Magn. Materials 9 (1978) 145-49

Power applications

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Application notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Both the core losses associated with the flux swing 

'

B and the copper losses due to the current 

density j result in a temperature increase 

'

T. Assuming that both loss contributions are equal and 

that P

v

~B

2

 , the power capacity can be approximated by

The equation shows how the different aspects in the design contribute to the power capacity:

– The material term is the performance factor PF divided by the square root of the specific core 

loss level for which it was derived (cf. page 49 and page 132). For a given core shape deviations 
from this value are possible as given by its data sheet.

– The values for 

'

T are associated with the material according to the following table.

– The thermal resistance is defined as

– These values should be regarded as typical for a given core shape. They were determined by 

measurement under the condition of free convection in air and are given in the table on 
page 168 ff.

For actual designs the actual values for R

th

 should be determined and the tabulated P

trans

 values 

(cf. page 167 ff) adjusted accordingly.

– The winding design was taken into account in the calcualtions by f

Cu

 = 0.4 and 

U

Cu

 for DC. In 

actual design large deviations of the DC resistance due to high frequency effects (skin effect, 
proximity effect) occur, unless special wire types such as litz wires are used. If the R

AC

/R

DC

ratio for a given winding is known, this can be used to correct the tabulated power capacities 
accordingly.

'

T

K

N27

N41

N49

N51

N72

N87

N88

N92

N95

N96

N97

PC47

30

30

20

10

40

50

90

50

50

30

50

60

P

tr ans

C

PF

P

V

-----------

'

T

R

th

--------

f

Cu

U

Cu

---------

A

N

A

e

˜

l

N

l

e

˜

------------------

˜

˜

˜

˜

|

­ ® ¯

­ ® ¯

­ ® ¯

­ ° ® ° ¯

Material Thermal

design

Winding

Geometry

R

th

'

T

P

Vc ore

P

Vc opper

+

----------------------------------------------

=

Power applications

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Application notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

– The geometry term is related to the core shape and size. However, note that the thermal 

resistance is also size-dependent via the empirical relation (cf. figure 24):

The tabulated power capacities provide a means for making a selection among cores, although 
the absolute values will not be met in practice for the reasons explained before.

In the calculation of power capacities the following conditions were also applied:

– The application area for flyback converters was restricted to f <150 kHz.

– The power specifications for N49 should be read as applicable to DC/DC (quasi) resonance 

converters (single-ended forward operation).

– The maximum flux densities were defined as follows:

For flyback converters: 

'

B

d

200 mT  (

'

B

d

50 mT for material N49)

For push-pull converters: 

'

B

d

400 mT.

Figure 24

Thermal resistance versus core effective volume

R

th

1

V

e

----------

a

Power applications

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04/13

Application notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

P

trans

 of cores for wound transformers (f

Cu

 = 0.4)

N27

N41

N49

N72

N87

N92

N95

N97

f

typ

 [kHz]

25

25

500

25

100

100

100

100

RM 4 LP

19

20

18

RM 4

22

24

31

RM 5 LP

29

35

32

RM 5

9

38

48

61

RM 6 LP

45

56

51

RM 6

17

64

79

101

RM 7 LP

67

82

75

RM 7

23

86

107

137

RM 8 LP

97

121

111

RM 8

35

131

162

207

RM 10 LP

173

214

196

RM 10

63

234

289

370

RM 12 LP

366

453

416

RM 12

136

503

622

796

RM 14 LP

611

756

694

RM 14

229

846

1046

1339

PQ 16.11

47

42

39

45

48

PQ 20/16

105

95

88

102

107

PQ 20/20

127

115

107

123

130

PQ 26/20

207

187

174

201

211

PQ 26/25

256

231

215

248

260

PQ 32/20

290

262

244

281

296

PQ 32/30

437

395

367

424

445

PQ 35/35

594

537

500

576

606

PQ 40/30

613

554

515

595

625

PQ 40/40

804

726

676

780

819

PQ 50/40

1244

1124

1046

1207

1267

PQ 50/50

1468

1326

1234

1424

1496

PM 50/39

391

1742

PM 62/49

673

2999

PM 74/59

1131

5036

PM 87/70

1567

6982

PM 114/93

2963

13196

Power applications

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164

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Application notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

EP 5

2.6

EP 6

2.7

EP 7

13

EP 10

25

EP 13

55

EP 17

114

EP 20

329

P 9 

u

5

14

P 11 

u

7

25

P 14 

u

8

12

62

P 18 

u

11

133

P 22 

u

13

232

P 26 

u

16

394

P 30 

u

19

613

E 5

1.7

E 6.3

2.4

E 8.8

5.0

E 10/5.5/5

14

30

E 13/7/4

5

28

E 14/8/4

7

13

E 16/6/5

9

45

E 16/8/5

13

13.2

67

E 19/8/5

16

82

E 20/10/6

26

118

E 21/9/5

15

E 25/13/7

49

218

E 25.4/10/7

42

189

E 30/15/7

94

418

E 32/16/9

118

525

E 32/16/11

566

E 34/14/9

118

530

E 36/18/11

146

652

E 40/16/12

172

574

768

P

trans

 of cores for wound transformers (f

Cu

 = 0.4)

N27

N41

N49

N72

N87

N92

N95

N97

f

typ

 [kHz]

25

25

500

25

100

100

100

100

Power applications

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165

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Application notes

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

E 42/21/15

214

952

993

E 42/21/20

289

1290

1332

E 47/20/16

304

1350

E 55/28/21

538

2396

E 55/28/25

763

3400

E 56/24/19

532

1167

E 65/32/27

1091

4860

E 70/33/32

1453

6500

E 80/38/20

1503

6700

EEQ 13/2.85

49

43

42

48

EIQ 13/3.85

28

25

24

28

EEQ 20/6.3

212

202

196

220

EIQ 20/8.6

145

137

132

145

EEQ 25/8

294

286

278

310

EIQ 25/7.9

182

175

169

190

EEQ 30/8

503

501

486

540

EIQ 30/10.7

360

351

340

380

ER 9,5

9

ER 11/5

15

14

ER 14,5/6

15

12

11

12.5

ER 18/3/10

75

69

66

76

EER 23/5/13

177

167

162

171

183

EIR 23/7/13

111

105

101

114

ER 25/6/15

247

238

230

258

ER 25/9/15

155

147

143

161

ER 28/17/11

290

ER 32/5/21

387

381

370

412

ER 35/20/11

309

1388

ER 42/22/15

384

1725

ER 46/17/18

376

ER 49/27/17

636

ER 54/18/18

482

2168

P

trans

 of cores for wound transformers (f

Cu

 = 0.4)

N27

N41

N49

N72

N87

N92

N95

N97

f

typ

 [kHz]

25

25

500

25

100

100

100

100

Power applications

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background image

166

04/13

Application notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

ETD 29/16/10

96

428

548

ETD 34/17/11

151

674

863

ETD 39/20/13

230

1023

1309

ETD 44/22/15

383

1708

2186

ETD 49/25/16

594

2645

3385

ETD 54/28/19

897

3998

5116

ETD 59/31/22

1502

6692

8564

EFD 10/5/3

13

12

12.5

EFD 15/8/5

38

42

44

EFD 20/10/7

93

115

119

EFD 25/13/9

245

266

EFD 30/15/9

258

319

345

EV 15/9/7

175

231

252

EV 25/13/13

316

685

750

EV 30/16/13

482

1050

1140

UI 93/104/16

1028

4600

UU 93/152/16

1413

6350

UI 93/104/20

1283

5750

UU 93/152/20

1780

8000

UI 93/104/30

1784

7950

UU 93/152/30

2874

12800

U 101/76/30

4400

19750

UU 126/182/20

16150

UI 126/119/20

10850

U 141/78/30

4300

19300

P

trans

 of cores for wound transformers (f

Cu

 = 0.4)

N27

N41

N49

N72

N87

N92

N95

N97

f

typ

 [kHz]

25

25

500

25

100

100

100

100

Power applications

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background image

167

04/13

Application notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

P

trans

 of low-profile cores for planar transformers (f

Cu

 = 0.1)

N 49

N 87

N 92

N 95

N 97

f

typ

 [kHz]

500

100

100

100

100

RM 4 LP

9.5

10

RM 5 LP

14

17.5

RM 6 LP

22

28

RM 7 LP

33

41

RM 8 LP

48

60

RM 10 LP

86

107

RM 12 LP

183

226

RM 14 LP

305

378

ER 9.5

4.5

ER 11/5

7.5

7

ER 14.5/6

13

12

11

12

EILP 14

12

11

10

10

EELP 14

16

17

16

18.5

16

EILP 18

30

37

34

36

EELP 18

44

55

50

59

EILP 22

78

96

88

105

EELP 22

109

134

123

146

EILP 32

143

177

171

186

192

EELP 32

203

252

244

261

274

EILP 38

262

323

313

352

EELP 38

380

470

454

510

EILP 43

360

445

430

482

EELP 43

500

619

599

666

672

EILP 58

731

EELP 58

1046

EILP 64

800

991

EELP 64

1130

1397

Power applications

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04/13

Application notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

6.6

Thermal resistance for the main power transformer core shapes

Core shapes

R

th

 (K/W)

Core shapes

R

th

 (K/W)

Core shapes

R

th

 (K/W)

RM 4

120

P 11 

u

 7

106

EI LP 64

9,5

RM 4 LP

135

P 14 

u

 8

73

EE LP 64

9

RM 5

100

P 18 

u

 11

51

EE LP 32

24

RM 5 LP

111

P 22 

u

 13

37

EI LP 38

20

RM 6

80

P 26 

u

 16

27

EE LP 38

18

RM 6 LP

90

P 30 

u

 19

22

EI LP 43

16

RM 7

68

P 36 

u

 22

17

EE LP 43

15

RM 7 LP

78

E 5

308

EI LP 58

12

RM 8

57

E 6,3

283

EE LP 58

11

RM 8 LP

65

E 8.8

204

ER 9.5

164

RM 10

40

E 13/7/4

94

ER 11/5

134

RM 10 LP

45

E 14/8/4

79

ER 14.5/6

99

RM 12

25

E 16/6/5

76

ER 28/17/11

22

RM 12 LP

29

E 16/8/5

65

ER 35/20/11

18

RM 14

18

E 19/8/5

60

ER 42/22/15

14

RM 14 LP

21

E 20/10/6

46

ER 46/17/18

13

PQ 16/11.6

77

E 21/9/5

59

ER 49/27/17

9

PQ 20/16

51

E 25/13/7

40

ER 54/18/18

11

PQ 20/20

46

E 25.4/10/7

41

ETD 29/16/10

28

PQ 26/20

32

E 30/15/7

23

ETD 34/17/11

20

PQ 26/25

29

E 32/16/9

22

ETD 39/20/13

16

PQ 32/20

27

E 32/16/11

21

ETD 44/22/15

11

PQ 32/30

22

E 34/14/9

23

ETD 49/25/16

8

PQ 35/35

19

E 36/18/11

18

ETD 54/28/19

6

PQ 40/30

19

E 40/16/12

20

ETD 59/31/22

4

PQ 40/40

16

E 42/21/15

19

EFD 10/5/3

120

PQ 50/40

12

E 42/21/20

15

EFD 15/8/5

75

PQ 50/50

11

E 47/20/16

13

EFD 20/10/7

45

PM 50/39

15

E 55/28/21

11

EFD 25/13/9

30

PM 62/49

12

E 55/28/25

8

EFD 30/15/9

25

PM 74/59

9,5

E 56/24/19

9.5

EV 15/9/7

55

PM 87/70

8

E 65/32/27

6.5

EV 25/13/13

27

PM 114/93

6

E 70/33/32

5.5

EV 30/16/13

21

EP 5

329

E 80/38/20

7

UU 93/152/16

4.5

EP 6

318

EI LP 14

116

UI 93/104/16

5

EP 7

141

EE LP 14

105

UU 93/152/20

4

EP 10

122

EI LP 18

61

UI 93/104/20

4.5

EP 13

82

EE LP 18

56

UU 93/152/30

3

EP 17

58

EI LP 22

38

UI 93/104/30

4

EP 20

32

EE LP 22

35

U 101/76/30

3.3

P 9 

u

 5

142

EI LP 32

26

U 141/78/30

2.5

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Processing notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1

Gapped and ungapped ferrite cores

Even with the best grinding methods known today, a certain degree of roughness on ground 
surfaces cannot be avoided, so that the usual term “without air gap”  or “ungapped” does not imply 
no air gap at all. The A

L

 values quoted allow for a certain amount of roughness of the ground faces. 

The tolerance of the A

L

 value for ungapped cores is –20 to +30% or –30 to +40%. Closer tolerances 

are not available for several reasons. The spread in the A

L

 values of ungapped cores practically 

equal the spread in ring core permeability (

r

20% …

r

30%), and the A

L

 value largely depends on 

the grinding quality of the matching surfaces.

The following are normally defined:

precision-ground/lapped cores

s

resid

|

1

P

m

normally ground cores

s

resid

|

 10 

P

m

gapped cores

s

t

 10 

P

m

The residual air gap s

resid

 here is the total of the residual air gaps at the leg or centerpost contact 

surfaces.

With increasing material permeability the influence of the inevitable residual air gap grows larger. 
The spreads in the A

L

 value may also be increased by the mode of core assembly. Effects of 

mounting and gluing can result in a reduction of the A

L

 value. An appropriate wringing of cores with 

polished surface is used to improve reproducibility of the measurement (it is recommended to rub 
the mating surfaces themselves six times in a circular or elliptic arc that matches the core profile 
before measuring A

L

).

Figure 25

Relationship between permeability 

P

e

 and air gap s for an RM 4/T38 ferrite core

Air gap s

Processing notes

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Processing notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

2

Processing notes for the manufacture of wound products for small-signal and 
power applications

2.1

Winding design

For the most common core types the maximum number of turns for the individual coil formers can 
be seen from the following nomograms. The curves have been derived from the equation

where

N

=

Max. number of turns

A

N

=

Winding cross section in mm

2

A

wire

=

Wire cross section in mm

2

f

Cu

=

Copper space factor versus wire diameter

(f

Cu

 approx. 0.55 for wire diameter 0.05)

Common wires and litz wires are specified in the pertinent standards (IEC 60317).

As can be seen from Figure 26, as high a winding level as possible should be employed because 
at low

P

e

 values in particular a low winding level (h/H ratio) can cause an A

L

 drop of up to 10% 

compared to the maximum value with full winding. (By our standards, the A

L

 values are always 

related to fully wound 100-turn coils.)

N

A

N

A

wi re

------------- f

Cu

˜

=

Figure 26

Percentage change in A

L

 value versus relative winding height h/H

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Processing notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

RM cores

Maximum number of turns N for coil formers

1) American Wire Gauge (AWG)

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Processing notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

PQ cores

Maximum number of turns N for coil formers

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Processing notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

PM cores

Maximum number of turns N for coil formers

1)

Outer diameter of insulated wire

AWG

1)

 size (approx.)

1) American Wire Gauge (AWG)

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Processing notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

EP cores

Maximum number of turns N for coil formers

1) American Wire Gauge (AWG)

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Processing notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

P cores

Maximum number of turns N for coil formers

1) American Wire Gauge (AWG)

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Processing notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

EFD cores

Maximum number of turns N for coil formers

Outer diameter of insulated wire

AWG

1)

 size (approx.)

<7B&*(-#'

1) American Wire Gauge (AWG)

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Processing notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

ETD and ER cores

Maximum number of turns N for coil formers     

1) American Wire Gauge (AWG)

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Processing notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

E cores

Maximum number of turns N for coil formers

1) American Wire Gauge (AWG)

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Processing notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

SMD types

Maximum number of turns N for coil formers

1) American Wire Gauge (AWG)

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Important notes 

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and

Cautions and warnings 

on page 609.

2.2

Soldering/Inductor assembly

The winding wires are preferably connected to the pins by dip soldering. Note the following when 
soldering:

– Prior to every dip soldering process the oxide film must be removed from the surface of the solder bath.
– 2 to 3 turns of the wire are dipped into the solder bath; the coil former must not be allowed to 

come too close to the solder or remain there for too long (see diagram).

– Typical values are: Bath temperature: 400 °C, soldering time: 1 s.

For inductor assembly, it is advisable to clamp the cores with the associated relevant mounting 
assemblies for the coil formers and cores. In this way it is possible to avoid the effects of external 
mechanical stress.

2.3

Design and processing information for SMD components

2.3.1

Automatic placement

EPCOS ferrite accessories are suitable for automatic placement. Many automatic placement 
machines pick up the components with suction probes and pliers, so the inductive components 
should have simple and clear contours as well as a sufficiently large and flat surface. Ferrite cores 
with a perpendicular magnetic axis, e.g. RM and ER cores, have a smooth surface and the flange 
for the coil former is styled right for the purpose. For cores with a horizontal magnetic axis, e.g. E 
cores and toroids, we provide cover caps to meet these requirements.

2.3.2

Coplanarity

Coplanarity means the maximum spacing between a terminal and a plane surface. If inductive com-
ponents are fabricated with coplanarity of <0.2 mm for example, then one or more terminals may 
be spaced maximally 0.2 mm from a plane surface.

Inductive components are fabricated to standard with coplanarity of <0.2 mm. Coplanarity is influ-
enced by a number of factors:

a) Coil former specification

The coplanarity of the coil former is <0.1 mm for manufacturing reasons.

b) Winding wire

Use of thick winding wire (e.g. 0.25 mm diameter in model ER 11) leads to considerable mechan-
ical strain on the terminal during winding, and this can degrade coplanarity.

c) Soldering temperature and duration

When winding wire is soldered to a terminal, the coil former is subjected to high thermal stress. 
If thick wires have to be soldered, the soldering temperature and/or duration increase and thus 
the thermal stress on the coil former too. This also degrades coplanarity.

Soldering of PTH (pin through hole)

Soldering of J-leg

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Processing notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Consequently the use of thick wires degrades coplanarity in two ways: greater mechanical strain 
when winding, and greater thermal stress during soldering.

If electrical requirements  call for the use of  thick wires, either  the manufacturing effort is greater 
(it takes longer and the costs are higher), or a terminal geometry has to be chosen that is suitable for 

the use of thick  wires. EPCOS offers two different  SMD lead geometries:  gullwings and J terminals.

Gullwing terminals

Molded-in J terminals

With gullwings the wire is wound direct on the terminal, which is then soldered on the circuit board. 
With J terminals the wire is wound on a separate pin, and the J terminal is soldered to the circuit board.

So gullwings are suitable for applications with thin wire (up to approx. 0.18 mm in diameter), and 
J terminals for use with thick wire (upwards from 0.18 mm in diameter). These figures for wire 
diameter are only intended as guidelines. Depending on wire diameter, the winding arrangement, 
the pinning and electrical requirements, one has to decide from case to case which solution is best 
for the particular application.

2.3.3

Solder paste application

Coplanarity has to be considered when determining the thickness of the solder paste. If coplanarity 
is <0.2 mm for example, the solder paste has to be applied at least 0.2 mm thick to ensure proper 
soldering.

2.4

Adhesive application and core mating

A quantity of adhesive appropriate to the area in question is applied to the cleaned surface of the 
core’s side walls. The centerpost must remain free of adhesive. The two core halves without coil 
former are then placed on a mandrel and rotated against each other two or three times to spread 
the adhesive. A slight ring of adhesive exuding around the edges indicates that sufficient adhesive 
has been applied.

On porous, low-permeability SIFERRIT materials (K) the adhesive should be applied and spread twice.

The next step should follow immediately since the adhesive film easily attracts dust and absorbs 
moisture. Therefore, the core pair with adhesive already applied is opened for a short time and the 
wound coil is inserted without touching the mating surfaces.

The wound coil is then fixed into position. This can be done by using resilient spacers which must 
be inserted before applying the adhesive. Appropriate spacers are available on request.

The coil former can also be fixed by gluing, e.g. using adhesive d), but only at one spot on the core 
bottom to avoid any mechanical stress caused by the difference in thermal expansion of core and 
coil former.

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Processing notes

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Adhesive e) is suitable for external gluing, which implies only four dots of adhesive at the joints on 
both sides of the openings. Because of the somewhat lower torsional strength, it should be noted 
that this kind of gluing should only be used with mounted cores.

2.5

Holding jigs

The core assembly is cured under pressure in a centering jig. The core center hole – where present 
– is used for centering, and two to eight coils can be held in one jig with a pressure spring. Spacers 
will ensure that the pressure is only exerted on the side walls of the core.

Single jigs facilitate the coil inductance measurement, which has proved useful for checking cores 
with small air gaps before the adhesive has hardened. Small inductance corrections can be made 
by slightly turning the core halves relative to each other.

2.6

Final adjustment

(possible only with adjustable cores)

With all assembled ferrite cores, a magnetic activation takes place as a result of mounting influenc-
es such as clamping, gluing and soldering, i.e. a disaccommodation process commences. There-
fore the final adjustment for high-precision inductors should take place no earlier than one day after 
assembly; preferably, one week should first elapse.

2.7

Hole arrangement

For drilling the through-holes into the PC board we recommend the dimensions given in the hole 
arrangement for each coil former, which depend on the distance of the pins on the pin outlet level.

2.8

Creepage and clearance

For telecom transformers the clearance and creepage distances and the thickness of insulation 
must be considered acc. EN 60950 subclause 2.9.

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Packing

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Survey of packing modes

Ferrite cores

Accessories

Type

Packing

Para.

Page

RM cores

RM 4 … RM 10

RM 12, RM 14

Blister tape

Standard tray

3.2

2.2.1

187

185

PQ cores

PQ 16 … PQ 50

PQ 26 … PQ 32

Standard tray

Cardbord tray on request

2.2.1

3.6

185

186

PM cores

PM 50/39 … PM 114/93

Standard tray

2.2.1

185

P cores

All P cores

P 9

u

 5 … P 22 

u

 13

Standard tray

Blister tape on request

2.2.1

3.2

185

187

P core halves

7.35 

u

 3.6 … 150 

u

 30

Standard tray

2.2.1

185

EP cores

EP 5 … EP 20, EPX 9/9

EPX 7/9, EPX 10, EPO 13

Standard tray

Blister tape on request

2.2.1

3.2

185

187

E cores

E 5 … E 10

E 5 and E 6.3

Core length 12.6 … 36 mm

Core length > 36 mm

E 47

Standard tray

Blister tape on request

Block packing

Standard tray

Skin packing

2.2.1

3.3

2.2.2

2.2.1

3.6

185

189

185

185

191

ELP cores

All ELP cores

ELP 43, I 43

Standard tray

Skin packing

2.2.1

3.6

185

191

ER cores

All ER cores

ER 32

Standard tray

(blister tape on request)

Skin packing

2.2.1

3.2

3.6

185

187

191

EQ cores

ETD cores

EFD cores

EV cores

Standard tray

2.2.1

185

U and I cores

Standard tray

2.2.1

185

Toroids (ring cores)

Packing depends on size

and version

(coated/uncoated)

Standard tray

Box

Bag

2.2.1

2.3.2

2.3.1

185

186

186

Double-aperture cores

Bag

2.3.1

186

Coil formers

Polystyrene boards, carton boxes, bags and

blister trays

2.4

186

Mounting assemblies

Boxes

2.3.2

186

Clamps

Bags (individual clamps)

2.3.1

186

Insulating washers

Bags (individual washers), boxes

2.3.1

186

Insulating washers

Packed on reels

2.3.2

186

Packing

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Packing

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1

General information

Our product packaging modes ensure maximum protection against damage during transportation. 
Moreover, our packing materials are selected with environmental considerations in mind. They are 
marked with the appropriate recycling symbols.

Because of the large variety of types and sizes, we use five basic kinds of packing, which are de-
scribed in points 2 and 3 below:

Blister tape

Tray

Container

Reel

Magazine

The packing units are based on the following system:

1.1

Packing unit (PU)

Usually, a packing unit is a collection of a number of basic packages. The size of the packing unit 
is stated for the particular components in their data sheets. When ordering, please state complete 
packing units if possible. We reserve the right to round the ordered quantity accordingly.

1.2

Dispatch unit

A number of packing units are combined to form a dispatch unit. Standard dispatch units for large 
quantities are a Europallet or pallet carton. For small quantities, folding corrugated cardboard boxes 
are used in standard sizes. In the case of small quantities a dispatch unit may also include packages 
with other components.

1.3

Barcode label

On the product packing label (standard label) we include bar-code information in addition to plain 
text. In addition to benefits relating to the internal flow of goods, this provides above all a more rapid 
and error-free means of identification checking for the customer.

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Packing

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

2

Modes of packing

2.1

Blister tape

Blister packing was specially devised for handling by automatic systems but has also proved to be 
very good for conventional handling, especially where small quantities are concerned. See point 3.2 
for a detailed description and a list of the core types that can be supplied in this type of packing.

2.2

Tray (pallet)

2.2.1

Standard tray

The polystyrene tray (basic package) is the standard packing for most types of core. The area of 
200 mm

u

300 mm corresponds to the module dimensions of DIN 55 510 and is based on the area 

of the 800 mm

u

1200 mm Europallet. Depending on the overall height of the trays and the numbers 

contained, several trays will be stacked to form a packing unit and provided with a corrugated card-
board cover. For the protection of the cores the entire stack is also shrink-wrapped in polyethylene 
film.

Each core is enclosed in a separate compartment. When P cores and similar types are packed in 
sets, the halves of the core pairs are packed so that their pole faces are opposite one another. As 
a rule their association is identified by markings in the polystyrene (recessed webs, thinner webs). 
In the case of P 3.3

u

2.6 and P 4.6

u

4.1 cores the halves of a set are not located in a single tray 

but in different trays of a packing unit.

2.2.2

Block packing

For E and U core we prefer block packing in trays with the dimensions 200 mm 

u

 300 mm. The 

symmetry, position, length and spacing of the blocks are always the same. The height of the tray is 
dependent on the size of the core. For the makeup of a packing unit see point 2.2.1.

Block packing can be supplied in boxes of corrugated cardboard (special packing unit!) on request.

Block packing permits highly rationalized handling and is designed for automatic processing.

Packing unit for standard or block packing

Label

Shrink-wrapped plastic film

Corrugated

PU

Tray =
basic passage

cardboard
cover

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Packing

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

2.3

Container

2.3.1

Bag

Small ferrite parts are packed in flat polyethylene bags. The number per bag depends on the volume 
of the parts. Generally four bags in a corrugated cardboard box form a packing unit.

Small accessories (clamps, pinless and SMD coil formers) are also packed in this way. The size of 
the bag depends on the volume of the parts (packing unit).

2.3.2

Boxes

Coated ring cores of medium size are packed in cardboard boxes with cardboard or polyethylene 
foam inlays. The number per box depends on the volume of the cores.

Accessories (large mounting assemblies, clamps, washers packed on reels etc.) are packed in 
boxes of cardboard or corrugated cardboard.

2.4

Packing for coil formers

For coil formers we use different packing types depending on size, pin type and packing equipment. 
So we use polystyrene boards for some PTH coil formers like RM types. For most of the other PTH 
coil formers and some SMD coil formers we use cardboard boxes as bulk packaging. Coil formers 
without pins are mainly packed in plastic bags. For some SMD coil formers we also use blister tray 
packaging.

2.5

Cardboard tray

Cardborad trays are a new ecological packing system, stacked in a cardboard box or in a plastic 
bag.

Advantages:
– Environmentally friendly solution with easy-to-recycle materials.
– Good removing cores from tray.

Packing unit for cardboard trays

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Packing

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

3

Delivery modes for automatic processing

3.1

General information on inductor production

The inductor parts described in the following can be handled by automatic manufacturing systems. 
In addition to automatic winding machines – which can be combined with wrapping, fluxing and 
soldering stations – flexible, high-performance automatic assembly lines are available. Design and 
packing of the individual parts (ferrite cores, coil formers, clamps, insulating washers and adjusting 
screws) have been optimized for automatic processing and permit easy feeding to the various 
stations of production lines.

We supply RM cores up to RM10 (P and EP cores on request) blister-taped in dispenser boxes. By 
inserting a plate-shaped resilient insulating washer between core and coil former, gluing can be 
dispensed with.

We also provide consulting services with examples of implementations to customers planning to 
introduce automatic production lines.

Production sequence

3.2

Cores in blister tape (strips)

The cores are packed in sets ready for assembly, i.e. a stamped core with the base upwards and 
an unstamped core (possibly with a threaded sleeve) with the pole face upwards. The blister tapes 
have a hole at one end for orientation purposes (see also illustration). The tapes are sealed with a 
paper cover. Looking at a tape with the hole on the left and the paper cover on top, then after 

Clamps

Reel

Magazine

Coil former

Insulating film

Ferrite cores

Coil

winding

Coil

Wire

Solder

9ecfed[dj

Blister

dispenser

Assembly of

wound ferrite

component

Reel

Reel

CW]Wp_d[

Insulating washer

Insulating washer

Adjusting screw

Other components

Placement of

components on

circuit board

PC board

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Packing

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

removing the paper cover the stamped cores will be in the upper row and the unstamped cores of 
the sets in the lower row.

Several blister tapes are combined in a box with a perforated tear-off cover (dispenser pack) to form 
a packing unit. The tapes are packed so that the orientation hole appears in the dispenser opening. 
The box is shrink-wrapped in polyethylene film.

The following table lists the core types which are available in blister tape:

For ordering codes refer to the individual data sheets.

Dimensions are nominal; tolerances given in design drawings.

Type

Dimensions of

blister tape

l

u

 b 

u

 d

mm

Spacing

mm

Spacing

upper/

lower

row

mm

Dimensions of

dispenser pack

l

u

 b 

u

 h

mm

Sets/

tape

Tapes/

box

Sets/

box

Approx.

net

weight

g

RM cores

RM 4

RM 4 LP

RM 5

RM 6

R 6 

RM 7

RM 8

RM 10

RM 10 LP

340 

u

 60 

u

6.6

340 

u

 60 

u

5.0

340 

u

 60 

u

8.0

340 

u

 60 

u

8.0

340 

u

 60 

u

8.0

295 

u

 82 

u

9.4

295 

u

 82 

u

 11.8

295

u

 82 

u

 11.8

295

u

 82 

u

9.4

17.0

17.0

17.0

17.0

17.0

29.5

29.5

29.5

29.5

27.5

27.5

27.5

27.5

27.5

38.5

38.5

38.5

38.5

349 

u

 63 

u

 203

349

u

 63

u

 203

349

u

 63

u

 203

349

u

 63

u

 203

349

u

 63

u

 203

301

u

 85

u

 240

301

u

 85

u

 240

301

u

 85

u

 240

301

u

 85

u

 240

20

20

20

20

20

10

10

10

10

30

40

25

25

25

25

20

20

25

600

800

500

500

500

400

200

200

250

1000

1550

2550

2550

1925

2600

4600

EP cores (on request)

EP 7

EP 10

EP 13 

EP 17

EP 20

340 

u

 60 

u

5.0

340 

u

 60 

u

8.0

340 

u

 60 

u

8.0

295 

u

 82 

u

 11.8

295

u

 82 

u

 11.8

17.0

17.0

17.0

29.5

29.5

27.5

27.5

27.5

38.5

38.5

349 

u

 63 

u

 203

349

u

 63

u

 203

349

u

 63

u

 203

301

u

 85

u

 240

301

u

 85

u

 240

20

20

20

10

10

40

25

25

20

20

800

500

500

200

200

1260

1375

2550

2220

5640

P cores (on request)

P 9

u

 5

P 11 

u

 7

P 14 

u

 8

P 18 

u

 11

P 22 

u

 13

340 

u

 60 

u

4.0

340 

u

 60 

u

4.0

295 

u

 82 

u

5.9

295 

u

 82 

u

9.4

295 

u

 82 

u

9.4

17.0

17.0

29.5

29.5

29.5

27.5

27.5

38.5

38.5

38.5

349 

u

 63 

u

 203

349 

u

 63

u

 203

301

u

 85

u

 240

301

u

 85

u

 240

301

u

 85

u

 240

20

20

10

10

10

50

50

40

25

25

1000

1000

400

250

250

800

1700

1280

1500

3250

E cores (tape/reel on request)

Pieces/reel

Pieces/box

E 5

E 6.3

27000 

u

 12 

u

 2.7

27000

u

 12 

u

 2.7

4.0

4.0

4.0

8.0

370 

u

 340 

u

 100

370

u

 340 

u

 100

6500

3400

32500

17000

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Packing

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

3.3

Cores in blister tape (reeled)

E 5 and E 6.3 cores can also be supplied taped and reeled as per IEC 60286-3, optionally in 
conductive or non-conductive tapes. The cores are oriented for automatic feeding. The tapes are 
sealed with a transparent cover tape and wound on 330-mm polystyrol reels. Each reel is identified 
with a barcode label and a release label.

3.4

Blister tapes

The blister compartments always comprise the following function spaces: a free space for the 
gripper claws, the recess in which the core rests and the padding.

The free space enables the cores to be removed by mechanical grippers. On the reverse side of 
the blister, these free spaces lead to a regular grid arrangement with a spacing of 6.2 mm and 
3.1 mm. The blisters should be guided and stopped at these intervals. A hanging arrangement is to 
be preferred, because this avoids problems arising in case the blister height or padding thickness 
varies.

The core recess centers the core in the blister compartment.

The padding serves as protection during transport and as spacing to achieve correct filling of the 
dispenser pack. The shape and position of the padding may vary, depending on the production 
method used. All padding dimensions given must therefore be considered to be subject to change 
at any time.

height

Core

(paper)

Cover tape

areas

Adhesive

Core width

Pad-

C

o

re

 l

engt

h

1/2 spacing

Orientation hole

C

o

re

 spacing

IfWY_d]

 3)

compartments

Upper row of

compartments

Lower row of

1)

 Depends on core height

2)

 Thickness incl. cover tape

3)

 For RM3: 2 sets per spacing

ding

 1)

Padding
Core recess
Free space for gripper claws

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Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

3.5

Dispenser pack

To open a blister tape manually, peel back the paper cover tape smoothly but not too quickly, along 
the axis of the tape as shown in the following illustration.

When opening a blister tape automatically, it is advisable not to completely remove the paper cover. 
Rather, the cover paper should be divided up by means of 4 longitudinal cuts so that the mating 
surfaces remain on the blister (cf. blister tape illustration). The paper strips produced above the two 
rows of compartments can then be easily lifted. This avoids malfunctions resulting from fluctuations 
in the adhesive properties of the paper sealing tape.

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Packing

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

3.6

Skin packing

Skin packing is a new and very compact packing method.

Several cores are placed on a cardboard pallet and sealed in GLTE film by heat shrinking. The var-
ious pallets are then stacked in a cardboard box.

Advantages

Environmentally friendly solution with easy-to-recycle materials

Suitable for all cores larger than E 30

Good protection of mating surface

Film can be peeled back very easily

Code numbers printed on cores can be read through transparent film

Cores for which skin packing is used:

E 47, ELP 43, I 43, ER 32; special types on request.

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Quality and environment

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Corporate goals

Our aim is to play a leading role among the world’s most competitive companies in the sector of 
electronic components. This aim is shared by the EPCOS quality and environment management 
system:

1

EPCOS quality system

1.1

Extract from EPCOS quality policy

The quality of our products and services represents a key constituent of our corporate strategy, 
whose principal aim is customer satisfaction.

Our quality management system is continuously oriented to the international standards that 
stipulate the highest requirements.

1.2

Quality management system

The quality management system to ISO/TS 16949 is applied throughout the company and is used 
to implement the EPCOS quality policy. The implications include:

– As a rule, product and process developments follow the rules of APQP

1)

,

– Quality tools such as FMEA

2)

, DoE

3)

 and SPC

4)

 minimize risks and ensure continuous 

improvements in conjunction with regular internal audits and QM reviews.

1.3

Certification

The EPCOS quality management system forms the basis for the company certification to ISO 9001 
and ISO/TS 16949 that includes all EPCOS plants and sales organizations. The company certi-
ficates are posted on the EPCOS Internet (www.epcos.com/quality).

1.4

Production sequence and quality assurance

The business units implement the corporate specifications for quality management in procedural 
and work instructions referred to products and processes.

The following example shows quality assurance applied to the production sequence of ferrites.

1) APQP = Advanced Product Quality Planning

2) DoE

= Design of Experiments

3) FMEA = Failure Modes and Effects Analysis

4) SPC

= Statistical Process Control

Quality and environment

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Quality and environment

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Production sequence and quality assurance during ferrite manufacture (schematic)

Production steps

Incoming inspection

Analysis of chemical comp.

(X-ray fluorescence analysis)

Granulate production

Weighing, mixing,

presintering, milling.

Homogenization, spraying

incl. process control checks

Batch release

Chemical analysis

Manufacture and testing

of sample cores

Granulate storage

Cores production

Pressing, debindering, sintering

incl. process control checks

Sinter check

Testing of electrical and

mechanical properties

Cores processing

e.g. surface grinding, A

L

 grinding, etc.

incl. process control checks

Final inspection/Monitoring

Testing electr./mech. properties

Packing

in PU (factory packing)

Delivery release, Outgoing inspection,

Checking of reports and finish labeling

Sales warehouse

Quality assurance

X-ray fluorescence

analysis reports

Batch release report

Sinter check test report

Final inspection reports

Date code and batch number

on packing

Raw materials (powder)

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1.5

Delivery quality

“Delivery quality” means compliance with the agreed data at the time of delivery.

1.6

Failure criteria

A component is defective if one of its features does not correspond to the specification of the data 
sheet or an agreed delivery specification. 

1.7

Incoming goods inspection at the customer

For the incoming inspection, we recommend the use of a random sampling plan to DIN ISO 2859 
Part 1 (contents compliant with MIL STD 105 D or IEC 60410).

The test methods used and the AQL must be agreed between the customer and supplier.

1.8

Final inspection/approval for shipment

Final inspection verifies the major properties of the end products batch by batch, usually by means 
of fully automated selection tests.

Approval for shipment helps certify that products shipped comply with specifications. It includes:

testing of principal parameters,

identification check and visual assessment,

examination of papers accompanying the batch.

1.9

Reliability

A variety of endurance tests and environmental tests are conducted to assure the product reliability. 
These tests are derived from the extremes of expected application conditions, with test conditions 
intensified to obtain authoritative results within a reasonable period.

The reliability testing programs of EPCOS are based on the test plans of international standards 
and customer requirements.

EPCOS performs reliability tests to qualify new component families and for periodic requalification.

1.10

Traceability

By recording the lot or batch numbers on the documentation accompanying the process, complete 
traceability is maintained in the production sequence.

After delivery, traceability to the internal release inspections (“quality control gates”) is ensured by 
the batch number which is printed on the label.

1.11

Electrical properties

The measuring conditions can be found in the chapter “General – Definitions”. The product data and 
relevant tolerance limits are defined in the respective data sheets. The material data given in the 
chapter “SIFERRIT materials” are to be understood as typical values.

Measuring conditions deviations from the data book require an agreement between the customer 
and the EPCOS.

1.12

Dimensions

The dimensional drawings in the individual data sheets are definitive for the dimensions.

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1.13

Finish

Assessment of the finish of ferrite cores is performed in accordance with EPCOS finish specifica-
tions. These are based on IEC 60424. Detailed drawings, which are available on request, specify the 
maximum permissible limit values for damage which can never be totally excluded with ceramic com-
ponents. Assessment of the solderability of terminal pins for coil formers and clamps is carried out 
for PTH types to IEC 60068-2-20, test Ta, method 1 (aging 3) and for SMD types to IEC 60068-2-58.

1.14

AQL values

Within the framework of our quality goals, we are gradually tightening the AQL values which are 
intended for use in the customer's incoming goods inspection, currently the value AQL 0.25 is 
applicable, if not otherwise specified.

1.15

Barcode label

The packing of all EPCOS components bears a barcode label stating the type, production ID (1P), 
lot number (1T), date code (10D), production number (30P) and quantity (Q). This enables a 
component to be traced back through the production process, together with its batch and test report.

Example for core label

Example for accessories label

<7B&,.+#+

<7B&-.(#B#;

Coil former  E20  Valox 420SE0
A 1770 B/UL no. E207780
RoHS compatible

MSL: N

B66206B1110T  1

(1P) PROD ID:

(9K) PROD ORDER NO:

000094071260

(D) D/C:

(T) BATCH NO:

FA00000000

[Q] QTY:

735 pieces

Made in China

120221

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1.16

Conditions of use

Please note the “Important notes” on page 2.

Should you have any application-referred questions, please contact our experts, who will be 
pleased to advise you.

1.17

Customer complaints

If a fault occurs in a product despite careful manufacture and testing, please contact your local sales 
organization. They will register your complaint as an RMA

1)

 process and forward it to the relevant 

technical departments for rapid handling.

EPCOS treats technical complaints according to the 8D methodology; i.e. with the use of 
interdisciplinary teams who aim to implement rapid countermeasures and sustained corrections and 
answer all complaints with an 8D report (8D = 8 disciplines).

In order to be able to deal quickly and smoothly with complaints, the following data are helpful:

Number of components subject to complaint or returned

Fault description

How and when was the fault detected?

Logistics data (date code, delivery note no.)

Operating conditions

Operating duration up to occurrence of the fault

Measurement parameters in the case of divergent technical data

In the event of transport damage, we would ask you to describe this in more detail and if required 
to mark it so that it can be distinguished from any further damage sustained during the return 
shipment. The original package should also be checked and any damage to be described. In order 
to avoid further damage, the original packaging should also be used for the return shipment.

1) RMA = Return of Material Authorization

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

2

Environmental management system

2.1

Environmental policy

Our fundamental commitment to environmental protection is laid down in the EPCOS environmental 
policy:

EPCOS defines the following environmental protection principles:

1. We work continuously toward reducing the burden on the environment, toward minimizing 

associated risks and toward lowering the use of energy and resources, above and beyond the 
legal requirements.

2. We take appropriate precautions to avoid environmental hazards and to prevent damage to the 

environment.

3. Potential impact on the environment is assessed and incorporated in process and product 

planning at the earliest possible stage.

4. By applying appropriate management, we ensure that our environmental policy is implemented 

effectively. The technical and organizational procedures required to do this are monitored 
regularly and constantly further developed.

5. Each employee is required to act in an environmentally conscious manner. It is the constant 

duty of management to increase and encourage awareness of responsibility at all levels.

6. We work with our business partners to promote conformity with similar objectives. We supply 

our customers with information on ways to minimize any potentially adverse environmental 
impacts of our products.

7. We work in a spirit of cooperation with the relevant authorities.
8. We inform the public of the impact on the environment caused by the company and our 

activities related to the environment.

9. To regard the rules of labour safety is the task for each employee.

10. We take preventive measures to avoid work-related accidents.

2.2

Environmental management system

The EPCOS ISO 14001 based environmental management system is applied company wide for 
implementing the EPCOS environmental policy. It is posted on the EPCOS Intranet and is thus 
accessible to all employees.

2.3

Certification

The EPCOS Group operates an environmental management system that conforms to the 
requirements of ISO 14001 and is mandatory for all plants. 

The company certificate is posted on the EPCOS internet:

(www.epcos.com/environmental_management).

2.4

RoHS

The term “RoHS-compatible” shall mean the following:

Components defined as “RoHS-compatible” are compatible with the requirements of Art. 4 of Direc-
tive 2011/65/EU (“RoHS II”) of the European Parliament and of the Council on the restriction of the 
use of certain hazardous substances in electrical and electronic equipment of 8 June 2011 and with 
the requirements of the provisions which will result from transposition of RoHS II into national law 
to the extent such provisions reflect the directive.

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Important notes 

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Cautions and warnings 

on page 609.

“RoHS-compatible” components do not contain any of the following substances at a content 
exceeding the maximum concentration limits of 0.1 % for lead, mercury, hexavalent chromium, 
PBB, PBDE, and 0.01 % for cadmium at a homogeneous material level, except the application is 
exempted by Annex III of “RoHS II”.

2.5

REACH

According to Art. 33 we are obliged to inform our customers immediately or on request a consumer 
within 45 days if we get knowledge that a Substance of Very High Concern (SVHC) is contained 
in a product or it’s packaging with more than 0,1 % w/w. Provided this substance is published by 
the European Chemical Agency via the candidates list. Respective information is provided via 
www.epcos.com/reach (Link: REACH Candidates List and Information according REACH Art. 33, 
concerning EPCOS Products).

2.6

Banned and hazardous substances in components

As a manufacturer of passive components, we develop our products on the basis of sustainability.

In order to establish a standardized procedure for EPCOS worldwide, a material compliance 
management and a mandatory list of banned and declarable substances and substances of special 
interest (EPCOS BAD-SL) are part of our quality management system. The planning and 
development instructions include regulations and guidelines that aim to identify environmental 
aspects and to optimize products and processes with respect to material use and environmental 
compliance, to design them with sparing use of resources and to substitute hazardous substances 
as far as possible.

Consideration of the environmental aspects is checked and recorded in the design reviews: 
the environmental officer provides support in the assessment of the environmental impacts of 
a development project.

2.7

Material data sheets for product families

EPCOS posts material data sheets on the Internet (www.epcos.com/material) that show typical 
compositions of product groups by selected representatives. The materials are listed with their 
percentage weight distribution referred to the respective component.

As per IEC/PAS 61906, all materials with a weight percentage exceeding 0.1 % are listed. All 
specifications are typical data and may vary slightly within a product group or production lot.

The material data sheets do not represent guaranteed properties, but are merely given for purposes 
of information.

Please note in this connection the “Important notes” on page 2.

2.8

Disposal

All ferrite cores and accessories can be disposed of, reused or recycled. However as disposal is 
regulated by national law, the respective national provisions have to be observed.

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Standards and specifications

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1

IEC  standards

PIease refer also the latest CO publications (www.iec.ch)

Standard

Title

IEC 60133 Ed. 4.0

Dimensions of pot cores made of magnetic oxides and associated 
parts (will be replaced by IEC 62317-2)

IEC 60205 Ed.3.0

Calculation of the effective parameters of magnetic piece parts

IEC 60401-1 Ed. 1.0

Terms and nomenclature for cores made of magnetically soft ferrites 
– Part 1: Terms used for physical irregularities 

IEC 60401-2 Ed. 1.0

Terms and nomenclature for cores made of magnetically soft ferrites 
– Part 2: Reference of dimensions

IEC 60401-3 Ed. 1.0

Terms and nomenclature for cores made of magnetically soft ferrites 
– Part 3: Guidelines on the format of data appearing in manufacturers’ 
catalogues of transformers and inductor cores

IEC 60424-1 Ed. 1.0

Ferrite cores – Guide on the limits of surface irregularities – Part 1: 
General specification

IEC 60424-2 Ed. 1.0

Guidance of the limits of surface irregularities of ferrite cores – Part 2: 
RM cores

IEC 60424-3 Ed. 1.0

Ferrite cores – Guide on the limits of surface irregularities – Part 3: 
ETD cores and E cores 

IEC 60424-4 Ed. 1.0

Ferrite cores – Guide on the limits of surface irregularities – Part 4: 
Ring cores

IEC 60647 Ed. 1.0

Dimensions for magnetic oxide cores intended for use in power 
supplies (EC cores) (will be replaced by IEC 62317-11)

IEC 60732 Ed. 1.0

Measuring methods for cylinder cores, tube cores and screw cores of 
magnetic oxides

IEC 61185 Ed. 2.0

Magnetic oxide cores (ETD cores) intended for use in power supply 
applications – Dimensions (will be replaced by IEC 62317-6)

IEC 61246 Ed. 1.1

Magnetic oxide cores (E cores) of rectangular cross-section and 
associated parts – Dimensions (will be replaced by IEC 62317-8)

IEC 61247 Ed. 

1.0

PM cores made of magnetic oxides and associated parts – 
Dimensions (will be replaced by IEC 63217-10)

IEC 61332 Ed. 2.0

Soft ferrite material classification

IEC 61333 Ed. 1.0

Marking on U and E ferrite cores

IEC 61596 Ed. 1.0

Magnetic oxide EP cores and associated parts for use in inductors 
and transformers – Dimensions (will be replaced by IEC 62317-5)

Standards and specifications

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Standards and specifications

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1.1

Quality assessment

The IEC standards mainly specify dimensions, designations and magnetic characteristics, whereas 
the European system of quality assessment CECC and the harmonized DIN-CECC standards 
additionally define methods of measurement and quality levels.

Since 1982 the IEC has been establishing the so-called IEC Q-system, which will have worldwide 
applicability. German DIN IEC standards are being harmonized with this quality system.

CECC and IEC-Q standards have a similar structure: they are subdivided into generic specifications 
(GS), sectional specifications (SS) and blank detail specifications (BDS). The numbering system of 
QC is analogous to that of CECC.

The detail specifications of CECC and IEC do not fully correspond to each other.

A quality assessment system of “Capability Approval” for the production of ferrite parts is being 
established.

IEC 61631 Ed. 1.0

Test method for the mechanical strength of cores made of magnetic 
oxides

IEC  62044-1 Ed. 1.0

Cores made of soft magnetic materials – Measuring methods – Part 1: 
Generic specification

IEC  62044-2 Ed. 1.0

Cores made of soft magnetic materials – Measuring methods – Part 2: 
Magnetic properties at low excitation level

IEC  62044-3 Ed. 1.0

Cores made of soft magnetic materials – Measuring methods – Part 3: 
Magnetic properties at high excitation level

IEC 62317-4 Ed. 1.0

Ferrite cores – Dimensions – Part 4: RM cores and associated parts 
(replaces IEC 60431 Ed. 2.0)

IEC 62317-7 Ed. 1.0

Ferrite cores – Dimensions – Part 7: EER cores

IEC 62317-9 

Ed. 

1.0

Ferrite cores – Dimensions – Part 9: Planar cores (replaces 
IEC 61860 Ed. 1.0: Dimensions of low-profile cores made of magnetic 
oxides)

IEC 62323 Ed. 1.0

Dimensions of half pot cores made of magnetic oxides for inductive 
proximity switches (will be replaced by IEC 62317-3)

IEC 62358 Ed. 1.0

Ferrite cores – Standard inductance factor (A

L

) and its tolerance

IEC/TR 61604 Ed. 1.0

Dimensions of uncoated ring cores of magnetic oxides (will be 
replaced by IEC 62317-12)

Standard

Title

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RM cores

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1

General information

The demand for coil formers with integrated pins for efficient winding gave rise to the development 
of compact RM (

R

ectangular 

M

odular) cores. Furthermore, this design allows high PCB packing 

densities. RM coil formers and accessories are suited to automatic processing.

During assembly, RM cores are held in place by clamps which engage in recesses in the core base. 
The various clamping forces defined, which have been verified by EPCOS through measurements, 
are specified in the individual data sheets.

The core dimensions are matched to standard PCB grids. RM 6 means, for example, that the core 
with coil former fills a square basic area 6

u

6 modules (1 module   2,54 mm) = 15,24

u

15,24 mm

2

.

The mainly used core sizes RM 4 through RM 14 are specified in IEC 62317.

2

Applications

Originally RM cores from Siemens (today EPCOS) were essentially designed for two major 
applications, i. e.
– very low-loss, highly stable filter inductors and other resonance determining inductors

(materials N48, M33 and K1) and

– low-distortion broadband transmission at low signal modulation

(materials T66, T38, T57, N30).

Even today there is still a high demand for RM cores suited to these applications.

RM cores are increasingly required for power applications. For this purpose our core series made 
of materials N87, N92, N97 and N49 (ungapped) is particularly well suited. Matching coil formers 
with larger pin spacings are available. RM cores without center hole (higher A

L

 value and greater 

power capacity) are used for transformer applications.

Our product range also includes low-profile RM cores, whose significantly reduced overall height 
makes them suitable for small-signal, interface and matching transformers and also for trans-
former and energy storage chokes in DC/DC converters with a high pulse rate (materials N87 
and N49). The low-profile types are particularly suited for applications where the winding is print-
ed onto the PCB and the core is fitted to the board from either side.

In addition to conventional accessories, SMD coil formers are available for RM 4 LP, RM 5 and 
RM 6.

RM cores with or without center hole can be supplied in any material on request.

For power applications, particularly for compact energy storage chokes, we supply the RM 12 
and RM 14 cores with optimized, strengthened base thickness.

General information

RM cores

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RM cores

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

3

Coil formers for automatic processing

Automated manufacture is gaining more and more importance for the low-cost production of induc-
tive components. The prerequisites are high-performance winding and assembly machines on the 
one hand, and suitable accessories on the other.

The new EPCOS RM coil formers were developed to meet this demand. These coil formers are 
not only matched to the versatile concepts of automation, but also offer advantages for manual 
winding. The essential improvements of the version optimized for automatic processing will be 
described in the following, taking the example of an RM6 coil former. The consistent utilization of 
these benefits will in most cases bring about a reduction of production costs for inductors and 
transformers.

Squared pins or pin squared in the start-of-
winding area:

Secure restraint of the ends of the winding 
even with 2 to 3 winding corners; the winding 
process is considerably accelerated.

Internal diameter slightly conical and highly 
accurate:

Easy and fast slipping-on and snug fit on the 
winding tools.

Shortened wire guidance slots:

Substantially higher flange breaking strength.

Almost parallel flanges with minimum radii at 
the winding cylinder to the flange:

Correct winding layers, more turns, neat and 
rapid winding.

V-shaped slot in the pinless flange:

Automatic loading and unloading of winding 
machine possible. Substantially more accurate 
fixing and arrangement of the coil formers.

Lengthened wire catching nose:

Leads all wires safely into the wire guidance 
slots, even at high winding speed.

Pinless flange without marking:

Substantially more accurate arrangement of 
the coil formers for winding and wrapping.

Slot outlet stepped in height:

Owing to the transfer of the wire crossing to the 
level of the slot, short circuit is prevented when 
soldering the ends of the winding to the pins.

Insulation web:

Improved insulation between the winding wires 
and the ferrite core.

Section A–B

General information

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Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

    

Example of an assembly set

Individual parts

Part no.

Page

Adjusting screw

B65539

B65806

208

Core

B65803

204

Clamps

B65806

207

Insulating washer 1

Coil former

B65804

206

Core

B65803

204

Threaded sleeve (glued-in)

Insulating washer 2

B65804

207

Also available:

RM 4 low profile:

Core

B65803P

209

Clamp

B65804

210

Insulating washer

B65804

210

SMD coil former

B65804

211

RM 4 through RM 14

Core and accessories

RM 4

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-4

Core without center hole

for transformer applications

Delivery mode: sets

Magnetic characteristics

 (per set)         

Approx. weight

 (per set)         

Gapped

with

center hole

without

center hole

6

l

/

A

l

e

A

e

A

min

V

e

1.9

21

11



231

1.7

22

13

11.3

286

mm

–1

mm

mm

2

mm

2

mm

3

m

1.45

1.65

g

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

1)

-A with center hole

-N with threaded sleeve

K1

16 

r

3%

1.0

24.2

B65803+0016A001

25 

r

3%

0.40

37.8

B65803+0025A001

M33

40

r

3%

0.36

60.4

B65803+0040A033

63 

r

3%

0.18

96

B65803+0063A033

N48

63 

r

3%

0.16

96

B65803+0063A048

100 

r

3%

0.10

152

B65803+0100A048

160 

r

3%

0.06

243

B65803+0160A048

1) Replace the + by the code letter “A” or “N” for the required version.

B65803

Core

RM 4

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

-J without center hole

N45

1700 +30/–20%

2290

B65803J0000R045

N30

1900 +30/–20%

2560

B65803J0000R030

T35

2800 +40/–30%

3770

B65803J0000Y035

T38

3700 +40/–30%

4980

B65803J0000Y038

N49

750 +30/–20%

1010

< 0.04 ( 50 mT, 500 kHz, 100

q

C)

B65803J0000R049

N87

1100 +30/–20%

1480

< 0.20 (200 mT, 100 kHz, 100

q

C)

B65803J0000R087

N97

1100 +30/–20%

1480

< 0.15 (200 mT, 100 kHz, 100

q

C)

B65803J0000R097

B65803

Core

RM 4

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180

q

C), color code white

Bakelite UP 3420

®

>

E61040 (M)

@

, HEXION SPECIALTY CHEMICALS GMBH

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 171

Pins squared in the start-of-winding area.
For matching clamp and insulating washers see page 207.

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Pins

Ordering code

1

7.7

20

89

5

B65804P1005D001

6

B65804D1006D001

B65804

Accessories

RM 4

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Clamp

With ground terminal, made of stainless spring steel (tinned), 0.3 mm thick

Solderability to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Also available as strip clamp on reels on request

Insulating washer 

for double-clad PCBs

Made of polycarbonate (UL 94 V-0, insulation class to IEC 60085: E   120

q

C), 0.3 mm thick

Makrofol FR7-2, 

>

E118859 (M)

@

, natural color, BAYER MATERIALSCIENCE AG

Clamp

Insulating washer

Clamping forces for RM 4    

Ordering code

Clamp (ordering code per piece, 2 are required)

B65806B2203X000

Insulating washer (bulk)

B65804C2005X000

F

min

: Extension of clamp from a to a

2

 = X

min

F

max

: Extension of clamp from a to a

1

 = X

max

Clamp opening a (mm)

  8.3 +0.15

Core nose Z

max 

(mm)

 0.15

Height of core pair X (mm) X

min 

X

max

 8.75

 9.25

Clamping force F (N)

F

min 

F

max

  5

40

B65804, B65806

Accessories

RM 4

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Adjusting screw

Tube core with thread and core brake made of GFR polyterephthalate

Pocan B3235

®

>

E245249 (M)

@

, LANXESS AG

a

b

     

Figure

Tube core

Ordering code

‡ u

 length (mm) Material

Color code

a

1.81 

u

 2.0

K1

yellow

B65539C1003X001

a

1.81 

u

 2.7

N22

red

B65539C1002X022

b

1.81 

u

 3.4

N22

green

B65806C3001X022

B65539, B65806

Accessories

RM 4

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-4         

For compact transformers with high inductance

Without center hole

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 1.2 mm

–1

l

e

= 17.3 mm

A

e

= 14.5 mm

2

A

min

= 11.3 mm

2

V

e

= 251 mm

3

Approx. weight

 1.2 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

T38

5000 +40/–30%

4750

B65803P0000Y038

N49

950 +30/–20%

900

< 0.04 ( 50 mT, 500 kHz, 100

q

C)

B65803P0000R049

N92

1000 +30/–20%

950

< 0.14 (200 mT, 100 kHz, 100

q

C)

B65803P0000R092

N87

1300 +30/–20%

1230

< 0.12 (200 mT, 100 kHz, 100

q

C)

B65803P0000R087

B65803P

Core

RM 4 »Low Profile«

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Clamp

With ground terminal, made of stainless spring steel (tinned), 0.3 mm thick,

Without ground terminal, made of stainless spring steel, 0.3 mm thick

Solderability to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Clamping force 40 N per pair of clamps (typical value)

Also available as strip clamp on reels on request

Insulating washer 

for double-clad PCBs

Made of polycarbonate (UL 94 V-0, insulation class to IEC 60085: E   120

q

C), 0.3 mm thick

Makrofol FR7-2, 

>

E118859 (M)

@

, natural color, BAYER MATERIALSCIENCE AG  

Clamp with ground terminal

     

Clamp without ground terminal

Insulating washer

Ordering code

Clamp with ground terminal (ordering code per piece, 2 are required)

B65804P2203X000

Clamp without ground terminal (ordering code per piece, 2 are required) B65804P2204X000

Insulating washer (bulk)

B65804C2005X000

B65804

Accessories for PTH applications

RM 4 »Low Profile«

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

SMD coil former with J terminals

Material:

GFR liquid crystal polymer (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155

q

C), color code black

Vectra C 130 

>

E83005 (M)

@

, TICONA

Solderability: to IEC 60068-2-58, test Td, method 6 (Group 3): 245

q

C, 3 s

Resistance to soldering heat: to IEC 60068-2-58, test Td, method 6 (Group 3): 255

q

C, 10 s

permissible soldering temperature for wire-wrap connection on coil former: 400

q

C, 1 s

Winding:

see 

“Processing notes”

, page 179

Clamp

Without ground terminal, made of stainless spring steel, 0.3 mm thick

Also available as strip clamp (each carton containing 2 reels)

Coil former

         

Clamp

1) 6 and 8 terminals on request

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Terminals

1)

Ordering code

1

5.0

20.1

138

10

B65804B6010T001

Clamp

(ordering code per piece, 2 are required)

B65804P2204X000

Recommended

PCB layout

B65804

Accessories

RM 4 »Low Profile«

epcos-ferrites-and-accessories-html.html
background image

212

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

    

Example of an assembly set

Individual parts

Part no.

Page

Adjusting screw

B65539

B65806

219

Core

B65805

213

Clamps

B65806

216

Insulating washer 1

B65806

216

Coil former

B65806

215

Core

B65805

213

Threaded sleeve (glued-in)

Insulating washer 2

B65806

216

Also available:

SMD coil formers

B65822

217, 218

Clamps

B65806

217, 218

RM 5 low profile:

Core

B65805P

220

Core and accessories

RM 5

epcos-ferrites-and-accessories-html.html
background image

213

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-4

Core without center hole

for transformer applications

Delivery mode: sets

Magnetic characteristics

 (per set)

Approx. weight

 (per set)

Gapped

with

center hole

without

center hole

6

l

/

A

l

e

A

e

A

min

V

e

1.0

20.8

20.8

433

0.93

22.1

23.8

18

526

mm

–1

mm

mm

2

mm

2

mm

3

m

2.9

3.0

g

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

1)

-C with center hole

-N with threaded sleeve

K1

25 

r

3%

1.0

19.9

B65805+0025A001

40 

r

3%

0.40

31.8

B65805+0040A001

M33

63

r

3%

0.4

50.2

B65805+0063A033

100 

r

3%

0.2

79.6

B65805+0100A033

N48

160 

r

3%

0.12

127

B65805+0160A048

250 

r

3%

0.06

199

B65805+0250A048

315 

r

3%

0.03

251

B65805+0315A048

1) Replace the + by the code letter “C” or “N” for the required version.

B65805

Core

RM 5

epcos-ferrites-and-accessories-html.html
background image

214

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

-C with center hole

-J without center hole

N48

1800 +30/–20%

1430

B65805C0000R048

N45

2600 +30/–20%

1920

B65805J0000R045

N30

3500 +30/–20%

2590

B65805J0000R030

T38

6700 +40/–30%

4950

B65805J0000Y038

T66

9600 +40/–30%

7090

B65805J0000Y066

N49

1300 +30/–20%

  960

< 0.06 ( 50 mT, 500 kHz, 100

q

C)

B65805J0000R049

N87

2000 +30/–20%

1480

< 0.32 (200 mT, 100 kHz, 100

q

C)

B65805J0000R087

N97

2000 +30/–20%

1480

< 0.24 (200 mT, 100 kHz, 100

q

C)

B65805J0000R097

N41

2600 +30/–20%

1920

< 0.10 (200 mT, 100 kHz, 100

q

C)

B65805J0000R041

B65805

Core

RM 5

epcos-ferrites-and-accessories-html.html
background image

215

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180

q

C), color code white

Bakelite UP 3420

®

>

E61040 (M)

@

, HEXION SPECIALTY CHEMICALS GMBH

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 171

Pins squared in the start-of-winding area.
For matching clamps and insulating washers see page 216.

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Pins

Ordering code

1

9.5

25

90

4

B65806P1004D001

5

B65806P1005D001

6

B65806P1006D001

8

B65806P1008D001

2

8.7

25

94

6

B65806P1006D002

B65806

Accessories

RM 5

epcos-ferrites-and-accessories-html.html
background image

216

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Clamp

With ground terminal, made of stainless spring steel (tinned), 0.3 mm thick

Solderability to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Also available as strip clamp on reels on request

Insulating washer 1

 between core and coil former

For tolerance compensation and for insulation

Made of polyarylate film (UL 94 V-0, insulation class to IEC 60085: E   120

q

C), 0.08 mm thick

Aryphan F685, 

>

E167358 (M)

@

, natural color, LOFO HIGH TECH FILM GMBH

Insulating washer 2

 for double-clad PCBs

Made of polycarbonate (UL 94 V-0, insulation class to IEC 60085: E   120

q

C), 0.25 mm thick

Makrofol FR7-2, 

>

E118859 (M)

@

, natural color, BAYER MATERIALSCIENCE AG

Clamp

Insulating washer 1

Insulating washer 2

Clamping forces for RM 5

Ordering code

Clamp (ordering code per piece, 2 are required)

B65806B2203X000

Insulating washer 1 (reel packing, PU = 1 reel)

B65806A5000X000

Insulating washer 2 (bulk)

B65806D2005X000

(preliminary data)

F

min

: Extension of clamp from a to a

2

 = X

min

F

max

: Extension of clamp from a to a

1

 = X

max

Clamp opening a (mm)

  8.3 +0.15

Core nose Z

max 

(mm)

 0.15

Height of core pair X (mm) X

min 

X

max 

 8.75

 9.25

Clamping force F (N)

F

min 

F

max 

  5

40

B65806

Accessories

RM 5

epcos-ferrites-and-accessories-html.html
background image

217

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

SMD coil former with gullwing terminals

Material:

GFR liquid crystal polymer (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155

q

C), color code black

Vectra C 130 

>

E83005 (M)

@

, TICONA

Solderability: to IEC 60068-2-58, test Td, method 6 (Group 3): 245

q

C, 3 s

Resistance to soldering heat: to IEC 60068-2-58, test Td, method 6 (Group 3): 255

q

C, 10 s

permissible soldering temperature for wire-wrap connection on coil former: 400

q

C, 1 s

Winding:

see 

“Processing notes”

, page 179

Clamp

Without ground terminal, made of stainless spring steel, 0.335 mm thick

Also available as strip clamp (each carton containing 2 reels) on request

Coil former

Clamp

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Terminals

Ordering code

1

11.1

25

77

8

B65822F1008T001

2

10.2

25

85

8

B65822F1008T002

Clamp

(ordering code per piece, 2 are required)

B65806J2204X000

B65822, B65806

Accessories

RM 5

epcos-ferrites-and-accessories-html.html
background image

218

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

SMD coil former with J terminals

Material:

GFR liquid crystal polymer (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155

q

C), color code black

Vectra C 130 

>

E83005 (M)

@

, TICONA

Solderability: to IEC 60068-2-58, test Td, method 6 (Group 3): 245

q

C, 3 s

Resistance to soldering heat: to IEC 60068-2-58, test Td, method 6 (Group 3): 255

q

C, 10 s

permissible soldering temperature for wire-wrap connection on coil former: 400

q

C, 1 s

Winding:

see 

“Processing notes”

, page 179

Clamp

Without ground terminal, made of stainless spring steel, 0.335 mm thick

Also available as strip clamp (each carton containing 2 reels) on request

Coil former

         

Clamp

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Terminals

Ordering code

1

11.1

25

73

8

B65822J1008T001

Clamp

(ordering code per piece, 2 are required)

B65806J2204X000

B65822, B65806

Accessories

RM 5

epcos-ferrites-and-accessories-html.html
background image

219

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Adjusting screw

Tube core with thread and core brake made of GFR polyterephthalate

Pocan B3235

®

>

E245249 (M)

@

, LANXESS AG

a

b

Figure

Tube core

Ordering code

‡ u

 length (mm) Material

Color code

a

1.81 

u

 2.0

K1

yellow

B65539C1003X001

a

1.81 

u

 2.7

N22

red

B65539C1002X022

b

1.81 

u

 3.4

N22

green

B65806C3001X022

B65539, B65806

Accessories

RM 5

epcos-ferrites-and-accessories-html.html
background image

220

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-4

For compact transformers

Without center hole

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.71 mm

–1

l

e

= 17.5 mm

A

e

= 24.5 mm

2

A

min

= 18 mm

2

V

e

= 430 mm

3

Approx. weight

 2.6 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

T38

1)

7700 +40/–30%

4380

B65805P0000Y038

N49

1700 +30/–20%

970

< 0.09 ( 50 mT, 500 kHz, 100

q

C)

B65805P0000R049

N92

1900 +30/–20%

1080

< 0.29 (200 mT, 100 kHz, 100

q

C)

B65805P0000R092

N87

2400 +30/–20%

1360

< 0.26 (200 mT, 100 kHz, 100

q

C)

B65805P0000R087

1) Preliminary data

B65805P

Core

RM 5 »Low Profile«

epcos-ferrites-and-accessories-html.html
background image

221

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

    

Example of an assembly set

Individual parts

Part no.

Page

Adjusting screw

B65659

230

Core

B65807

222

Clamps

B65808

228

Insulating washer 1

B65808

228

Coil former

B65808

224, 225

Core

B65807

222

Threaded sleeve (glued-in)

Insulating washer 2

B65808

228

Also available:

Coil former for SMPS transf.

B65808

226

Coil former for

power applications

B65808

227

SMD coil former

B65821

229

Clamp

B65808

229

RM 6 low profile:

Core

B65807P

231

Core and accessories

RM 6

epcos-ferrites-and-accessories-html.html
background image

222

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-4

Core without center hole

for transformer applications

Delivery mode: sets

Magnetic characteristics

 (per set)

Approx. weight

 (per set)

Gapped

with

center hole

without

center hole

6

l

/

A

l

e

A

e

A

min

V

e

0.86

26.9

31.3

840

0.78

28.6

36.6

31

1050

mm

–1

mm

mm

2

mm

2

mm

3

m

4.9

5.1

g

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

1)

-J without center hole

-N with threaded sleeve

-C with center hole

K1

40 

r

3%

0.80

27.4

B65807+0040A001

M33

63

r

3%

0.60

43.2

B65807+0063A033

100 

r

3%

0.38

68.5

B65807+0100A033

N48

160 

r

3%

0.22

109

B65807+0160A048

250 

r

3%

0.12

171

B65807+0250A048

315 

r

3%

0.08

215

B65807+0315A048

400 

r

3%

0.05

274

B65807+0400A048

N41

250 

r

3%

0.17

155

B65807J0250A041

1) Replace the + by the code letter “C” or “N” for the required version. Standard version is “C”.

B65807

Core

RM 6

epcos-ferrites-and-accessories-html.html
background image

223

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

-C with center hole

-J without center hole

N48

2200 +30/–20%

1500

B65807C0000R048

N45

3500 +30/–20%

2180

B65807J0000R045

N30

4300 +30/–20%

2670

B65807J0000R030

T35

6200 +30/–20%

3860

B65807J0000R035

T38

8600 +40/–30%

5350

B65807J0000Y038

T66

12300 +40/–30%

7650

B65807J0000Y066

N49

1700 +30/–20%

1060

< 0.15 ( 50 mT, 500 kHz, 100

q

C)

B65807J0000R049

N87

2400 +30/–20%

1490

< 0.51 (200 mT, 100 kHz, 100

q

C)

B65807J0000R087

N97

2400 +30/–20%

1490

< 0.39 (200 mT, 100 kHz, 100

q

C)

B65807J0000R097

N41

3100 +30/–20%

1930

< 0.16 (200 mT,  25 kHz, 100

q

C)

B65807J0000R041

B65807

Core

RM 6

epcos-ferrites-and-accessories-html.html
background image

224

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former, squared pins

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180

q

C), color code black

Sumikon PM 9630

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 171

For matching clamp and insulating washers see page 228.

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Pins

Ordering code

1

15

30

69

4

B65808N1004D001

5

B65808N1005D001

6

B65808N1006D001

2

14

30

73

4

B65808N1004D002

6

B65808N1006D002

B65808

Accessories

RM 6

epcos-ferrites-and-accessories-html.html
background image

225

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former, pins squared in the start-of-winding area

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180

q

C), color code white

Bakelite UP 3420

®

>

E61040 (M)

@

, HEXION SPECIALTY CHEMICALS GMBH

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 171

For matching clamp and insulating washers see page 228.

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Pins

Ordering code

1

15

30

69

4

B65808P1004D001

5

B65808P1005D001

6

B65808P1006D001

B65808

Accessories

RM 6

epcos-ferrites-and-accessories-html.html
background image

226

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former for SMPS transformers with line isolation

The creepage distances and clearances are designed such that the coil former is suitable for use 
in SMPS transformers with line isolation.

Closed center flange with external wire guide

Pins squared in the start-of-winding area

Optimized for use with automatic winding machines

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155

q

C), color code black

Sumikon PM 9630

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 171

    

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Pins

Ordering code

2

14

30

73

8

B65808S1108D002

B65808

Accessories

RM 6

epcos-ferrites-and-accessories-html.html
background image

227

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former for power applications with angled pins

Optimized for automatic winding
Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155

q

C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 171

For matching clamp and insulating washer 1 see page 228.         

    

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Pins

Ordering code

1

15

30

69

8

B65808E1508T001

Hole arrangement

View in mounting direction

B65808

Accessories

RM 6

epcos-ferrites-and-accessories-html.html
background image

228

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Clamp

With ground terminal, made of stainless spring steel (tinned), 0.4 mm thick

Solderability to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Also available as strip clamp on reels on request

Insulating washer 1

 between core and coil former

For tolerance compensation and for insulation

Made of polycarbonate (UL 94 V-0, insulation class to IEC 60085: E   120

q

C), 0.08 mm thick

Aryphan F685, 

>

E167358 (M)

@

, natural color, LOFO HIGH TECH FILM GMBH

Insulating washer 2

 for double-clad PCBs

Made of polycarbonate (UL 94 V-0, insulation class to IEC 60085: E   120

q

C), 0.25 mm thick

Makrofol FR7-2, 

>

E118859 (M)

@

, natural  color, BAYER MATERIALSCIENCE AG      

Clamp

Insulating washer 1

Insulating washer 2

Clamping forces for RM 6    

Ordering code

Clamp (ordering code per piece, 2 are required)

B65808B2203X000

Insulating washer 1 (reel packing, PU = 1 reel)

B65808A5000X000

Insulating washer 2 (bulk)

B65808C2005X000

(preliminary data)

F

min

: Extension of clamp from a to a

2

 = X

min

F

max

: Extension of clamp from a to a

1

 = X

max

Clamp opening a (mm)

  9.5 +0.2

Core nose Z

max 

(mm)

 0.22

Height of core pair X (mm) X

min 

X

max 

10.1

10.6

Clamping force F (N)

F

min 

F

max 

  7

50

B65808

Accessories

RM 6

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background image

229

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

SMD coil former with gullwing terminals

Material:

GFR liquid crystal polymer (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155

q

C), color code black

Vectra E 130i 

>

E106764 (M)

@

, POLYPLASTICS CO LTD

Vectra E 130i 

>

E83005 (M)

@

, TICONA

Solderability: to IEC 60068-2-58, test Td, method 6 (Group 3): 245

q

C, 3 s

Resistance to soldering heat: to IEC 60068-2-58, test Td, method 6 (Group 3): 255

q

C, 10 s

permissible soldering temperature for wire-wrap connection on coil former: 400

q

C, 1 s

Winding:

see 

“Processing notes”

, page 179

Clamp

Without ground terminal, made of stainless spring steel, 0.435 mm thick

Also available as strip clamp on request

Coil former

Clamp

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Terminals

Ordering code

1

16.2

31

66

8

B65821C1008T001

Clamp

(ordering code per piece, 2 are required)

B65808J2204X000

B65821, B65808

Accessories

RM 6

epcos-ferrites-and-accessories-html.html
background image

230

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Adjusting screw

Tube core with thread and core brake made of GFR polyterephthalate

Pocan B3235

®

>

E245249 (M)

@

, LANXESS AG

a

b

c

Figure

Tube core

Ordering code

‡ u

 length (mm) Material

Color code

a

2.62 

u

 3.6

N22

red

B65659F0001X023

b

2.75 

u

 4.4

N22

black

B65659F0003X023

c

2.82 

u

 4.4

N22

yellow

B65659F0004X023

B65659

Accessories

RM 6

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background image

231

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-4

For compact transformers

Without center hole

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.58 mm

–1

l

e

= 21.8 mm

A

e

= 37.5 mm

2

A

min

= 31.2 mm

2

V

e

= 820 mm

3

Approx. weight

 4.0 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

T38

10500 +40/–30%

4860

B65807P0000Y038

N49

2200 +30/–20%

1020

< 0.14 ( 50 mT, 500 kHz, 100

q

C)

B65807P0000R049

N92

2300 +30/–20%

1060

< 0.44 (200 mT, 100 kHz, 100

q

C)

B65807P0000R092

N87

3000 +30/–20%

1390

< 0.40 (200 mT, 100 kHz, 100

q

C)

B65807P0000R087

B65807P

Core

RM 6 »Low Profile«

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background image

232

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Example of an assembly set

Individual parts

Part no.

Page

Adjusting screw

B65659

236

Core

B65819

233

Clamps

B65820

235

Insulating washer 1

B65820

235

Coil former

B65820

234

Core

B65819

233

Threaded sleeve (glued-in)

Insulating washer 2

B65820

235

Also available:

RM 7 low profile:

Core

B65819P

237

Core and accessories

RM 7

epcos-ferrites-and-accessories-html.html
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233

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-4

Core without center hole

for transformer applications

Delivery mode: sets

Magnetic characteristics

 (per set)         

Approx. weight

 (per set)

Gapped

Ungapped

with

center hole

without

center hole

6

l

/

A

l

e

A

e

A

min

V

e

0.75

29.8

40



1190

0.7

30.4

43

39

1310

mm

–1

mm

mm

2

mm

2

mm

3

m

6.5

7.2

g

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

1)

-A with center hole

-N with threaded sleeve

-J without center hole

N41

160 

r

5%

0.30

90

B65819J0160J041

250 

r

5%

0.18

141

B65819J0250J041

N48

250

r

3%

0.16

148

B65819+0250A048

315 

r

3%

0.12

187

B65819+0315A048

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

-J without center hole

N30

5000 +30/–20%

2810

B65819J0000R030

T38

10000 +40/–30%

5630

B65819J0000Y038

N49

1900 +30/–20%

1070

< 0.22 ( 50 mT, 500 kHz, 100

q

C)

B65819J0000R049

N87

2700 +30/–20%

1520

< 0.77 (200 mT, 100 kHz, 100

q

C)

B65819J0000R087

N97

2700 +30/–20%

1520

< 0.58 (200 mT, 100 kHz, 100

q

C)

B65819J0000R097

1) Replace the + by the code letter “A” or “N” for the required version.

B65819

Core

RM 7

epcos-ferrites-and-accessories-html.html
background image

234

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180

q

C), color code black

Sumikon PM 9630

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 171

Squared pins.
For matching clamp and insulating washers see page 235.

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Pins

Ordering code

1

22.4

36.0

55.4

8

B65820W1008D001

2

21.9

36.0

56.5

8

B65820W1008D002

B65820

Accessories

RM 7

epcos-ferrites-and-accessories-html.html
background image

235

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Clamp

With ground terminal, made of spring steel (tinned), 0.4 mm thick

Solderability to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Insulating washer 1

 between core and coil former

For tolerance compensation and for insulation

Made of polycarbonate (UL 94 V-0, insulation class to IEC 60085: E   120

q

C), 0.08 mm thick

Aryphan F685, 

>

E167358 (M)

@

, natural color, LOFO HIGH TECH FILM GMBH

Insulating washer 2

 for double-clad PCBs

Made of polycarbonate (UL 94 V-0, insulation class to IEC 60085: E   120

q

C), 0.3 mm thick

Makrofol FR7-2, 

>

E118859 (M)

@

, natural color, BAYER MATERIALSCIENCE AG   

Clamp

Insulating washer 1

Insulating washer 2

Ordering code

Clamp (ordering code per piece, 2 are required)

B65820B2001X000

Insulating washer 1 (reel packing, PU = 1 reel)

B65820A5000X000

Insulating washer 2 (bulk)

B65820D2005X000

(preliminary data)

B65820

Accessories

RM 7

epcos-ferrites-and-accessories-html.html
background image

236

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Adjusting screw

Tube core with thread and core brake made of GFR polyterephthalate

Pocan B3235

®

>

E245249 (M)

@

, LANXESS AG

a

b

Figure

Tube core

Ordering code

‡ u

 length (mm) Material

Color code

a

2.62 

u

 3.6

N22

red

B65659F0001X023

b

2.75 

u

 4.4

N22

black

B65659F0003X023

B65659

Accessories

RM 7

epcos-ferrites-and-accessories-html.html
background image

237

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-4

For compact transformers

Without center hole

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.52 mm

–1

l

e

= 23.5 mm

A

e

= 45.3 mm

2

A

min

= 39.6 mm

2

V

e

= 1060 mm

3

Approx. weight

 5.7 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

T38

11500 +40/–30%

4750

B65819P0000Y038

N49

2400 +30/–20%

990

< 0.21 ( 50 mT, 500 kHz, 100

q

C)

B65819P0000R049

N92

2600 +30/–20%

1070

< 0.63 (200 mT, 100 kHz, 100

q

C)

B65819P0000R092

N87

3300 +30/–20%

1360

< 0.57 (200 mT, 100 kHz, 100

q

C)

B65819P0000R087

B65819P

Core

RM 7 »Low Profile«

epcos-ferrites-and-accessories-html.html
background image

238

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

    

Example of an assembly set         

Individual parts

Part no.

Page

Adjusting screw

B65812

246

Core

B65811

239

Clamps

B65812

245

Insulating washer 1

B65812

245

Coil former

B65812

241, 242

Core

B65811

239

Threaded sleeve (glued-in)

Insulating washer 2

B65812

245

Also available:

Coil former for

SMPS transformers

B65812

243

Coil former for

power applications

B65812

244

RM 8 low-profile:

Core

B65811P

247

Clamp

B65812

248

Insulating washers 1 + 2

B65812

248

Core and accessories

RM 8

epcos-ferrites-and-accessories-html.html
background image

239

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-4

Cores without center hole

for transformer applications

Delivery mode: sets

Magnetic characteristics

 (per set)         

Approx. weight

 (per set)         

Gapped

with

center hole

without

center hole

6

l

/

A

l

e

A

e

A

min

V

e

0.68

35.1

52

1825

0.59

38

64

55

2430

mm

–1

mm

mm

2

mm

2

mm

3

m

10.7

12

g

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

1)

-D with center hole

-F with threaded sleeve

-J without center hole

N48

250 

r

3%

0.23

134

B65811+0250A048

315 

r

3%

0.17

169

B65811+0315A048

400 

r

3%

0.14

215

B65811+0400A048

630 

r

5%

0.10

338

B65811+0630J048

N41

160 

r

3%

0.49

76

B65811J0160A041

250 

r

5%

0.24

118

B65811J0250J041

630 

r

5%

0.11

298

B65811J0630J041

1600 

r

10%

0.04

756

B65811J1600K041

N87

250 

r

3%

0.30

118

B65811J0250A087

400 

r

3%

0.18

189

B65811J0400A087

1) Replace the + by the code letter “F” or “D” for the required version. Standard version is “D”.

B65811

Core

RM 8

epcos-ferrites-and-accessories-html.html
background image

240

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

-D with center hole

-J without center hole

N48

2900 +30/–20%

1550

B65811D0000R048

N30

5700 +30/–20%

2690

B65811J0000R030

T38

12500 +40/–30%

5910

B65811J0000Y038

N49

2200 +30/–20%

1040

< 0.37 ( 50 mT, 500 kHz, 100

q

C)

B65811J0000R049

N87

3300 +30/–20%

1560

< 1.20 (200 mT, 100 kHz, 100

q

C)

B65811J0000R087

N97

3300 +30/–20%

1560

< 1.00 (200 mT, 100 kHz, 100

q

C)

B65811J0000R097

N41

4100 +30/–20%

1940

< 0.37 (200 mT,  25 kHz, 100

q

C)

B65811J0000R041

B65811

Core

RM 8

epcos-ferrites-and-accessories-html.html
background image

241

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former, squared pins

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180

q

C), color code black

Sumikon PM 9630

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 171

For matching clamp and insulating washers see page 245.

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Pins

Ordering code

1

30

42

47

5

B65812N1005D001

8

B65812N1008D001

12

B65812N1012D001

2

28.4

42

50

5

B65812N1005D002

12

B65812N1012D002

Version

Pins omitted

5 pins

8 pins

3, 4, 6, 7, 9, 10, 12

3, 4, 9, 10

B65812

Accessories

RM 8

epcos-ferrites-and-accessories-html.html
background image

242

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former, pins squared in the start-of-winding area

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180

q

C), color code white

Bakelite UP 3420

®

>

E61040 (M)

@

, HEXION SPECIALTY CHEMICALS GMBH

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 171

For matching clamp and insulating washers see page 245.

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Pins

Ordering code

1

30

42

47

5

B65812P1005D001

8

B65812P1008D001

12

B65812P1012D001

2

28.4

42

50

8

B65812P1008D002

Hole arrangement

View in mounting direction

12 pins

Version

Pins omitted

5 pins

8 pins

3, 4, 6, 7, 9, 10, 12

3, 4, 9, 10

B65812

Accessories

RM 8

epcos-ferrites-and-accessories-html.html
background image

243

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former for SMPS transformers with line isolation

The creepage distances and clearances are designed such that the coil former is suitable for use 
in SMPS transformers with line isolation.

Closed center flange with external wire guide

Pins squared in the start-of-winding area

Optimized for use with automatic winding machines

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 180

q

C), color code black

Sumikon PM 9630

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 171

    

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Pins

Ordering code

2

28.4

42

50

8

B65812S1108D002

B65812

Accessories

RM 8

epcos-ferrites-and-accessories-html.html
background image

244

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former for power applications

Optimized for automatic winding
Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155

q

C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 171

For matching clamp and insulating washer 1 see page 245.

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Pins

Ordering code

1

30

42

47

12

B65812C1512T001

Hole arrangement

View in mounting direction

(Note half pitch!)

B65812

Accessories

RM 8

epcos-ferrites-and-accessories-html.html
background image

245

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Clamp

With ground terminal, made of stainless spring steel (tinned), 0.4 mm thick

Solderability to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Also available as strip clamp on reels on request

Insulating washer 1

 between core and coil former

For tolerance compensation and for insulation

Made of polycarbonate (UL 94 V-0, insulation class to IEC 60085: E   120

q

C), 0.08 mm thick

Aryphan F685, 

>

E167358 (M)

@

, natural color, LOFO HIGH TECH FILM GMBH

Insulating washer 2

 for double-clad PCBs

Made of polycarbonate (UL 94 V-0, insulation class to IEC 60085: E   120

q

C), 0.25 mm thick

Makrofol FR7-2, 

>

E118859 (M)

@

, natural color, BAYER MATERIALSCIENCE AG        

Clamp

Ordering code

Clamp (ordering code per piece, 2 are required)

B65812A2203X000

Insulating washer 1 (reel packing, PU = 1 reel)

B65812A5000X000

Insulating washer 2 (bulk)

B65812C2005X000

Insulating washer 1

Insulating washer 2

(preliminary data)

B65812

Accessories

RM 8

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background image

246

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Adjusting screw

Tube core with thread and core brake made of GFR polyterephthalate

Pocan B3235

®

>

E245249 (M)

@

, LANXESS AG

Tube core

Ordering code

‡ u

 length (mm)

Material

Color code

3.85 

u

 5.0

N22

gray

B65812B3003X022

B65812

Accessories

RM 8

epcos-ferrites-and-accessories-html.html
background image

247

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-4

For compact transformers

Without center hole

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.44 mm

–1

l

e

= 28.7 mm

A

e

= 64.9 mm

2

A

min

= 55.4 mm

2

V

e

= 1860 mm

3

Approx. weight

 9.2 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N49

2900 +30/–20%

1020

< 0.33 ( 50 mT, 500 kHz, 100

q

C)

B65811P0000R049

N92

3100 +30/–20%

1090

< 1.10 (200 mT, 100 kHz, 100

q

C)

B65811P0000R092

N87

4100 +30/–20%

1440

< 0.92 (200 mT, 100 kHz, 100

q

C)

B65811P0000R087

B65811P

Core

RM 8 »Low Profile«

epcos-ferrites-and-accessories-html.html
background image

248

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Clamp

With ground terminal, made of stainless spring steel (tinned), 0.4 mm thick

Solderability to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Also available as strip clamp on reels on request

Insulating washer 1

 between core and coil former

For tolerance compensation and for insulation

Made of polycarbonate (UL 94 V-0, insulation class to IEC 60085: E   120

q

C), 0.08 mm thick

Aryphan F685, 

>

E167358 (M)

@

, natural color, LOFO HIGH TECH FILM GMBH

Insulating washer 2

 for double-clad PCBs

Made of polycarbonate (UL 94 V-0, insulation class to IEC 60085: E   120

q

C), 0.25 mm thick

Makrofol FR7-2, 

>

E118859 (M)

@

, natural color, BAYER MATERIALSCIENCE AG

Clamp

Ordering code

Clamp (ordering code per piece, 2 are required)

B65812P2203X000

Insulating washer 1 (reel packing, PU = 1 reel)

B65812A5000X000

Insulating washer 2 (bulk)

B65812C2005X000

Insulating washer 1

(preliminary data)

Insulating washer 2

B65812

Accessories

RM 8 »Low Profile«

epcos-ferrites-and-accessories-html.html
background image

249

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Example of an assembly set

Individual parts

Part no.

Page

Adjusting screw

B65679

255

Core

B65813

250

Clamps

B65814

254

Insulating washer 1

B65814

254

Coil former

B65814

252

Core

B65813

250

Threaded sleeve (glued-in)

Insulating washer 2

B65814

254

Also available:

Coil former for

power applications

B65814

253

RM 10 low-profile:

Core

B65813P

256

Core and accessories

RM 10

epcos-ferrites-and-accessories-html.html
background image

250

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-4

Cores without center hole

for transformer applications

Delivery mode: sets

Magnetic characteristics

 (per set)

Approx. weight

 (per set)         

Gapped

with

center hole

without

center hole

6

l

/

A

l

e

A

e

A

min

V

e

0.5

42

83

3490

0.45

44

98

90

4310

mm

–1

mm

mm

2

mm

2

mm

3

m

20.7

22

g

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

1)

-D with center hole

-N with threaded sleeve

-J without center hole

N48

400 

r

3%

0.21

161

B65813+0400A048

630 

r

3%

0.13

254

B65813+0630A048

N41

250 

r

3%

0.44

89

B65813J0250A041

630 

r

5%

0.13

225

B65813J0630J041

1600 

r

10%

0.04

572

B65813J1600K041

1) Replace the + by the code letter “D” or “N” for the required version.

B65813

Core

RM 10

epcos-ferrites-and-accessories-html.html
background image

251

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

-J without center hole

N30

7600 +30/–20%

2720

B65813J0000R030

T38

16000 +40/–30%

5720

B65813J0000Y038

N49

2900 +30/–20%

1040

< 0.75 ( 50 mT, 500 kHz,100

q

C)

B65813J0000R049

N87

4200 +30/–20%

1500

< 2.30 (200 mT, 100 kHz, 100

q

C)

B65813J0000R087

N97

4200 +30/–20%

1500

< 2.00 (200 mT, 100 kHz, 100

q

C)

B65813J0000R097

N41

5500 +30/–20%

1960

< 0.80 (200 mT,  25 kHz, 100

q

C)

B65813J0000R041

B65813

Core

RM 10

epcos-ferrites-and-accessories-html.html
background image

252

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180

q

C), color code black

Sumikon PM 9630

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 171

Squared pins.
For matching clamp and insulating washers see page 254.

12 pins         

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Pins

Ordering code

1

41.5

52

43

8

B65814N1008D001

12

B65814N1012D001

2

39

52

46

8

B65814N1008D002

12

B65814N1012D002

Hole arrangement

View in

mounting direction

     

Version

Pins omitted

8 pins

2, 5, 8, 11

B65814

Accessories

RM 10

epcos-ferrites-and-accessories-html.html
background image

253

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former for power applications

Optimized for automatic winding
Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155

q

C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 171

For matching clamp and insulating washer 1 see page 254.       

    

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Pins

Ordering code

1

41.5

52

43

12

B65814C1512T001

Hole arrangement

View in mounting direction

(Note half pitch!)

B65814

Accessories

RM 10

epcos-ferrites-and-accessories-html.html
background image

254

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Clamp

With ground terminal, made of stainless spring steel (tinned), 0.4 mm thick

Solderability to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Also available as strip clamp on reels on request

Insulating washer 1

 between core and coil former

For tolerance compensation and for insulation

Made of polycarbonate (UL 94 V-0, insulation class to IEC 60085: E   120

q

C), 0.08 mm thick

Aryphan F685, 

>

E167358 (M)

@

, natural color, LOFO HIGH TECH FILM GMBH

Insulating washer 2

 for double-clad PCBs

Made of polycarbonate (UL 94 V-0, insulation class to IEC 60085: E   120

q

C), 0.25 mm thick

Makrofol FR7-2, 

>

E118859 (M)

@

, natural color, BAYER MATERIALSCIENCE AG

Clamp

Insulating washer 1

Insulating washer 2

Ordering code

Clamp (ordering code per piece, 2 are required)

B65814B2203X000

Insulating washer 1 (reel packing, PU = 1 reel)

B65814B5000X000

Insulating washer 2 (bulk)

B65814B2005X000

(preliminary data)

B65814

Accessories

RM 10

epcos-ferrites-and-accessories-html.html
background image

255

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Adjusting screw

Tube core with thread and core brake made of GFR polyterephthalate

Pocan B3235

®

>

E245249 (M)

@

, LANXESS AG

Tube core

Ordering code

‡ u

 length (mm)

Material

Color code

4.55 

u

 6.3

N22

red

B65679E0003X022

4.98 

u

 6.3

N22

black

B65679E0002X022

B65679

Accessories

RM 10

epcos-ferrites-and-accessories-html.html
background image

256

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-4

For compact transformers

Without center hole

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.34 mm

–1

l

e

= 33.9 mm

A

e

= 99.1 mm

2

A

min

= 90.0 mm

2

V

e

= 3360 mm

3

Approx. weight

 17.2 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N49

3700 +30/–20%

1000

< 0.62 ( 50 mT, 500 kHz, 100

q

C)

B65813P0000R049

N92

4000 +30/–20%

1090

< 1.90 (200 mT, 100 kHz, 100

q

C)

B65813P0000R092

N87

5200 +30/–20%

1410

< 1.72 (200 mT, 100 kHz, 100

q

C)

B65813P0000R087

B65813P

Core

RM 10 »Low Profile«

epcos-ferrites-and-accessories-html.html
background image

257

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

    

Example of an assembly set

Individual parts

Part no.

Page

Core

B65815

258

Clamps

B65816

261

Coil former

B65816

259

Core

B65815

258

Also available:

Coil former for

power applications

B65816

260

RM 12 low-profile:

Core

B65815P

262

Core and accessories

RM 12

epcos-ferrites-and-accessories-html.html
background image

258

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-4

Optimized core cross section and increased         

thickness of base for power applications

Without center hole

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.39 mm

–1

l

e

= 57 mm

A

e

= 146 mm

2

A

min

= 125 mm

2

V

e

= 8320 mm

3

Approx. weight

 45 g/set

Gapped

Ungapped

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

-E without center hole

N41

160 

r

3%

1.30

50

B65815E0160A041

250 

r

3%

0.70

78

B65815E0250A041

400 

r

5%

0.35

124

B65815E0400J041

1000 

r

5%

0.12

311

B65815E1000J041

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

-E without center hole

N30

8700 +30/–20%

2700

B65815E0000R030

N49

3700 +30/–20%

1150

< 1.41 ( 50 mT, 500 kHz, 100

q

C) B65815E0000R049

N87

5300 +30/–20%

1640

< 4.50 (200 mT, 100 kHz, 100

q

C) B65815E0000R087

N97

5300 +30/–20%

1640

< 3.60 (200 mT, 100 kHz, 100

q

C) B65815E0000R097

N41

6000 +30/–20%

1860

< 1.50 (200 mT,  25 kHz, 100

q

C) B65815E0000R041

B65815

Core

RM 12

epcos-ferrites-and-accessories-html.html
background image

259

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180

q

C), color code black

Sumikon PM 9630

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 171

Squared pins.
For matching clamp see page 261.         

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Pins

Ordering code

1

73

61

28.7

12

B65816N1012D001

11

B65816N1011D001

Hole arrangement

View in mounting direction

Ground Ø 1.3

+0.1

pin 9 omitted in the 11-pin version

12 pins

B65816

Accessories

RM 12

epcos-ferrites-and-accessories-html.html
background image

260

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former for power applications

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155

q

C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 171

For matching clamp see page 261.         

    

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Pins

Ordering code

1

72

61

28.7

12

B65816C1512T001

Hole arrangement

View in mounting direction

(Note half pitch!)

Marking of pin 1

Ground Ø 1.3+0.1

B65816

Accessories

RM 12

epcos-ferrites-and-accessories-html.html
background image

261

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Clamp

With ground terminal, made of spring steel (tinned), 0.45 mm thick

Solderability to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Ordering code

Clamp (ordering code per piece, 2 are required)

B65816A2002X000

B65816

Accessories

RM 12

epcos-ferrites-and-accessories-html.html
background image

262

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-4

For compact transformers

Without center hole

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.29 mm

–1

l

e

= 42 mm

A

e

= 147.5 mm

2

A

min

= 124.7 mm

2

V

e

= 6195 mm

3

Approx. weight

 33.6 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N49

4500 +30/–20%

1020

< 1.21 ( 50 mT, 500 kHz, 100

q

C)

B65815P0000R049

N92

4800 +30/–20%

1090

< 3.70 (200 mT, 100 kHz, 100

q

C)

B65815P0000R092

N87

6300 +30/–20%

1430

< 3.36 (200 mT, 100 kHz, 100

q

C)

B65815P0000R087

B65815P

Core

RM 12 »Low Profile«

epcos-ferrites-and-accessories-html.html
background image

263

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

    

Example of an assembly set         

Individual parts

Part no.

Page

Core

B65887

264

Clamps

B65888

267

Coil former

B65888

265

Core

B65887

264

Insulating washer

B65888

267

Also available:

Coil former for

power applications

B65888

266

RM 14 low-profile:

Core

B65887P

268

Core and accessories

RM 14

epcos-ferrites-and-accessories-html.html
background image

264

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-4         

Optimized core cross section and increased

thickness of base for power applications

Without center hole

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.35 mm

–1

l

e

= 70 mm

A

e

= 200 mm

2

A

min

= 170 mm

2

V

e

= 14000 mm

3

Approx. weight

 74 g/set

Gapped

Ungapped

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

-E without center hole

N41

160 

r

3%

1.90

45

B65887E0160A041

250 

r

3%

1.00

70

B65887E0250A041

400 

r

3%

0.50

111

B65887E0400A041

1000 

r

5%

0.15

279

B65887E1000J041

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

-E without center 
hole

N49

3900 +30/–20%

1090

< 2.37 ( 50 mT, 500 kHz, 100

q

C)

B65887E0000R049

N87

6000 +30/–20%

1670

< 7.40 (200 mT, 100 kHz, 100

q

C)

B65887E0000R087

N97

6000 +30/–20%

1670

< 5.60 (200 mT, 100 kHz, 100

q

C)

B65887E0000R097

N41

6800 +30/–20%

1890

< 2.52 (200 mT,  25 kHz, 100

q

C)

B65887E0000R041

B65887

Core

RM 14

epcos-ferrites-and-accessories-html.html
background image

265

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180

q

C), color code black

Sumikon PM 9630

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 171

Squared pins.
For matching clamp and insulating washer see page 267.

10 pins

12 pins         

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Pins

Ordering code

1

107

71.5

23

10

B65888N1010D001

12

B65888N1012D001

Hole arrangement

View in mounting direction

B65888

Accessories

RM 14

epcos-ferrites-and-accessories-html.html
background image

266

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former for power applications

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155

q

C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 171

For matching clamp and insulating washer see page 267.

    

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Pins

Ordering code

1

106

71.5

23

12

B65888C1512T001

Hole arrangement

View in mounting direction

(Note half pitch!)

Marking of pin 1

Ground Ø 1.6+0.1

B65888

Accessories

RM 14

epcos-ferrites-and-accessories-html.html
background image

267

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Clamp

With ground terminal, made of stainless spring steel (tinned), 0.5 mm thick

Solderability to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Insulating washer 

for double-clad PCBs

Made of polycarbonate (UL 94 V-0, insulation class to IEC 60085: E   120

q

C), 0.25 mm thick

Makrofol FR7-2, 

>

E118859 (M)

@

, natural color, BAYER MATERIALSCIENCE AG        

Clamp

Ordering code

Clamp (ordering code per piece, 2 are required)

B65888A2002X000

Insulating washer (bulk)

B65888B2005X000

Insulating washer 

B65888

Accessories

RM 14

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background image

268

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-4

For compact transformers

Without center hole

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.25 mm

–1

l

e

= 50.9 mm

A

e

= 201 mm

2

A

min

= 170 mm

2

V

e

= 10230 mm

3

Approx. weight

 55 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N49

5100 +30/–20%

1030

< 2.0 ( 50 mT, 500 kHz, 100

q

C)

B65887P0000R049

N92

5400 +30/–20%

1090

< 6.1 (200 mT, 100 kHz, 100

q

C)

B65887P0000R092

N87

7100 +30/–20%

1430

< 5.5 (200 mT, 100 kHz, 100

q

C)

B65887P0000R087

B65887P

Core

RM 14 »Low Profile«

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269

04/13

PQ cores

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

PQ cores for switch-mode power supplies

These cores are a preferred shape for power conversion. The main advantages compared to 
conventional round or rectangular E type cores are the optimized round leg and wider outer surface. 
The round leg reduces winding length and hence copper cost in production and the wider surface 
area lowers the thermal resistance by offering a larger area for heat dissipation. The shape also 
provides better shielding to the winding.

EPCOS offers the extended PQ series from PQ16 up to PQ40 and PQ50 in the typical power 
materials (N87, N97, N95, N49 and N92). PQ cores are supplied in sets. Selected bobbins are also 
available.

General information

PQ cores

epcos-ferrites-and-accessories-html.html
background image

270

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-13

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.641 mm

–1

l

e

= 27.00 mm

A

e

= 42.10 mm

2

A

min

= 38.50 mm

2

V

e

= 1136 mm

3

Approx. weight

 6.0 g/set

Dimensions in mm

Ungapped

1) Measurement parameter: 10 kHz, 0.25 mT, 100 turns, room temperature.

A

L

 value is measured acc. to IEC62044-2. An appropriate wringing of cores with polished surface is used to 

improve reproducibility of the measurement. (It is recommended to rub the mating surfaces themselves six times 
in a circular or elliptic arc that matches the core profile before measuring A

L

 value).

Material A

L

 value

1)

nH

P

e

P

V

W/set

Ordering code

N87

2350 +30/–20% 1200 < 0,70 (200 mT, 100 kHz, 100

q

C)

B65885A0000R087

N97

2450 +30/–20% 1250 < 0.60 (200 mT, 100 kHz, 100

q

C)

B65885A0000R097

N95

2750 +30/–20% 1400 < 0.65 (200 mT, 100 kHz, 25

q

C – 100

q

C)

< 0.80 (200 mT, 100 kHz, 120

q

C)

B65885A0000R095

N92

1900 +30/–20%

970 < 0.70 (200 mT, 100 kHz, 100

q

C)

B65885A0000R095

N49

1900 +30/–20%

970 < 0.40 ( 50 mT, 500 kHz, 100

q

C)

B65885A0000R049

B65885A

PQ 16/11.6 through PQ 50/50

Core

PQ 16/11.6

epcos-ferrites-and-accessories-html.html
background image

271

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-13

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.579 mm

–1

l

e

= 37.0 mm

A

e

= 64.0 mm

2

A

min

= 57.6 mm

2

V

e

= 2367 mm

3

Approx. weight

 13 g/set

Dimensions in mm

Ungapped

1) Measurement parameter: 10 kHz, 0.25 mT, 100 turns, room temperature.

A

L

 value is measured acc. to IEC62044-2. An appropriate wringing of cores with polished surface is used to 

improve reproducibility of the measurement. (It is recommended to rub the mating surfaces themselves six times 
in a circular or elliptic arc that matches the core profile before measuring A

L

 value).

Material A

L

 value

1)

nH

P

e

P

V

W/set

Ordering code

N87

3100 +30/–20% 1430 < 1.40 (200 mT, 100 kHz, 100

q

C)

B65875B0000R087

N97

3200 +30/–20% 1475 < 1.25 (200 mT, 100 kHz, 100

q

C)

B65875B0000R097

N95

3750 +30/–20% 1730 < 1.35 (200 mT, 100 kHz, 25

q

C – 100

q

C)

< 1.62 (200 mT, 100 kHz, 120

q

C)

B65875B0000R095

N92

2400 +30/–20% 1105 < 1.45 (200 mT, 100 kHz, 100

q

C)

B65875B0000R092

N49

2400 +30/–20% 1105 < 0.75 ( 50 mT, 500 kHz, 100

q

C)

B65875B0000R049

B65875B

Core

PQ 20/16

epcos-ferrites-and-accessories-html.html
background image

272

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-13

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.718 mm

–1

l

e

= 45.20 mm

A

e

= 62.90 mm

2

A

min

= 54.40 mm

2

V

e

= 2843 mm

3

Approx. weight

 15.6 g/set

Dimensions in mm

Ungapped

1) Measurement parameter: 10 kHz, 0.25 mT, 100 turns, room temperature.

A

L

 value is measured acc. to IEC62044-2. An appropriate wringing of cores with polished surface is used to 

improve reproducibility of the measurement. (It is recommended to rub the mating surfaces themselves six times 
in a circular or elliptic arc that matches the core profile before measuring A

L

 value).

Material A

L

 value

1)

nH

P

e

P

V

W/set

Ordering code

N87

2650 +30/–20% 1515 < 1.65 (200 mT, 100 kHz, 100

q

C)

B65875A0000R087

N97

2750 +30/–20% 1565 < 1.50 (200 mT, 100 kHz, 100

q

C)

B65875A0000R097

N95

3300 +30/–20% 1860 < 1.60 (200 mT, 100 kHz, 25

q

C – 100

q

C)

< 1.92 (200 mT, 100 kHz, 120

q

C)

B65875A0000R095

N49

2000 +30/–20% 1150 < 0.90 ( 50 mT, 500 kHz, 100

q

C)

B65875A0000R049

B65875A

Core

PQ 20/20

epcos-ferrites-and-accessories-html.html
background image

273

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-13

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.363 mm

–1

l

e

= 44.4 mm

A

e

= 122.3 mm

2

A

min

= 108.8 mm

2

V

e

= 5435 mm

3

Approx. weight

 31 g/set

Dimensions in mm

Ungapped

1) Measurement parameter: 10 kHz, 0.25 mT, 100 turns, room temperature.

A

L

 value is measured acc. to IEC62044-2. An appropriate wringing of cores with polished surface is used to 

improve reproducibility of the measurement. (It is recommended to rub the mating surfaces themselves six times 
in a circular or elliptic arc that matches the core profile before measuring A

L

 value).

Material A

L

 value

1)

nH

P

e

P

V

W/set

Ordering code

N87

5000 +30/–20% 1440 < 3.20 (200 mT, 100 kHz, 100

q

C)

B65877B0000R087

N97

5150 +30/–20% 1480 < 2.70 (200 mT, 100 kHz, 100

q

C)

B65877B0000R097

N95

6300 +30/–20% 1820 < 3.00 (200 mT, 100 kHz, 25

q

C – 100

q

C)

< 3.60 (200 mT, 100 kHz, 120

q

C)

B65877B0000R095

N92

3850 +30/–20% 1110 < 3.70 (200 mT, 100 kHz, 100

q

C)

B65877B0000R092

N49

3850 +30/–20% 1110 < 1.90 ( 50 mT, 500 kHz, 100

q

C)

B65877B0000R049

B65877B

Core

PQ 26/20

epcos-ferrites-and-accessories-html.html
background image

274

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180

q

C), color code black

Sumikon PM 9820

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

    

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Terminals

Ordering code

1

33

56

58

12

B65878E0012D001

B65878E

Accessories

PQ 26/20

epcos-ferrites-and-accessories-html.html
background image

275

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-13

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.440 mm

–1

l

e

= 53.60 mm

A

e

= 122.0 mm

2

A

min

= 108.7 mm

2

V

e

= 6530 mm

3

Approx. weight

 36 g/set

Dimensions in mm

Ungapped

1) Measurement parameter: 10 kHz, 0.25 mT, 100 turns, room temperature.

A

L

 value is measured acc. to IEC62044-2. An appropriate wringing of cores with polished surface is used to 

improve reproducibility of the measurement. (It is recommended to rub the mating surfaces themselves six times 
in a circular or elliptic arc that matches the core profile before measuring A

L

 value).

Material A

L

 value

1)

nH

P

e

P

V

W/set

Ordering code

N87

4500 +30/–20% 1550 < 3.75 (200 mT, 100 kHz, 100

q

C)

B65877A0000R087

N97

4650 +30/–20% 1620 < 3.30 (200 mT, 100 kHz, 100

q

C)

B65877A0000R097

N95

5700 +30/–20% 1980 < 3.60 (200 mT, 100 kHz, 25

q

C – 100

q

C)

< 4.32 (200 mT, 100 kHz, 120

q

C)

B65877A0000R095

N49

3300 +30/–20% 1235 < 2.30 ( 50 mT, 500 kHz, 100

q

C)

B65877A0000R049

B65877A

Core

PQ 26/25

epcos-ferrites-and-accessories-html.html
background image

276

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180

q

C), color code black

Sumikon PM 9820

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

    

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Terminals

Ordering code

1

47

56

41

12

B65878E1012D001

B65878E

Accessories

PQ 26/25

epcos-ferrites-and-accessories-html.html
background image

277

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-13

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.314 mm

–1

l

e

= 46.40 mm

A

e

= 154.2 mm

2

A

min

= 127.5 mm

2

V

e

= 7460 mm

3

Approx. weight

 41 g/set

Dimensions in mm

Ungapped

1) Measurement parameter: 10 kHz, 0.25 mT, 100 turns, room temperature.

A

L

 value is measured acc. to IEC62044-2. An appropriate wringing of cores with polished surface is used to 

improve reproducibility of the measurement. (It is recommended to rub the mating surfaces themselves six times 
in a circular or elliptic arc that matches the core profile before measuring A

L

 value).

Material A

L

 value

1)

nH

P

e

P

V

W/set

Ordering code

N87

6300 +30/–20% 1580 < 5.50 (200 mT, 100 kHz, 100

q

C)

B65879A0000R087

N97

6500 +30/–20% 1625 < 4.60 (200 mT, 100 kHz, 100

q

C)

B65879A0000R097

N95

7600 +30/–20% 1895 < 4.70 (200 mT, 100 kHz, 25

q

C – 100

q

C)

< 5.54 (200 mT, 100 kHz, 120

q

C)

B65879A0000R095

N49

4600 +30/–20% 1150 < 2.65 ( 50 mT, 500 kHz, 100

q

C)

B65879A0000R049

B65879A

Core

PQ 32/20

epcos-ferrites-and-accessories-html.html
background image

278

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180

q

C), color code black

Sumikon PM 9820

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

    

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Terminals

Ordering code

1

47

66

48

12

B65880E0012D001

B65880E

Accessories

PQ 32/20

epcos-ferrites-and-accessories-html.html
background image

279

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-13

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.441 mm

–1

l

e

= 67.80 mm

A

e

= 153.8 mm

2

A

min

= 127.5 mm

2

V

e

= 10440 mm

3

Approx. weight

 57.4 g/set

Dimensions in mm

Ungapped

1) Measurement parameter: 10 kHz, 0.25 mT, 100 turns, room temperature.

A

L

 value is measured acc. to IEC62044-2. An appropriate wringing of cores with polished surface is used to 

improve reproducibility of the measurement. (It is recommended to rub the mating surfaces themselves six times 
in a circular or elliptic arc that matches the core profile before measuring A

L

 value).

Material A

L

 value

1)

nH

P

e

P

V

W/set

Ordering code

N87

4800 +30/–20% 1700 < 7.00 (200 mT, 100 kHz, 100

q

C)

B65879B0000R087

N97

5000 +30/–20% 1760 < 5.80 (200 mT, 100 kHz, 100

q

C)

B65879B0000R097

N95

6100 +30/–20% 2140 < 6.30 (200 mT, 100 kHz, 25

q

C – 100

q

C)

< 7.56 (200 mT, 100 kHz, 120

q

C)

B65879B0000R095

N49

3450 +30/–20% 1210 < 3.65 ( 50 mT, 500 kHz, 100

q

C)

B65879B0000R049

B65879B

Core

PQ 32/30

epcos-ferrites-and-accessories-html.html
background image

280

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180

q

C), color code black

Sumikon PM 9820

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

    

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Terminals

Ordering code

1

104

62

21

12

B65880E2012D001

B65880E

Accessories

PQ 32/30

epcos-ferrites-and-accessories-html.html
background image

281

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-13

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.467 mm

–1

l

e

= 79.20 mm

A

e

= 169.7 mm

2

A

min

= 146.5 mm

2

V

e

= 13440 mm

3

Approx. weight

 74 g/set

Dimensions in mm

Ungapped

1) Measurement parameter: 10 kHz, 0.25 mT, 100 turns, room temperature.

A

L

 value is measured acc. to IEC62044-2. An appropriate wringing of cores with polished surface is used to 

improve reproducibility of the measurement. (It is recommended to rub the mating surfaces themselves six times 
in a circular or elliptic arc that matches the core profile before measuring A

L

 value).

Mate-

rial

A

L

 value

1)

nH

P

e

P

V

W/set

Ordering code

N87

4500 +30/–20% 1670 < 8.75 (200 mT, 100 kHz, 100

q

C)

B65881A0000R087

N97

4700 +30/–20% 1750 < 7.10 (200 mT, 100 kHz, 100

q

C)

B65881A0000R097

N95

5700 +30/–20% 2120 < 7.92 (200 mT, 100 kHz, 25

q

C – 100

q

C)

< 9.50  (200 mT, 100 kHz, 120

q

C)

B65881A0000R095

N92

3300 +30/–20% 1225 < 10.50 (200 mT, 100 kHz, 100

q

C)

B65881A0000R092

N49

3300 +30/–20% 1225 < 3.75 ( 50 mT, 500 kHz, 100

q

C)

B65881A0000R049

B65881A

Core

PQ 35/35

epcos-ferrites-and-accessories-html.html
background image

282

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-13

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.390 mm

–1

l

e

= 74.10 mm

A

e

= 190.6 mm

2

A

min

= 159.9 mm

2

V

e

= 14120 mm

3

Approx. weight

 74 g/set

Dimensions in mm

Ungapped

1) Measurement parameter: 10 kHz, 0.25 mT, 100 turns, room temperature.

A

L

 value is measured acc. to IEC62044-2. An appropriate wringing of cores with polished surface is used to 

improve reproducibility of the measurement. (It is recommended to rub the mating surfaces themselves six times 
in a circular or elliptic arc that matches the core profile before measuring A

L

 value).

Material A

L

 value

1)

nH

P

e

P

V

W/set

Ordering code

N87

5200 +30/–20% 1615 < 1.50 (100 mT, 100 kHz, 100

q

C)

B65883B0000R087

N97

5300 +30/–20% 1650 < 1.40 (100 mT, 100 kHz, 100

q

C)

B65883B0000R097

N95

6500 +30/–20% 2020 < 1.56 (100 mT, 100 kHz, 25

q

C)

< 1.45 (100 mT, 100 kHz, 50

q

C – 100

q

C)

< 1.70 (100 mT, 100 kHz, 120

q

C)

B65883B0000R095

N92

3900 +30/–20% 1210 < 2.50 (100 mT, 100 kHz, 100

q

C)

B65883B0000R092

N49

3900 +30/–20% 1210 < 3.80 ( 50 mT, 500 kHz, 100

q

C)

B65883B0000R049

B65883B

Preliminary data

Core

PQ 40/30

epcos-ferrites-and-accessories-html.html
background image

283

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-13

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.490 mm

–1

l

e

= 92.50 mm

A

e

= 188.3 mm

2

A

min

= 159.9 mm

2

V

e

= 17430 mm

3

Approx. weight

 90 g/set

Dimensions in mm

Ungapped

1) Measurement parameter: 10 kHz, 0.25 mT, 100 turns, room temperature.

A

L

 value is measured acc. to IEC62044-2. An appropriate wringing of cores with polished surface is used to 

improve reproducibility of the measurement. (It is recommended to rub the mating surfaces themselves six times 
in a circular or elliptic arc that matches the core profile before measuring A

L

 value).

Material A

L

 value

1)

nH

P

e

P

V

W/set

Ordering code

N87

4300 +30/–20% 1680 < 1.80 (100 mT, 100 kHz, 100

q

C)

B65883A0000R087

N97

4500 +30/–20% 1755 < 1.65 (100 mT, 100 kHz, 100

q

C)

B65883A0000R097

N95

5500 +30/–20% 2145 < 1.95 (100 mT, 100 kHz, 25

q

C)

< 1.75 (100 mT, 100 kHz, 50

q

C – 100

q

C)

< 2.10 (200 mT, 100 kHz, 120

q

C)

B65883A0000R095

N92

3200 +30/–20% 1250 < 3.10 (100 mT, 100 kHz, 100

q

C)

B65883A0000R092

N49

3200 +30/–20% 2145 < 4.80 ( 50 mT, 500 kHz, 100

q

C)

B65883A0000R049

B65883A

Preliminary data

Core

PQ 40/40

epcos-ferrites-and-accessories-html.html
background image

284

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

PMC thermosetting plastics (UL 94 V-0), color code black,

Phenolic T375 J 

>

E59481 (M)

@

, CHANG CHUN PLASTICS CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

    

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Terminals

Ordering code

1

309

87

10

12

B65884E0012D001

B65884E

Accessories

PQ 40/40

epcos-ferrites-and-accessories-html.html
background image

285

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-13

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.283 mm

–1

l

e

= 93.5 mm

A

e

= 330.0 mm

2

A

min

= 290.0 mm

2

V

e

= 30855 mm

3

Approx. weight

 170 g/set

Dimensions in mm

Ungapped

1) Measurement parameter: 10 kHz, 0.25 mT, 100 turns, room temperature.

A

L

 value is measured acc. to IEC62044-2. An appropriate wringing of cores with polished surface is used to 

improve reproducibility of the measurement. (It is recommended to rub the mating surfaces themselves six times 
in a circular or elliptic arc that matches the core profile before measuring A

L

 value).

Material A

L

 value

1)

nH

P

e

P

V

W/set

Ordering code

N87

7600 +30/–20% 1710 < 3.20 (100 mT, 100 kHz, 100

q

C)

B65981B0000R087

N97

7800 +30/–20% 1760 < 2.90 (100 mT, 100 kHz, 100

q

C)

B65981B0000R097

N95

9400 +30/–20% 2120 < 3.70 (100 mT, 100 kHz, 25

q

C – 100

q

C)

< 4.50 (100 mT, 100 kHz, 120

q

C)

B65981B0000R095

N92

5500 +30/–20% 1240 < 5.40 (100 mT, 100 kHz, 100

q

C)

B65981B0000R095

B65981B

Preliminary data

Core

PQ 50/40

epcos-ferrites-and-accessories-html.html
background image

286

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-13

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.342 mm

–1

l

e

= 113.0 mm

A

e

= 330.0 mm

2

A

min

= 290.0 mm

2

V

e

= 37270 mm

3

Approx. weight

 190 g/set

Dimensions in mm

Ungapped

1) Measurement parameter: 10 kHz, 0.25 mT, 100 turns, room temperature.

A

L

 value is measured acc. to IEC62044-2. An appropriate wringing of cores with polished surface is used to 

improve reproducibility of the measurement. (It is recommended to rub the mating surfaces themselves six times 
in a circular or elliptic arc that matches the core profile before measuring A

L

 value).

Material A

L

 value

1)

nH

P

e

P

V

W/set

Ordering code

N87

6500 +30/–20% 1770 < 3.80 (100 mT, 100 kHz, 100

q

C)

B65981A0000R087

N97

6700 +30/–20% 1825 < 3.50 (100 mT, 100 kHz, 100

q

C)

B65981A0000R097

N95

8200 +30/–20% 2230 < 4.50 (100 mT, 100 kHz, 50

q

C – 100

q

C)

< 5.40 (100 mT, 100 kHz, 120

q

C)

B65981A0000R095

N92

4700 +30/–20% 1170 < 6.50 (100 mT, 100 kHz, 100

q

C)

B65981A0000R092

N51

8200 +30/–20% 2230 < 6.10 (100 mT, 100 kHz, 25

q

C)

< 6.50 (100 mT, 100 kHz, 100

q

C)

B65981A0000R051

B65981A

Preliminary data

Core

PQ 50/50

epcos-ferrites-and-accessories-html.html
background image

287

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

PMC thermosetting plastics (UL 94 V-0), color code black,

Phenolic T375 J 

>

E59481 (M)

@

, CHANG CHUN PLASTICS CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

    

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Terminals

Ordering code

1

340

100.5

10.2

12

B65982E0012D001

B65982E

Accessories

PQ 50/50

epcos-ferrites-and-accessories-html.html
background image

288

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

PM cores are particularly suitable for use in transformers handling high powers in the frequency 
range up to 300 kHz. For numerous design tasks in telecommunications and industrial electronics 
(e.g. power pulse transformers in radar transmitters, antenna matching networks, machine control 
systems, thyristor firing transformers, energy storage chokes in switch-mode power supply equip-
ment and others), the pot core shape offers various advantages: wide flux area for high power at a 
minimum number of turns, thus causing only low magnetic leakage and stray capacitance, as well 
as good shielding owing to the closed form, precisely ground air gaps, straightforward assembly and 
economic mounting.

A family of large pot cores, briefly designated PM cores (for 

P

ot core

M

odule), is presented in the 

following.

Due to the weight of these pot cores, particularly in the case of the large cores 87/70 and 114/93, 
mounting on PC boards may not always be possible. In these cases, the coil former should be 
mounted with its terminals upwards.

Brass clamping yoke

Core

Coil former

Core

Aluminum base plate

Washers

Nuts

Example of an assembly set:

General information

PM cores

PM cores

epcos-ferrites-and-accessories-html.html
background image

289

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1

Core losses

For each core type, the maximum dissipation loss is specified in W/set with the relevant measure-
ment parameters. The flux density has been calculated on the basis of a sinusoidal voltage and is 
referred to the minimum cross-sectional area A

min

.

2

Tightening torque

When using the mounting assembly, the torques for tightening the nuts (without printed circuit 
board) are as follows:

Type

Torque

PM 50/39

0.4 

Nm

PM 62/49

0.6 

Nm

PM 74/59

0.8 

Nm

PM 87/70

1.0 

Nm

PM 114/93

1.2 Nm

General information

PM cores

epcos-ferrites-and-accessories-html.html
background image

290

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61247

Particularly suitable for power transformers

and energy storage chokes

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.227 mm

–1

l

e

= 84 mm

A

e

= 370 mm

2

A

min

= 280 mm

2

V

e

= 31000 mm

3

Approx. weight

 140 g/set

Gapped

Ungapped

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

N27

250 

r

3%

2.00

45

B65646A0250A027

630 

r

3%

0.63

114

B65646A0630A027

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

7400 +30/–20%

1340

< 4.2 (200 mT,  25 kHz, 100

q

C) B65646A0000R027

N87

7400 +30/–20%

1340

< 15.5 (200 mT, 100 kHz, 100

q

C) B65646A0000R087

B65646

PM 50/39 through PM 114/39

Core

PM 50/39

epcos-ferrites-and-accessories-html.html
background image

291

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155

q

C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 173

    

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Solder

pins

Ordering code

1

154

96.8

21.6

14

B65647B1014T001

B65647

Accessories

PM 50/39

epcos-ferrites-and-accessories-html.html
background image

292

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Mounting assembly

For chassis mounting

1)

 or printed circuit boards

The set comprises a yoke and a base plate

Fixing nuts M3 and washers are supplied

Yoke

Material: Brass clamping yoke (

‡

 3 mm) with thread

Base plate

Material: Aluminum (0.6 mm)     

Ordering code

Complete mounting assembly including nuts and washers

B65647A2000X000

1) On a chassis the coil former must be mounted with its solder pins upward.

B65647

Accessories

PM 50/39

epcos-ferrites-and-accessories-html.html
background image

293

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61247

Particularly suitable for power transformers

and energy storage chokes

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.191 mm

–1

l

e

= 109 mm

A

e

= 570 mm

2

A

min

= 470 mm

2

V

e

= 62000 mm

3

Approx. weight

 280 g/set

Gapped

Ungapped

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

N27

315 

r

3%

2.60

48

B65684A0315A027

630 

r

3%

1.10

95

B65684A0630A027

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

9200 +30/–20%

1400

< 9.5 (200 mT,  25 kHz, 100

q

C)

B65684A0000R027

N87

9200 +30/–20%

1400

< 5.8 (100 mT, 100 kHz, 100

q

C)

B65684A0000R087

B65684

Core

PM 62/49

epcos-ferrites-and-accessories-html.html
background image

294

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155

q

C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 173

Pins squared in the start-of-winding area.

Also available without solder pins.

    

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Solder

pins

Ordering code

1

270

120

15.4

16

B65685B1016T001

1

270

120

15.4

B65685A1000T001

B65685

Accessories

PM 62/49

epcos-ferrites-and-accessories-html.html
background image

295

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Mounting assembly

For chassis mounting

1)

 or printed circuit boards

The set comprises a yoke and a base plate

Fixing nuts M3 and washers are supplied

Yoke

Material: Brass clamping yoke (

‡

 2.6 mm) with thread

Base plate

Material: Aluminum (0.6 mm)

Ordering code

Complete mounting assembly including nuts and washers

B65685A2000X000

FPM0029-8

59.8+0.3

2.3

15

67.8+1

M3

69 0.2

_

60.96±0.1

_

27.5

0.2

ø2.6

3.5+0.15

1

59

_

1) On a chassis the coil former must be mounted with its solder pins upward.

B65685

Accessories

PM 62/49

epcos-ferrites-and-accessories-html.html
background image

296

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61247

Particularly suitable for power transformers

and energy storage chokes

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.162 mm

–1

l

e

= 128 mm

A

e

= 790 mm

2

A

min

= 630 mm

2

V

e

= 101000 mm

3

Approx. weight

 460 g/set

Gapped

Ungapped

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

N27

315 

r

3%

3.80

41

B65686A0315A027

630 

r

3%

1.50

81

B65686A0630A027

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

10000 +30/–20% 1290

< 7.5 (150 mT,  25 kHz, 100

q

C)

B65686A0000R027

N87

10000 +30/–20% 1290

< 9.6 (100 mT, 100 kHz, 100

q

C)

B65686A0000R087

B65686

Core

PM 74/59

epcos-ferrites-and-accessories-html.html
background image

297

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155

q

C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 173

Also available without solder pins.

    

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Solder

pins

Ordering code

1

442

140

10.9

18

B65687A1018T001

1

442

140

10.9

B65687A1000T001

B65687

Accessories

PM 74/59

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background image

298

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Mounting assembly

For chassis mounting

1)

 or printed circuit boards

The set comprises a yoke and a base plate

Fixing nuts M3 and washers are supplied

Yoke

Material: Brass clamping yoke (

‡

 3 mm) with thread

Base plate

Material: Aluminum (0.6 mm)

Ordering code

Complete mounting assembly including nuts and washers

B65687A2000X000

FPM0030-B

69+0.5

ø3

69

2

15

+1.0

80

0.5

_

M3

3.5+0.15

31

0.2

_

83.4 0.3

_

76.2±0.1

1) On a chassis the coil former must be mounted with its solder pins upward.

B65687

Accessories

PM 74/59

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background image

299

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61247

For power transformers

>1 kW (20 kHz) and energy storage chokes

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.16 mm

–1

l

e

= 146 mm

A

e

= 910 mm

2

A

min

= 700 mm

2

V

e

= 133000 mm

3

Approx. weight

 770 g/set

Gapped

Ungapped

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

N27

400 

r

3%

3.50

51

B65713A0400A027

5000 

r

15%

0.14

638

B65713A5000L027

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

12000 +30/–20%

1530

< 12.4 (150 mT,  25 kHz, 100

q

C) B65713A0000R027

N87

12000 +30/–20%

1530

< 8.0 (100 mT, 100 kHz, 100

q

C) B65713A0000R087

B65713

Core

PM 87/70

epcos-ferrites-and-accessories-html.html
background image

300

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155

q

C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Winding:

see 

“Processing notes”

, page 173

Pins squared in the start-of-winding area.

Also available without solder pins.

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Solder

pins

Ordering code

1

657

158

8.27

20

B65714K1020T001

1

657

158

8.27

B65714J1000T001

B65714

Accessories

PM 87/70

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background image

301

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61247

For power transformers

>1 kW (20 kHz) and energy storage chokes

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.116 mm

–1

l

e

= 200 mm

A

e

= 1720 mm

2

A

min

= 1380 mm

2

V

e

= 344000 mm

3

Approx. weight

 1940 g/set

Gapped

Ungapped

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

N27

630 

r

3%

3.80

58

B65733A0630A027

6300 

r

15%

0.22

583

B65733A6300L027

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

16000 +30/–20% 1480

< 14.0 (100 mT,  25 kHz, 100

q

C) B65733A0000R027

N87

16000 +30/–20% 1480

< 10.0 ( 50 mT, 100 kHz, 100

q

C) B65733A0000R087

B65733

Core

PM 114/93

epcos-ferrites-and-accessories-html.html
background image

302

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former without solder pins

Material:

Polyphenylene sulphide (UL 94 V-0, insulation class to IEC 85:

F  max. operating temperature 155

q

C), color code black

Ryton R-4, 

>

E233198 (M)

@

, CHEVRON PHILLIPS CHEMICAL CO L P

Winding:

see 

“Processing notes”

, page 173

    

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Ordering code

1

1070

210

6.75

B65734B1000T001

B65734

Accessories

PM 114/93

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background image

303

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

EP, EPX and EPO cores are typically used for transformer applications. Their cubic shape provides 
an excellent volume ratio to total space used and permits high PCB packing densities. The compact 
design and the broadband materials used (N30, T38, T57, T65 and T66) ensure low magnetic 
leakage, low signal distortion and excellent properties for broadband small-signal transmission 
(xDSL).

EP cores are increasingly being used for power applications. Here we recommend the series EP 7
through EP 20 made of N87 for operation up to about 300 kHz.

Matching pinned and SMD coil formers suitable for automatic processing and shielding accessories 
(yoke, clamp or cap yoke) complete the product line.

Core losses

The maximum dissipation loss for each core type employing power materials is specified in W/set 
together with the measurement parameters. The flux density has been calculated on the basis of a 
sinusoidal voltage and is referred to the minimum cross-sectional area A

min

.

Cap yoke

Core

Coil former

Core

Example of an assembly set EP 13

General information

EP, EPX, EPO cores

EP, EPX, EPO cores

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304

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Tolerances for EP cores

Increasing use is now being made of gapped EP cores with A

L

 values and ultra-low A

L

 tolerances, 

especially for broadband transformers.

The tolerances for EP cores have consequently been defined with consideration of optimized pro-
cess parameters for all materials with an initial permeability  

P

i

 in the region of 1400 to 15000 as a 

step function (see figure below).

The “quantized” A

L

 step values should preferably used. They are still available in their respective 

lower tolerance ranges. Thus a tolerance of 

r

5% can be determined for an EP 13 made of T38 

material for an A

L

 value of 250 nH.

With this type of tolerance definition, EPCOS has defined standard A

L

 values and the associated 

tolerances for the first time.

General information

EP, EPX, EPO cores

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305

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

For small interface transformers and filter chokes

Suitable for high precise feedthrough gapping

Same footprint as EE5

A

L

 value increases about 40% against EE5

Winding area larger than EE5

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 3.149 mm

–1

l

e

= 9.73 mm

A

e

= 3.09 mm

2

A

min

= 2.30 mm

2

V

e

= 30 mm

3

Approx. weight

 0.5 g/set

Gapped

Ungapped

Material

A

L

 value

nH

P

e

s

approx.

mm

Ordering code

T38

16 

r

3%

40

0.24

B65855A0016A038

25 

r

3%

63

0.15

B65855A0025A038

40 

r

5%

100

0.10

B65855A0040J038

63 

r

8%

158

0.06

B65855A0063D038

Material

A

L

 value

nH

P

e

Ordering code

N87

430 +30/–20%

1100

B65855A0000R087

N45

550 +30/–20%

1380

B65855A0000R045

T57

560 +30/–20%

1400

B65855A0000R057

T38

2000 +40/–30%

5000

B65855A0000Y038

T66

2200 +40/–30%

5500

B65855A0000Y066

B65855A

EP 5 through EP 20

Core

EP 5

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306

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

For small interface transformers and filter chokes

Suitable for high precise feedthrough gapping

Same footprint as EE5

Winding area larger than EE5

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 3.359 mm

–1

l

e

= 10.28 mm

A

e

= 3.06 mm

2

A

min

= 2.30 mm

2

V

e

= 31 mm

3

Approx. weight

 0.6 g/set

Gapped

Ungapped

Material

A

L

 value

nH

P

e

s

approx.

mm

Ordering code

T38

16 

r

3%

43

0.24

B65855B0016A038

25 

r

3%

67

0.15

B65855B0025A038

40 

r

5%

107

0.10

B65855B0040J038

63 

r

8%

168

0.06

B65855B0063D038

Material

A

L

 value

nH

P

e

Ordering code

N87

410 +30/–20%

1100

B65855B0000R087

N45

530 +30/–20%

1400

B65855B0000R045

T57

900 +30/–20%

2400

B65855B0000R057

T66

1700 +40/–30%

4500

B65855B0000Y066

T38

1900 +40/–30%

5100

B65855B0000Y038

B65855B

Core

EP 6

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307

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61596

For transformers featuring high inductance

and low overall height

For power applications

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 1.52 mm

–1

l

e

= 15.7 mm

A

e

= 10.3 mm

2

A

min

= 8.5 mm

2

V

e

= 162 mm

3

Approx. weight

 1.4 g/set

Gapped

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

T38

63 

r

3%

0.20

76

B65839A0063A038

100 

r

3%

0.13

121

B65839A0100A038

160 

r

5%

0.08

194

B65839A0160J038

200 

r

6%

0.06

243

B65839A0200C038

250 

r

7%

0.05

303

B65839A0250E038

T57

63 

r

3%

0.20

76

B65839A0063A057

100 

r

3%

0.13

121

B65839A0100A057

160 

r

5%

0.08

194

B65839A0160J057

200 

r

6%

0.06

243

B65839A0200C057

250 

r

7%

0.05

303

B65839A0250E057

N45

63 

r

3%

0.20

76

B65839A0063A045

100 

r

3%

0.13

121

B65839A0100A045

160 

r

5%

0.08

194

B65839A0160J045

200 

r

6%

0.06

243

B65839A0200C045

250 

r

7%

0.05

303

B65839A0250E045

N87

63 

r

3%

0.20

76

B65839A0063A087

100 

r

3%

0.12

121

B65839A0100A087

160 

r

5%

0.07

194

B65839A0160J087

200 

r

6%

0.06

243

B65839A0200C087

250 

r

7%

0.05

303

B65839A0250E087

B65839

Core

EP 7

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308

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

T57

1500 +30/–20%

1820

B65839A0000R057

N45

1500 +30/–20%

1820

B65839A0000R045

N30

2000 +30/–20%

2430

B65839A0000R030

T65

3000 +30/–20%

3640

B65839A0000R065

T38

5200 +40/–30%

6310

B65839A0000Y038

T66

5800 +40/–30%

7040

B65839A0000Y066

N87

1100 +30/–20%

1330

< 0.08 (200 mT, 100 kHz, 100 °C) B65839A0000R087

B65839

Core

EP 7

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309

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Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

F

 max. operating temperature 155 °C), color code green

B65840B1006D001: Sumikon PM 9630

®

>

E41429 (M)

@

, color code black,

SUMITOMO BAKELITE CO LTD

B65840B1006D002: Vyncolit/X611

®

>

E167521 (M)

@

, VYNCOLIT NV

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 174

Squared pins.

Cap yoke

With ground terminal, made of stainless spring steel (tinned), 0.25 mm thick

Coil former

Cap yoke

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Terminals

1

4.7

17.7

128.7

6

B65840B1006D001

2

4.2

17.7

143.8

6

B65840B1006D002

Cap yoke

B65840D2000X000

B65840

Accessories

EP 7

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310

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

SMD coil former with gullwing terminals

Material:

GFR liquid crystal polymer (UL 94 V-0), color code black

Sumika Super E4008

®

>

E54705 (M)

@

, SUMITOMO CHEMICAL CO LTD

Solderability: to IEC 60068-2-58, test Td, method 6 (Group 3): 245 °C, 3 s
Resistance to soldering heat: to IEC 60068-2-58, test Td, method 6 (Group 3): 255 °C, 10 s

permissible soldering temperature for wire-wrap connection on coil former: 400 °C, 1 s

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Terminals

Ordering code

1

4.5

18.1

138.1

6

B65840N1106T001

FEK0475-T-E

3.5±0.1

12.7±0.15

5.08

2.54

1.3

2.54

13.5

2

ø4.5±

0.2

8.6±0.2

7±0.2

9.2±0.2

4.8±0.2

3.6±0.1

5.35±

0.2

0.3

0.6

Recommended
PCB layout

B65840

Preliminary data

Accessories

EP 7

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311

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

For xDSL line transformer

Foot print of EP7

Height of EP13

Optimized design for low distortion

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.91 mm

–1

l

e

= 15.7 mm

A

e

= 17.2 mm

2

A

min

= 13.9 mm

2

V

e

= 270 mm

3

Approx. weight

 2.8 g/set

Gapped

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

T38

63 

r

3%

0.35

46

B65857A0063A038

100 

r

3%

0.22

73

B65857A0100A038

160 

r

4%

0.14

116

B65857A0160B038

200 

r

4%

0.11

145

B65857A0200B038

250 

r

5%

0.09

182

B65857A0250J038

315 

r

6%

0.06

229

B65857A0315C038

400 

r

7%

0.05

291

B65857A0400E038

T57

63 

r

3%

0.35

46

B65857A0063A057

100 

r

3%

0.22

73

B65857A0100A057

160 

r

4%

0.14

116

B65857A0160B057

200 

r

4%

0.11

145

B65857A0200B057

250 

r

5%

0.09

182

B65857A0250J057

315 

r

6%

0.06

229

B65857A0315C057

400 

r

7%

0.05

291

B65857A0400E057

T66

63 

r

3%

0.35

46

B65857A0063A066

100 

r

3%

0.22

73

B65857A0100A066

160 

r

4%

0.14

116

B65857A0160B066

200 

r

4%

0.11

145

B65857A0200B066

250 

r

5%

0.09

182

B65857A0250J066

315 

r

6%

0.06

229

B65857A0315C066

400 

r

7%

0.05

291

B65857A0400E066

B65857A

Core

EPX 7/9

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312

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Gapped

Ungapped

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

N45

63 

r

3%

0.35

46

B65857A0063A045

100 

r

3%

0.22

73

B65857A0100A045

160 

r

4%

0.14

116

B65857A0160B045

200 

r

4%

0.11

145

B65857A0200B045

250 

r

5%

0.09

182

B65857A0250J045

315 

r

6%

0.06

229

B65857A0315C045

400 

r

7%

0.05

291

B65857A0400E045

Material

A

L

 value

nH

P

e

Ordering code

N45

2500 +30/–20%

1820

B65857A0000R045

T57

2600 +30/–20%

1890

B65857A0000R057

T38

9000 +40/–30%

6540

B65857A0000Y038

T66

10500 +40/–30%

7630

B65857A0000Y066

B65857A

Core

EPX 7/9

epcos-ferrites-and-accessories-html.html
background image

313

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

SMD coil former with gullwing terminals

Material:

GFR liquid crystal polymer (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155 °C), color code black

Zenite 7130

®

>

E344082 (M)

@

, TICONA

Solderability: to IEC 60068-2-58, test Td, method 6 (Group 3): 245 °C, 3 s
Resistance to soldering heat: to IEC 60068-2-58, test Td, method 6 (Group 3): 255 °C, 10 s

permissible soldering temperature for wire-wrap connection on coil former: 400 °C, 1 s

Winding:

see 

“Processing notes”

, page 179

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Terminals

Ordering code

1

4.1

22.9

191.8

8

B65858A1008T001

B65858

Accessories

EPX 7/9

epcos-ferrites-and-accessories-html.html
background image

314

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

For xDSL line transformers

Height of EP13

Optimized design for low distortion

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 1.09 mm

–1

l

e

= 19.0 mm

A

e

= 17.5 mm

2

A

min

= 13.9 mm

2

V

e

= 333 mm

3

Approx. weight

 3 g/set

Gapped

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

T38

63 

r

3%

0.35

54

B65857C0063A038

100 

r

3%

0.22

86

B65857C0100A038

160 

r

4%

0.14

138

B65857C0160B038

200 

r

4%

0.11

173

B65857C0200B038

250 

r

5%

0.09

216

B65857C0250J038

315 

r

6%

0.07

272

B65857C0315C038

400 

r

7%

0.05

346

B65857C0400E038

T57

63 

r

3%

0.34

54

B65857C0063A057

100 

r

3%

0.22

86

B65857C0100A057

160 

r

4%

0.13

138

B65857C0160B057

200 

r

4%

0.11

173

B65857C0200B057

250 

r

5%

0.08

216

B65857C0250J057

315 

r

6%

0.07

272

B65857C0315C057

400 

r

7%

0.05

346

B65857C0400E057

T66

63 

r

3%

0.35

54

B65857C0063A066

100 

r

3%

0.22

86

B65857C0100A066

160 

r

4%

0.14

138

B65857C0160B066

200 

r

4%

0.11

173

B65857C0200B066

250 

r

5%

0.09

216

B65857C0250J066

315 

r

6%

0.07

272

B65857C0315C066

400 

r

7%

0.05

346

B65857C0400E066

B65857C

Core

EPX 9/9

epcos-ferrites-and-accessories-html.html
background image

315

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Gapped

Ungapped

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

N45

63 

r

3%

0.34

54

B65857C0063A045

100 

r

3%

0.21

86

B65857C0100A045

160 

r

4%

0.13

138

B65857C0160B045

200 

r

4%

0.10

173

B65857C0200B045

250 

r

5%

0.08

216

B65857C0250J045

315 

r

6%

0.06

272

B65857C0315C045

400 

r

7%

0.05

346

B65857C0400E045

Material

A

L

 value

nH

P

e

Ordering code

N45

2400 +30/–20%

2070

B65857C0000R045

T57

2400 +30/–20%

2070

B65857C0000R057

T38

8000 +40/–30%

6910

B65857C0000Y038

T66

8100 +40/–30%

7000

B65857C0000Y066

B65857C

Core

EPX 9/9

epcos-ferrites-and-accessories-html.html
background image

316

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61596

For transformers featuring high inductance

and low overall height

For power applications

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 1.7 mm

–1

l

e

= 19.2 mm

A

e

= 11.3 mm

2

A

min

= 8.5 mm

2

V

e

= 217 mm

3

Approx. weight

 2.8 g/set

Gapped

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

T38

63 

r

3%

0.22

85

B65841A0063A038

100 

r

3%

0.14

135

B65841A0100A038

160 

r

5%

0.09

216

B65841A0160J038

200 

r

6%

0.07

270

B65841A0200C038

250 

r

7%

0.05

338

B65841A0250E038

T57

63 

r

3%

0.22

85

B65841A0063A057

100 

r

3%

0.14

135

B65841A0100A057

160 

r

5%

0.09

216

B65841A0160J057

200 

r

6%

0.07

270

B65841A0200C057

250 

r

7%

0.05

338

B65841A0250E057

N45

63 

r

3%

0.22

85

B65841A0063A045

100 

r

3%

0.14

135

B65841A0100A045

160 

r

5%

0.08

216

B65841A0160J045

200 

r

6%

0.07

270

B65841A0200C045

250 

r

7%

0.05

338

B65841A0250E045

N87

63 

r

3%

0.22

85

B65841A0063A087

100 

r

3%

0.13

135

B65841A0100A087

160 

r

5%

0.08

216

B65841A0160J087

200 

r

6%

0.06

270

B65841A0200C087

250 

r

7%

0.05

338

B65841A0250E087

B65841

Core

EP 10

epcos-ferrites-and-accessories-html.html
background image

317

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N45

1600 +30/–20%

2160

B65841A0000R045

T57

1600 +30/–20%

2160

B65841A0000R057

N30

2000 +30/–20%

2700

B65841A0000R030

T65

2900 +30/–20%

3920

B65841A0000R065

T38

4800 +40/–30%

6490

B65841A0000Y038

T66

6000 +40/–30%

8100

B65841A0000Y066

N87

1100 +30/–20%

1480

< 0.1 (200 mT, 100 kHz, 100 °C)

B65841A0000R087

B65841

Core

EP 10

epcos-ferrites-and-accessories-html.html
background image

318

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former, squared pins

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180 °C), color code black

Sumikon PM 9630

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 68-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 174

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Terminals

Ordering code

1

12.1

21.5

61.3

8

B65842W1008D001

2

11.6

21.5

63.7

8

B65842W1008D002

B65842

Accessories

EP 10

epcos-ferrites-and-accessories-html.html
background image

319

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Mounting assembly

The set comprises a yoke and a clamp

Yoke

Made of nickel silver (0.4 mm) with ground terminal (tinned)

Clamp

Spring clamp, made of nickel silver (0.3 mm), tinned

Yoke    

Clamp

Ordering code

Complete mounting assembly

B65842S2000X000

B65842

Accessories

EP 10

epcos-ferrites-and-accessories-html.html
background image

320

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

For xDSL line transformers

Outer dimensions of EP10

Optimized design for low distortion

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 1.37 mm

–1

l

e

= 21.7 mm

A

e

= 15.9 mm

2

A

min

= 13.2 mm

2

V

e

= 345 mm

3

Approx. weight

 2.8 g/set

Gapped

Ungapped

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

T38

63 

r

3%

0.31

68

B65859A0063A038

100 

r

3%

0.20

109

B65859A0100A038

160 

r

5%

0.12

174

B65859A0160J038

200 

r

6%

0.10

217

B65859A0200C038

250 

r

7%

0.08

271

B65859A0250E038

T57

63 

r

3%

0.31

68

B65859A0063A057

100 

r

3%

0.20

109

B65859A0100A057

160 

r

5%

0.12

174

B65859A0160J057

200 

r

6%

0.10

217

B65859A0200C057

250 

r

7%

0.08

271

B65859A0250E057

Material

A

L

 value

nH

P

e

Ordering code

T57

2000 +30/–20%

2170

B65859A0000R057

T38

6100 +40/–30%

6630

B65859A0000Y038

B65859

Core

EPX 10

epcos-ferrites-and-accessories-html.html
background image

321

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61596

For transformers featuring high inductance

and low overall height

For power applications

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 1.24 mm

–1

l

e

= 24.2 mm

A

e

= 19.5 mm

2

A

min

= 14.9 mm

2

V

e

= 472 mm

3

Approx. weight

 4.5 g/set

Gapped

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

T38

63 

r

3%

0.39

62

B65843A0063A038

100 

r

3%

0.24

99

B65843A0100A038

160 

r

4%

0.15

158

B65843A0160B038

200 

r

4%

0.12

198

B65843A0200B038

250 

r

5%

0.10

247

B65843A0250J038

315 

r

6%

0.08

311

B65843A0315C038

400 

r

7%

0.06

395

B65843A0400E038

T57

63 

r

3%

0.38

62

B65843A0063A057

100 

r

3%

0.24

99

B65843A0100A057

160 

r

4%

0.15

158

B65843A0160B057

200 

r

4%

0.12

198

B65843A0200B057

250 

r

5%

0.09

247

B65843A0250J057

315 

r

6%

0.07

311

B65843A0315C057

400 

r

7%

0.06

395

B65843A0400E057

T66

63 

r

3%

0.39

62

B65843A0063A066

100 

r

3%

0.24

99

B65843A0100A066

160 

r

4%

0.15

158

B65843A0160B066

200 

r

4%

0.12

198

B65843A0200B066

250 

r

5%

0.10

247

B65843A0250J066

315 

r

6%

0.08

311

B65843A0315C066

400 

r

7%

0.06

395

B65843A0400E066

B65843A

Core

EP 13

epcos-ferrites-and-accessories-html.html
background image

322

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Gapped

Ungapped

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

N45

63 

r

3%

0.38

62

B65843A0063A045

100 

r

3%

0.24

99

B65843A0100A045

160 

r

4%

0.15

158

B65843A0160B045

200 

r

4%

0.12

198

B65843A0200B045

250 

r

5%

0.09

247

B65843A0250J045

315 

r

6%

0.07

311

B65843A0315C045

400 

r

7%

0.05

395

B65843A0400E045

N87

63 

r

3%

0.37

62

B65843A0063A087

100 

r

3%

0.23

99

B65843A0100A087

160 

r

4%

0.14

158

B65843A0160B087

200 

r

4%

0.11

198

B65843A0200B087

250 

r

5%

0.09

247

B65843A0250J087

315 

r

6%

0.07

311

B65843A0315C087

400 

r

7%

0.05

395

B65843A0400E087

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N45

2400 +30/–20%

2370

B65843A0000R045

T57

2500 +30/–20%

2470

B65843A0000R057

N30

2800 +30/–20%

2765

B65843A0000R030

T65

4000 +30/–20%

3950

B65843A0000R065

T38

7000 +40/–30%

6910

B65843A0000Y038

T66

8500 +40/–30%

8400

B65843A0000Y066

N87

1600 +30/–20%

1580

< 0.18 (200 mT, 100 kHz, 100 °C) B65843A0000R087

B65843A

Core

EP 13

epcos-ferrites-and-accessories-html.html
background image

323

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former, squared pins

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180 °C), color code black

Sumikon PM 9630

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 174

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Terminals

Ordering code

1

14.3

23.8

57.1

10

B65844W1010D001

B65844

Accessories

EP 13

epcos-ferrites-and-accessories-html.html
background image

324

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former with closed center flange for high-voltage applications

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180 °C), color code black

Sumikon PM 9630

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 174

Squared pins.

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Terminals

Ordering code

2

13.9

23.8

58.9

10

B65844X1010D002

B65844

Accessories

EP 13

epcos-ferrites-and-accessories-html.html
background image

325

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Mounting assembly

The set comprises a yoke and a clamp

Yoke

Made of cold rolled steel (0.4 mm) with ground terminal (tinned)

Clamp

Spring clamp, made of bronze (0.4 mm)

Yoke    

Clamp

Ordering code

Complete mounting assembly

B65844B2000X000

B65844

Accessories

EP 13

epcos-ferrites-and-accessories-html.html
background image

326

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Recommended for xDSL applications with

transformer height constraints

Low-profile version of EP13 (1.6 mm lower than EP13)

Distortion performance close to EP13

Fully compatible with EP13 coils

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 1.34 mm

–1

l

e

= 25.8 mm

A

e

= 19.3 mm

2

A

min

= 14.9 mm

2

V

e

= 498 mm

3

Approx. weight

 3 g/set

Gapped

Ungapped

Material

A

L

 value

nH

s

approx. mm

P

e

Ordering code

T38

63 

r

3%

0.38

67

B65843P0063A038

100 

r

3%

0.24

106

B65843P0100A038

160 

r

4%

0.15

170

B65843P0160B038

200 

r

4%

0.12

213

B65843P0200B038

250 

r

5%

0.09

266

B65843P0250J038

315 

r

6%

0.07

335

B65843P0315C038

400 

r

7%

0.06

426

B65843P0400E038

T57

63 

r

3%

0.38

67

B65843P0063A057

100 

r

3%

0.24

106

B65843P0100A057

160 

r

4%

0.15

170

B65843P0160B057

200 

r

4%

0.11

213

B65843P0200B057

250 

r

5%

0.09

266

B65843P0250J057

315 

r

6%

0.07

335

B65843P0315C057

400 

r

7%

0.05

426

B65843P0400E057

Material

A

L

 value

nH

P

e

Ordering code

T57

2400 +30/–20%

2550

B65843P0000R057

T38

6600 +40/–30%

7020

B65843P0000Y038

B65843P

Core

EPO 13

epcos-ferrites-and-accessories-html.html
background image

327

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former, squared pins 

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180 °C), color code black

Sumikon PM 9630

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 174

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Terminals

Ordering code

1

14.3

23.8

57.1

10

B65844W1010D001

B65844

Accessories

EPO 13

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background image

328

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former with closed center flange for high-voltage applications

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180 °C), color code black

Sumikon PM 9630

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 174

Squared pins.

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Terminals

Ordering code

2

13.9

23.8

58.9

10

B65844X1010D002

B65844

Accessories

EPO 13

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background image

329

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61596         

For transformers featuring high inductance

and low overall height

For power applications

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.84 mm

–1

l

e

= 28.5 mm

A

e

= 33.9 mm

2

A

min

= 25.5 mm

2

V

e

= 966 mm

3

Approx. weight

 12 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N30

4300 +30/–20%

2870

B65845J0000R030

T65

6200 +30/–20%

4150

B65845J0000R065

T38

10800 +40/–30%

7220

B65845J0000Y038

T66

13000 +40/–30%

8700

B65845J0000Y066

N87

2400 +30/–20%

1600

< 0.4 (200 mT, 100 kHz, 100 °C)

B65845J0000R087

B65845

Core

EP 17

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background image

330

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180 °C), color code black

Sumikon PM 9630

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 174

Squared pins.

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Terminals

Ordering code

1

20.3

28.7

48.6

8

B65846W1008D001

B65846

Accessories

EP 17

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background image

331

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Mounting assembly

The set comprises a yoke and a clamp

Yoke

Made of cold rolled steel (0.4 mm) with ground terminal (tinned)

Clamp

Spring clamp, made of bronze (0.4 mm)

Ordering code

Complete mounting assembly

B65846S2000X000

Yoke

Clamp

B65846

Accessories

EP 17

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background image

332

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61596

For transformers featuring high inductance

and low overall height

For power applications

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.51 mm

–1

l

e

= 40 mm

A

e

= 78 mm

2

A

min

= 60 mm

2

V

e

= 3120 mm

3

Approx. weight

 27.5 g/set

Gapped

Ungapped

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

N87

200 

r

3%

0.47

82

B65847A0200A087

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N30

6700 +30/–20%

2730

B65847A0000R030

T65

10200 +30/–20%

4160

B65847A0000R065

T38

18700 +40/–30%

7630

B65847A0000Y038

N87

4000 +30/–20%

1630

< 1.2 (200 mT, 100 kHz, 100 °C)

B65847A0000R087

B65847

Core

EP 20

epcos-ferrites-and-accessories-html.html
background image

333

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

F

 max. operating temperature 155 °C), color code green

Vyncolit/X611

®

>

E167521 (M)

@

, VYNCOLIT NV

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page  174

Squared pins.

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Terminals

Ordering code

1

35.4

40.6

39.5

10

B65848D1010D001

B65848

Accessories

EP 20

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background image

334

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Mounting assembly

The set comprises a yoke and a clamp

Yoke

Made of nickel bronze (0.4 mm) with ground terminal (tinned)

Clamp

Spring clamp, made of stainless spring steel (0.4 mm)

Yoke

Clamp

Ordering code

Complete mounting assembly

B65848A2000X000

B65848

Accessories

EP 20

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background image

335

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1

General information

P cores (

P

ot cores) are available in a wide range of sizes; 7 types in our product line comply with 

IEC 60133. We offer a choice of different SIFERRIT materials, which permits the cores to be used 
for a large variety of applications to over 100 MHz. Since the wound coil is completely enclosed by 
the ferrite core, P cores feature low magnetic leakage. They can be easily and precisely adjusted 
to the most manifold inductor requirements.

We naturally also supply the appropriate accessories for each core version. Most of the cores are 
available with threaded sleeves and screws for precision inductance adjustment. Adjustment curves 
are given for this purpose. These relate to the particular recommended combination of screw 
core/core material A

L

 value and must be understood as typical values.

2

Applications

The cores are suitable for:

High-quality resonant circuit inductors (filters) with high inductance stability (materials K1, M33, 
N48).

Low-distortion broadband small-signal transformers in materials T38 and N30 with high A

L

 value

Power applications. Here, pot cores without center hole made of material N87 are used as 
standard. As a result of their larger effective magnetic cross-sectional area, these types are 
characterized by a higher A

L

 value, better flux density distribution and, consequently, a reduced 

power loss.

3

Marking

The material and the A

L

 value are always stamped on P cores with a diameter > 5.8 mm, the 

material and “o. L.”(= without air gap) are stamped on ungapped cores. Only one core half of the 
two comprising a set carries the marking. With cores having an unsymmetrical air gap (the total air 
gap is ground into one half) the ground half carries the marking, with cores including a glued-in 
threaded sleeve the half without sleeve is marked.

4

Power loss

For each core type with power materials the maximum power loss is specified in W/set. The flux 
density has been calculated on the basis of a sinusoidal voltage and is referred to the minimum 
cross-sectional area A

min

.

General information

P cores (pot cores)

P cores

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background image

336

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62323

Delivery mode: sets

Magnetic characteristics 

(per set)

6

l

/

A = 3.72 mm

–1

l

e

= 5.10 mm

A

e

= 1.37 mm

2

V

e

= 7 mm

3

Approx. weight

 0.06 g/set

Ungapped

Winding data

Material

A

L

 value

nH

P

e

Ordering code

-C without center hole

K1

25 +40/–30%

75

B65491C0000Y001

N30

500 +40/–30%

1480

B65491C0000Y030

Usable winding cross section A

N

without coil former

mm

2

Average length

of turn A

N

mm

A

R

 value

P:

0.65

5.8

310

B65491

P 3.3 

u

 2.6 through P 41 

u

 25

Core

P 3.3 

u

 2.6

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background image

337

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Miniature pot cores

The unit can be fixed to the terminal

carrier by glue

Space requirements of the inductor 5 

u

 5.1 mm

(without terminals)

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 2.7 mm

–1

l

e

= 7.6 mm

A

e

= 2.8 mm

2

V

e

= 21.3 mm

3

Approx. weight

 0.17 g/set

Ungapped

Material

A

L

 value

nH

P

e

Ordering code

-B with center hole

M33

200 +40/–30%

430

B65495B0000Y033

N30

800 +40/–30%

1730

B65495B0000Y030

B65495

Core

P 4.6 

u

 4.1

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background image

338

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 1.68 mm

–1

l

e

= 7.9 mm

A

e

= 4.7 mm

2

V

e

= 37 mm

3

Approx. weight

 0.2 g/set

Ungapped

 1)

Material

A

L

 value

nH

P

e

Ordering code

-D with center hole

M33

350 +30/–20%

  470

B65501D0000R033

N48

800 +40/–30%

1070

B65501D0000Y048

1) Gapped pot cores on request

B65501

Core

P 5.8 

u

 3.3

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background image

339

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

    

Example of an assembly set         

for printed circuit boards

Individual parts

Part no.

Page

Yoke

B65512

342

Core

B65511

340

Coil former

B65512

341

Core

B65511

340

Terminal carrier

with thread

B65512

342

Core and accessories

P 7 

u

 4

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background image

340

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Delivery mode: sets

Magnetic characteristics 

(per set)

6

l

/

A = 1.43 mm

–1

l

e

= 10 mm

A

e

= 7 mm

2

V

e

= 70 mm

3

Approx. weight

 0.5 g/set

Gapped

Ungapped

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

-A with center hole

K1

25 

r

3%

0.23

28

B65511A0025A001

M33

63 

r

3%

0.13

72

B65511A0063A033

N48

100 

r

3%

0.10

114

B65511A0100A048

Material

A

L

 value

nH

P

e

Ordering code

-A with center hole

N48

1000 +40/–30%

1140

B65511A0000Y048

N30

2000 +40/–30%

2270

B65511A0000Y030

B65511

Core

P 7 

u

 4

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background image

341

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former with positioning lug

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155

q

C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

Winding:

see 

“Processing notes”

, page 175

    

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Ordering code

1

2.2

14.6

240

B65512C0000T001

Positioning lug

B65512

Accessories

P 7 

u

 4

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background image

342

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Mounting assembly for printed circuit boards

The set comprises a terminal carrier and a yoke

For snap-in connection

Terminal carrier

With thread for the adjusting screw

Material:

GFR polyphenylene sulphide (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155

q

C), color code black

Ryton R-4, 

>

E54700 (M)

@

, CHEVRON PHILLIPS CHEMICAL CO L P

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235

q

C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350

q

C, 3.5 s

Yoke

Spring yoke, made of tinned nickel silver (0.2 mm), with ground terminal

Complete mounting assembly (5 solder terminals)

Ordering code: B65512C2001X000

Ground

Thread for

adjusting screw

a) Yoke
b) Terminal carrier with 5 solder terminals

B65512

Accessories

P 7 

u

 4

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background image

343

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

    

Example of an assembly set

for printed circuit boards     

Individual parts

Part no.

Page

Yoke

B65518

347

Core

B65517

344

Coil former

B65522

345

Insulating washer

Core

B65517

344

Terminal carrier

with thread

B65518

347

Also available:

SMD coil former

B65524

346

Core and accessories

P 9 

u

 5

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background image

344

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 60133

Delivery mode: sets

Magnetic characteristics 

(per set)

Approx. weight

 (per set)

Gapped

Ungapped

with center 
hole

without 
center hole

6

l

/

A

l

e

A

e

A

min

V

e

1.25

12.5

10

125

1.13

13.4

11.9

9.3

159

mm

–1

mm

mm

2

mm

2

mm

3

m

0.8

1.0

g

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

 1)

-D with center hole

-T with threaded sleeve

K1

25 

r

3%

0.45

25

B65517+0025A001

40 

r

3%

0.26

40

B65517+0040A001

M33

63 

r

3%

0.20

63

B65517D0063A033

N48

100 

r

3%

0.10

100

B65517+0100A048

160 

r

3%

0.06

159

B65517+0160A048

200 

r

3%

0.04

200

B65517D0200A048

250 

r

5%

0.03

249

B65517D0250J048

Material

A

L

 value

nH

P

e

Ordering code

-D with center hole

-W without center hole

N48

1300 +30/–20%

1290

B65517D0000R048

N30

2500 +30/–20%

2490

B65517D0000R030

T38

5500 +40/–30%

4930

B65517W0000Y038

1) Replace the + by the code letter ”D“ or ”T“ for the required version.

B65517

Core

P 9 

u

 5

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background image

345

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Standard:

to IEC 60133

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085: 

F  max. operating temperature 155 °C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, SABIC INNOVATIVE  PLASTICS

Winding:

see 

“Processing notes”

, page 175

Coil former

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

1

3.6

19.2

183

B65522B0000T001

B65522

Accessories

P 9 

u

 5

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346

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

SMD coil former with gullwing terminals

Material:

GFR liquid crystal polymer (UL 94 V-0, insulation class to IEC 60085: 

F  max. operating temperature 155 °C), color code black

Sumika Super E4008

®

>

E54705 (M)

@

, SUMITOMO CHEMICAL CO LTD

Solderability: to IEC 60068-2-58, test Td, method 6 (Group 3): 245 °C, 3 s
Resistance to soldering heat: to IEC 60068-2-58, test Td, method 6 (Group 3): 255 °C, 10 s

permissible soldering temperature for wire-wrap connection on coil former: 400 °C, 1 s

Winding:

see 

“Processing notes”

, page 175

    

In the 4-terminal version terminals 2, 3, 6 and 7 are omitted.

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Terminals

Ordering code

1

3.4

19.2

194

4

B65524C1004T001

3.4

19.2

194

8

B65524C1008T001

B65524

Accessories

P 9 

u

 5

epcos-ferrites-and-accessories-html.html
background image

347

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Mounting assembly for printed circuit boards

The set comprises a terminal carrier and a yoke

For snap-in connection

Terminal carrier

With thread for the adjusting screw (to be combined with core version ”D“)

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F

 max. operating temperature 155 °C), color code black

Pocan B4235

®

>

E245249 (M)

@

, LANXESS AG

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s

Yoke

Spring yoke, made of tinned nickel silver (0.25 mm), with ground terminal

4 solder terminals

6 solder terminals

Complete mounting assembly

(4 solder terminals)

Ordering code: B65518D2001X000

Complete mounting assembly

(6 solder terminals)

Ordering code: B65518D2002X000

1) 1.3 hole also permissible
a) Yoke
b) Terminal carrier with 4 solder terminals
c) Terminal carrier with 6 solder terminals

M1,4

adjusting screw

Thread for

Ground

M1,4

adjusting screw

Thread for

Hole arrangement

View in mounting

direction

Hole arrangement

View in mounting

direction

Ground

B65518

Accessories

P 9 

u

 5

epcos-ferrites-and-accessories-html.html
background image

348

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

    

Example of an assembly set

for printed circuit boards     

Individual parts

Part no.

Page

Adjusting screw

B65539

B65806

352

Yoke

B65535

351

Core

B65531

349

Coil former

B65532

350

Core

B65531

349

Terminal carrier with thread

B65535

351

Core and accessories

P 11 

u

 7

epcos-ferrites-and-accessories-html.html
background image

349

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 60133

Delivery mode: sets

Magnetic characteristics

 (per set)

Approx. weight

 (per set)         

Gapped

Ungapped

with

center hole

without

center hole

6

l

/

A

l

e

A

e

A

min

V

e

1.0

15.9

15.9

253

0.92

16.3

17.7

14.1

289

mm

–1

mm

mm

2

mm

2

mm

3

m

1.7

1.8

g

Material

A

L

value

nH

s

approx.

mm

P

e

Ordering code

 1)

-D with center hole

-T with threaded sleeve

K1

25 

r

3%

1.00

20

B65531D0025A001

40 

r

3%

0.41

32

B65531D0040A001

M33

40 

r

3%

0.64

32

B65531D0040A033

63 

r

3%

0.38

50

B65531D0063A033

N48

100 

r

3%

0.20

80

B65531D0100A048

160 

r

3%

0.10

127

B65531+0160A048

250 

r

3%

0.06

199

B65531+0250A048

400 

r

5%

0.03

318

B65531D0400J048

Material

A

L

value

nH

P

e

P

V

W/set

Ordering code

-D with center hole

-W without center hole

M33

780 +30/–20%

620

B65531D0000R033

N48

1800 +30/–20%

1430

B65531D0000R048

N30

3500 +30/–20%

2560

B65531W0000R030

T38

7000 +40/–30%

5130

B65531W0000Y038

N87

2000 +30/–20%

1470

< 0.12 (200 mT, 100 kHz, 100 °C) B65531W0000R087

1) Replace the + by the code letter ”D“ or ”T“ for the required version.

B65531

Core

P 11 

u

 7

epcos-ferrites-and-accessories-html.html
background image

350

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Standard:

to IEC 60133

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155 °C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, SABIC INNOVATIVE  PLASTICS

Winding:

see 

“Processing notes”

, page 175

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Ordering code

1

4.2

22

180

B65532B0000T001

B65532

Accessories

P 11 

u

 7

epcos-ferrites-and-accessories-html.html
background image

351

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Mounting assembly for printed circuit boards

The set comprises a terminal carrier and a yoke

For snap-in connection

Terminal carrier

With thread for the adjusting screw (to be combined with core version ”D“)

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085: 

F

 max. operating temperature + 155 °C), color code black

4 solder terminals: Rynite FR 530

®

>

E41938 (M)

@

, E I DUPONT DE NEMOURS & CO

8 solder terminals: Pocan B4235

®

>

E245249 (M)

@

, LANXESS AG

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s

Yoke

Spring yoke, made of tinned nickel silver (0.25 mm), with ground terminal

4 solder terminals

8 solder terminals

Complete mounting assembly

(4 solder terminals)

Ordering code: B65535B0002X000

Complete mounting assembly

(8 solder terminals)

Ordering code: B65535B0003X000

1) 1.3 hole also permissible
a) Yoke
c) Terminal carrier with 8 solder terminals

B65535

Accessories

P 11 

u

 7

epcos-ferrites-and-accessories-html.html
background image

352

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Adjusting screw

Tube core with thread and core brake made of GFR polyterephthalate

Pocan B3235

®

>

E245249 (M)

@

, LANXESS AG

a

b

Figure

Tube core

Ordering code

‡ u

 length (mm) Material

Color code

a

1.81 

u

 2.0

K1

yellow

B65539C1003X001

a

1.81 

u

 2.7

K1

gray

B65539C1002X001

a

1.81 

u

 2.7

N22

red

B65539C1002X022

b

1.81 

u

 3.4

N22

green

B65806C3001X022

B65539, B65806

Accessories

P 11 

u

 7

epcos-ferrites-and-accessories-html.html
background image

353

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

    

Example of an assembly set

for printed circuit boards

Individual parts

Part no.

Page

Adjusting screw

B65549

357

Yoke

B65545

356

Core

B65541

354

Coil former

B65542

355

Insulating washer

Core

B65541

354

Threaded sleeve (glued-in)

Terminal carrier

B65545

356

Core and accessories

P 14 

u

 8

epcos-ferrites-and-accessories-html.html
background image

354

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 60133

Delivery mode: sets

Magnetic characteristics

 (per set)

         

Approx. weight

 (per set)

Gapped

Ungapped

with

center hole

without

center hole

6

l

/

A

l

e

A

e

A

min

V

e

0.8

20

25

20

500

0.73

21

28.7

23.6

603

mm

–1

mm

mm

2

mm

2

mm

3

m

3.2

3.5

g

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

 1)

-D with center hole

-T with threaded sleeve

M33

100 

r

3%

0.30

64

B65541+0100A033

N48

160 

r

3%

0.16

102

B65541+0160A048

250 

r

3%

0.10

159

B65541+0250A048

315 

r

3%

0.08

201

B65541+0315A048

400 

r

3%

0.05

255

B65541+0400A048

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

-D with center hole

-W without center hole

K1

140 +30/–20%

89

B65541D0000R001

M33

970 +30/–20%

618

B65541D0000R033

N48

2100 +30/–20%

1340

B65541D0000R048

N30

4600 +30/–20%

2680

B65541W0000R030

T38

9800 +40/–30%

5710

B65541W0000Y038

N87

2800 +30/–20%

1630

< 0.26 (200 mT, 100 kHz, 100 °C) B65541W0000R087

1) Replace the + by the code letter ”D“ or ”T“ for the required version.

B65541

Core

P 14 

u

 8

epcos-ferrites-and-accessories-html.html
background image

355

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Standard:

to IEC 60133

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature + 155 °C), color code black

Crastin SK 645 FR 

>

E41938 (M)

@

, E I DUPONT DE NEMOURS & CO INC

Winding:

see 

“Processing notes”

, page 175

Coil former

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

1

8.4

28

115

B65542B0000T001

B65542

Accessories

P 14 

u

 8

epcos-ferrites-and-accessories-html.html
background image

356

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Mounting assembly for printed circuit boards

The set comprises a terminal carrier and a yoke

For snap-in connection

Terminal carrier

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085: 

F

 max. operating temperature 155 °C), color code gray

Pocan B4235

®

>

E245249 (M)

@

, LANXESS AG

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s

Yoke

Spring yoke, made of tinned nickel silver (0.25 mm), with ground terminal         

4 solder terminals

6 solder terminals

Complete mounting assembly

(4 solder terminals)

Ordering code: B65545B0009X000

Complete mounting assembly

(6 solder terminals)

Ordering code: B65545B0010X000

*) This recess must be on the side of the grounding pin to ensure that the yoke locks in position.
a) Yoke
b) Terminal carrier with 4 solder terminals
c) Terminal carrier with 6 solder terminals

B65545

Accessories

P 14 

u

 8

epcos-ferrites-and-accessories-html.html
background image

357

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Adjusting screw

Tube core with thread and core brake made of GFR polyterephthalate

Pocan B3235

®

>

E245249 (M)

@

, LANXESS AG

a

b

Figure

Tube core

Ordering code

‡ u

 length (mm) Material

Color code

a

2.6

u

 2.0

N22

white

B65549E0003X023

b

2.76 

u

 2.9

N22

black

B65549E0004X023

B65549

Accessories

P 14 

u

 8

epcos-ferrites-and-accessories-html.html
background image

358

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

    

Example of an assembly set

for printed circuit boards     

Individual parts

Part no.

Page

Adjusting screw

B65659

362

Yoke

B65655

361

Core

B65651

359

Coil former

B65652

360

Insulating washer

Core

B65651

359

Threaded sleeve (glued-in)

Terminal carrier

B65655

361

Core and accessories

P 18 

u

 11

epcos-ferrites-and-accessories-html.html
background image

359

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 60133

Delivery mode: sets

Magnetic characteristics

 (per set)

Approx. weight

 (per set)

Gapped

Ungapped

with

center hole

without

center hole

6

l

/

A

l

e

A

e

A

min

V

e

0.6

25.9

43

1114

0.57

26.6

46.7

33.9

1242

mm

–1

mm

mm

2

mm

2

mm

3

m

6.0

6.6

g

Material

A

L

value

nH

s

approx.

mm

P

e

Ordering code

 1)

-D with center hole

-T with threaded sleeve

K1

40 

r

3%

1.60

19

B65651+0040A001

M33

100 

r

3%

0.60

48

B65651+0100A033

N48

160 

r

3%

0.32

77

B65651+0160A048

250 

r

3%

0.20

120

B65651+0250A048

315 

r

3%

0.15

151

B65651+0315A048

400 

r

3%

0.10

192

B65651+0400A048

500 

r

3%

0.07

240

B65651+0500A048

630 

r

5%

0.05

302

B65651D0630J048

Material

A

L

value

nH

P

e

P

V

W/set

Ordering code

-D with center hole

-W without center hole

N48

2800 +30/–20%

1340

B65651D0000R048

N30

5900 +30/–20%

2680

B65651W0000R030

T38

12600 +40/–30%

5710

B65651W0000Y038

N87

3600 +30/–20%

1630

< 0.46 (200 mT, 100 kHz, 100 °C) B65651W0000R087

1) Replace the + by the code letter ”D“ or ”T“ for the required version.

B65651

Core

P 18 

u

 11

epcos-ferrites-and-accessories-html.html
background image

360

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Standard:

to IEC 60133

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155 °C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

Winding:

see 

“Processing notes”

, page 175

Coil former

Coil former

Bestellnummer

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

1

16

35.6

87

B65652B0000T001

B65652

Accessories

P 18 

u

 11

epcos-ferrites-and-accessories-html.html
background image

361

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Mounting assembly for printed circuit boards

The set comprises a terminal carrier and a yoke

For snap-in connection

Terminal carrier

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085: 

F

 max. operating temperature 155 °C), color code gray

Pocan B4235

®

>

E245249 (M)

@

, LANXESS AG

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s

Yoke

Spring yoke, made of tinned nickel silver (0.3 mm), with ground terminal         

4 solder terminals

8 solder terminals

Complete mounting assembly

(4 solder terminals)

Ordering code: B65655B0009X000

Complete mounting assembly

(8 solder terminals)

Ordering code: B65655B0010X000

*) This recess must be on the side of the grounding pin to ensure that the yoke locks in position.
a) Yoke
b) Terminal carrier with 4 solder terminals
c) Terminal carrier with 8 solder terminals

FPK0295-U

20.1 max.

20.1 max.

Ground

*)

13.5 max.

3.5

a

b

20.7 max.

ø1.3+0.1

2.54

4

5

8

1

Ground

Hole arrangement
View in mounting
direction

FPK0296-3

20.1 max.

20.1 max.

Ground

*)

13.5 max.

3.5

a

c

20.7 max.

ø1.3+0.1

2.54

4

5

8

1

Ground

Hole arrangement
View in mounting
direction

B65655

Accessories

P 18 

u

 11

epcos-ferrites-and-accessories-html.html
background image

362

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Adjusting screw

Tube core with thread and core brake made of GFR polyterephthalate

Pocan B3235

®

>

E245249 (M)

@

, LANXESS AG

a

b

c

Figure

Tube core

Ordering code

‡ u

 length (mm) Material

Color code

a

2.62 

u

 3.6

K1

green

B65659F0001X001

a

2.62 

u

 3.6

N22

red

B65659F0001X023

b

2.75 

u

 4.4

N22

black

B65659F0003X023

c

2.82 

u

 4.4

N22

yellow

B65659F0004X023

B65659

Accessories

P 18 

u

 11

epcos-ferrites-and-accessories-html.html
background image

363

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

    

Example of an assembly set

for printed circuit boards     

Individual parts

Part no.

Page

Adjusting screw

B65812

366

Core

B65661

364

Coil former

B65662

365

Insulating washer

Core

B65661

364

FPK0332-3

Core and accessories

P 22 

u

 13

epcos-ferrites-and-accessories-html.html
background image

364

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 60133

Delivery mode: sets

Magnetic characteristics

 (per set)

Approx. weight

 (per set)

Gapped

Ungapped

with

center hole

without

center hole

6

l

/

A

l

e

A

e

A

min

V

e

0.5

31.6

63

1990

0.46

33.2

72.6

58.1

2410

mm

–1

mm

mm

2

mm

2

mm

3

m

13

14

g

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

 1)

-D with center hole

-N with threaded sleeve

N48

160 

r

3%

0.50

64

B65661+0160A048

250 

r

3%

0.26

100

B65661+0250A048

315 

r

3%

0.22

126

B65661+0315A048

630 

r

3%

0.10

251

B65661+0630A048

1250 

r

10%

0.05

499

B65661D1250K048

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

-D with center hole

-W without center hole

K1

220 +30/–20%

88

B65661D0000R001

N48

3800 +30/–20%

1520

B65661D0000R048

N30

8300 +30/–20%

3020

B65661W0000R030

T38

16000 +40/–30%

5820

B65661W0000Y038

N87

4400 +30/–20%

1600

< 1.1 (200 mT, 100 kHz, 100 °C)

B65661W0000R087

1) Replace the + by the code letter ”D“ or ”N“ for the required version.

B65661

Core

P 22 

u

 13

epcos-ferrites-and-accessories-html.html
background image

365

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Standard:

to IEC 60133

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085: 

F  max. operating temperature 155 °C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, SABIC INNOVATIVE  PLASTICS

Winding:

see 

“Processing notes”

, page 175

Coil former    

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

1

23.4

44

67

B65662B0000T001

B65662

Accessories

P 22 

u

 13

epcos-ferrites-and-accessories-html.html
background image

366

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Adjusting screw

Tube core with thread and core brake made of GFR polyterephthalate

Pocan B3235

®

>

E245249 (M)

@

, LANXESS AG

Tube core

Ordering code

‡ u

 length (mm)

Material

Color code

3.85 

u

 5.0

N22

gray

B65812B3003X022

B65812

Accessories

P 22 

u

 13

epcos-ferrites-and-accessories-html.html
background image

367

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

    

Example of an assembly set

for printed circuit boards

Individual parts

Part no.

Page

Adjusting screw

B65679

371

Yoke

B65675

370

Core

B65671

368

Coil former

B65672

369

Insulating washer

Core

B65671

368

Threaded sleeve (glued-in)

Terminal carrier

B65675

370

Core and accessories

P 26 

u

 16

epcos-ferrites-and-accessories-html.html
background image

368

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 60133

Delivery mode: sets

Magnetic characteristics

 (per set)

Approx. weight

 (per set)         

Gapped

Ungapped

with

center hole

without

center hole

6

l

/

A

l

e

A

e

A

min

V

e

0.4

37.2

93

76.5

3460

0.37

40

108

87

4320

mm

–1

mm

mm

2

mm

2

mm

3

m

21

23

g

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

 1)

-D with center hole

-T with threaded sleeve

K1

100 

r

3%

0.90

32

B65671+0100A001

M33

100 

r

3%

1.52

32

B65671+0100A033

160 

r

3%

0.78

51

B65671+0160A033

N48

160 

r

3%

0.80

51

B65671+0160A048

250 

r

3%

0.40

80

B65671+0250A048

315 

r

3%

0.34

100

B65671+0315A048

400 

r

3%

0.24

127

B65671+0400A048

630 

r

3%

0.15

201

B65671+0630A048

800 

r

3%

0.11

255

B65671+0800A048

1000 

r

5%

0.10

318

B65671D1000J048

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

-D with center hole

-W without center hole

N48

4900 +30/–20%

1560

B65671D0000R048

N30

9700 +30/–20%

2860

B65671W0000R030

T38

22000 +40/–30%

6480

B65671W0000Y038

N87

5500 +30/–20%

1620

< 1.9 (200 mT, 100 kHz, 100 °C)

B65671W0000R087

1) Replace the + by the code letter ”D“ or ”T“ for the required version.

B65671

Core

P 26 

u

 16

epcos-ferrites-and-accessories-html.html
background image

369

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Standard:

to IEC 60133

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155 °C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, SABIC INNOVATIVE  PLASTICS

Winding:

see 

“Processing notes”

, page 175

Coil former

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

1

32.0

52

55

B65672B0000T001

B65672

Accessories

P 26 

u

 16

epcos-ferrites-and-accessories-html.html
background image

370

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Mounting assembly for printed circuit boards

The set comprises a terminal carrier and a yoke

For snap-in connection

Terminal carrier

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085: 

F

 max. operating temperature 155 °C), color code gray

Pocan B4235

®

>

E245249 (M)

@

, LANXESS AG

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s

Yoke

Spring yoke, made of tinned nickel silver (0.4 mm), with ground terminal

Complete mounting assembly (8 solder terminals)

Ordering code: B65675B0005X000

a) Yoke
b) Terminal carrier with 8 solder terminals

Hole arrangement

View in mounting direction

This recess must be on the side of the

grounding pin to ensure that the yoke

locks into position.

Grounding pin

Ground

B65675

Accessories

P 26 

u

 16

epcos-ferrites-and-accessories-html.html
background image

371

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Adjusting screw

Tube core with thread and core brake made of GFR polyterephthalate

Pocan B3235

®

>

E245249 (M)

@

, LANXESS AG

Note:

Due to the limited distance between adjusting screw and internal borehole, the entire assembly 
must be accurately centered.

Tube core

Ordering code

‡ u

 length (mm)

Material

Color code

4.55 

u

 6.3

N22

red

B65679E0003X022

4.98 

u

 6.3

N22

black

B65679E0002X022

B65679

Accessories

P 26 

u

 16

epcos-ferrites-and-accessories-html.html
background image

372

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

    

Example of an assembly set

for printed circuit boards

Individual parts

Part no.

Page

Adjusting screw

B65679

376

Yoke

B65705

375

Core

B65701

373

Coil former

B65702

374

Insulating washer

Core

B65701

373

Threaded sleeve (glued-in)

Terminal carrier

B65705

375

Core and accessories

P 30 

u

 19

epcos-ferrites-and-accessories-html.html
background image

373

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 60133

Delivery mode: sets

Magnetic characteristics

 (per set)

Approx. weight

 (per set)

Gapped

Ungapped

with

center  hole

without

center  hole

6

l

/

A

l

e

A

e

A

min

V

e

0.33

45

136

6120

0.32

46

145

117

6670

mm

–1

mm

mm

2

mm

2

mm

3

m

36

38

g

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

 1)

-D with center hole

-T with threaded sleeve

N48

250 

r

3%

0.72

66

B65701+0250A048

400 

r

3%

0.40

105

B65701+0400A048

630 

r

3%

0.22

166

B65701+0630A048

1000 

r

3%

0.12

263

B65701+1000A048

2000 

r

10%

0.05

527

B65701D2000K048

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

-D with center hole

-W without center hole

N48

6200 +30/–20%

1630

B65701D0000R048

N30

11500 +30/–20%

2900

B65701W0000R030

T38

28000 +40/–30%

7070

B65701W0000Y038

N87

6400 +30/–20%

1620

< 2.5 (200 mT, 100 kHz, 100 °C)

B65701W0000R087

1) Replace the + by the code letter ”D“ or ”T“ for the required version.

B65701

Core

P 30 

u

 19

epcos-ferrites-and-accessories-html.html
background image

374

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Standard:

to IEC 60133

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F  max. operating temperature 155 °C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, SABIC INNOVATIVE  PLASTICS

Winding:

see 

“Processing notes”

, page 175

Coil former

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

1

48

60

46

B65702B0000T001

B65702

Accessories

P 30 

u

 19

epcos-ferrites-and-accessories-html.html
background image

375

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Mounting assembly for printed circuit boards

The set comprises a terminal carrier and a yoke

For snap-in connection

Terminal carrier

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 85: 

F

 max. operating temperature 155 °C), color code gray

Pocan B4235

®

>

E245249 (M)

@

, LANXESS AG

Solderability: to IEC 68-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 68-2-20, test Tb, method 1B: 350 °C, 3.5 s

Yoke

Spring yoke, made of tinned nickel silver (0.5 mm), with ground terminal         

    

Complete mounting assembly (8 solder terminals)

Ordering code: B65705B0003X000

1) The 2.8 mm hole is only necessary for additional fixing with M 2.5 screw.
a) Yoke
b) Terminal carrier with 8 solder terminals

Hole arrangement

View in mounting direction

This recess must be on the side of the

grounding pin to ensure that the yoke

locks into position.

Grounding pin

Ground

B65705

Accessories

P 30 

u

 19

epcos-ferrites-and-accessories-html.html
background image

376

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Adjusting screw

Tube core with thread and core brake made of GFR polyterephthalate

Pocan B3235

®

>

E245249 (M)

@

, LANXESS AG 

Note:

Due to the limited distance between adjusting screw and internal borehole, the entire assembly 
must be accurately centered.

Tube core

Ordering code

‡ u

 length (mm)

Material

Color code

4.55 

u

 6.3

N22

red

B65679E0003X022

4.98 

u

 6.3

N22

black

B65679E0002X022

B65679

Accessories

P 30 

u

 19

epcos-ferrites-and-accessories-html.html
background image

377

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

    

Example of an assembly set

for printed circuit boards

Individual parts

Part no.

Page

Adjusting screw

B65679

381

Yoke

B65615

380

Core

B65611

378

Coil former

B65612

379

Insulating washer

Core

B65611

378

Threaded sleeve (glued-in)

Terminal carrier

B65615

380

Core and accessories

P 36 

u

 22

epcos-ferrites-and-accessories-html.html
background image

378

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Delivery mode: sets

Magnetic characteristics

 (per set)

Approx. weight

 (per set)

Gapped

Ungapped

with

center hole

without

center hole

6

l

/

A

l

e

A

e

A

min

V

e

0.26

52

202

10500

0.25

53.5

213

173

11400

mm

–1

mm

mm

2

mm

2

mm

3

m

57

59.5

g

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

 1)

-D with center hole

-T with threaded sleeve

N48

250 

r

3%

1.20

51

B65611+0250A048

400 

r

3%

0.62

82

B65611+0400A048

630 

r

3%

0.35

129

B65611+0630A048

1000 

r

3%

0.22

205

B65611+1000A048

Material

A

L

 value

nH

P

e

Ordering code

-D with center hole

-W without center hole

N48

7600 +30/–20%

1560

B65611D0000R048

N30

15200 +30/–20%

3040

B65611W0000R030

1) Replace the + by the code letter ”D“ or ”T“ for the required version.

B65611

Core

P 36 

u

 22

epcos-ferrites-and-accessories-html.html
background image

379

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Standard:

to IEC 60133

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085: 

F  max. operating temperature 155 °C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, SABIC INNOVATIVE  PLASTICS

Winding:

see 

“Processing notes”

, page 175

Coil former

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

1

63

73

39

B65612B0000T001

B65612

Accessories

P 36 

u

 22

epcos-ferrites-and-accessories-html.html
background image

380

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Mounting assembly for printed circuit boards

The set comprises a terminal carrier and a yoke

For snap-in connection

Terminal carrier

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085: 

F

 max. operating temperature 155 °C), color code black

Pocan B4235

®

>

E245249 (M)

@

, LANXESS AG

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s

Yoke

Spring yoke, made of nickel silver (0.6 mm), with ground terminal           

Complete mounting assembly (10 solder terminals)

Ordering code: B65615B0001X000

B65615

Accessories

P 36 

u

 22

epcos-ferrites-and-accessories-html.html
background image

381

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Adjusting screw

Tube core with thread and core brake made of GFR polyterephthalate

Pocan B3235

®

>

E245249 (M)

@

, LANXESS AG

Note:

Due to the limited distance between adjusting screw and internal borehole, the entire assembly 
must be accurately centered.

Tube core

Ordering code

‡ u

 length (mm)

Material

Color code

4.55 

u

 6.3

N22

red

B65679E0003X022

4.98 

u

 6.3

N22

black

B65679E0002X022

B65679

Accessories

P 36 

u

 22

epcos-ferrites-and-accessories-html.html
background image

382

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Example of an assembly set

Individual parts

Part no.

Page

Yoke

B65623

384

Core

B65621

383

Core

B65621

383

Base plate with 2 tubular rivets

B65623

384

Core and accessories

P 41 

u

 25

epcos-ferrites-and-accessories-html.html
background image

383

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.264 mm

–1

l

e

= 60.4 mm

A

e

= 229 mm

2

A

min

= 201 mm

2

V

e

= 13832 mm

3

Approx. weight

 82 g/set

Gapped

Ungapped

Material

A

L

value

nH

s

approx.

mm

P

e

Ordering code

-J with center hole

N48

250 

r

3%

1.35

51

B65621J0250A048

630 

r

3%

0.43

129

B65621J0630A048

3150 

r

10%

0.05

643

B65621J3150K048

Material

A

L

value

nH

P

e

Ordering code

-J with center hole

N48

8400 +30/–20%

1720

B65621J0000R048

B65621

Core

P 41 

u

 25

epcos-ferrites-and-accessories-html.html
background image

384

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Mounting assembly for chassis mounting

The set comprises a yoke and a metal base plate

Fixing by screws or rivets

Yoke

Spring yoke, made of nickel silver (0.5 mm)

    

Complete mounting assembly (with tubular rivets)

Ordering code: B65623A0001X000

a) Yoke
b) Base plate
c) Tubular rivets

Rivet!

B65623

Accessories

P 41 

u

 25

epcos-ferrites-and-accessories-html.html
background image

385

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.22 mm

–1

l

e

= 69.1 mm

A

e

= 310 mm

2

A

min

= 263 mm

2

V

e

= 21428 mm

3

Approx. weight

 125 g/set

Gapped

Ungapped

Material

A

L

value

nH

s

approx.

mm

P

e

Ordering code

-J with center hole

N48

100 

r

3%

3.9

18

B65631J0100A048

250 

r

3%

1.5

44

B65631J0250A048

Material

A

L

value

nH

P

e

Ordering code

-J with center hole

N48

9500 +30/–20%

1690

B65631J0000R048

B65631

Core

P 47 

u

 28

epcos-ferrites-and-accessories-html.html
background image

386

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 0.181 mm

–1

l

e

= 88 mm

A

e

= 485 mm

2

A

min

= 445 mm

2

V

e

= 42680 mm

3

Approx. weight

 270 g/set

Gapped

Ungapped

Material

A

L

value

nH

s

approx.

mm

P

e

Ordering code

-K with center hole

N48

100 

r

3%

6

14

B65691K0100A048

1000 

r

3%

0.57

144

B65691K1000A048

6500 

r

10%

0.06

940

B65691K6500K048

Material

A

L

value

nH

P

e

Ordering code

-K with center hole

N48

12500 +30/–20%

1800

B65691K0000R048

B65691

Core

P 59 

u

 36

epcos-ferrites-and-accessories-html.html
background image

387

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Inductive proximity switches can be used as noncontacting motion detectors and output indicators. 
Possible applications:

– Detection of the final position on conveyor belts

– Counters at rotating parts

– Contactless detection of pointer position of pointer-type measuring and control instruments

The advantages of proximity switches are bounceless switching, no mechanical wear, insensitivity 
to contamination and detection of metallic parts only.

We supply P core halves/PS cores with diameters ranging from 7.35 to 150 mm for inductive 
proximity switches. Their dimensions are matched to standardized switches. Maximum operating 
distances can thus be achieved for the individual P core sizes. The SIFERRIT material N22 is 
particularly suitable for the frequency range from 0.1 to 0.8 MHz. The material M33 is additionally 
available for higher frequencies (core types with 5.6 to 14.0 mm diameter).

Thermoplastic coil formers can be supplied for most of the core types. This material permits an 
operating temperature range of –60 to +120 °C. Consequently, temperatures of up to +120 °C are 
also permissible during encapsulation.

General information

P core halves for proximity switches (PS cores)

P core halves for proximity switches (incl. PS cores)

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background image

388

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core

To IEC 62323

Recommended for new designs

For inductive proximity switches

Material N22 for the frequency

range from about 80 to 800 kHz

Material M33 for higher

frequencies up to about 1.6 MHz

Coil former with positioning lug

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F

max. operating temperature 155 °C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

Material

Approx. weight

g

Ordering code

N22

0.3

B65933A0000X022

M33

0.3

B65933A0000X033

A

N

mm

2

l

N

mm

A

R

value

P:

Ordering code

2.2

14.6

240

B65512C0000T001

Positioning lug

B65933, B65512

PS 7.35 

u

 3.6 through P core half 150 

u

 30

Core and accessories

PS 7.35 

u

 3.6

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389

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core

To IEC 62323

Recommended for new designs

For inductive proximity switches

Material N22 for the frequency

range from about 80 to 800 kHz

Material M33 for higher

frequencies up to about 1.6 MHz

Coil former with positioning lug

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F

max. operating temperature 155 °C), color code black

Pocan B4235

®

>

E245249 (M)

@

, LANXESS AG        

Material

Approx. weight

g

Ordering code

N22

0.6

B65935E0000X022

M33

0.6

B65935E0000X033

A

N

mm

2

l

N

mm

A

R

value

P:

Ordering code

1.5

18.6

470

B65936A0000T001

Positioning lug

B65935, B65936

Core and accessories

PS 9 

u

 3.5

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390

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core

For inductive proximity switches

Material N22 for the frequency

range from about 70 to 700 kHz

Coil former

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F

max. operating temperature 155 °C), color code black

Crastin SK 645 FR

®

>

E41938 (M)

@

, E I DUPONT DE NEMOURS & CO INC  

Material

Approx. weight

g

Ordering code

N22

2.5

B65937A0000X022

A

N

mm

2

l

N

mm

A

R

value

P:

Ordering code

8.4

28

115

B65542B0000T001

B65937, B65542

Core and accessories

P core half 14 

u

 7.5

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391

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core

To IEC 62323

Recommended for new designs

For inductive proximity switches

Material N22 for the frequency

range from about 60 to 600 kHz

Coil former

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F

max. operating temperature 155 °C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, SABIC INNOVATIVE  PLASTICS

Material

Approx. weight

g

Ordering code

N22

9

B65939A0000X022

A

N

mm

2

l

N

mm

A

R

value

P:

Ordering code

16.7

51

105

B65940B0000T001

B65939, B65940

Core and accessories

PS 25 

u

 8.9

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392

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core

To IEC 62323

Recommended for new designs

For inductive proximity switches

Material N22 for the frequency

range from about 50 to 500 kHz

Coil former

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F

max. operating temperature 155 °C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V        

Material

Approx. weight

g

Ordering code

N22

18

B65941A0000X022

A

N

mm

2

l

N

mm

A

R

value

P:

Ordering code

24.4

62

87

B65942B0000T001

B65941, B65942

Core and accessories

PS 30.5 

u

 10.2

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393

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62323

Recommended for new designs

For inductive proximity switches

Material N22 for the frequency

range from about 40 to 400 kHz

Material

Approx. weight

g

Ordering code

N22

28

B65947A0000X022

B65947

Core

PS 35 

u

 10.8

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394

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Recommended for new designs

For inductive proximity switches

Material N22 for the frequency

range from about 30 to 300 kHz

Material

Approx. weight

g

Ordering code

N22

62

B65943A0000X022

B65943

Core

PS 47 

u

 14.9

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background image

395

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core

To IEC 62323

Recommended for new designs

For inductive proximity switches

Material N22 for the frequency

range from about 20 to 200 kHz

Coil former

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F

max. operating temperature 155 °C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, SABIC INNOVATIVE  PLASTICS

Material

Approx. weight

g

Ordering code

N22

130

B65928A0000X022

A

N

mm

2

l

N

mm

A

R

value

P:

Ordering code

77

140

62

B65946B0000T001

B65928, B65946

Core and accessories

PS 68 

u

 14.5

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background image

396

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core

For inductive proximity switches

Material N22 for the frequency

range from about 20 to 200 kHz

Coil former

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F

max. operating temperature 155 °C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V         

Material

Approx. weight

g

Ordering code

N22

160

B65945A0000X022

A

N

mm

2

l

N

mm

A

R

value

P:

Ordering code

77

140

62

B65946B0000T001

B65945, B65946

Core and accessories

P core half 70 

u

 14.5

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04/13

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Large-volume pot core

Unground core for inductive proximity

switches with wide operating distances

Application examples:
– Rotary transformers for non-contact

power and information transmission

– Inductive power transmission

(non-contact charging of electric cars)

Options:
a) Ground version for transformers

up to 30 kW

b) Core height up to 45 mm for

transformers up to 100 kW

Magnetic characteristics 

for option a)

(per set)

6

l

/

A = 0.044 mm

–1

l

e

= 160 mm

A

e

= 3580 mm

2

A

min

= 2800 mm

2

V

e

= 566000 mm

3

Material

Approx. weight

g

Ordering code

N27

1700

B65949A0000X027

B65949

Core

P core half 150 

u

 30

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epcos-ferrites-and-accessories-html.html
background image

399

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1

Core shapes and materials

The preferred materials for manufacture of E cores are the SIFERRIT materials N27, N87, T46 and 
N30. N27 is recommended for power applications in the frequency range up to about 100 kHz and 
N87 for the frequency range up to 500 kHz; EFD cores made of N49 are particularly suitable for 
frequencies f >500 kHz. These materials feature a high saturation flux density and low power loss.

Material N30 is particularly suitable for broadband small-signal applications and also for interfer-
ence suppression chokes.

The E core spectrum contained in this data book comprises five basic core shapes, which can be 
used not only for transformers but also for chokes with a power capacity of up to 10 kW.

a) Types with round center leg

We offer the following types:

ER cores

EQ cores

ETD cores to IEC 61185 (Economic Transformer Design)

E cores with round center leg offer the advantage of easy winding, particularly when thick winding 
wires are used, compact mounting dimensions and wide openings on each side. ETD cores have 
the additional benefit of an almost constant cross section along the magnetic path. A wide variety 
of optimized accessories is available. ER cores in sizes 9.5 and 11/5 are particularly suitable for 
designing transformers with low overall height and high inductance. They come in material T38 for 
broadband applications plus in N87 and N49 for power transformers for frequencies up to and over 
500 kHz.

b) Types with rectangular center leg

E cores

EFD cores (Economic Flat Transformer Design); EV cores

The conventional E cores with rectangular center leg are available in a wide variety of sizes.

EFD cores have an optimized cross section and enable the design of very flat and compacts trans-
formers, even for high-frequency applications.

c) ELP cores (E Low Profile)

ELP cores enable the design of very flat transformers and feature excellent thermal performance 
due to the large core surface. ELP cores are now specified in IEC 62317-9.

General information

E cores

E cores

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04/13

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

2

Ordering, marking, delivery

E cores are supplied as single units (except ER 9.5, ER 11 and ER 14.5/6: in sets), with each packing 
unit (PU) exclusively containing cores with or without shortened center leg (air gap dimension „g“).

Gapped EFD cores are supplied with toleranced A

L

 value as specified in the data sheets. All other 

E cores are availble with toleranced A

L

 value on request.

There are two possibilites of air gap distribution, either symmetrical (each core of a set has the same 
air gap size) or unsymmetrical (a gapped core is combined with an ungapped core).

E and U cores are marked using the same system. Hence, the following description applies to both 
core shapes.

E 5

,

E 6.3, E 8.8, EFD 10 

and

 I cores

 are not marked.

E cores 

are marked by an ink-jet printer on the outside of the legs (figure 1).

Fig. 1

Marking by ink-jet printer

Gapped cores :

with toleranced air gap: material, date code and size of air gap,

e.g.: 27 B2 1.5
with toleranced A

L

 value:

symmetrical version: material, date code, A

L

 value and code for A

L

 value

tolerance, e.g.: 27 B230A
unsymmetrical version: material, date code and size of air gap,

e.g.: 27 B2 1.5

Ungapped cores are marked with material and date code, e.g.: 27 B2.

General information

E cores

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04/13

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Depending on their height and width, there is not enough space on all cores for complete marking, 
meaning that simplification is necessary. So only the material and the date code will be stated. This 
ensures that there is space for at least one complete marking (two characters per line) on the core. 
To avoid confusion of names like N27 and N72, the beginning of the material designation coincides 
with the position of the letter in the date code.

Example:

                    727272

                    2B2B2B

means N27 (not N72)

Remark: in some exception cases parts are stamped with rolls on the back (gapped EFD 15 for 
example).

Date code:

Date coding is based on a two-week period (see tables, counting by calendar weeks CW).

In the following year lines 1 and 2 will we swapped (material and date code). The position of letters 
and digits will not be swapped. Counting started in 1996.

Coding of two-week production periods

Coding of week day

The black ink is insoluble in water, but it will dissolve in fluids based on ketones. It will also dissolve 
if left for a long time in an ultrasonic bath. Different colored markings are not feasible.

CW

Code

CW

Code

CW

Code

  1 and   2

A

19 and 20

J

37 and 38

S

  3 and   4

B

21 and 22

K

39 and 40

T

  5 and   6

C

23 and 24

L

41 and 42

U

  7 and   8

D

25 and 26

M

43 and 44

V

  9 and 10

E

27 and 28

N

45 and 46

W

11 and 12

F

29 and 30

O

47 and 48

X

13 and 14

G

31 and 32

P

49 and 50

Y

15 and 16

H

33 and 34

Q

51 and 52

Z

17 and 18

I

35 and 36

R

53

AA

Day

Code

Day

Code

CW

n

Monday

1

CW

n+1

Monday

6

Tuesday

2

Tuesday

7

Wednesday

3

Wednesday

8

Thursday

4

Thursday

9

Friday

5

Friday

0

Saturday

5

Saturday

0

Sunday

+

Sunday

General information

E cores

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04/13

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

3

Cores with toleranced air gap

The following tolerances for dimension „g“ apply to all E cores:        

As is the case with ungapped cores, a certain degree of roughness cannot be avoided on the 
ground surfaces of the outer legs.

4

Cores with toleranced A

L

 value

The tolerance of the A

L

 value depends on the magnitude of the A

L

 value and the core shape.

Tolerance figures are therefore given only on a core-type-specific basis.

5

Calculation formulae

Calculation formulae a) and b) apply to the A

L

 value under the following measuring conditions:

Measuring flux density 

d

0.25 mT, measuring frequency f = 10 kHz,

measuring temperature T = 25 

r

3 °C, measuring coil: N = 100 turns, fully wound

a) Air gap and 

A

L

 value

The typical A

L

 value tabulated in the individual data sheets refers to a core set comprising a gapped 

core with dimension „g“ and an ungapped core with „g“ approx. 0.

By inserting the core-specific constants K1 and K2, a nominal A

L

 value can be calculated for the 

materials N27 and N87 within the relevant quoted air-gap validity range:

Production variations with regard to 

P

i

 and grinding quality should be taken into account additionally.

b) DC magnetic bias I

DC

By using the core-shape-related factors K3 and K4, nominal values can be determined for the DC 
magnetic biasing characteristic of E, ETD and EFD cores made of N27 and N87 and ELP cores 
made of N87 at temperature 25 °C and 100 °C.

The direct current I

DC

 at which the A

L

 value drops by 10% compared to the A

L

 value without 

magnetic biasing (I

DC

= 0 A) is determined for a coil with 100 turns.

Calculation of I

DC

 at T = 25 °C:

The factors K3 and K4 for T = 25 °C and the A

L

 value without magnetic biasing are inserted into the 

equation for the calculation.

Dimension g

mm

Tolerance

mm

g < 0.10 mm

r

0.01

0.10 mm 

d

 g < 0.5

r

0.02

g

t

0.5

r

0.05

B

s

A

L

K1

-------

©

¹

§

·

1

K2

----------

=

s

mm

>

@

=

A

L

nH

>

@

=

General information

E cores

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04/13

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Calculation of I

DC

 at T = 100 °C:

The factors K3 and K4 for T = 100 °C are inserted into the equation for the calculation. The value 
for T = 25 °C without magnetic biasing should be used here as the A

L

 value.

6

Magnetic characteristics

The set characteristics 

6

l

/

A, l

e

, A

e

, A

min

 and V

e

 required for the calculation of field strength, flux 

density and hysteresis losses have been determined to IEC 60205 (A

min

 = minimum cross section 

relative to the nominal dimensions).

7

Core  losses

The maximum power loss for each core type is specified in W/set together with the measurement 
parameters. The flux density has been calculated on the basis of a sinusoidal voltage and is referred 
to the minimum cross-sectional area A

min

.

8

Accessories

The coil formers for all ETD, EFD and ER cores and most of the E cores are designed so that they 
can be wound fully automatically.

With the ETD cores and most E cores, each core half and its mounting assembly can be fitted to 
the coil former from the same side, thus permitting simple fully automatic assembly.

If coil formers are used for cores with a rectangular cross section (E cores), the indication of the 
winding height represents only a theoretical value. The use of thicker wires or litz wires results in a 
gradual rounding of the winding from layer to layer. In such cases the planned winding design 
should be verified by means of a winding test.

SMD coil formers are available as accessory.

I

DC

0.9 A

˜

L

K3

-------------------

©

¹

§

·

1

K4

----------

=

I

DC

A

> @

=

A

L

nH

>

@

=

(without magnetic biasing)

General information

E cores

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404

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61246

For small impedance-matching

transformers in telecom applications

For miniature transformers, e.g. DC/DC

converters for surface mounting 

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 4.86 mm

–1

l

e

= 12.6 mm

A

e

= 2.6 mm

2

A

min

= 2.5 mm

2

V

e

= 33 mm

3

Approx. weight

 0.16 g/set

Ungapped   

Material

A

L

 value

nH

P

e

Ordering code

N87

270 +30/–20%

1000

B66303G0000X187

T38

1400 +40/–30%

5190

B66303G0000X138

B66303

E 5 through E 80/38/20

Core

E 5

epcos-ferrites-and-accessories-html.html
background image

405

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61246

For miniature transformers, e.g. DC/DC

converters for surface mounting

Available with SMD coil former

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 3.7 mm

–1

l

e

= 12.2 mm

A

e

= 3.3 mm

2

A

min

= 2.6 mm

2

V

e

= 40.3 mm

3

Approx. weight

 0.24 g/set

Ungapped   

Material

A

L

 value

nH

P

e

Ordering code

N87

380 +30/–20%

1120

B66300G0000X187

N30

700 +40/–30%

2059

B66300G0000X130

T38

1700 +40/–30%

4990

B66300G0000X138

B66300

Core

E 6.3

epcos-ferrites-and-accessories-html.html
background image

406

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

SMD coil former with gullwing terminals

Material:

GFR liquid crystal polymer (UL 94 V-0, insulation class to IEC 60085:

F

 max. operating temperature 155 °C), color code black

B66301B: Vectra E 130i 

>

E106764 (M)

@

, POLYPLASTICS CO LTD

B66301B: 

Vectra E 130i 

>

E83005 (M)

@

, TICONA

B66301C: Vectra C 130 

>

E106764 (M)

@

, POLYPLASTICS CO LTD

Solderability: to IEC 60068-2-58, test Td, method 6 (Group 3): 245 °C, 3 s
Resistance to soldering heat: to IEC 60068-2-58, test Td, method 6 (Group 3): 255 °C, 10 s

permissible soldering temperature for wire-wrap connection on coil former: 400 °C, 1 s

Winding:

see 

“Processing notes”

, page 179

Plastic cover cap

Used to protect the transformer against external influences, for stamping and for improved process-
ing on assembly machines

Material:

see coil former, color code white          

Coil former

Plastic cover cap

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Terminals

1

1.62

12.8

272

4

B66301B1004T001

6

B66301B1006T001

2

0.9

12.8

490

6

B66301B1006T002

Plastic cover cap

B66301C2000X000

B66301

Accessories

E 6.3

epcos-ferrites-and-accessories-html.html
background image

407

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61246

For miniature transformers, e.g. DC/DC

converters for surface mounting 

Available with SMD coil former

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 3.1 mm

–1

l

e

= 15.5 mm

A

e

= 5 mm

2

A

min

= 3.6 mm

2

V

e

= 78 mm

3

Approx. weight

 0.50 g/set

Ungapped   

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N30

1000 +30/–20%

2460

B66302G0000X130

T38

2100 +40/–30%

5170

B66302G0000X138

N87

550 +30/–20%

1350

< 0.035 (200 mT, 100 kHz, 100 °C) B66302G0000X187

B66302

Core

E 8.8

epcos-ferrites-and-accessories-html.html
background image

408

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

SMD coil former with gullwing terminals

Material:

GFR liquid crystal polymer (UL 94 V-0, insulation class to IEC 60085:

F

 max. operating temperature 155 °C), color code black

Vectra E 130i 

>

E106764 (M)

@

, POLYPLASTICS CO LTD

Vectra E 130i 

>

E83005 (M)

@

, TICONA

Solderability: to IEC 60068-2-58, test Td, method 6 (Group 3): 245 °C, 3 s
Resistance to soldering heat: to IEC 60068-2-58, test Td, method 6 (Group 3): 255 °C, 10 s

permissible soldering temperature for wire-wrap connection on coil former: 400 °C, 1 s

Winding:

see 

“Processing notes”

, page 179

Plastic cover cap

Used to protect the transformer against external influences, for stamping and for improved process-
ing on assembly machines

Material:

GFR polyamide (UL 94 V-0,  insulation class to IEC 60085:

F

 max. operating temperature 155 °C), color code white

Stanyl TW250F6 

>

E47960 (M)

@

, DSM ENGINEERING PLASTICS B V

Coil former

Plastic cover cap

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Terminals

Ordering code

1

2.7

14.9

190

8

B66302D1008T001

2

1.7

14.9

302

8

B66302D1008T002

Plastic cover cap

B66302A2000X000

B66302

Accessories

E 8.8

epcos-ferrites-and-accessories-html.html
background image

409

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Compact E core with large winding area

Suitable for the design of compact battery chargers

Gapped cores available for flyback converters

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 2.41 mm

–1

l

e

= 26.3 mm

A

e

= 10.9 mm

2

A

min

= 10.4 mm

2

V

e

= 287 mm

3

Approx. weight

 1.4 g/set

Ungapped   

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

750 

r

25%

1430

< 0.41 (200 mT, 100 kHz, 100 °C)

B66322G0000X127

N87

800 

r

25%

1530

< 0.15 (200 mT, 100 kHz, 100 °C)

B66322G0000X187

B66322

Core

E 10/5.5/5

epcos-ferrites-and-accessories-html.html
background image

410

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61246

For miniature transformers

Available with SMD coil former

E cores with high permeability for common-mode

chokes and broadband applications

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 2.39 mm

–1

l

e

= 29.6 mm

A

e

= 12.4 mm

2

A

min

= 12.2 mm

2

V

e

= 367 mm

3

Approx. weight

 2 g/set

Ungapped

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.03 mm < s < 1.00 mm

K3, K4: 30 nH < A

L

 < 260 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N30

1000 +30/–20%

1900

B66305G0000X130

T46

3600 

r

30%

6839

B66305F0000X146

N27

800 +30/–20%

1510

< 0.40 (200 mT, 100 kHz, 100 °C)

B66305G0000X127

N87

850 +30/–20%

1620

< 0.20 (200 mT, 100 kHz, 100 °C)

B66305G0000X187

Material

g

mm

A

L

 value approx.

nH

P

e

Ordering code

N27

0.04

r

0.01

250

454

B66305G0040X127

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

28.4

–0.676

36.5

–0.847

33.2

–0.865

N87

28.4

–0.676

37.5

–0.796

32.1

–0.873

B66305

Core

E 13/7/4 (EF 12.6)

epcos-ferrites-and-accessories-html.html
background image

411

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former (magnetic axis horizontal or vertical)

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F

max. operating temperature 155 °C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, SABIC INNOVATIVE  PLASTICS

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 178

Squared pins.

Yoke

Material:

Stainless spring steel (0.2 mm)         

Horizontal version

Coil former

Ordering code

Version

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

Horizontal

1

11.6

27.2

80.6

8

B66202B1108T001

Vertical

1

11.6

27.2

80.6

6

B66202B1106T001

Yoke (ordering code per piece, 2 are required)

B66202A2010X000

B66202

Accessories

E 13/7/4 (EF 12.6)

epcos-ferrites-and-accessories-html.html
background image

412

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Vertical version

Yoke         

Hole arrangement

View in mounting direction

B66202

Accessories

E 13/7/4 (EF 12.6)

epcos-ferrites-and-accessories-html.html
background image

413

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

SMD coil former with gullwing terminals

Material:

GFR liquid crystal polymer (UL 94 V-0, insulation class to IEC 60085:

F

 max. operating temperature 155 °C), color code black

Vectra E 130i 

>

E106764 (M)

@

, POLYPLASTICS CO LTD

Vectra E 130i 

>

E83005 (M)

@

, TICONA

Solderability: to IEC 60068-2-58, test Td, method 6 (Group 3): 245 °C, 3 s
Resistance to soldering heat: to IEC 60068-2-58, test Td, method 6 (Group 3): 255 °C, 10 s

permissible soldering temperature for wire-wrap connection on coil former: 400 °C, 1 s

Winding:

see 

“Processing notes”

, page 179

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Terminals

Ordering code

1

13.0

27

71

10

B66306C1010T001

2

10.2

27

91

10

B66306C1010T002

Recommended
PCB layout

B66306

Accessories

E 13/7/4 (EF 12.6)

epcos-ferrites-and-accessories-html.html
background image

414

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Cover plate

Material:

GFR liquid crystal polymer (UL 94 V-0, insulation class to IEC 60085:

F

 max. operating temperature 155 °C), color code black

Sumika Super E4008

®

>

E54705 (M)

@

, SUMITOMO CHEMICAL CO LTD

For stamping and for improved processing on assembly machines

See under SMD coil former for material and resistance to soldering heat

Ordering code

Cover plate

B66414A7000X000

B66414

Accessories

E 13/7/4 (EF 12.6)

epcos-ferrites-and-accessories-html.html
background image

415

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 2.19 mm

–1

l

e

= 33.9 mm

A

e

= 15.5 mm

2

A

min

= 13.1 mm

2

V

e

= 525 mm

3

Approx. weight

 2.8 g/set

Ungapped

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.03 mm < s < 1.00 mm

K3, K4: 30 nH < A

L

 < 260 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N30

1250 +30/–20%

2170

B66219G0000X130

N27

860 +30/–20%

1490

< 0.11 (200 mT, 25 kHz, 100 °C)

B66219G0000X127

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

36.8

–0.712

44.6

–0.847

40.8

–0.865

B66219

Core

E 14/8/4

epcos-ferrites-and-accessories-html.html
background image

416

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Shortened leg compared with E 16/8/5

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 1.49 mm

–1

l

e

= 28.6 mm

A

e

= 19.2 mm

2

A

min

= 17.6 mm

2

V

e

= 549 mm

3

Approx. weight

 3 g/set

Ungapped

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.05 mm < s <1.50 mm

K3, K4: 40 nH < A

L

 <430 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

1100 +30/–20%

1300

< 0.10 (200 mT,  25 kHz, 100 °C)

B66393G0000X127

N87

1200 

r

25%

1420

< 0.30 (200 mT, 100 kHz, 100 °C)

B66393G0000X187

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

42.0

–0.764

56.7

–0.847

51.7

–0.865

B66393

Core

E 16/6/5

epcos-ferrites-and-accessories-html.html
background image

417

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61246

E cores with high permeability

for common-mode chokes and

broadband applications

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 1.87 mm

–1

l

e

= 37.6 mm

A

e

= 20.1 mm

2

A

min

= 19.4 mm

2

V

e

= 756 mm

3

Approx. weight

 3.6 g/set

Ungapped

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Material

A

L

-Wert

nH

P

e

P

V

W/set

Ordering code

N30

1400 +30/–20%

2080

B66307G0000X130

T46

5100 

r

30%

7590

B66307F0000X146

N27

950 +30/–20%

1410

< 0.14 (200 mT,  25 kHz, 100 °C)

B66307G0000X127

N87

1000 +30/–20%

1490

< 0.38 (200 mT, 100 kHz, 100 °C)

B66307G0000X187

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

** = 27 (N27)

**

 = 87 (N87)

N27,

0.06

r

0.01

303

450

B66307G0060X1**

N87

0.10

r

0.02

212

315

B66307G0100X1**

0.50

r

0.05

69

102

B66307G0500X1**

B66307

Core

E 16/8/5 (EF 16)

epcos-ferrites-and-accessories-html.html
background image

418

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.05 mm < s < 1.50 mm

K3, K4: 30 nH < A

L

 < 330 nH

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

42.2

–0.701

57.0

–0.847

52.1

–0.865

N87

42.2

–0.701

57.8

–0.796

50.4

–0.873

B66307

Core

E 16/8/5 (EF 16)

epcos-ferrites-and-accessories-html.html
background image

419

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former (magnetic axis horizontal or vertical)

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F

max. operating temperature 155 °C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 178

Squared pins.

Yoke

Material:

Stainless spring steel (0.2 mm)

Horizontal version

Coil former

Ordering code

Version

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

Horizontal

1

22.3

34

52.4

8

B66308B1108T001

Vertical

1

22.3

34

52.4

8

B66308W1108T001

Yoke (ordering code per piece, 2 are required)

B66308A2010X000

Hole arrangement

View in mounting direction

B66308

Accessories

E 16/8/5 (EF 16)

epcos-ferrites-and-accessories-html.html
background image

420

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Vertical version

Yoke

Hole arrangement

View in mounting direction

B66308

Accessories

E 16/8/5 (EF 16)

epcos-ferrites-and-accessories-html.html
background image

421

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Size based on US lam. size E cores

US designation E 187

E cores with high permeability

for common-mode chokes and

broadband applications

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 1.76 mm

–1

l

e

= 39.6 mm

A

e

= 22.5 mm

2

A

min

= 22.1 mm

2

V

e

= 891 mm

3

Approx. weight

 4.4 g/set

Ungapped

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 2.00 mm

K3, K4: 40 nH < A

L

 < 350 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N30

1700 +30/–20%

2380

B66379G0000X130

T46

5800 

r

30%

8120

B66379F0000X146

N27

1050 +30/–20%

1470

< 0.18 (200 mT,  25 kHz, 100 °C)

B66379G0000X127

N87

1150 +30/–20%

1610

< 0.50 (200 mT, 100 kHz, 100 °C)

B66379G0000X187

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

46.4

–0.697

63.3

–0.847

57.9

–0.865

N87

46.4

–0.697

64.1

–0.796

56.1

–0.873

B66379

Core

E 19/8/5

epcos-ferrites-and-accessories-html.html
background image

422

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61246

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 1.44 mm

–1

l

e

= 46.3 mm

A

e

= 32.1 mm

2

A

min

= 31.9 mm

2

V

e

= 1490 mm

3

Approx. weight

 7.3 g/set

Ungapped

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.05 mm < s < 1.50 mm

K3, K4: 50 nH < A

L

 < 430 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N30

2150 +30/–20%

2460

B66311G0000X130

N27

1300 +30/–20%

1490

< 0.27 (200 mT,  25 kHz, 100 °C)

B66311G0000X127

N87

1470 +30/–20%

1680

< 0.75 (200 mT, 100 kHz, 100 °C)

B66311G0000X187

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

** = 27 (N27)

**

 = 87 (N87)

N27,

0.09

r

0.01

363

415

B66311G0090X1**

N87

0.17

r

0.02

227

259

B66311G0170X1**

0.25

r

0.02

171

195

B66311G0250X1**

0.50

r

0.05

103

118

B66311G0500X1**

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

61.6

–0.737

88.1

–0.847

80.9

–0.865

N87

61.6

–0.737

88.5

–0.796

78.4

–0.873

B66311

Core

E 20/10/6 (EF 20)

epcos-ferrites-and-accessories-html.html
background image

423

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former (magnetic axis horizontal or vertical)

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F

max. operating temperature 155 °C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 178

Squared pins. For matching yoke see next page.

Horizontal version

Vertical version

Version

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

Ordering code

Horizontal

1

34

41.2

42

10

B66206B1110T001

Vertical

1

34

41.2

42

10

B66206W1110T001

Hole arrangement

View in mounting

direction

Hole arrangement

View in mounting

direction

B66206

Accessories

E 20/10/6 (EF 20)

epcos-ferrites-and-accessories-html.html
background image

424

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former (with right-angle pins)

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F

max. operating temperature 155 °C), color code black

Pocan B4235

®

>

E245249 (M)

@

, LANXESS AG

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 178

Squared pins.

Yoke

Material:

Stainless spring steel (0.2 mm)

Figure 1, coil former (12 pins)

Coil former

Ordering code

Figure

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

1

1

34

41.2

42

12

B66206C1012T001

2

1

34

41.2

42

14

B66206C1014T001

3

Yoke (ordering code per piece, 2 are required)

B66206A2010X000

B66206

Accessories

E 20/10/6 (EF 20)

epcos-ferrites-and-accessories-html.html
background image

425

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Figure 2, coil former (14 pins)

Figure 3, Yoke

B66206

Accessories

E 20/10/6 (EF 20)

epcos-ferrites-and-accessories-html.html
background image

426

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former for luminaires

Also to be used without clamps

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

H

max. operating temperature 180 °C), color code black

Rynite FR 530

®

>

E41938 (M)

@

, E I DUPONT DE NEMOURS & CO INC

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 178

Squared pins.

Yoke

Material:

Nickel silver (0.3 mm)

Coil former

Yoke

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

Ordering code

1

32.7

42.3

44.5

6

B66206J1106T001

2

30.7

42.3

34.4

6

B66206K1106T002

Yoke

B66206A2001X000

*

Omitted for one-section version. 

Hole arrangement

View in mounting direction

B66206

Accessories

E 20/10/6 (EF 20)

epcos-ferrites-and-accessories-html.html
background image

427

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 2.01 mm

–1

l

e

= 43.4 mm

A

e

= 21.6 mm

2

A

min

= 20.2 mm

2

V

e

= 937 mm

3

Approx. weight

 4.8 g/set

Ungapped

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.05 mm < s < 1.50 mm

K3, K4: 30 nH < A

L

 < 310 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N30

1500 +30/–20%

2390

B66314G0000X130

N27

900 +30/–20%

1440

< 0.18 (200 mT, 25 kHz, 100 °C)

B66314G0000X127

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

47.4

–0.682

59.9

–0.847

54.9

–0.865

B66314

Core

E 21/9/5

epcos-ferrites-and-accessories-html.html
background image

428

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61246

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 1.1 mm

–1

l

e

= 57.5 mm

A

e

= 52.5 mm

2

A

min

= 51.5 mm

2

V

e

= 3020 mm

3

Approx. weight

 16 g/set

Ungapped

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension 

g

 > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 2.00 mm

K3, K4: 60 nH < A

L

 < 570 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N30

2900 +30/–20%

2530

B66317G0000X130

N27

1750 +30/–20%

1520

< 0.59 (200 mT,  25 kHz, 100 °C)

B66317G0000X127

N87

1850 +30/–20%

1620

< 1.60 (200 mT, 100 kHz, 100 °C)

B66317G0000X187

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

** = 27 (N27)

**

 = 87 (N87)

N27,

0.10

r

0.02

489

425

B66317G0100X1**

N87

0.16

r

0.02

347

302

B66317G0160X1**

0.25

r

0.02

250

218

B66317G0250X1**

0.50

r

0.05

151

131

B66317G0500X1**

1.00

r

0.05

91

79

B66317G1000X1**

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

90

–0.731

139

–0.847

129

–0.865

N87

90

–0.731

139

–0.796

125

–0.873

B66317

Core

E 25/13/7 (EF 25)

epcos-ferrites-and-accessories-html.html
background image

429

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former (magnetic axis horizontal or vertical)

Material:

GFR polyterephthalate, UL 94 V-0, insulation class to IEC 60085:

B66208A, X: F

max. operating temperature 155 °C, color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

B66208-W: H

max. operating temperature 180 °C, color code black

Rynite FR 530

®

>

E41938 (M)

@

, E I DUPONT DE NEMOURS & CO INC

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 178

Squared pins.

Yoke

Material: Stainless spring steel (0.25 mm)

Horizontal version (B66208B)

Coil former

Ordering code

Version

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

Horizontal

1

61

50

28

10

B66208B1110T001

Vertical

1

61

50

28

10

B66208X1110T001

B66208W1010T001

Yoke (ordering code per piece, 2 are required)

B66208A2010X000

B66208

Accessories

E 25/13/7 (EF 25)

epcos-ferrites-and-accessories-html.html
background image

430

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Vertical version (B66208X, B66208W)

Yoke

B66208

Accessories

E 25/13/7 (EF 25)

epcos-ferrites-and-accessories-html.html
background image

431

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former for SMPS transformers with line isolation

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

H

max. operating temperature 180 °C), color code black

Rynite FR 530

®

>

E41938 (M)

@

, E I DUPONT DE NEMOURS & CO INC

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 178

Squared pins.

Yoke

Material: Nickel silver (0.3 mm) with ground terminal

Coil former

Yoke

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

1

56.9

69.2

41.8

9

B66208K1009T001

Yoke (ordering code per piece)

B66208A2003X000

B66208

Accessories

E 25/13/7 (EF 25)

epcos-ferrites-and-accessories-html.html
background image

432

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Size based on US lam. size E cores

US designation E2425

E cores with high permeability for common-mode

chokes and broadband applications

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 1.27 mm

–1

l

e

= 49.2 mm

A

e

= 38.8 mm

2

A

min

= 38.4 mm

2

V

e

= 1910 mm

3

Approx. weight

 9.6 g/set

Ungapped

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension 

g

 > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 2.00 mm

K3, K4: 50 nH < A

L

 < 500 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N30

2700 +30/–20%

2720

B66315G0000X130

T46

8500 

r

30%

8570

B66315F0000X146

N27

1500 +30/–20%

1510

< 0.36 (200 mT,  25 kHz, 100 °C)

B66315G0000X127

N87

1670 +30/–20%

1690

< 1.00 (200 mT, 100 kHz, 100 °C)

B66315G0000X187

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

N27

0.50

r

0.05

122

123

B66315G0500X127

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

75

–0.707

106

–0.847

97

–0.865

N87

75

–0.707

106

–0.796

94

–0.873

B66315

Core

E 25.4/10/7

epcos-ferrites-and-accessories-html.html
background image

433

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 1.12 mm

–1

l

e

= 67 mm

A

e

= 60 mm

2

A

min

= 49 mm

2

V

e

= 4000 mm

3

Approx. weight

 22 g/set

Ungapped

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 2.00 mm

K3, K4: 560 nH < A

L

 < 60 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N30

3100 +30/–20%

2760

B66319G0000X130

N27

1700 +30/–20%

1510

< 0.81 (200 mT,  25 kHz, 100 °C)

B66319G0000X127

N87

1900 +30/–20%

1690

< 2.20 (200 mT, 100 kHz, 100 °C)

B66319G0000X187

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

** = 27 (N27)

**

 = 87 (N87)

N27,

0.10

r

0.02

460

410

B66319G0100X1**

N87

0.18

r

0.02

300

265

B66319G0180X1**

0.34

r

0.02

195

175

B66319G0340X1**

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

90

–0.708

156

–0.847

144

–0.865

N87

90

–0.708

154

–0.796

140

–0.873

B66319

Core

E 30/15/7

epcos-ferrites-and-accessories-html.html
background image

434

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former (magnetic axis horizontal or vertical)

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F

max. operating temperature 155 °C), color code black

B66232A, B: Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

B66232J: Pocan B4235

®

>

E245249 (M)

@

, LANXESS AG

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 178

Squared pins.

Yoke

Material: Stainless spring steel (0.4 mm)

Horizontal version         

Coil former

Ordering code

Version

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

Horizontal

1

90

56

21

14

B66232B1114T001

Vertical

1

90

56

21

12

B66232J1112T001

Yoke (ordering code per piece, 2 are required)

B66232A2010X000

B66232

Accessories

E 30/15/7

epcos-ferrites-and-accessories-html.html
background image

435

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Vertical version

Yoke

B66232

Accessories

E 30/15/7

epcos-ferrites-and-accessories-html.html
background image

436

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61246

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.89 mm

–1

l

e

= 74 mm

A

e

= 83 mm

2

A

min

= 81.4 mm

2

V

e

= 6140 mm

3

Approx. weight

 30 g/set

Ungapped

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 2.50 mm

K3, K4: 70 nH < A

L

 < 710 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N30

3800 +30/–20%

2690

B66229G0000X130

N27

2100 +30/–20%

1480

< 1.10 (200 mT,  25 kHz, 100 °C)

B66229G0000X127

N87

2300 +30/–20%

1630

< 3.00 (200 mT, 100 kHz, 100 °C)

B66229G0000X187

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

** = 27 (N27)

**

 = 87 (N87)

N27,

0.50

r

0.05

244

172

B66229G0500X1**

N87

1.00

r

0.05

145

103

B66229G1000X1**

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

145

–0.748

212

–0.847

196

–0.865

N87

145

–0.748

208

–0.796

191

–0.873

B66229

Core

E 32/16/9 (EF 32)

epcos-ferrites-and-accessories-html.html
background image

437

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F

max. operating temperature 155 °C), color code black

Rynite FR 530

®

>

E41938 (M)

@

, E I DUPONT DE NEMOURS & CO INC

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 178

Squared pins.

Yoke

Material:

Stainless spring steel (0.4 mm)

Coil former

Yoke

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

1

108.50

64.4

20.42

14

B66230A1114T001

Yoke (ordering code per piece, 2 are required)

B66230A2010X000

B66230

Accessories

E 32/16/9 (EF 32)

epcos-ferrites-and-accessories-html.html
background image

438

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.76 mm

–1

l

e

= 74 mm

A

e

= 97 mm

2

A

min

= 95 mm

2

V

e

= 7187 mm

3

Approx. weight

 37 g/set

Ungapped

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 2.50 mm

K3, K4: 90 nH < A

L

 < 800 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N87

2900 +30/–20%

1750

< 3.70 (200 mT, 100 kHz, 100 °C)

B66233G0000X187

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

165

–0.711

243

–0.796

223

–0.873

B66233

Core

E 32/16/11

epcos-ferrites-and-accessories-html.html
background image

439

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Size based on US lam. size E cores

US designation E375

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.82 mm

–1

l

e

= 69.6 mm

A

e

= 84.8 mm

2

A

min

= 83.2 mm

2

V

e

= 5900 mm

3

Approx. weight

 30 g/set

Ungapped

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 2.50 mm

K3, K4: 80 nH < A

L

 < 770 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

2300 +30/–20%

1498

< 1.10 (200 mT,  25 kHz, 100 °C)

B66370G0000X127

N87

2450 +30/–20%

1600

< 3.00 (200 mT, 100 kHz, 100 °C)

B66370G0000X187

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

146

–0.719

219

–0.847

202

–0.865

B66370

Core

E 34/14/9

epcos-ferrites-and-accessories-html.html
background image

440

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.68 mm

–1

l

e

= 81 mm

A

e

= 120 mm

2

A

min

= 112 mm

2

V

e

= 9720 mm

3

Approx. weight

 50 g/set

Ungapped

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 2.50 mm

K3, K4: 100 nH < A

L

 < 930 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

2900 +30/–20%

1550

< 1.85 (200 mT,  25 kHz, 100 °C)

B66389G0000X127

N87

3100 +30/–20%

1680

< 5.00 (200 mT, 100 kHz, 100 °C)

B66389G0000X187

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

N27

1.00

r

0.05

183

96

B66389G1000X127

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

182

–0.749

302

–0.847

280

–0.865

N87

182

–0.749

295

–0.796

273

–0.873

B66389

Core

E 36/18/11

epcos-ferrites-and-accessories-html.html
background image

441

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F

max. operating temperature 155 °C), color code black

Pocan B4235

®

>

E245249 (M)

@

, LANXESS AG

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 178

Squared pins.

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

Ordering code

1

122.55

76.4

21.45

16

B66390A1016T001

Hole arrangement

View in

mounting direction

B66390

Accessories

E 36/18/11

epcos-ferrites-and-accessories-html.html
background image

442

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Size based on US lam. size E cores

US designation E 21

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.52 mm

–1

l

e

= 77 mm

A

e

= 149 mm

2

A

min

= 143 mm

2

V

e

= 11500 mm

3

Approx. weight

 58 g/set

Ungapped

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 2.50 mm

K3, K4: 130 nH < A

L

 < 1200 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

3800 +30/–20%

1560

< 2.15 (200 mT,  25 kHz, 100 °C)

B66381G0000X127

N87

4150 +30/–20%

1710

< 5.80 (200 mT, 100 kHz, 100 °C)

B66381G0000X187

N72

4600 +30/–20%

1900

< 1.12 (200 mT,  25 kHz, 100 °C)

B66381G0000X172

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

N27

0.50

r

0.05

411

166

B66381G0500X127

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

239

–0.782

378

–0.847

351

–0.865

B66381

Core

E 40/16/12

epcos-ferrites-and-accessories-html.html
background image

443

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61246

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.54 mm

–1

l

e

= 97 mm

A

e

= 178 mm

2

A

min

= 175 mm

2

V

e

= 17300 mm

3

Approx. weight

 88 g/set

Ungapped

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

    

Validity range:

K1, K2: 0.10 mm < s < 2.50 mm

K3, K4: 1210 nH < A

L

 < 130 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

3500 +30/–20%

1510

< 3.30 (200 mT,  25 kHz, 100 °C)

B66325G0000X127

N87

3950 +30/–20%

1690

< 9.00 (200 mT, 100 kHz, 100 °C)

B66325G0000X187

N95

5100 +30/–20%

2292

< 9.60 (200 mT, 100 kHz,  25 °C)
< 8.70 (200 mT, 100 kHz, 100 °C)

B66325G0000X195

N30

7500 +30/–20%

3252

B66325G0000X130

N97

4100 +30/–20%

1778

< 9.00 (200 mT, 100 kHz, 100 °C)

B66325G0000X197

Material

g

mm

A

L

 value approx.

nH

P

e

Ordering code

N27

0.10

r

0.02

1497

647

B66325G0100X127

0.25

r

0.02

759

328

B66325G0250X127

0.50

r

0.05

454

196

B66325G0500X127

0.64

r

0.05

378

164

B66325G0640X127

1.00

r

0.05

272

118

B66325G1000X127

1.50

r

0.05

201

87

B66325G1500X127

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

272

–0.741

436

–0.847

406

–0.865

N87

272

–0.741

423

–0.796

396

–0.873

B66325

Core

E 42/21/15

epcos-ferrites-and-accessories-html.html
background image

444

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61246

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.41 mm

–1

l

e

= 97 mm

A

e

= 234 mm

2

A

min

= 229 mm

2

V

e

= 22700 mm

3

Approx. weight

 116 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 3.00 mm

K3, K4: 160 nH < A

L

 < 1500 nH

Mate-

rial

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

N27

4750 +30/–20%

1560 320

< 4.4 (200 mT,  25 kHz, 100 °C)

B66329G0000X127

N87

5200 +30/–20%

1690 320

< 12.0 (200 mT, 100 kHz, 100 °C)

B66329G0000X187

N95

6700 +30/–20%

2292 320

< 12.60 (200 mT, 100 kHz,  25 °C)
< 11.50 (200 mT, 100 kHz, 100 °C)

B66329G0000X195

N97

5400 +30/–20%

1781 320

< 10.2 (200 mT, 100 kHz, 100 °C)

B66329G0000X197

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

N27

0.25

r

0.02

1029

338

B66329G0250X127

0.50

r

0.05

603

198

B66329G0500X127

1.00

r

0.05

354

116

B66329G1000X127

1.50

r

0.05

259

85

B66329G1500X127

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

354

–0.770

574

–0.847

534

–0.865

N87

354

–0.770

555

–0.796

521

–0.873

B66329

Core

E 42/21/20

epcos-ferrites-and-accessories-html.html
background image

445

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F

max. operating temperature 155 °C), color code black

Valox 420-SE0

®

>

E121562 (M)

@

, SABIC INNOVATIVE  PLASTICS

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 178

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

Ordering code

1

172

100

20

18

B66243B1018T001

B66243

Accessories

E 42/21/20

epcos-ferrites-and-accessories-html.html
background image

446

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

Polyterephthalate GV (UL 94 V-0, insulation class to IEC 60085:

H

max. operating temperature 180 °C), color code black

Rynite FR 530

®

>

E41938 (M)

@

, E I DUPONT DE NEMOURS & CO INC

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 178

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

Ordering code

1

187

133

24.4

12

B66243S1012T001

B66243

Accessories

E 42/21/20

epcos-ferrites-and-accessories-html.html
background image

447

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Size based on US lam. size E cores

US designation E 625

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.38 mm

–1

l

e

= 89 mm

A

e

= 233 mm

2

A

min

= 226 mm

2

V

e

= 20700 mm

3

Approx. weight

 106 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

    

Validity range:

K1, K2: 0.10 mm < s < 3.00 mm

K3, K4: 170 nH < A

L

 < 1640 nH

Mate-
rial

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

N27

5100 +30/–20%

1550 320

< 3.95 (200 mT,  25 kHz, 100 °C) B66383G0000X127

N87

5600 +30/–20%

1690 320

< 11.10 (200 mT, 100 kHz, 100 °C) B66383G0000X187

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

364

–0.773

579

–0.847

538

–0.865

N87

364

–0.773

562

–0.796

524

–0.873

B66383

Core

E 47/20/16

epcos-ferrites-and-accessories-html.html
background image

448

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61246

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.35 mm

–1

l

e

= 124 mm

A

e

= 354 mm

2

A

min

= 351 mm

2

V

e

= 43900 mm

3

Approx. weight

 215 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.15 mm < s < 3.50 mm

K3, K4: 180 nH < A

L

 < 1799 nH

Mate-
rial

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

N27

5800 +30/–20%

1610 320

< 8.00 (200 mT,  25 kHz, 100 °C)

B66335G0000X127

N87

6400 +30/–20%

1780 320

< 3.80 (100 mT, 100 kHz, 100 °C)

B66335G0000X187

N97

6700 +30/–20%

1868 320

< 3.34 (100 mT, 100 kHz, 100 °C)

B66335G0000X197

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

** = 27 (N27)

**

 = 87 (N87)

N27,

0.50

r

0.05

843

234

B66335G0500X1**

N87

1.00

r

0.05

496

138

B66335G1000X1**

1.50

r

0.05

364

101

B66335G1500X1**

2.00

r

0.05

292

81

B66335G2000X1**

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

496

–0.764

836

–0.847

781

–0.865

N87

496

–0.764

800

–0.796

765

–0.873

B66335

Core

E 55/28/21

epcos-ferrites-and-accessories-html.html
background image

449

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.3 mm

–1

l

e

= 124 mm

A

e

= 420 mm

2

A

min

= 420 mm

2

V

e

= 52100 mm

3

Approx. weight

 256 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.15 mm < s < 3.50 mm

K3, K4: 220 nH < A

L

 < 2130 nH

Mate-
rial

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

N27

6800 +30/–20%

1600 310

< 9.50 (200 mT,  25 kHz, 100 °C)

B66344G0000X127

N87

7300 +30/–20%

1740 310

< 4.80 (100 mT, 100 kHz, 100 °C)

B66344G0000X187

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

N27

2.50

r

0.05

295

70

B66344G2500X127

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

596

–0.769

992

–0.847

927

–0.865

N87

596

–0.769

950

–0.796

905

–0.873

B66344

Core

E 55/28/25

epcos-ferrites-and-accessories-html.html
background image

450

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Size based on US lam. size E cores

US designation E 75

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.31 mm

–1

l

e

= 107 mm

A

e

= 340 mm

2

A

min

= 327 mm

2

V

e

= 36400 mm

3

Approx. weight

 184 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 3.00 mm

K3, K4: 200 nH < A

L

 < 2000 nH

Mate-
rial

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

N27

6300 +30/–20%

1570 320

< 6.8 (200 mT,  25 kHz, 100 °C)

B66385G0000X127

N87

6900 +30/–20%

1730 320

< 3.2 (100 mT, 100 kHz, 100 °C)

B66385G0000X187

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

500

–0.784

821

–0.847

765

–0.865

B66385

Core

E 56/24/19

epcos-ferrites-and-accessories-html.html
background image

451

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.27 mm

–1

l

e

= 147 mm

A

e

= 535 mm

2

A

min

= 529 mm

2

V

e

= 78650 mm

3

Approx. weight

 394 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.20 mm < s < 5.00 mm

K3, K4: 230 nH < A

L

 < 2290 nH

Mate-
rial

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

N27

7200 +30/–20%

1570 320

< 14.6 (200 mT,  25 kHz, 100 °C)

B66387G0000X127

N87

7900 +30/–20%

1700 320

< 6.7 (100 mT, 100 kHz, 100 °C)

B66387G0000X187

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

** = 27 (N27)

**

 = 87 (N87)

N27,

0.50

r

0.05

1214

265

B66387G0500X1**

N87

1.00

r

0.05

716

156

B66387G1000X1**

1.50

r

0.05

526

115

B66387G1500X1**

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

716

–0.762

1231

–0.847

1154

–0.865

N87

716

–0.762

1168

–0.796

1131

–0.873

B66387

Core

E 65/32/27

epcos-ferrites-and-accessories-html.html
background image

452

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

Polyphenylene suplhide (UL 94 V-0, insulation class to IEC 60085:

F

max. operating temperature 155 °C), color code natur

Ryton R-4, 

>

E54700 (M)

@

, CHEVRON PHILLIPS CHEMICAL CO L P

Winding:

see 

“Processing notes”

, page 178

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

Ordering code

1

435

246

19.5

B66388A2000T001

B66388

Accessories

E 65/32/27

epcos-ferrites-and-accessories-html.html
background image

453

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.22 mm

–1

l

e

= 149 mm

A

e

= 683 mm

2

A

min

= 676 mm

2

V

e

= 102000 mm

3

Approx. weight

 514 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.20 mm < s < 5.00 mm

K3, K4: 290 nH < A

L

 < 2880 nH

Mate-
rial

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

N27

8850 +30/–20%

1530 320

< 19.00 (200 mT,  25 kHz, 100 °C) B66371G0000X127

N87

9700 +30/–20%

1700 320

< 9.50 (100 mT, 100 kHz, 100 °C) B66371G0000X187

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

N27

1.50

r

0.05

655

113

B66371G1500X127

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

903

–0.789

1568

–0.847

1470

–0.865

N87

903

–0.789

1485

–0.796

1438

–0.873

B66371

Core

E 70/33/32

epcos-ferrites-and-accessories-html.html
background image

454

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

B66372A: Polyphenylene suplhide, UL 94 V-0, insulation class to IEC 60085:

F

max. operating temperature 155 °C), color code natur

Ryton R-4, 

>

E54700 (M)

@

, CHEVRON PHILLIPS CHEMICAL CO L P

B66372A: GFR ASA/ PBT, UL 94 HB, insulation class to IEC 60085:

H

max. operating temperature 130 °C), color code black

Ultradur 4090G6 [E41871 (M)], BASF SE

Winding:

see 

“Processing notes”

, page 178

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

Ordering code

1

389

230.5

20

B66372A2000T001

B66372B2000T001

B66372

Accessories

E 70/33/32

epcos-ferrites-and-accessories-html.html
background image

455

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.47 mm

–1

l

e

= 184 mm

A

e

= 390 mm

2

A

min

= 388 mm

2

V

e

= 71800 mm

3

Approx. weight

 358 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.20 mm < s < 5.00 mm

K3, K4: 140 nH < A

L

 < 1330 nH

Mate-
rial

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

N27

4150 +30/–20%

1550 320

< 13.30 (200 mT,  25 kHz, 100 °C) B66375G0000X127

N87

4500 +30/–20%

1680 320

< 6.50 (100 mT, 100 kHz, 100 °C) B66375G0000X187

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

N27

0.50

r

0.05

882

329

B66375G0500X127

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

539

–0.710

867

–0.847

816

–0.865

N87

539

–0.710

804

–0.796

806

–0.873

B66375

Core

E 80/38/20

epcos-ferrites-and-accessories-html.html
background image

456

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Example of an assembly set

1

Total integration

Assembling by gluing technology (ELP without clamp recess)

2

Individual integration

Assembling by clamping technology (ELP with clamp recess)

General information

ELP cores

ELP cores

epcos-ferrites-and-accessories-html.html
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457

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EELP 14
Combination: ELP 14/3.5/5 with ELP 14/3.5/5

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 1.45 mm

–1

l

e

= 20.7 mm

A

e

= 14.3 mm

2

A

min

= 13.9 mm

2

V

e

= 296 mm

3

Approx. weight

 1.6 g/set

Ungapped

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EELP 14:

Validity range:

K1, K2: 0.05 mm < s < 1.00 mm

K3, K4: 20 nH < A

L

 < 200 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

(per piece)

N49

800 

r

25%

920

< 0.08 ( 50 mT, 500 kHz, 100 °C)

B66281G0000X149

N92

850 

r

25%

980

< 0.22 (200 mT, 100 kHz, 100 °C)

B66281G0000X192

N87

1100 

r

25%

1270

< 0.20 (200 mT, 100 kHz, 100 °C)

B66281G0000X187

N95

1300 

r

25%

1225

< 0.20 (200 mT, 100 kHz,  25 °C)
< 0.18 (200 mT, 100 kHz, 100 °C)

B66281G0000X195

N97

1150 

r

25%

1320

< 0.16 (200 mT, 100 kHz, 100 °C)

B66281G0000X197

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

29.0

–0.772

47

–0.796

39

–0.873

ELP 14/3.5/5

B66281

ELP 14/3.5/5 through ELP 64/10/50

Core (without clamp recess)

ELP 14/3.5/5

epcos-ferrites-and-accessories-html.html
background image

458

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EILP 14
Combination:
ELP 14/3.5/5 with I 14/1.5/5

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 1.15 mm

–1

l

e

= 16.7 mm

A

e

= 14.5 mm

2

A

min

= 13.9 mm

2

V

e

= 242 mm

3

Approx. weight

 1.3 g/set

Ungapped

* Plate-type tool type

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EILP 14:

Validity range:

K1, K2: 0.05 mm < s < 1.00 mm

K3, K4: 20 nH < A

L

 < 200 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

(per piece)

N49

850 

r

25%

780 < 0.06 ( 50 mT, 500 kHz, 100 °C) B66281G0000X149 (ELP core)

B66281K0000X149 (I core)*

N92

900 

r

25%

820 < 0.18 (200 mT, 100 kHz, 100 °C) B66281G0000X192 (ELP core)

B66281K0000X192 (I core)*

N87

1250 

r

25% 1140 < 0.16 (200 mT, 100 kHz, 100 °C) B66281G0000X187 (ELP core)

B66281K0000X187 (I core)*

N97

1300 

r

25% 1190 < 0.13 (200 mT, 100 kHz, 100 °C) B66281G0000X197 (ELP core)

B66281K0000X197 (I core)*

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

38.7

–0.691

49

–0.796

40

–0.873

ELP 14/3.5/5

I 14/1.5/5

B66281

Core (without clamp recess)

ELP 14/3.5/5 with I 14/1.5/5

epcos-ferrites-and-accessories-html.html
background image

459

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EELP 18
Combination: ELP 18/4/10 with ELP 18/4/10

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.62 mm

–1

l

e

= 24.3 mm

A

e

= 39.3 mm

2

A

min

= 38.9 mm

2

V

e

= 955 mm

3

Approx. weight

 4.8 g/set

Ungapped

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EELP 18:

Validity range:

K1, K2: 0.10 mm < s < 1.50 mm

K3, K4: 50 nH < A

L

 < 500 nH

Clamp

Ordering code per piece, 2 pieces required

Ordering code: B65804P2204X000

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

(per piece)

N49

1900 

r

25%

930

< 0.25 ( 50 mT, 500 kHz, 100 °C)

B66283G0000X149

N92

2050 

r

25%

1010

< 0.66 (200 mT, 100 kHz, 100 °C)

B66283G0000X192

N87

2600 

r

25%

1270

< 0.60 (200 mT, 100 kHz, 100 °C)

B66283G0000X187

N97

2670 

r

25%

1314

< 0.47 (200 mT, 100 kHz, 100 °C)

B66283G0000X197

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

71.1

–0.773

124

–0.796

104

–0.873

ELP 18/4/10

B66283, B65804

Core and accessories (with clamp recess)

ELP 18/4/10

epcos-ferrites-and-accessories-html.html
background image

460

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EILP 18
Combination:
ELP 18/4/10 with I 18/2/10

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.51 mm

–1

l

e

= 20.3 mm

A

e

= 39.5 mm

2

A

min

= 38.9 mm

2

V

e

= 802 mm

3

Approx. weight

 4.1 g/set

Ungapped

* Plate-type tool type

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

(per piece)

N49

2100 

r

25%

860 < 0.20 ( 50 mT, 500 kHz, 100 °C) B66283G0000X149 (ELP core)

B66283K0000X149 (I core)*

N92

2300 

r

25%

930 < 0.55 (200 mT, 100 kHz, 100 °C) B66283G0000X192 (ELP core)

B66283K0000X192 (I core)*

N87

2900 

r

25% 1180 <  0.50 (200 mT, 100 kHz, 100 °C) B66283G0000X187 (ELP core)

B66283K0000X187 (I core)*

N97

3000 

r

25% 1230 < 0.42 (200 mT, 100 kHz, 100 °C) B66283G0000X197 (ELP core)

B66283K0000X197 (I core)*

I 18/2/10

ELP 18/4/10

B66283

Core and accessories (with clamp recess)

ELP 18/4/10 with I 18/2/10

epcos-ferrites-and-accessories-html.html
background image

461

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EILP 18:

Validity range:

K1, K2: 0.10 mm < s < 1.50 mm

K3, K4: 50 nH < A

L

 < 500 nH

Clamp

Ordering code per piece, 2 pieces required

Ordering code: B66284F2204X000

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

77.4

–0.774

129

–0.796

107

–0.873

B66284

Core and accessories (with clamp recess)

ELP 18/4/10 with I 18/2/10

epcos-ferrites-and-accessories-html.html
background image

462

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EELP 18
Combination: ELP 18/4/10 with ELP 18/4/10

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.62 mm

–1

l

e

= 24.3 mm

A

e

= 39.3 mm

2

A

min

= 38.9 mm

2

V

e

= 955 mm

3

Approx. weight

 4.8 g/set

Ungapped

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EELP 18:

Validity range:

K1, K2: 0.10 mm < s < 1.50 mm

K3, K4: 50 nH < A

L

 < 500 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

(per piece)

N49

1900 

r

25%

930

< 0.25 ( 50 mT, 500 kHz, 100 °C)

B66453G0000X149

N92

2050 

r

25%

1010

< 0.66 (200 mT, 100 kHz, 100 °C)

B66453G0000X192

N87

2600 

r

25%

1270

< 0.60 (200 mT, 100 kHz, 100 °C)

B66453G0000X187

N97

2650 

r

25%

1300

< 0.50 (200 mT, 100 kHz, 100 °C)

B66453G0000X197

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

71.1

–0.773

124

–0.796

104

–0.873

ELP 18/4/10

B66453

Core (without clamp recess)

ELP 18/4/10

epcos-ferrites-and-accessories-html.html
background image

463

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EILP 18
Combination:
ELP 18/4/10 with I 18/2/10

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics 

(per set)

6

l

/

A = 0.51 mm

–1

l

e

= 20.3 mm

A

e

= 39.5 mm

2

A

min

= 38.9 mm

2

V

e

= 802 mm

3

Approx. weight

 4.1 g/set

Ungapped

* Plate-type tool type

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EILP 18:

Validity range:

K1, K2: 0.10 mm < s < 1.50 mm

K3, K4: 50 nH < A

L

 < 500 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

(per piece)

N49

2100 

r

25%

860 < 0.20 ( 50 mT, 500 kHz, 100 °C) B66453G0000X149 (ELP core)

B66453K0000X149 (I core)*

N92

2300 

r

25%

930 < 0.55 (200 mT, 100 kHz, 100 °C) B66453G0000X192 (ELP core)

B66453K0000X192 (I core)*

N87

2900 

r

25% 1180 < 0.50 (200 mT, 100 kHz, 100 °C) B66453G0000X187 (ELP core)

B66453K0000X187 (I core)*

N97

3000 

r

25% 1230 < 0.42 (200 mT, 100 kHz, 100 °C) B66453G0000X197 (ELP core)

B66453K0000X197 (I core)*

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

77.4

–0.774

129

–0.796

107

–0.873

ELP 18/4/10

I 18/2/10

B66453

Core (without clamp recess)

ELP 18/4/10 with I 18/2/10

epcos-ferrites-and-accessories-html.html
background image

464

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EELP 22
Combination: ELP 22/6/16 with ELP 22/6/16

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.41 mm

–1

l

e

= 32.5 mm

A

e

= 78.3 mm

2

A

min

= 77.9 mm

2

V

e

= 2540 mm

3

Approx. weight

 13 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EELP 22:

Validity range:

K1, K2: 0.10 mm < s < 1.50 mm

K3, K4: 100 nH < A

L

 < 700 nH

Material

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N49

3100 

r

25%

1010

250

< 0.65 ( 50 mT, 500 kHz, 100 °C) B66285G0000X149

N92

3400 

r

25%

1110

350

< 1.65 (200 mT, 100 kHz, 100 °C) B66285G0000X192

N87

4500 

r

25%

1470

300

< 1.50 (200 mT, 100 kHz, 100 °C) B66285G0000X187

N97

4600 

r

25%

1520

310

< 1.20 (200 mT, 100 kHz, 100 °C) B66285G0000X197

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

126

–0.814

232

–0.796

200

–0.873

ELP 22/6/16

B66285

Core (with clamp recess)

ELP 22/6/16

epcos-ferrites-and-accessories-html.html
background image

465

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EILP 22
Combination:
ELP 22/6/16 with I 22/2.5/16

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.33 mm

–1

l

e

= 26.1 mm

A

e

= 78.5 mm

2

A

min

= 77.9 mm

2

V

e

= 2050 mm

3

Approx. weight

 10.5 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

** Plate-type tool type

Mate-

rial

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N49

3700

r

25%

960 250

< 0.50 ( 50 mT, 500 kHz, 100 °C) B66285G0000X149 (ELP core)

B66285K0000X149 (I core)**

N92

4000

r

25%

1050 350

< 1.38 (200 mT, 100 kHz, 100 °C) B66285G0000X192 (ELP core)

B66285K0000X192 (I core)**

N87

5200

r

25%

1360 300

< 1.25 (200 mT, 100 kHz, 100 °C) B66285G0000X187 (ELP core)

B66285K0000X187 (I core)**

N97

5250

r

25%

1390 310

< 1.00 (200 mT, 100 kHz, 100 °C) B66285G0000X197 (ELP core)

B66285K0000X197 (I core)**

ELP 22/6/16

I 22/2.5/16

B66285

Core and accessories (with clamp recess)

ELP 22/6/16 with I 22/2.5/16

epcos-ferrites-and-accessories-html.html
background image

466

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EILP 22:

Validity range:

K1, K2: 0.10 mm < s < 1.50 mm

K3, K4: 100 nH < A

L

 < 700 nH

Clamp

Ordering code per piece, 2 pieces required

Ordering code: B65804P2204X000

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

134

–0.806

243

–0.796

206

–0.873

B65804

Core and accessories (with clamp recess)

ELP 22/6/16 with I 22/2.5/16

epcos-ferrites-and-accessories-html.html
background image

467

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EELP 22
Combination: ELP 22/6/16 with ELP 22/6/16

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.41 mm

–1

l

e

= 32.5 mm

A

e

= 78.3 mm

2

A

min

= 77.9 mm

2

V

e

= 2540 mm

3

Approx. weight

 13 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EELP 22:

Validity range:

K1, K2: 0.10 mm < s < 1.50 mm

K3, K4: 100 nH < A

L

 < 700 nH

Material

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N49

3100 

r

25%

1010

250

< 0.65 ( 50 mT, 500 kHz, 100 °C) B66455G0000X149

N92

3400 

r

25%

1110

350

< 1.65 (200 mT, 100 kHz, 100 °C) B66455G0000X192

N87

4500 

r

25%

1470

300

< 1.50 (200 mT, 100 kHz, 100 °C) B66455G0000X187

N97

4600 

r

25%

1520

310

< 1.20 (200 mT, 100 kHz, 100 °C) B66455G0000X197

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

126

–0.814

232

–0.796

200

–0.873

ELP 22/6/16

B66455

Core (without clamp recess)

ELP 22/6/16

epcos-ferrites-and-accessories-html.html
background image

468

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EILP 22
Combination:
ELP 22/6/16 with I 22/2.5/16

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics 

(per set)

6

l

/

A = 0.33 mm

–1

l

e

= 26.1 mm

A

e

= 78.5 mm

2

A

min

= 77.9 mm

2

V

e

= 2050 mm

3

Approx. weight

 10.5 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

** Plate-type tool type

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EILP 22:

Validity range:

K1, K2: 0.10 mm < s < 1.50 mm

K3, K4: 100 nH < A

L

 < 700 nH

Mate-

rial

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N49

3700

r

25%

960 250

< 0.50 ( 50 mT, 500 kHz, 100 °C) B66455G0000X149 (ELP core)

B66455K0000X149 (I core)**

N92

4000

r

25%

1050 350

< 1.38 (200 mT, 100 kHz, 100 °C) B66455G0000X192 (ELP core)

B66455K0000X192 (I core)**

N87

5200

r

25%

1360 300

< 1.25 (200 mT, 100 kHz, 100 °C) B66455G0000X187 (ELP core)

B66455K0000X187 (I core)**

N97

5250

r

25%

1390 310

< 1.00 (200 mT, 100 kHz, 100 °C) B66455G0000X197 (ELP core)

B66455K0000X197 (I core)**

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

134

–0.806

243

–0.796

206

–0.873

ELP 22/6/16

I 22/2.5/16

B66455

Core (without clamp recess)

ELP 22/6/16 with I 22/2.5/16

epcos-ferrites-and-accessories-html.html
background image

469

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EELP 32
Combination: ELP 32/6/20 with ELP 32/6/20

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.32 mm

–1

l

e

= 41.4 mm

A

e

= 130 mm

2

A

min

= 128 mm

2

V

e

= 5390 mm

3

Approx. weight

 28 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EELP 32:

Validity range:

K1, K2: 0.10 mm < s < 1.50 mm

K3, K4: 150 nH < A

L

 < 1000 nH

Clamp

Ordering code per piece, 2 pieces required

Ordering code: B65808J2204X000

Material

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N49

3900 

r

25%

990

250

< 1.40 ( 50 mT, 500 kHz, 100 °C) B66287G0000X149

N92

4300 

r

25%

1090

350

< 3.70 (200 mT, 100 kHz, 100 °C) B66287G0000X192

N87

5700 

r

25%

1450

300

< 3.40 (200 mT, 100 kHz, 100 °C) B66287G0000X187

N97

5700 

r

25%

1440

310

< 2.60 (200 mT, 100 kHz, 100 °C) B66287G0000X197

N95

6900 

r

25%

1740

310

< 3.40 (200 mT, 100 kHz,  25 °C)
< 3.10 (200 mT, 100 kHz, 100 °C)

B66287G0000X195

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

208

–0.819

367

–0.796

322

–0.873

ELP 32/6/20

B66287, B65808

Core and accessories (with clamp recess)

ELP 32/6/20

epcos-ferrites-and-accessories-html.html
background image

470

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EILP 32
Combination:
ELP 32/6/20 with I 32/3/20

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics 

(per set)

6

l

/

A = 0.27 mm

–1

l

e

= 35.1 mm

A

e

= 130 mm

2

A

min

= 128 mm

2

V

e

= 4560 mm

3

Approx. weight

 24 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

** Plate-type tool type

Mate-

rial

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N49

4400

r

25%

950 250

< 1.20 ( 50 mT, 500 kHz, 100 °C) B66287G0000X149 (ELP core)

B66287K0000X149 (I core)**

N92

4800

r

25%

1031 350

< 3.20 (200 mT, 100 kHz, 100 °C) B66287G0000X192 (ELP core)

B66287K0000X192 (I core)**

N87

6300

r

25%

1350 300

< 2.90 (200 mT, 100 kHz, 100 °C) B66287G0000X187 (ELP core)

B66287K0000X187 (I core)**

N97

6300

r

25%

1350 310

< 2.20 (200 mT, 100 kHz, 100 °C) B66287G0000X197 (ELP core)

B66287K0000X197 (I core)**

N95

7550 

r

25%

1618 310

< 2.90 (200 mT, 100 kHz,  25 °C)
< 2.60 (200 mT, 100 kHz, 100 °C)

B66287G0000X195 (ELP core)
B66287K0000X195 (I core)**

I 32/3/20

ELP 32/6/20

B66287

Core and accessories (with clamp recess)

ELP 32/6/20 with I 32/3/20

epcos-ferrites-and-accessories-html.html
background image

471

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EILP 32:

Validity range:

K1, K2: 0.10 mm < s < 1.50 mm

K3, K4: 150 nH < A

L

 < 1000 nH

Clamp

Ordering code per piece, 2 pieces required

Ordering code: B66288F2204X000

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

234

–0.777

379

–0.796

329

–0.873

 B66288

Core and accessories (with clamp recess)

ELP 32/6/20 with I 32/3/20

epcos-ferrites-and-accessories-html.html
background image

472

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EELP 32
Combination: ELP 32/6/20 with ELP 32/6/20

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.32 mm

–1

l

e

= 41.4 mm

A

e

= 130 mm

2

A

min

= 128 mm

2

V

e

= 5390 mm

3

Approx. weight

 28 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EELP 32:

Validity range:

K1, K2: 0.10 mm < s < 1.50 mm

K3, K4: 150 nH < A

L

 < 1000 nH

Material

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N49

3900 

r

25%

990

250

< 1.40 ( 50 mT, 500 kHz, 100 °C) B66457G0000X149

N92

4300 

r

25%

1090

350

< 3.70 (200 mT, 100 kHz, 100 °C) B66457G0000X192

N87

5700 

r

25%

1450

300

< 3.40 (200 mT, 100 kHz, 100 °C) B66457G0000X187

N97

5700 

r

25%

1440

310

< 2.60 (200 mT, 100 kHz, 100 °C) B66457G0000X197

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

208

–0.819

367

–0.796

322

–0.873

ELP 32/6/20

B66457

Core (without clamp recess)

ELP 32/6/20

epcos-ferrites-and-accessories-html.html
background image

473

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EILP 32
Combination:
ELP 32/6/20 with I 32/3/20

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics 

(per set)

6

l

/

A = 0.27 mm

–1

l

e

= 35.1 mm

A

e

= 130 mm

2

A

min

= 128 mm

2

V

e

= 4560 mm

3

Approx. weight 

24 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

** Plate-type tool type

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EILP 32:

Validity range:

K1, K2: 0.10 mm < s < 1.50 mm

K3, K4: 150 nH < A

L

 < 1000 nH

Mate-

rial

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N49

4400

r

25%

950 250

< 1.20 ( 50 mT, 500 kHz, 100 °C) B66457G0000X149 (ELP core)

B66457K0000X149 (I core)**

N92

4800

r

25%

1031 350

< 3.20 (200 mT, 100 kHz, 100 °C) B66457G0000X192 (ELP core)

B66457K0000X192 (I core)**

N87

6300

r

25%

1350 300

< 2.90 (200 mT, 100 kHz, 100 °C) B66457G0000X187 (ELP core)

B66457K0000X187 (I core)**

N97

6300

r

25%

1350 310

< 2.20 (200 mT, 100 kHz, 100 °C) B66457G0000X197 (ELP core)

B66457K0000X197 (I core)**

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

234

–0.777

379

–0.796

329

–0.873

ELP 32/6/20

I 32/3/20

B66457

Core (without clamp recess)

ELP 32/6/20 with I 32/3/20

epcos-ferrites-and-accessories-html.html
background image

474

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EELP 38
Combination: ELP 38/8/25 with ELP 38/8/25

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.27 mm

–1

l

e

= 52.4 mm

A

e

= 194 mm

2

A

min

= 192 mm

2

V

e

= 10200 mm

3

Approx. weight

 52 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EELP 38:

Validity range:

K1, K2: 0.10 mm < s < 2.00 mm

K3, K4: 180 nH < A

L

 < 1500 nH

Material

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N49

4850 

r

25%

1040

250

< 2.60 ( 50 mT, 500 kHz, 100 °C) B66289G0000X149

N92

5400 

r

25%

1160

350

< 6.65 (200 mT, 100 kHz, 100 °C) B66289G0000X192

N87

7200 

r

25%

1550

300

< 6.05 (200 mT, 100 kHz, 100 °C) B66289G0000X187

N97

7400 

r

25%

1590

310

< 5.15 (200 mT, 100 kHz, 100 °C) B66289G0000X197

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

302

–0.815

522

–0.796

466

–0.873

ELP 38/8/25

B66289

Core (with clamp recess)

ELP 38/8/25

epcos-ferrites-and-accessories-html.html
background image

475

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EILP 38
Combination:
ELP 38/8/25 with I 38/4/25

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics 

(per set)

6

l

/

A = 0.22 mm

–1

l

e

= 43.6 mm

A

e

= 194 mm

2

A

min

= 192 mm

2

V

e

= 8460 mm

3

Approx. weight 

44 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

** Plate-type tool type

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EILP 38:

Validity range:

K1, K2: 0.10 mm < s < 2.00 mm

K3, K4: 180 nH < A

L

 < 1500 nH

Mate-

rial

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N49

5700

r

25%

1000 250

< 2.20 ( 50 mT, 500 kHz, 100 °C) B66289G0000X149 (ELP core)

B66289K0000X149 (I core)**

N92

6200

r

25%

1110 350

< 5.30 (200 mT, 100 kHz, 100 °C) B66289G0000X192 (ELP core)

B66289K0000X192 (I core)**

N87

8300

r

25%

1450 300

< 5.15 (200 mT, 100 kHz, 100 °C) B66289G0000X187 (ELP core)

B66289K0000X187 (I core)**

N97

8400

r

25%

1500 310

< 4.40 (200 mT, 100 kHz, 100 °C) B66289G0000X197 (ELP core)

B66289K0000X197 (I core)**

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

328

–0.788

541

–0.796

477

–0.873

I 38/4/25

ELP 38/8/25

B66289

Core (with clamp recess)

ELP 38/8/25 with I 38/4/25

epcos-ferrites-and-accessories-html.html
background image

476

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EELP 38
Combination: ELP 38/8/25 with ELP 38/8/25

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.27 mm

–1

l

e

= 52.4 mm

A

e

= 194 mm

2

A

min

= 192 mm

2

V

e

= 10200 mm

3

Approx. weight

 52 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EELP 38:

Validity range:

K1, K2: 0.10 mm < s < 2.00 mm

K3, K4: 180 nH < A

L

 < 1500 nH

Material

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N49

4850 

r

25%

1040

250

< 2.60 ( 50 mT, 500 kHz, 100 °C) B66459G0000X149

N92

5400 

r

25%

1160

350

< 6.65 (200 mT, 100 kHz, 100 °C) B66459G0000X192

N87

7200 

r

25%

1550

300

< 6.05 (200 mT, 100 kHz, 100 °C) B66459G0000X187

N97

7400 

r

25%

1590

310

< 5.15 (200 mT, 100 kHz, 100 °C) B66459G0000X197

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

302

–0.815

522

–0.796

466

–0.873

ELP 38/8/25

B66459

Core (without clamp recess)

ELP 38/8/25

epcos-ferrites-and-accessories-html.html
background image

477

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EILP 38
Combination:
ELP 38/8/25 with I 38/4/25

To IEC 62317-9

Delivery mode: single units

Magnetic
characteristics 

(per set)

6

l

/

A = 0.22 mm

–1

l

e

= 43.6 mm

A

e

= 194 mm

2

A

min

= 192 mm

2

V

e

= 8440 mm

3

Approx. weight 

44 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

** Plate-type tool type

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EILP 38:

Validity range:

K1, K2: 0.10 mm < s < 2.00 mm

K3, K4: 180 nH < A

L

 < 1500 nH

Mate-

rial

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N49

5700

r

25%

1000 250

< 2.20 ( 50 mT, 500 kHz, 100 °C) B66459G0000X149 (ELP core)

B66459K0000X149 (I core)**

N92

6200

r

25%

1110 350

< 5.30 (200 mT, 100 kHz, 100 °C) B66459G0000X192 (ELP core)

B66459K0000X192 (I core)**

N87

8300

r

25%

1450 300

< 5.15 (200 mT, 100 kHz, 100 °C) B66459G0000X187 (ELP core)

B66459K0000X187 (I core)**

N97

8400

r

25%

1500 310

< 4.40 (200 mT, 100 kHz, 100 °C) B66459G0000X197 (ELP core)

B66459K0000X197 (I core)**

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

328

–0.788

541

–0.796

477

–0.873

I 38/4/25

ELP 38/8/25

B66459

Core (without clamp recess)

ELP 38/8/25 with I 38/4/25

epcos-ferrites-and-accessories-html.html
background image

478

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EELP 43
Combination: ELP 43/10/28 with ELP 43/10/28

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.274 mm

–1

l

e

= 61.6 mm

A

e

= 225 mm

2

A

min

= 217 mm

2

V

e

= 13748 mm

3

Approx. weight

 70 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EELP 43:

Validity range:

K1, K2: 0.10 mm < s < 2.00 mm

K3, K4: 200 nH < A

L

 < 2200 nH

Material

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N49

5000 

r

25%

1070

250

< 3.5 ( 50 mT, 500 kHz, 100 °C)

B66291G0000X149

N92

5500 

r

25%

1170

350

< 9.0 (200 mT, 100 kHz, 100 °C)

B66291G0000X192

N87

7300 

r

25%

1560

300

< 8.0 (200 mT, 100 kHz, 100 °C)

B66291G0000X187

N97

7500 

r

25%

1590

310

< 7.0 (200 mT, 100 kHz, 100 °C)

B66291G0000X197

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

358

–0.794

597

–0.796

540

–0.873

ELP 43/10/28

B66291

Core (with clamp recess)

ELP 43/10/28

epcos-ferrites-and-accessories-html.html
background image

479

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EILP 43
Combination:
ELP 43/10/28 with I 43/4/28

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics 

(per set)

6

l

/

A = 0.225 mm

–1

l

e

= 50.8 mm

A

e

= 225 mm

2

A

min

= 217 mm

2

V

e

= 11430 mm

3

Approx. weight 

60 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

** Plate-type tool type

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EILP 43:

Validity range:

K1, K2: 0.10 mm < s < 2.00 mm

K3, K4: 200 nH < A

L

 < 2200 nH

Mate-

rial

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N49

5900

r

25%

1030 250

< 3.0 ( 50 mT, 500 kHz, 100 °C) B66291G0000X149 (ELP core)

B66291K0000X149 (I core)**

N92

6400

r

25%

1120 350

< 7.8 (200 mT, 100 kHz, 100 °C) B66291G0000X192 (ELP core)

B66291K0000X192 (I core)**

N87

8500

r

25%

1480 300

< 7.0 (200 mT, 100 kHz, 100 °C) B66291G0000X187 (ELP core)

B66291K0000X187 (I core)**

N97

8700

r

25%

1525 310

< 6.0 (200 mT, 100 kHz, 100 °C) B66291G0000X197 (ELP core)

B66291K0000X197 (I core)**

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

390

–0.784

621

–0.796

553

–0.873

I 43/4/28

ELP 43/10/28

B66291

Core (with clamp recess)

ELP 43/10/28 with I 43/4/28

epcos-ferrites-and-accessories-html.html
background image

480

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EELP 43
Combination: ELP 43/10/28 with ELP 43/10/28

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.274 mm

–1

l

e

= 61.6 mm

A

e

= 225 mm

2

A

min

= 217 mm

2

V

e

= 13748 mm

3

Approx. weight

 70 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EELP 43:

Validity range:

K1, K2: 0.10 mm < s < 2.00 mm

K3, K4: 200 nH < A

L

 < 2200 nH

Material

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N49

5000 

r

25%

1070

250

< 3.50 ( 50 mT, 500 kHz, 100 °C) B66461G0000X149

N92

5500 

r

25%

1170

350

< 9.00 (200 mT, 100 kHz, 100 °C) B66461G0000X192

N87

7300 

r

25%

1560

300

< 8.00 (200 mT, 100 kHz, 100 °C) B66461G0000X187

N97

7500 

r

25%

1590

310

< 7.00 (200 mT, 100 kHz, 100 °C) B66461G0000X197

N95

9000 

r

25%

2012

310

< 8.25 (200 mT, 100 kHz,  25 °C)
< 7.50 (200 mT, 100 kHz, 100 °C)

B66461G0000X195

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

358

–0.794

597

–0.796

540

–0.873

ELP 43/10/28

B66461

Core (without clamp recess)

ELP 43/10/28

epcos-ferrites-and-accessories-html.html
background image

481

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EILP 43
Combination:
ELP 43/10/28 with I 43/4/28

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics 

(per set)

6

l

/

A = 0.225 mm

–1

l

e

= 50.8 mm

A

e

= 225 mm

2

A

min

= 217 mm

2

V

e

= 11430 mm

3

Approx. weight 

60 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

** Plate-type tool type

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EILP 43:

Validity range:

K1, K2: 0.10 mm < s < 2.00 mm

K3, K4: 200 nH < A

L

 < 2200 nH

Mate-

rial

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N49

5900

r

25%

1030 250

< 3.0 ( 50 mT, 500 kHz, 100 °C) B66461G0000X149 (ELP core)

B66461K0000X149 (I core)**

N92

6400

r

25%

1120 350

< 7.8 (200 mT, 100 kHz, 100 °C) B66461G0000X192 (ELP core)

B66461K0000X192 (I core)**

N87

8500

r

25%

1480 300

< 7.0 (200 mT, 100 kHz, 100 °C) B66461G0000X187 (ELP core)

B66461K0000X187 (I core)**

N97

8700

r

25%

1525 310

< 6.0 (200 mT, 100 kHz, 100 °C) B66461G0000X197 (ELP core)

B66461K0000X197 (I core)**

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

390

–0.784

621

–0.796

553

–0.873

ELP 43/10/28

I 43/4/28

B66461

Core (without clamp recess)

ELP 43/10/28 with I 43/4/28

epcos-ferrites-and-accessories-html.html
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482

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EELP 58
Combination: ELP 58/11/38 with ELP 58/11/38

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.26 mm

–1

l

e

= 80.7 mm

A

e

= 310 mm

2

A

min

= 308 mm

2

V

e

= 25000 mm

3

Approx. weight

 130 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EELP 58:

Validity range:

K1, K2: 0.10 mm < s < 1.50 mm

K3, K4: 50 nH < A

L

 < 500 nH

Material

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N87

7400 

r

25%

1540

300

< 15.0 (200 mT, 100 kHz, 100 °C) B66293G0000X187

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

521

–0.732

763

–0.796

705

–0.873

ELP 58/11/38

B66293

Core (without clamp recess)

ELP 58/11/38

epcos-ferrites-and-accessories-html.html
background image

483

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EILP 58
Combination:
ELP 58/11/38 with I 58/4/38

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics 

(per set)

6

l

/

A = 0.22 mm

–1

l

e

= 67.7 mm

A

e

= 310 mm

2

A

min

= 308 mm

2

V

e

= 21000 mm

3

Approx. weight 

110 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

** Plate-type tool type

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EILP 58:

Validity range:

K1, K2: 0.10 mm < s < 1.50 mm

K3, K4: 50 nH < A

L

 < 500 nH

Mate-

rial

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N87

8400

r

25%

1450 300

< 13.0 (200 mT, 100 kHz, 100 °C) B66293G0000X187 (ELP core)

B66293K0000X187 (I core)**

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

591

–0.685

791

–0.796

721

–0.873

I 58/4/38

ELP 58/11/38

B66293

Core (without clamp recess)

ELP 58/11/38 with I 58/4/38

epcos-ferrites-and-accessories-html.html
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484

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EELP 64
Combination: ELP 64/10/50 with ELP 64/10/50

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.15 mm

–1

l

e

= 79.9 mm

A

e

= 519 mm

2

A

min

= 518 mm

2

V

e

= 41500 mm

3

Approx. weight

 210 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EELP 64:

Validity range:

K1, K2: 0.10 mm < s < 2.00 mm

K3, K4: 480 nH < A

L

 < 4800 nH

Material

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N49

8000 

r

30%

980

250

< 10.7 ( 50 mT, 500 kHz, 100 °C) B66295G0000X149

N87

12500 

r

25% 1490

300

< 26.0 (200 mT, 100 kHz, 100 °C) B66295G0000X187

N97

12500 

r

25% 1531

310

< 19.0 (200 mT, 100 kHz, 100 °C) B66295G0000X197

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

820

–0.767

1280

–0.796

1182

–0.873

ELP 64/10/50

B66295

Core (without clamp recess)

ELP 64/10/50

epcos-ferrites-and-accessories-html.html
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485

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EILP 64
Combination:
ELP 64/10/50 with I 64/5/50

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics 

(per set)

6

l

/

A = 0.13 mm

–1

l

e

= 69.7 mm

A

e

= 519 mm

2

A

min

= 518 mm

2

V

e

= 36200 mm

3

Approx. weight

 185 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

** Plate-type tool type

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

EILP 64:

Validity range:

K1, K2: 0.10 mm < s < 2.00 mm

K3, K4: 480 nH < A

L

 < 4800 nH

Mate-

rial

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

(per piece)

N49

8900

r

30%

950 250

< 9.3 ( 50 mT, 500 kHz, 100 °C) B66295G0000X149 (ELP core)

B66295K0000X149 (I core)**

N87

14000

r

25%

1450 300

< 23.0 (200 mT, 100 kHz, 100 °C) B66295G0000X187 (ELP core)

B66295K0000X187 (I core)**

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

835

–0.790

1316

–0.796

1203

–0.873

I 64/5/50

ELP 64/10/50

B66295

Core (without clamp recess)

ELP 64/10/50 with I 64/5/50

epcos-ferrites-and-accessories-html.html
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486

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EELP 102
Combination: ELP 102/20/38 with ELP 102/7/38

To IEC 62317-9

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.274 mm

–1

l

e

= 147.6 mm

A

e

= 538 mm

2

A

min

= 524.5 mm

2

V

e

= 79410 mm

3

Approx. weight

 405 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

(per piece)

N87

8200 

r

25%

1790

< 11.0 (100 mT, 100 kHz, 100 °C)

B66297G0000X187

N97

8500 

r

25%

1855

< 9.7 (100 mT, 100 kHz, 100 °C)

B66297G0000X197

ELP 102/20/38

B66297

Core (without clamp recess)

ELP 102/20/38

epcos-ferrites-and-accessories-html.html
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487

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EILP 102
Combination:
ELP 102/20/38
with I 102/7/38

To IEC 62317-9

Delivery mode:

single units

Magnetic
characteristics

(per set)

6

l

/

A = 0.227 mm

–1

l

e

= 121.2 mm

A

e

= 534.2 mm

2

A

min

= 524.5 mm

2

V

e

= 67745 mm

3

Approx. weight

 330 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

(per piece)

N87

9300 

r

25% 1680 < 8.8 (100 mT, 100 kHz, 100 °C)

B66297G0000X187 (ELP core)

B66297K0000X187 (I core)

N97

9600 

r

25% 1740 < 8.0 (100 mT, 100 kHz, 100 °C)

B66297G0000X197 (ELP core)

B66297K0000X197 (I core)

I 102/7/38

ELP 102/20/38

B66297

Core (without clamp recess)

ELP 102/20/38 with I 102/20/38

epcos-ferrites-and-accessories-html.html
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488

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

EQ planar cores for power applications

Integrating ferrite cores into the PCB has become a common technology in the power supply mar-
ket. In those low-profile designs ferrite planar cores with low losses and high saturation are wide-
spread. The trends are increasing the power density of the throughput transformer and the current 
in the output inductor. Ferrite cores are considered a key component for these targets. EPCOS has 
extended the range of planar ferrite cores to meet the new requirements.

Besides the standard ELP core series EPCOS offers now extended series of planar cores with 
round center post: EQ 13 to EQ 30 and ER 9.5 to ER 32. This wide range of shapes improves the 
design capabilities for individual power converter solutions. Customer-specific heights can be sup-
plied as well as different air gap requirements for all series.

All EPCOS planar cores are available in the well-known EPCOS power materials. Preferred mate-
rials are N97 and N92. N97 is optimized for low losses, N92 for high saturation current in the output 
chokes. N87 is suitable for standard requirements. For frequencies higher than 400 kHz, we recom-
mend N49.

General information

EQ cores

EQ cores

epcos-ferrites-and-accessories-html.html
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489

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EEQ 13
Combination: EQ 13/3 with EQ 13/3

To IEC 62317-9

Optimized cross section

Small overall footprint (core and winding)

Less EMI

Minimized winding length

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l/A = 0.9 mm

–1

l

e

= 17.5 mm

A

e

= 19.8 mm

2

A

min

= 19.2 mm

2

V

e

= 347 mm

3

Approx. weight: 

1.8 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N92

1320 

r

25%

940

< 0.28 (200 mT, 100 kHz, 100 °C)

B66479G0000X192

N49

1360 

r

25%

1360

< 0.07 ( 50 mT, 500 kHz, 100 °C)

B66479G0000X149

N87

1640 

r

25%

1170

< 0.22 (200 mT, 100 kHz, 100 °C)

B66479G0000X187

N97

1700 

r

25%

1196

< 0.18 (200 mT, 100 kHz, 100 °C)

B66479G0000X197

EQ 13/3

B66479

Core

EQ 13 through EQ 30

EQ 13/3

epcos-ferrites-and-accessories-html.html
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490

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EIQ 13
Combination: EQ 13/3 with I 13/1

To IEC 62317-9

Optimized cross section

Small overall footprint (core and winding)

Less EMI

Minimized winding length

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l/A = 0.803 mm

–1

l

e

= 15.9 mm

A

e

= 19.8 mm

2

A

min

= 19.2 mm

2

V

e

= 315 mm

3

Approx. weight: 

1.6 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N92

1550 

r

25%

990 <  0.25 (200 mT, 100 kHz, 100 °C) B66479G0000X192 (EQ core)

B66479P0000X192 (I core)

N49

1600 

r

25% 1020 < 0.06 ( 50 mT, 500 kHz, 100 °C) B66479G0000X149 (EQ core)

B66479P0000X149 (I core)

N87

1700 

r

25% 1100 < 0.20 (200 mT, 100 kHz, 100 °C) B66479G0000X187 (EQ core)

B66479P0000X187 (I core)

N97

1800 

r

25% 1150 < 0.16 (200 mT, 100 kHz, 100 °C) B66479G0000X197 (EQ core)

B66479P0000X197 (I core)

I 13/1

EQ 13/3

B66479

Core

EQ 13/3 with I 13/1

epcos-ferrites-and-accessories-html.html
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491

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EEQ 20
Combination: EQ 20/6 with EQ 20/6

To IEC 62317-9

Optimized cross section

Small overall footprint (core and winding)

Less EMI

Minimized winding length

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l/A = 0.56 mm

–1

l

e

= 33.2 mm

A

e

= 59.0 mm

2

A

min

= 55.0 mm

2

V

e

= 1960 mm

3

Approx. weight: 

11 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N49

2400 

r

25%

1070

< 0.51 ( 50 mT, 500 kHz, 100 °C)

B66483G0000X149

N92

2450 

r

25%

1090

< 1.80 (200 mT, 100 kHz, 100 °C)

B66483G0000X192

N87

3100 

r

25%

1400

< 1.10 (200 mT, 100 kHz, 100 °C)

B66483G0000X187

N97

3200 

r

25%

1430

< 1.00 (200 mT, 100 kHz, 100 °C)

B66483G0000X197

EQ 20/6

B66483

Core

EQ 20/6

epcos-ferrites-and-accessories-html.html
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492

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EIQ 20
Combination: EQ 20/6 with I 20/2

To IEC 62317-9

Optimized cross section

Small overall footprint (core and winding)

Less EMI

Minimized winding length

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l/A = 0.42 mm

–1

l

e

= 25.1 mm

A

e

= 59.8 mm

2

A

min

= 55.0 mm

2

V

e

= 1550 mm

3

Approx. weight: 

8.5 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N92

2950 

r

25%

985 <  1.50 (200 mT, 100 kHz, 100 °C) B66483G0000X192 (EQ core)

B66483P0000X192 (I core)

N49

3000 

r

25% 1000 < 0.40 ( 50 mT, 500 kHz, 100 °C) B66483G0000X149 (EQ core)

B66483P0000X149 (I core)

N87

3680 

r

25% 1230 < 0.85 (200 mT, 100 kHz, 100 °C) B66483G0000X187 (EQ core)

B66483P0000X187 (I core)

N97

3770 

r

25% 1260 < 0.81 (200 mT, 100 kHz, 100 °C) B66483G0000X197 (EQ core)

B66483P0000X197 (I core)

I 20/2

EQ 20/6

B66483

Core

EQ 20/6 with I 20/2

epcos-ferrites-and-accessories-html.html
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493

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EEQ 25
Combination: EQ 25/6 with EQ 25/6

To IEC 62317-9

Optimized cross section

Small overall footprint (core and winding)

Less EMI

Minimized winding length

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l/A = 0.352 mm

–1

l

e

= 32.95 mm

A

e

= 93.51 mm

2

A

min

= 86.40 mm

2

V

e

= 3082 mm

3

Approx. weight: 

16 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N49

3600 

r

25%

1010

< 0.80 ( 50 mT, 500 kHz, 100 °C)

B66481G0000X149

N92

3650 

r

25%

1030

< 2.60 (200 mT, 100 kHz, 100 °C)

B66481G0000X192

N87

4700 

r

25%

1310

< 1.85 (200 mT, 100 kHz, 100 °C)

B66481G0000X187

N97

4800 

r

25%

1350

< 1.54 (200 mT, 100 kHz, 100 °C)

B66481G0000X197

EQ 25/6

B66481

Core

EQ 25/6

epcos-ferrites-and-accessories-html.html
background image

494

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EIQ 25
Combination: EQ 25/6 with I 25/2

To IEC 62317-9

Optimized cross section

Small overall footprint (core and winding)

Less EMI

Minimized winding length

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l/A = 0.294 mm

–1

l

e

= 26.4 mm

A

e

= 89.7 mm

2

A

min

= 82.8 mm

2

V

e

= 2370 mm

3

Approx. weight: 

13 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N92

4150 

r

25%

970 <  2.10 (200 mT, 100 kHz, 100 °C) B66481G0000X192 (EQ core)

B66481P0000X192 (I core)

N49

4200 

r

25%

990 < 0.65 ( 50 mT, 500 kHz, 100 °C) B66481G0000X149 (EQ core)

B66481P0000X149 (I core)

N87

5100 

r

25% 1200 < 1.50 (200 mT, 100 kHz, 100 °C) B66481G0000X187 (EQ core)

B66481P0000X187 (I core)

N97

5300 

r

25% 1250 < 1.25 (200 mT, 100 kHz, 100 °C) B66481G0000X197 (EQ core)

B66481P0000X197 (I core)

I 25/2

EQ 25/6

B66481

Core

EQ 25/6 with I 25/2

epcos-ferrites-and-accessories-html.html
background image

495

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EEQ 30
Combination: EQ 30/8 with EQ 30/8

To IEC 62317-9

Optimized cross section

Small overall footprint (core and winding)

Less EMI

Minimized winding length

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l/A = 0.426 mm

–1

l

e

= 46 mm

A

e

= 108 mm

2

A

min

= 95 mm

2

V

e

= 4970 mm

3

Approx. weight: 

23 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N92

3270 

r

25%

1110

< 4.25 (200 mT, 100 kHz, 100 °C)

B66506G0000X192

N49

3330 

r

25%

1130

< 1.43 ( 50 mT, 500 kHz, 100 °C)

B66506G0000X149

N87

4300 

r

25%

1470

< 2.70 (200 mT, 100 kHz, 100 °C)

B66506G0000X187

N97

4500 

r

25%

1540

< 2.50 (200 mT, 100 kHz, 100 °C)

B66506G0000X197

EQ 30/8

B66506

Core

EQ 30/8

epcos-ferrites-and-accessories-html.html
background image

496

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EIQ 30
Combination: EQ 30/8 with I 30/3

To IEC 62317-9

Optimized cross section

Small overall footprint

(core and winding)

Less EMI

Minimized winding length

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l/A = 0.29 mm

–1

l

e

= 31.5 mm

A

e

= 108.0 mm

2

A

min

= 95.0 mm

2

V

e

= 3400 mm

3

Approx. weight: 

21.5 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N49

4350 

r

25% 1000 < 1.10 ( 50 mT, 500 kHz, 100 °C) B66506G0000X149 (EQ core)

B66506P0000X149 (I core)

N92

4450 

r

25% 1020 < 3.40 (200 mT, 100 kHz, 100 °C) B66506G0000X192 (EQ core)

B66506P0000X192 (I core)

N87

5600 

r

25% 1300 < 2.15 (200 mT, 100 kHz, 100 °C) B66506G0000X187 (EQ core)

B66506P0000X187 (I core)

N97

5750 

r

25% 1330 < 2.00 (200 mT, 100 kHz, 100 °C) B66506G0000X197 (EQ core)

B66506P0000X197 (I core)

I 30/3

EQ 30/8

B66506

Core

EQ 30/8 with I 30/3

epcos-ferrites-and-accessories-html.html
background image

497

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Example of an assembly set ER 11/5

General information

ER planar cores

ER planar cores

epcos-ferrites-and-accessories-html.html
background image

498

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-9

For transformers featuring high inductance

and low overall height

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 1.54 mm

–1

l

e

= 13.6 mm

A

e

= 8.81 mm

2

V

e

= 120 mm

3

Approx. weight

 0.6 g/set

Ungapped

Material

A

L

 value

nH

P

e

Ordering code

N87

800 +30/–20%

1000

B65523J0000R087

N92

660 +30/–20%

811

B65523J0000R092

N97

840 +30/–20%

1032

B65523J0000R097

T38

4500 +40/–30%

5680

B65523J0000Y038

FEK0530-Z

0.3

9.5

_

5

_

0.2

0.2
5

_

3.2+0.3

ø3.5 0.2

_

ø7.5+0.25

7 min.

B65523

ER 9.5/5 through ER 32

Planar core

ER 9.5/5

epcos-ferrites-and-accessories-html.html
background image

499

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

SMD coil former with gullwing terminals

Material:

GFR liquid crystal polymer (UL 94 V-0, insulation class to IEC 60085:

F

 max. operating temperature 155 °C), color code black

Vectra E 130i 

>

E106764 (M)

@

, POLYPLASTICS CO LTD

Vectra E 130i 

>

E83005 (M)

@

, TICONA

Solderability: to IEC 60068-2-58, test Td, method 6 (Group 3): 245 °C, 3 s
Resistance to soldering heat: to IEC 60068-2-58, test Td, method 6 (Group 3): 255 °C, 10 s

permissible soldering temperature for wire-wrap connection on coil former: 400 °C, 1 s

Winding:

see 

“Processing notes”

, page 179

Yoke

Material:

Stainless spring steel (0.1 mm)

Coil former

Yoke

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Terminals

1

3.23

18.4

196

8

B65527B1008T001

Yoke

B65527A2000X000

B65527

Accessories

ER 9.5/5

epcos-ferrites-and-accessories-html.html
background image

500

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-9

For transformers featuring high inductance

and low overall height

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 1.1 mm

–1

l

e

= 14.1 mm

A

e

= 12.4 mm

2

V

e

= 174 mm

3

Approx. weight

 0.85 g/set

Ungapped

Gapped

Material

A

L

 value

nH

P

e

Ordering code

N49

800 +30/–20%

715

B65525J0000R049

N87

1200 +30/–20%

1050

B65525J0000R087

N92

900 +30/–20%

814

B65525J0000R092

N97

1200 +30/–20%

1086

B65525J0000R097

T38

6400 +40/–30%

5600

B65525J0000Y038

Material

A

L

 value

nH

s

approx.

mm

P

e

Ordering code

N87

160 

r

3%

0.08

140

B65525J0160A087

B65525

Planar core

ER 11/5

epcos-ferrites-and-accessories-html.html
background image

501

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

SMD coil former with gullwing terminals

Material:

GFR liquid crystal polymer (UL 94 V-0, insulation class to IEC 60085:

F

 max. operating temperature 155 °C), color code black

Zenite 7130

®

>

E344082 (M)

@

, TICONA

Solderability: to IEC 60068-2-58, test Td, method 6 (Group 3): 245 °C, 3 s
Resistance to soldering heat: to IEC 60068-2-58, test Td, method 6 (Group 3): 255 °C, 10 s

permissible soldering temperature for wire-wrap connection on coil former: 400 °C, 1 s 

Winding:

see 

“Processing notes”

, page 179

Yoke

Material: Stainless spring steel (0.15 mm)

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Terminals

1

3.3

21.6

225

10

B65526B1010T001

Yoke

B65526A2000X000

Recommended
PCB layout

Marking of pin 1

Coil former

Yoke

Recommended
PCB layout

Marking of pin 1

B65526

Accessories

ER 11/5

epcos-ferrites-and-accessories-html.html
background image

502

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-9

For transformers featuring high inductance

and low overall height

Delivery mode: sets

Magnetic characteristics

 (per set)

6

l

/

A = 1.1 mm

–1

l

e

= 19 mm

A

e

= 17.6 mm

2

V

e

= 333 mm

3

Approx. weight

 1.8 g/set

Ungapped

Material

A

L

 value

nH

P

e

Ordering code

N49

1100 +30/–20%

800

B65513J0000R049

N92

1100 +30/–20%

970

B65513J0000R092

N87

1500 +30/–20%

1250

B65513J0000R087

N97

1500 +30/–20%

1290

B65513J0000R097

B65513

Planar core

ER 14.5/6

epcos-ferrites-and-accessories-html.html
background image

503

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-9

Optimized winding area

Small overall footprint (core and winding)

Less EMI

Minimized winding length

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l/A = 0.732 mm

–1

l

e

= 22.1 mm

A

e

= 30.2 mm

2

A

min

= 30.1 mm

2

V

e

= 667 mm

3

Approx. weight: 

3.5 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N49

1800 

r

25%

1050

< 0.10 ( 50 mT, 500 kHz, 100 °C)

B66480G0000X149

N92

1800 

r

25%

1050

< 0.39 (200 mT, 100 kHz, 100 °C)

B66480G0000X192

N87

2300 

r

25%

1340

< 0.35 (200 mT, 100 kHz, 100 °C)

B66480G0000X187

N97

2300 

r

25%

1340

< 0.30 (200 mT, 100 kHz, 100 °C)

B66480G0000X197

B66480

Planar core

ER 18/3/10

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background image

504

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EER 23
Combination: ER 23/5/13 with ER 23/5/13

To IEC 62317-9

Optimized winding area

Small overall footprint (core and winding)

Less EMI

Minimized winding length

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l/A = 0.648 mm

–1

l

e

= 32.6 mm

A

e

= 50.3 mm

2

A

min

= 50.0 mm

2

V

e

= 1640 mm

3

Approx. weight: 

7.8 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Material

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

N49

2200 

r

25%

1140

250

< 0.25 ( 50 mT, 500 kHz, 100 °C) B66482G0000X149

N92

2200 

r

25%

1140

350

< 0.95 (200 mT, 100 kHz, 100 °C) B66482G0000X192

N87

3000 

r

25%

1550

300

< 0.86 (200 mT, 100 kHz, 100 °C) B66482G0000X187

N97

3000 

r

25%

1550

310

< 0.69 (200 mT, 100 kHz, 100 °C) B66482G0000X197

N95

3700 

r

25%

1835

310

< 1.05 (200 mT, 100 kHz,  25 °C)
< 0.86 (200 mT, 100 kHz, 100 °C)

B66482G0000X195

ER 23/5/13

B66482

Planar core

ER 23/5/13

epcos-ferrites-and-accessories-html.html
background image

505

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EIR 23
Combination:
ER 23/5/13 with I 23/2/13

To IEC 62317-9

Optimized winding area

Small overall footprint

(core and winding)

Less EMI

Minimized winding length

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l/A = 0.53 mm

–1

l

e

= 26.6 mm

A

e

= 50.3 mm

2

A

min

= 50.0 mm

2

V

e

= 1335 mm

3

Approx. weight: 

6.4 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N49

2600 

r

25% 1100 <  0.21 ( 50 mT, 500 kHz, 100 °C) B66482G0000X149 (ER core)

B66482K0000X149 (I core)

N92

2600 

r

25% 1100 < 0.77 (200 mT, 100 kHz, 100 °C) B66482G0000X192 (ER core)

B66482K0000X192 (I core)

N87

3400 

r

25% 1430 < 0.70 (200 mT, 100 kHz, 100 °C) B66482G0000X187 (ER core)

B66482K0000X187 (I core)

N97

3400 

r

25% 1430 < 0.56 (200 mT, 100 kHz, 100 °C) B66482G0000X197 (ER core)

B66482K0000X197 (I core)

I 23/2/13

ER 23/5/13

B66482

Planar core

ER 23/5/13 with I 23/2/13

epcos-ferrites-and-accessories-html.html
background image

506

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EER 25
Combination: ER 25/6/15 with ER 25/6/15

To IEC 62317-9

Optimized winding area

Small overall footprint (core and winding)

Less EMI

Minimized winding length

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l/A = 0.482 mm

–1

l

e

= 34.1 mm

A

e

= 70.8 mm

2

A

min

= 69.4 mm

2

V

e

= 2414 mm

3

Approx. weight: 

14.2 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N49

3000 

r

25%

1150

< 0.34 ( 50 mT, 500 kHz, 100 °C)

B66484G0000X149

N92

3000 

r

25%

1150

< 1.40 (200 mT, 100 kHz, 100 °C)

B66484G0000X192

N87

4100 

r

25%

1570

< 1.27 (200 mT, 100 kHz, 100 °C)

B66484G0000X187

N97

4100 

r

25%

1570

< 1.01 (200 mT, 100 kHz, 100 °C)

B66484G0000X197

ER 25/6/15

B66484

Planar core

ER 25/6/15

epcos-ferrites-and-accessories-html.html
background image

507

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Core set EIR 25
Combination:
ER 25/6/15 with I 25/3/15

To IEC 62317-9

Optimized winding area

Small overall footprint

(core and winding)

Less EMI

Minimized winding length

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l/A = 0.399 mm

–1

l

e

= 28.1 mm

A

e

= 70.4 mm

2

A

min

= 69.4 mm

2

V

e

= 1978 mm

3

Approx. weight: 

11.5 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N49

3400 

r

25% 1080 <  0.30 ( 50 mT, 500 kHz, 100 °C) B66484G0000X149 (ER core)

B66484K0000X149 (I core)

N92

3400 

r

25% 1080 < 1.14 (200 mT, 100 kHz, 100 °C) B66484G0000X192 (ER core)

B66484K0000X192 (I core)

N87

4600 

r

25% 1460 < 1.04 (200 mT, 100 kHz, 100 °C) B66484G0000X187 (ER core)

B66484K0000X187 (I core)

N97

4600 

r

25% 1460 < 0.83 (200 mT, 100 kHz, 100 °C) B66484G0000X197 (ER core)

B66484K0000X197 (I core)

I 25/3/15

ER 25/6/15

B66484

Planar core

ER 25/6/15 with I 25/3/15

epcos-ferrites-and-accessories-html.html
background image

508

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-9

Optimized winding area

Small overall footprint (core and winding)

Less EMI

Minimized winding length

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l/A = 0.381 mm

–1

l

e

= 38.3 mm

A

e

= 100.5 mm

2

A

min

= 98.5 mm

2

V

e

= 3847 mm

3

Approx. weight: 

23.3 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Material A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

N49

3800 

r

25%

1050

< 0.59 ( 50 mT, 500 kHz, 100 °C) B66501G0000X149

N92

3800 

r

25%

1050

350

< 2.40 (200 mT, 100 kHz, 100 °C) B66501G0000X192

N87

4900 

r

25%

1350

300

< 2.40 (200 mT, 100 kHz, 100 °C) B66501G0000X187

N97

5000 

r

25%

1380

320

< 2.20 (200 mT, 100 kHz, 100 °C) B66501G0000X197

B66501

Planar core

ER 32/5/21

epcos-ferrites-and-accessories-html.html
background image

509

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Example of an assembly set ER 42

ER cores are the ideal answer when compact winding structures with low leakage inductance are 
needed. The round center leg is an advantage together with thick wires or bands.

Because of their good thermal response, ER cores are especially suitable for applications with high 
power density. E.g. they are used in flyback converters for TVs and monitors.

General information

ER cores

ER cores

epcos-ferrites-and-accessories-html.html
background image

510

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-7

Round center leg particularly suitable

for use of thick winding wires or tapes

For compact winding design with

low leakage inductance

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.88 mm

–1

l

e

= 75.0  mm

A

e

= 85.4 mm

2

A

min

= 77.0 mm

2

V

e

= 6400 mm

3

Approx. weight

 32 g/set

Ungapped          

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N72

2700 +30/–20%

1890

< 0.80 (200 mT, 25 kHz, 100 °C)

B66433G0000X172

B66433

ER 28, ER 35 through ER 54

Core

ER 28/17/11

epcos-ferrites-and-accessories-html.html
background image

511

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-7

Round center leg particularly suitable

for use of thick winding wires or tapes

For compact winding design with

low leakage inductance

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.81 mm

–1

l

e

= 89.6  mm

A

e

= 111 mm

2

A

min

= 101 mm

2

V

e

= 9950 mm

3

Approx. weight

 52 g/set

Ungapped

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 2.50 mm

K3, K4: 90 nH < A

L

 < 600 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

2500 +30/–20%

1610

< 1.95 (200 mT,  25 kHz, 100 °C)

B66350G0000X127

N87

2700 +30/–20%

1735

< 5.20 (200 mT, 100 kHz, 100 °C)

B66350G0000X187

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

N27

0.50

r

0.05

275

177

B66350G0500X127

1.00

r

0.05

170

109

B66350G1000X127

1.50 

r

0.05

125

80

B66350G1500X127

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

169

–0.706

275

–0.847

256

–0.865

B66350

Core

ER 35/20/11

epcos-ferrites-and-accessories-html.html
background image

512

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Round center leg particularly suitable

for use of thick winding wires or tapes

For compact winding design with

low leakage inductance

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.58 mm

–1

l

e

= 99 mm

A

e

= 170 mm

2

A

min

= 170 mm

2

V

e

= 16800 mm

3

Approx. weight

 84 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 3.00 mm

K3, K4: 110 nH < A

L

 < 1100 nH

Material

A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

N27

3200 +30/–20% 1480

320

< 3.1 (200 mT,  25 kHz, 100 °C) B66347G0000X127

N87

3700 +30/–20% 1710

320

< 9.0 (200 mT, 100 kHz, 100 °C) B66347G0000X187

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

N27

1.00

r

0.05

257

119

B66347G1000X127

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

257

–0.741

415

–0.847

387

–0.865

N87

257

–0.741

401

–0.796

377

–0.873

B66347

Core

ER 42/22/15

epcos-ferrites-and-accessories-html.html
background image

513

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

F

max. operating temperature 155 °C), color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 177

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

1

222

70.8

18.6

18

B66348A1018T001

B66348

Accessories

ER 42/22/15

epcos-ferrites-and-accessories-html.html
background image

514

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Round center leg particularly suitable

for use of thick winding wires or tapes

For compact winding design with

low leakage inductance

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.34 mm

–1

l

e

= 79 mm

A

e

= 233 mm

2

A

min

= 226 mm

2

V

e

= 18400 mm

3

Approx. weight

 98 g/set

Ungapped

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 1.00 mm

K3, K4: 190 nH < A

L

 < 1850 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

5700 +30/–20%

1550

< 3.62 (200 mT, 25 kHz, 100 °C)

B66377G0000X127

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

N27

1.00

r

0.05

343

93

B66377G1000X127

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

343

–0.826

589

–0.847

546

–0.865

B66377

Core

ER 46/17/18

epcos-ferrites-and-accessories-html.html
background image

515

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 62317-7

Round center leg particularly suitable

for use of thick winding wires or tapes

For compact winding design with

low leakage inductance

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.49 mm

–1

l

e

= 118 mm

A

e

= 243 mm

2

A

min

= 225 mm

2

V

e

= 28700 mm

3

Approx. weight

 146 g/set

Ungapped

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 3.50 mm

K3, K4: 130 nH < A

L

 < 1300 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

3500 +30/–20%

1350

< 5.38 (200 mT, 25 kHz, 100 °C)

B66391G0000X127

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

342

–0.750

578

–0.847

540

–0.865

B66391

Core

ER 49/27/17

epcos-ferrites-and-accessories-html.html
background image

516

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Round center leg particularly suitable

for use of thick winding wires or tapes

For compact winding design with

low leakage inductance

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.35 mm

–1

l

e

= 90 mm

A

e

= 256 mm

2

A

min

= 252 mm

2

V

e

= 23000 mm

3

Approx. weight

 119 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.15 mm < s < 3.50 mm

K3, K4: 180 nH < A

L

 < 1800 nH

Material A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

N27

5600 +30/–20% 1560

320

< 4.4 (200 mT, 25 kHz, 100 °C)

B66357G0000X127

N87

5800 +30/–20% 1620

320

< 12.5 (200 mT, 100 kHz, 100 °C) B66357G0000X187

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

N27

0.50

r

0.05

620

173

B66357G0500X127

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

360

–0.786

635

–0.847

590

–0.865

N87

360

–0.786

616

–0.796

574

–0.873

B66357

Core

ER 54/18/18

epcos-ferrites-and-accessories-html.html
background image

517

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Example of an assembly set (ETD 34)

Yoke

Core

Coil former

Core

Yoke

General information

ETD cores

ETD cores

epcos-ferrites-and-accessories-html.html
background image

518

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61185

For SMPS transformers with optimum

weight/performance ratio at small volume

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.93 mm

–1

l

e

= 70.4 mm

A

e

= 76.0 mm

2

A

min

= 71.0 mm

2

V

e

= 5350 mm

3

Approx. weight

 28 g/set

Ungapped     

    

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 2.00 mm

K3, K4: 70 nH < A

L

 < 680 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

2000 +30/–20%

1470

< 1.04 (200 mT,  25 kHz, 100 °C)

B66358G0000X127

N87

2200 +30/–20%

1610

< 2.80 (200 mT, 100 kHz, 100 °C)

B66358G0000X187

N97

2250 +30/–20%

1670

< 2.40 (200 mT, 100 kHz, 100 °C)

B66358G0000X197

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

** = 27 (N27)

**

 = 87 (N87)

N27,

0.10

r

0.02

621

457

B66358G0100X1**

N87

0.20

r

0.02

383

281

B66358G0200X1**

0.50

r

0.05

201

148

B66358G0500X1**

1.00 

r

0.05

124

91

B66358G1000X1**

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

124

–0.7

195

–0.847

181

–0.865

N87

124

–0.7

192

–0.796

176

–0.873

B66358

ETD 29/16/10 through ETD 59/31/22

Core

ETD 29/16/10

epcos-ferrites-and-accessories-html.html
background image

519

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former 

(magnetic axis horizontal)

Material:

GFR polyterephthalate, UL 94 V-0, insulation class to IEC 60085:

B66359B: F   max. operating temperature 155 °C, color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

B66359W: H   max. operating temperature 180 °C, color code black

Rynite FR 530

®

>

E41938 (M)

@

, E I DUPONT DE NEMOURS & CO INC

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 177

Squared pins.

Yoke

Material:

Stainless spring steel (0.3 mm)

Coil former

Yoke

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

1

97

52.8

18.7

13

B66359B1013T001
B66359W1013T001

Yoke (ordering code per piece, 2 are required)

B66359S2000X000

B66359

Accessories

ETD 29/16/10

epcos-ferrites-and-accessories-html.html
background image

520

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former 

(magnetic axis vertical)

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180 °C), color code black

Rynite FR 530

®

>

E41938 (M)

@

, E I DUPONT DE NEMOURS & CO INC

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 177

Squared pins.

Yoke

Material:

Stainless spring steel (0.3 mm)

Coil former

Yoke

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

1

97

52.8

18.7

14

B66359X1014T001

Yoke (ordering code per piece, 2 are required)

B66359A2000X000

B66359

Accessories

ETD 29/16/10

epcos-ferrites-and-accessories-html.html
background image

521

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61185

For SMPS transformers with optimum

weight/performance ratio at small volume

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.81 mm

–1

l

e

= 78.6 mm

A

e

= 97.1 mm

2

A

min

= 91.6 mm

2

V

e

= 7630 mm

3

Approx. weight

 40 g/set

Ungapped

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

2400 +30/–20%

1540

< 1.48 (200 mT,  25 kHz, 100 °C)

B66361G0000X127

N87

2600 +30/–20%

1670

< 4.00 (200 mT, 100 kHz, 100 °C)

B66361G0000X187

N97

2650 +30/–20%

1710

< 3.40 (200 mT, 100 kHz, 100 °C)

B66361G0000X197

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

** = 27 (N27)

**

 = 87 (N87)

N27,

0.10

r

0.02

790

508

B66361G0100X1**

N87

0.20

r

0.02

482

310

B66361G0200X1**

0.50

r

0.05

251

161

B66361G0500X1**

1.00 

r

0.05

153

98

B66361G1000X1**

B66361

Core

ETD 34/17/11

epcos-ferrites-and-accessories-html.html
background image

522

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 2.50 mm

K3, K4: 80 nH < A

L

 < 780 nH

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

153

–0.713

245

–0.847

227

–0.865

N87

153

–0.713

240

–0.796

222

–0.873

B66361

Core

ETD 34/17/11

epcos-ferrites-and-accessories-html.html
background image

523

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former 

(magnetic axis horizontal)

Material:

GFR polyterephthalate, UL 94 V-0, insulation class to IEC 60085:

B66362B: F   max. operating temperature 155 °C, color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

B66362W: H   max. operating temperature 180 °C, color code black

Rynite FR 530

®

>

E41938 (M)

@

, E I DUPONT DE NEMOURS & CO INC

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 177

Yoke

Material:

Stainless spring steel (0.4 mm)         

Coil former          

Yoke

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

1

122

60.5

17

14

B66362B1014T001
B66362W1014T001

Yoke (ordering code per piece, 2 are required)

B66362A2000X000

B66362

Accessories

ETD 34/17/11

epcos-ferrites-and-accessories-html.html
background image

524

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former 

(magnetic axis vertical)

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180 °C), color code black

Rynite FR 530

®

>

E41938 (M)

@

, E I DUPONT DE NEMOURS & CO INC

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 177

Yoke

Material:

Stainless spring steel (0.4 mm)

Coil former

Yoke

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

1

122

60.5

17

14

B66362X1014T001

Yoke (ordering code per piece, 2 are required)

B66362A2000X000

B66362

Accessories

ETD 34/17/11

epcos-ferrites-and-accessories-html.html
background image

525

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61185

For SMPS transformers with optimum

weight/performance ratio at small volume

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.74 mm

–1

l

e

= 92.2 mm

A

e

= 125 mm

2

A

min

= 123 mm

2

V

e

= 11500 mm

3

Approx. weight

 60 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 3.00 mm

K3, K4: 90 nH < A

L

 < 850 nH

Material A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

N27

2550 +30/–20% 1500

320

< 2.22 (200 mT,  25 kHz, 100 °C) B66363G0000X127

N87

2700 +30/–20% 1600

320

< 6.00 (200 mT, 100 kHz, 100 °C) B66363G0000X187

N97

2800 +30/–20% 1650

320

< 5.10 (200 mT, 100 kHz, 100 °C) B66363G0000X197

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

** = 27 (N27)

**

 = 87 (N87)

N27,

0.10

r

0.02

1062

622

B66363G0100X1**

N87

0.20

r

0.02

639

374

B66363G0200X1**

0.50

r

0.05

326

191

B66363G0500X1**

1.00 

r

0.05

196

115

B66363G1000X1**

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

196

–0.734

308

–0.847

287

–0.865

N87

196

–0.734

300

–0.796

280

–0.873

B66363

Core

ETD 39/20/13

epcos-ferrites-and-accessories-html.html
background image

526

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR polyterephthalate, UL 94 V-0, insulation class to IEC 60085:

B66364B: F   max. operating temperature 155 °C, color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

B66364W: H   max. operating temperature 180 °C, color code black

Rynite FR 530

®

>

E41938 (M)

@

, E I DUPONT DE NEMOURS & CO INC

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 177

Yoke

Material:

Stainless spring steel (0.4 mm)

Coil former

Yoke

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

1

178

69

13.3

16

B66364B1016T001
B66364W1016T001

Yoke (ordering code per piece, 2 are required)

B66364A2000X000

B66364

Accessories

ETD 39/20/13

epcos-ferrites-and-accessories-html.html
background image

527

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61185

For SMPS transformers with optimum

weight/performance ratio at small volume

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.6 mm

–1

l

e

= 103 mm

A

e

= 173 mm

2

A

min

= 172 mm

2

V

e

= 17800 mm

3

Approx. weight

 94 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Material A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

N27

3300 +30/–20% 1560

320

< 3.48 (200 mT,  25 kHz, 100 °C) B66365G0000X127

N87

3500 +30/–20% 1650

320

< 9.40 (200 mT, 100 kHz, 100 °C) B66365G0000X187

N97

3600 +30/–20% 1720

320

< 8.00 (200 mT, 100 kHz, 100 °C) B66365G0000X197

N95

4400 +30/–20% 2085

330

< 8.85 (200 mT, 100 kHz, 100 °C) B66365G0000X195

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

** = 27 (N27)

**

 = 87 (N87)

N27,

0.20

r

0.02

862

407

B66365G0200X1**

N87

0.50

r

0.05

438

207

B66365G0500X1**

1.00

r

0.05

262

124

B66365G1000X1**

1.50 

r

0.05

194

92

B66365G1500X1**

B66365

Core

ETD 44/22/15

epcos-ferrites-and-accessories-html.html
background image

528

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 3.50 mm

K3, K4: 110 nH < A

L

 < 1060 nH

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

262

–0.74

420

–0.847

391

–0.865

N87

262

–0.74

420

–0.796

382

–0.873

B66365

Core

ETD 44/22/15

epcos-ferrites-and-accessories-html.html
background image

529

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR polyterephthalate, UL 94 V-0, insulation class to IEC 60085:

B66366B: F   max. operating temperature 155 °C, color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

B66366W: H   max. operating temperature 180 °C, color code black

Rynite FR 530

®

>

E41938 (M)

@

, E I DUPONT DE NEMOURS & CO INC

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 177

Yoke

Material:

Stainless spring steel (0.4 mm)

Coil former

Yoke

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

1

210

77.7

12.7

18

B66366B1018T001
B66366W1018T001

Yoke (ordering code per piece, 2 are required)

B66366A2000X000

B66366

Accessories

ETD 44/22/15

epcos-ferrites-and-accessories-html.html
background image

530

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61185

For SMPS transformers with optimum

weight/performance ratio at small volume

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.54 mm

–1

l

e

= 114 mm

A

e

= 211 mm

2

A

min

= 209 mm

2

V

e

= 24100 mm

3

Approx. weight

 124 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Material A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

N27

3700 +30/–20% 1590 320

< 4.59 (200 mT,  25 kHz, 100 °C) B66367G0000X127

N87

3800 +30/–20% 1630 320

< 12.40 (200 mT, 100 kHz, 100 °C) B66367G0000X187

N97

3900 +30/–20% 1680 320

< 10.60 (200 mT, 100 kHz, 100 °C) B66367G0000X197

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

** = 27 (N27)

**

 = 87 (N87)

N27,

0.20

r

0.02

1035

444

B66367G0200X1**

N87

0.50

r

0.05

525

225

B66367G0500X1**

1.00

r

0.05

314

135

B66367G1000X1**

2.00 

r

0.05

188

81

B66367G2000X1**

B66367

Core

ETD 49/25/16

epcos-ferrites-and-accessories-html.html
background image

531

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 3.50 mm

K3, K4: 120 nH < A

L

 < 1160 nH

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

314

–0.741

504

–0.847

470

–0.865

N87

314

–0.741

485

–0.796

460

–0.873

B66367

Core

ETD 49/25/16

epcos-ferrites-and-accessories-html.html
background image

532

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR polyterephthalate, UL 94 V-0, insulation class to IEC 60085:

B66368B: F   max. operating temperature 155 °C, color code black

Valox 420-SE0

®

>

E45329 (M)

@

, GE PLASTICS B V

B66368W: H   max. operating temperature 180 °C, color code black

Rynite FR 530

®

>

E41938 (M)

@

, E I DUPONT DE NEMOURS & CO INC

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 177

Yoke

Material:

Stainless spring steel (0.4 mm)

Coil former

Yoke

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

1

269.4

86

11

20

B66368B1020T001
B66368W1020T001

Yoke (ordering code per piece, 2 are required)

B66368A2000X000

B66368

Accessories

ETD 49/25/16

epcos-ferrites-and-accessories-html.html
background image

533

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61185

For SMPS transformers with optimum

weight/performance ratio at small volume

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.45 mm

–1

l

e

= 127 mm

A

e

= 280 mm

2

A

min

= 280 mm

2

V

e

= 35600 mm

3

Approx. weight

 180 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Material A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

N27

4200 +30/–20% 1510

320

< 6.66 (200 mT,  25 kHz, 100 °C) B66395G0000X127

N87

4450 +30/–20% 1600

320

< 3.20 (100 mT, 100 kHz, 100 °C) B66395G0000X187

N97

4600 +30/–20% 1650

320

< 2.60 (100 mT, 100 kHz, 100 °C) B66395G0000X197

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

** = 27 (N27)

**

 = 87 (N87)

N27,

0.20

r

0.02

1377

496

B66395G0200X1**

N87

1.00

r

0.05

393

141

B66395G1000X1**

1.50

r

0.05

287

103

B66395G1500X1**

2.00 

r

0.05

229

82

B66395G2000X1**

B66395

Core

ETD 54/28/19

epcos-ferrites-and-accessories-html.html
background image

534

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 3.50 mm

K3, K4: 140 nH < A

L

 < 1390 nH

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

393

–0.779

658

–0.847

615

–0.865

N87

393

–0.779

630

–0.796

603

–0.873

B66395

Core

ETD 54/28/19

epcos-ferrites-and-accessories-html.html
background image

535

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180 °C), color code black

Rynite FR 530

®

>

E41938 (M)

@

, E I DUPONT DE NEMOURS & CO INC

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 177

Yoke

Material:

Stainless spring steel (0.4 mm)

Coil former

Yoke

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

1

315.6

96

10.5

22

B66396W1022T001

Yoke (ordering code per piece, 2 are required)

B66396A2000X000

B66396

Accessories

ETD 54/28/19

epcos-ferrites-and-accessories-html.html
background image

536

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

To IEC 61185

For SMPS transformers with optimum

weight/performance ratio at small volume

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.38 mm

–1

l

e

= 139 mm

A

e

= 368 mm

2

A

min

= 368 mm

2

V

e

= 51200 mm

3

Approx. weight

 260 g/set

Ungapped

* H = 250 A/m; f = 10 kHz; T = 100 °C

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Material A

L

 value

nH

P

e

B

S

*

mT

P

V

W/set

Ordering code

N27

5000 +30/–20% 1500

320

< 9.62 (200 mT,  25 kHz, 100 °C) B66397G0000X127

N87

5300 +30/–20% 1590

320

< 5.20 (100 mT, 100 kHz, 100 °C) B66397G0000X187

N97

5500 +30/–20% 1660

320

< 4.50 (100 mT, 100 kHz, 100 °C) B66397G0000X197

Material

g

mm

A

L

 value

approx.

nH

P

e

Ordering code

** = 27 (N27)

**

 = 87 (N87)

N27,

0.20

r

0.02

1588

476

B66397G0200X1**

N87

1.00

r

0.05

508

152

B66397G1000X1**

1.50

r

0.05

381

114

B66397G1500X1**

2.00 

r

0.05

311

93

B66397G2000X1**

B66397

Core

ETD 59/31/22

epcos-ferrites-and-accessories-html.html
background image

537

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 3.50 mm

K3, K4: 170 nH < A

L

 < 1660 nH

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N27

508

–0.708

853

–0.847

799

–0.865

N87

508

–0.708

812

–0.796

783

–0.873

B66397

Core

ETD 59/31/22

epcos-ferrites-and-accessories-html.html
background image

538

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:

H  max. operating temperature 180 °C), color code black

Rynite FR 530

®

>

E41938 (M)

@

, E I DUPONT DE NEMOURS & CO INC

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 177

Yoke

Material:

Stainless spring steel (0.4 mm)

Coil former

Yoke

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

1

365.6

106.1

10.0

24

B66398W1024T001

Yoke (ordering code per piece, 2 are required)

B66398A2000X000

B66398

Accessories

ETD 59/31/22

epcos-ferrites-and-accessories-html.html
background image

539

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Example of an assembly set

Coil former

FEK0270-A-E

Core

Yoke

General information

EFD cores

EFD cores

epcos-ferrites-and-accessories-html.html
background image

540

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

E core with flattened, lower center leg

for especially flat transformer design

For DC/DC converters

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 3.21 mm

–1

l

e

= 23.1 mm

A

e

= 7.2 mm

2

A

min

= 6.5 mm

2

V

e

= 166 mm

3

Approx. weight

 0.8 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N49

370 +30/–20%

940

< 0.032 ( 50 mT, 500 kHz, 100 °C) B66411G0000X149

N87

450 +30/–20%

1150

< 0.090 (200 mT, 100 kHz, 100 °C) B66411G0000X187

N97

470 +30/–20%

1200

< 0.080 (200 mT, 100 kHz, 100 °C) B66411G0000X197

B66411

Core

EFD 10/5/3

EFD 10/5/3 through EFD 30/15/9

epcos-ferrites-and-accessories-html.html
background image

541

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

E core with flattened, lower center leg

for especially flat transformer design

For DC/DC converters

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 2.27 mm

–1

l

e

= 34 mm

A

e

= 15 mm

2

A

min

= 12.2 mm

2

V

e

= 510 mm

3

Approx. weight

 2.8 g/set

Ungapped

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 1.00 mm

K3, K4: 30 nH < A

L

 < 280 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N49

600 +30/–20%

1080

< 0.11 ( 50 mT, 500 kHz, 100 °C)

B66413G0000X149

N87

780 +30/–20%

1400

< 0.28 (200 mT, 100 kHz, 100 °C)

B66413G0000X187

N97

820 +30/–20%

1480

< 0.23 (200 mT, 100 kHz, 100 °C)

B66413G0000X197

Material

A

L

 value

nH

P

e

g

approx. mm

Ordering code

N87

100

r

10%

180

0.17

B66413U0100K187

160 

r

15%

288

0.08

B66413U0160L187

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

29.7

–0.676

44.2

–0.796

33.2

–0.873

B66413

Core

EFD 15/8/5

epcos-ferrites-and-accessories-html.html
background image

542

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H

max.operating temperature 180 °C), color code black

Sumikon PM 9630

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 176

Squared pins.

Yoke

Material:

Stainless spring steel (0.25 mm)

Coil former

Yoke

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

1

15.5

35.9

79.7

8

B66414W1008D001

Yoke (ordering code per piece, 2 are required)

B66414B2000X000

B66414

Accessories

EFD 15/8/5

epcos-ferrites-and-accessories-html.html
background image

543

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

SMD coil former with J terminals

Material:

GFR liquid crystal polymer (UL 94 V-0, insulation class to IEC 60085: 

F

 max. operating temperature 155 °C), color code black

Vectra C 130 

>

E83005 (M)

@

, TICONA

Solderability: to IEC 60068-2-58, test Td, method 6 (Group 3): 245 °C, 3 s
Resistance to soldering heat: to IEC 60068-2-58, test Td, method 6 (Group 3): 255 °C, 10 s

permissible soldering temperature for wire-wrap connection on coil former: 400 °C, 1 s

Winding:

see 

“Processing notes”

, page 179

Yoke

Material:

Stainless spring steel (0.25 mm)

Mounting:

Preferred assembly direction from the top

Cover plate

For marking and improved processing on assembly machines.

See under coil former for material and resistance to soldering heat.

Material:

Sumika Super E4008

®

>

E54705 (M)

@

, SUMITOMO CHEMICAL CO LTD

Coil former

Yoke

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Terminals

1

18.1

35.1

66.7

8

B66414B6008T001

Yoke (ordering code per piece, 2 are required)

B66414B2000X000

Cover plate

B66414A7000X000

Cover plate

B66414

Accessories

EFD 15/8/5

epcos-ferrites-and-accessories-html.html
background image

544

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

E core with flattened, lower center leg

for especially flat transformer design

For DC/DC converters

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 1.52 mm

–1

l

e

= 47 mm

A

e

= 31 mm

2

A

min

= 31 mm

2

V

e

= 1460 mm

3

Approx. weight

 7.2 g/set

Ungapped

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 1.40 mm

K3, K4: 50 nH < A

L

 < 410 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N49

910 +30/–20%

1100

< 0.29 ( 50 mT, 500 kHz, 100 °C)

B66417G0000X149

N87

1200 +30/–20%

1440

< 1.05 (200 mT, 100 kHz, 100 °C)

B66417G0000X187

N97

1250 +30/–20%

1510

< 0.80 (200 mT, 100 kHz, 100 °C)

B66417G0000X197

Material

A

L

 value

nH

P

e

g

approx. mm

Ordering code

N87

100

r

10%

120

0.49

B66417U0100K187

160 

r

10%

193

0.25

B66417U0160K187

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

61.1

–0.699

85.4

–0.796

75.7

–0.873

B66417

Core

EFD 20/10/7

epcos-ferrites-and-accessories-html.html
background image

545

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H

max. operating temperature 180 °C), color code black

Sumikon PM 9630

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 176

Squared pins.

Yoke

Material:

Stainless spring steel (0.3 mm)

Coil former

Yoke

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

1

28.1

40.2

49.2

8

B66418W1008D001

Yoke (ordering code per piece, 2 are required)

B66418B2000X000

View A

B66418

Accessories

EFD 20/10/7

epcos-ferrites-and-accessories-html.html
background image

546

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

E core with flattened, lower center leg

for especially flat transformer design

For DC/DC converters

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.98 mm

–1

l

e

= 57 mm

A

e

= 58 mm

2

A

min

= 57 mm

2

V

e

= 3310 mm

3

Approx. weight

 16.6 g/set

Ungapped

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 1.40 mm

K3, K4: 50 nH < A

L

 < 410 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N87

2000 +30/–20%

1560

< 1.8 (200 mT, 100 kHz, 100 °C)

B66421G0000X187

N97

2100 +30/–20%

1640

< 1.5 (200 mT, 100 kHz, 100 °C)

B66421G0000X197

Material

A

L

 value

nH

P

e

g

approx. mm

Ordering code

N87

160

r

10%

125

0.55

B66421U0160K187

250 

r

10%

195

0.30

B66421U0250K187

315 

r

10%

246

0.22

B66421U0315K187

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

103

–0.734

154

–0.796

138

–0.873

B66421

Core

EFD 25/13/9

epcos-ferrites-and-accessories-html.html
background image

547

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H

max.operating temperature 180 °C), color code black

Sumikon PM 9630

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 176

Squared pins.

Yoke

Material:

Stainless spring steel (0.4 mm)

Coil former

Yoke

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

 value

P:

Pins

1

40.7

50

42.3

10

B66422W1010D001

Yoke (ordering code per piece, 2 are required)

B66422B2000X000

View A

B66422

Accessories

EFD 25/13/9

epcos-ferrites-and-accessories-html.html
background image

548

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

E core with flattened, lower center leg

for especially flat transformer design

For DC/DC converters

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.99 mm

–1

l

e

= 68 mm

A

e

= 69 mm

2

A

min

= 69 mm

2

V

e

= 4690 mm

3

Approx. weight

 24 g/set

Ungapped

Gapped

The A

L

 value in the table applies to a core set comprising one ungapped core (dimension g = 0) and 

one gapped core (dimension g > 0).

Calculation factors 

(for formulas, see 

“E cores: general information”

, page 402)

Validity range:

K1, K2: 0.10 mm < s < 2.00 mm

K3, K4: 70 nH < A

L

 < 630 nH

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N87

2050 +30/–20%

1610

< 2.6 (200 mT, 100 kHz, 100 °C)

B66423G0000X187

N97

2150 +30/–20%

1690

< 2.2 (200 mT, 100 kHz, 100 °C)

B66423G0000X197

Material

A

L

 value

nH

P

e

g

approx. mm

Ordering code

N87

160

r

10%

125

0.71

B66423U0160K187

250 

r

10%

196

0.38

B66423U0250K187

315 

r

10%

246

0.27

B66423U0315K187

Material

Relationship between

air gap – A

L

 value

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C)

K4 (100 °C)

N87

125

–0.712

176

–0.796

161

–0.873

B66423

Core

EFD 30/15/9

epcos-ferrites-and-accessories-html.html
background image

549

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Coil former

Material:

GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

H

max. operating temperature 180 °C), color code black

Sumikon PM 9630

®

>

E41429 (M)

@

, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:

see 

“Processing notes”

, page 176

Squared pins.

Yoke

Material:

Stainless spring steel (0.45 mm)

Coil former

Yoke

Coil former

Ordering code

Sections

A

N

mm

2

l

N

mm

A

R

value

P:

Pins

1

52.3

56.7

37.3

12

B66424W1012D001

Yoke (ordering code per piece, 2 are required)

B66424B2000X000

View A

B66424

Accessories

EFD 30/15/9

epcos-ferrites-and-accessories-html.html
background image

550

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

For DC/DC converters, storage chokes

and EMI suppression chokes

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 1.4 mm

–1

l

e

= 38.7 mm

A

e

= 27.7 mm

2

A

min

= 25.8 mm

2

V

e

= 1070 mm

3

Approx. weight

 5.7 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

1150 

r

25%

1280

< 0.22 (200 mT,  25 kHz, 100 °C)

B66434G0000X127

N87

1250 

r

25%

1390

< 0.60 (200 mT, 100 kHz, 100 °C)

B66434G0000X187

N97

1300 

r

25%

1445

< 0.50 (200 mT, 100 kHz, 100 °C)

B66434G0000X197

B66434

Core

EV 15/9/7

EV cores

EV 15/9/7 through EV 30/16/3

epcos-ferrites-and-accessories-html.html
background image

551

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

For DC/DC converters, storage chokes

and EMI suppression chokes

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.8 mm

–1

l

e

= 59 mm

A

e

= 74 mm

2

A

min

= 73 mm

2

V

e

= 4370 mm

3

Approx. weight

 22 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

2400 +30/–20%

1520

< 0.80 (200 mT,  25 kHz, 100 °C)

B66408G0000X127

N87

2500 +30/–20%

1590

< 2.20 (200 mT, 100 kHz, 100 °C)

B66408G0000X187

N97

2600 +30/–20%

1650

< 2.05 (200 mT, 100 kHz, 100 °C)

B66408G0000X197

B66408

Core

EV 25/13/13

epcos-ferrites-and-accessories-html.html
background image

552

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

For DC/DC converters, storage chokes

and EMI suppression chokes

Delivery mode: single units

Magnetic characteristics

 (per set)

6

l

/

A = 0.76 mm

–1

l

e

= 74.8 mm

A

e

= 99 mm

2

A

min

= 95 mm

2

V

e

= 7410 mm

3

Approx. weight

 37 g/set

Ungapped

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

2600 +30/–20%

1570

< 1.4 (200 mT,  25 kHz, 100 °C)

B66432G0000X127

N87

2800 +30/–20%

1690

< 3.7 (200 mT, 100 kHz, 100 °C)

B66432G0000X187

N97

2900 +30/–20%

1750

< 3.0 (200 mT, 100 kHz, 100 °C)

B66432G0000X197

B66432

Core

EV 30/16/13

epcos-ferrites-and-accessories-html.html
background image

553

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1

Core shapes and materials

U cores of rectangular cross section and I cores are made of SIFERRIT materials N27 and N87. 
Owing to their high saturation flux density, high Curie temperature and low dissipation losses, they 
are suitable for power, pulse and high-voltage transformers. UU and UI cores are preferred for pow-
er ratings, since they can be combined in various ways (see illustration above) to produce trans-
formers in the kilowatt range.

2

Ordering, marking and delivery

U and I cores are supplied as single units, not as sets.

U cores with one shortened leg ( air gap) are available on request.

U and I cores are not marked.

3

A

L

 and core loss specification

The corresponding test results are tabulated separately for each core shape.

a) A

L

 value (see also 

“General – Definitions”

, page 127)

The A

L

 value is measured with a fully wound 100-turn coil at a flux density of

= 0.25 mT and a 

frequency of  f = 10 kHz. The temperature of the core is equal to room temperature.

b) Power loss P

V

The dissipation loss is specified in W/set. The data are maximum values under the specified 
measuring conditions. The flux density has been calculated on the basis of a sinusoidal voltage 
and is referred to the minimum cross-sectional area A

min

 of the core.

B

General information

U and UI cores

U and UI cores

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Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

For power transformers >1 kW (20 kHz)

Magnetic characteristics 

(per set)

U and I cores are supplied as single units. The A

L

 value in the table applies to a core set comprising 

two ungapped cores.

UU

93/152/16

UI

93/104/16

6

I

/

A

I

e

A

e

A

min

V

e

0.79

354

448

448

159000

0.58

258

448

448

116000

mm

–1

mm

mm

2

mm

2

mm

3

m

800

600

g/set

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

Combination UU 93/152/16

N27

2900 +30/–20%

1820

< 32 (200 mT, 25 kHz, 100 °C)

B67345B0003X027

N87

3100 +30/–20%

1950

< 14 (200 mT, 25 kHz, 100 °C)

B67345B0003X087

Combination UI 93/104/16

N27

3800 +30/–20%

1740

< 24 (200 mT, 25 kHz, 100 °C)

B67345B0003X027 (U)
B67345B0004X027 (I)

N87

4100 +30/–20%

1880

< 11 (200 mT, 25 kHz, 100 °C)

B67345B0003X087 (U)
B67345B0004X087 (I)

B67345

UI 93/104/16 cores

U 93/76/16 cores

U 93/76/16 through U 141/78/30

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04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

For power transformers >1 kW (20 kHz)

Magnetic characteristics 

(per set)

          

U and I cores are supplied as single units. The A

L

 value in the table applies to a core set comprising 

two ungapped cores.

UU

93/152/20

UI

93/104/20

6

I

/A

I

e

A

e

A

min

V

e

0.63

354

560

560

198000

0.46

258

560

560

144000

mm

–1

mm

mm

2

mm

2

mm

3

m

1000

750

g/set

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

Combination UU 93/152/20

N27

3600 +30/–20%

1800

< 11 (100 mT, 25 kHz, 100 °C)

B67345B0010X027

N87

3900 +30/–20%

1960

< 4 (100 mT, 25 kHz, 100 °C)

B67345B0010X087

Combination UI 93/104/20

N27

4900 +30/–20%

1790

< 8 (100 mT, 25 kHz, 100 °C)

B67345B0010X027 (U)
B67345B0011X027 (I)

N87

5300 +30/–20%

1950

< 3 (100 mT, 25 kHz, 100 °C)

B67345B0010X087 (U)
B67345B0011X087 (I)

B67345

UI 93/104/20 cores

U 93/76/20 cores

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556

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

For power transformers >1 kW (20 kHz)

Magnetic characteristics 

(per set)

U and I cores are supplied as single units. The A

L

 value in the table applies to a core set comprising 

two ungapped cores.

UU

93/152/30

UI

93/104/30

6

I

/

A

I

e

A

e

A

min

V

e

0.42

354

840

840

297000

0.31

258

840

840

217000

mm

–1

mm

mm

2

mm

2

mm

3

m

1500

1100

g/set

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

Combination UU 93/152/30

N27

5400 +30/–20%

1800

< 16 (100 mT, 25 kHz, 100 °C)

B67345B0001X027

N87

5700 +30/–20%

1900

< 5.5 (100 mT, 25 kHz, 100 °C)

B67345B0001X087

N97

5700 +30/–20%

1900

< 4 (100 mT, 25 kHz, 100 °C)

B67345B0001X097

Combination UI 93/104/30

N27

7400 +30/–20%

1850

< 12 (100 mT, 25 kHz, 100 °C)

B67345B0001X027 (U)
B67345B0002X027 (I)

N87

7900 +30/–20%

1930

< 4 (100 mT, 25 kHz, 100 °C)

B67345B0001X087 (U)
B67345B0002X087 (I)

B67345

UI 93/104/30 cores

U 93/76/30 cores

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Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Magnetic characteristics 

(per set)

6

l

/

A = 0.44 mm

–1

l

e

= 368 mm

A

e

= 840 mm

2

A

min

= 840 mm

2

V

e

= 310800 mm

3

Approx. weight

 1600 g/set

U cores are supplied as single units. The A

L

 value in the table applies to a core set comprising two 

ungapped cores.

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

4600 +30/–20%

1580

< 16.5 (100 mT, 25 kHz, 100 °C)

B67370A0002X027

N87

5700 +30/–20%

1990

< 6 (100 mT, 25 kHz, 100 °C)

B67370A0002X187

N97

5900 +30/–20%

2060

< 4.2 (100 mT, 25 kHz, 100 °C)

B67370A0002X197

B67370

Core

U 101/76/30

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558

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

For power transformers >1 kW (20 kHz)

Magnetic characteristics 

(per set)

U and I cores are supplied as single units. The A

L

 value in the table applies to a core set comprising 

two ungapped cores.

UU

126/182/20

UI

126/119/20

6

I

/

A

I

e

A

e

A

min

V

e

0.86

480

560

560

269000

0.63

354

560

560

198000

mm

–1

mm

mm

2

mm

2

mm

3

m

1300

950

g/set

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

Combination UU 126/182/20

N87

3000 

r

25%

2000

<  4.7 (100 mT, 25 kHz, 100 °C)

B67385G0000X187

Combination UI 126/119/20

N87

3900 

r

25%

1950

< 3.4 (100 mT, 25 kHz, 100 °C)

B67385G0000X187 (U)
B67385P0000X187 (I)

B67385

UI 126/119/20 cores

U 126/91/20 cores

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559

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Magnetic characteristics 

(per set)

6

l

/

A = 0.28 mm

–1

l

e

= 377 mm

A

e

= 1350 mm

2

A

min

= 1350 mm

2

V

e

= 508950 mm

3

Approx. weight

 2500 g/set

U cores are supplied as single units. The A

L

 value in the table applies to a core set comprising two 

ungapped cores.

    

Material

A

L

 value

nH

P

e

P

V

W/set

Ordering code

N27

7500 

r

30%

1670

< 22 (100 mT, 25 kHz, 100 °C)

B67374G0000X127

N87

8900 

r

30%

1970

< 10 (100 mT, 25 kHz, 100 °C)

B67374G0000X187

N97

8400 

r

30%

1870

< 3.3 (100 mT, 25 kHz, 100 °C)

B67374G0000X197

B67374

Core

U 141/78/30

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Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

For combination with large volume E, U cores

when sides ground (on request)

For wireless application

Various thickness possible

Type of delivery

Pieces

    

Material

A

mm

B

mm

C – optional

mm

Approx. weight

g

Ordering code

N87

155 

r

2.0

110 

r

2.0

23

.0

r

1.0

1)

1900

B67410A0107X087

100 

r

1.5

20 

r

0.3

40

.0

r

0.5

2)*)

390

B67410A0105X087

N95

100 

r

2.0

100 

r

2.0

5

.0

r

0.4

3)*)

240

B67410A0218X195

N27

30 

r

0.5

28 

r

0.5

46.5 

r

0.9

4)

190

B67345B0007X027

1) Optional height up to 30 mm.
2) Optional height up to 45 mm.
3) Optional height up to 35 mm.
4) Optional height up to 50 mm.
*) Thickness C is ground.

B67410

B67345

Ferrite blocks

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Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Our product line includes a wide range of toroids with finely graded diameters ranging from 2.5 to 
202 mm.

Other core heights can be supplied on request. All cores are available in the usual materials.

Applications

Toroids are primarily used as EMC chokes for suppressing RF interference in the MHZ region 
and in signal transformers.

Typical applications for toroids of NiZn ferrites are LAN chokes. One of the materials available 
for this purpose is K10; other materials on request.

The following high-permeability MnZn materials are available for interference suppression:

– R 2.5 through R 12.5 for telecommunications, e.g. ISDN (N30, T38, T46)

– R 13.3 through R 26 for power line chokes (N30, T65, T35, T37, T38)
– >R 34 for chokes and filters in industrial use (T65)

Toroids are also increasingly used for power applications. Here, the typical values for amplitude 
permeability and power loss, as summarized in the section on “

SIFERRIT Materials

” (page 33), 

are applicable to the special power materials.

Coating

Toroids are available in different coating versions, thus offering the appropriate solution for every 
application. The coating not only offers protection for the edges but also provides an insulation func-
tion.

For small ring cores, we have introduced a parylene coating which features a low coating thickness 
and high dielectric strength.

Coatings of ring cores

Version

Epoxy

(blue)

Parylene

(transparent)

Main application

Medium/big sizes (

t

 R 9.53) 

Small sizes (< R 9.53)

Layer thickness

< 0.4 mm

0.012 or 0.025 mm

Breakdown voltage

(minimum values)

> 1.0 kV (for R 9.53; R 10)

> 1.5 kV (for R 12.5 thru R 20)

> 2.0 kV (for > R 20)

> 1 kV

(standard value)

Mechanical quality

High firmness

Smooth surface

Maximum temperature (short-time) approx. 180

q

C

approx. 130

q

C

Advantage

Low influence on A

L

 value

Very low thickness

UL rating

UL 94 V-0

UL 94 V-0

UL file number

E194412

E194412

Ordering code

B64290

L

B64290

P

General information

Toroids (ring cores)

Toroids (ring cores)

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Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Dielectric strength test

The following test setup is used to test the dielectric strength of the insulating coating: A copper ring 
is pressed to the top edge of the ring. It touches the ferrite ring at the edges (see diagram).

The test duration is 2 seconds.

Chamfer

Large toroidal cores use thick wires that are partially subjected to high mechanical stress during 
winding. This can damage the wire insulation as well as the coating of the cores, thus reducing the 
breakdown voltage. To avoid this, EPCOS toroids have a chamfer. This prevents any insulation 
damage, and produces uniform coating thickness at the same time.

Compilation of the ordering code

Ferrite ring

Metal poles

V

rms

<KI&'(-#)

Core size

Design

Small

Edges rounded by tumbling

Medium

Chamfer on edges and/or radius on the surface

Medium/big

Chamfer on edges

B 6 4 2 9 0 L

6 6 8 X

3 8

Block 1

Block 2

Block 3

Ferrite toroid

Coating material

Type (size)

coded

Parylene

P

Epoxy

L

Uncoated

A

X = Dummy character

Code number for material
(exception: material N30 = 830)

0

0

General information

Toroids (ring cores)

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Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Overview of available sizes

Type

Type code

(ordering code,

block 2)

Page

Toroid size (d

a

u

d

i

u

h)

mm

inch

R 2.50

u

1.50

u

1.00

R 0.098

u

0.059

u

0.039

P0035

565

R 2.50

u

1.50

u

1.30

R 0.098

u

0.059

u

0.051

P0072

565

R 2.54

u

1.27

u

1.27

R 0.100

u

0.050

u

0.050

P0734

566

R 3.05

u

1.27

u

1.27

R 0.120

u

0.050

u

0.050

P0683

566

R 3.05

u

1.27

u

2.54

R 0.120

u

0.050

u

0.100

P0739

567

R 3.05

u

1.78

u

2.03

R 0.120

u

0.070

u

0.080

P0733

567

R 3.43

u

1.78

u

1.78

R 0.135

u

0.070

u

0.070

P0731

568

R 3.43

u

1.78

u

2.03

R 0.135

u

0.070

u

0.080

P0745

568

R 3.43

u

1.78

u

2.11

R 0.135

u

0.070

u

0.083

P0709

569

R 3.94

u

1.78

u

1.78

R 0.155

u

0.070

u

0.070

P0732

569

R 3.94

u

2.24

u

1.30

R 0.155

u

0.088

u

0.051

P0061

570

R 3.94

u

2.24

u

2.30

R 0.155

u

0.088

u

0.090

P0723

570

R 4.00

u

2.40

u

1.60

R 0.157

u

0.094

u

0.063

P0036

571

R 4.00

u

2.40

u

1.80

R 0.157

u

0.094

u

0.071

P0692

571

R 5.84

u

3.05

u

1.52

R 0.230

u

0.120

u

0.060

P0056

572

R 5.84

u

3.05

u

3.00

R 0.230

u

0.120

u

0.118

P0687

572

R 6.30

u

3.80

u

2.50

R 0.248

u

0.150

u

0.098

P0037

573

R 8.00

u

4.00

u

4.00

R 0.315

u

0.158

u

0.158

P0751

573

R 9.53

u

4.75

u

3.17

R 0.375

u

0.187

u

0.125

L0062

574

R 10.0

u

6.00

u

4.00

R 0.394

u

0.236

u

0.157

L0038

574

R 10.0

u

6.00

u

7.00

R 0.394

u

0.236

u

0.318

L0783

575

R 12.5

u

7.50

u

5.00

R 0.492

u

0.295

u

0.197

L0044

575

R 12.7

u

7.90

u

6.35

R 0.500

u

0.311

u

0.250

L0742

576

R 13.3

u

8.30

u

5.00

R 0.524

u

0.327

u

0.197

L0644

576

R 14.0

u

9.00

u

5.00

R 0.551

u

0.354

u

0.197

L0658

577

R 15.0

u

10.4

u

5.30

R 0.591

u

0.409

u

0.209

L0623

577

R 15.8

u

8.90

u

4.70

R 0.622

u

0.350

u

0.185

L0743

578

R 16.0

u

9.60

u

6.30

R 0.630

u

0.378

u

0.248

L0045

578

B64290

Overview

Toroids (ring cores)

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Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Overview of available sizes 

(continued)

Type

Type code

(ordering code,

block 2)

Page

Toroid size (d

a

u

d

i

u

h)

mm

inch

R 17.0

u

10.7

u

6.80

R 0.669

u

0.421

u

0.268

L0652

579

R 18.4

u

5.90

u

5.90

R 0.724

u

0.232

u

0.232

L0697

579

R 20.0

u

10.0

u

7.00

R 0.787

u

0.394

u

0.276

L0632

580

R 22.1

u

13.7

u

6.35

R 0.870

u

0.539

u

0.250

L0638

580

R 22.1

u

13.7

u

7.90

R 0.870

u

0.539

u

0.311

L0719

581

R 22.1

u

13.7

u

12.5

R 0.870

u

0.539

u

0.492

L0651

581

R 22.6

u

14.7

u

9.20

R 0.890

u

0.579

u

0.362

L0626

582

R 25.3

u

14.8

u

10.0

R 0.996

u

0.583

u

0.394

L0618

582

R 25.3

u

14.8

u

15.0

R 0.996

u

0.583

u

0.590

L0615

583

R 25.3

u

14.8

u

20.0

R 0.996

u

0.583

u

0.787

L0616

583

R 29.5

u

19.0

u

14.9

R 1.142

u

0.748

u

0.587

L0647

584

R 30.5

u

20.0

u

12.5

R 1.201

u

0.787

u

0.492

L0657

584

R 34.0

u

20.5

u

10.0

R 1.339

u

0.807

u

0.394

L0058

585

R 34.0

u

20.5

u

12.5

R 1.339

u

0.807

u

0.492

L0048

585

R 36.0

u

23.0

u

15.0

R 1.417

u

0.906

u

0.591

L0674

586

R 38.1

u

19.05

u

12.7

R 1.500

u

0.750

u

0.500

L0668

586

R 40.0

u

24.0

u

16.0

R 1.575

u

0.945

u

0.630

L0659

587

R 41.8

u

26.2

u

12.5

R 1.646

u

1.031

u

0.492

L0022

587

R 50.0

u

30.0

u

20.0

R 1.969

u

1.181

u

0.787

L0082

588

R 58.3

u

32.0

u

18.0

R 2.295

u

1.260

u

0.709

L0043

588

R 58.3

u

40.8

u

17.6

R 2.295

u

1.606

u

0.693

L0040

589

R 58.3

u

40.8

u

20.2

R 2.295

u

1.606

u

0.795

L0042

589

R 63.0

u

38.0

u

25.0

R 2.480

u

1.496

u

0.984

L0699

590

R 68.0

u

48.0

u

13.0

R 2.677

u

1.890

u

0.512

L0696

590

R 87.0

u

54.3

u

13.5

R 3.425

u

2.138

u

0.531

L0730

591

R 102

u

65.8

u

15.0

R 4.016

u

2.591

u

0.591

L0084

591

R 140

u

103

u

25.0

R 5.512

u

4.055

u

0.984

A0705

592

R 202

u

153

u

25.0

R 7.953

u

6.024

u

0.984

A0711

592

B64290

Overview

Toroids (ring cores)

epcos-ferrites-and-accessories-html.html
background image

565

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Parylene coating

R 2.50

u

1.50

u

1.00 (mm)

R 0.098

u

0.059

u

0.039 (inch)

Dimensions

Characteristics and ordering codes

Parylene coating

R 2.50

u

1.50

u

1.30 (mm)

R 0.098

u

0.059

u

0.051 (inch)

Dimensions

Characteristics and ordering codes

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

2.50

r

0.12

1.50

r

0.1

1.00

r

0.1

0.098

r

0.005

0.059

r

0.004

0.039

r

0.004

uncoated

1)

Coating thickness 0.017 mm

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

70

r

25%

700

B64290P0035X010

12.30

6.02

0.49

3.00

0.02

T57

410

r

25%

4000

B64290P0035X057

N30

440

r

25%

4300

B64290P0035X830

T65

470

r

30%

4600

B64290P0035X065

T38

1020

r

30%

10000

B64290P0035X038

T46

1530

r

30%

15000

B64290P0035X046

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

2.50

r

0.12

1.50

r

0.1

1.30

r

0.12

0.098

r

0.005

0.059

r

0.004

0.051

r

0.005

uncoated

1)

Coating thickness 0.017 mm

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

93

r

25%

700

B64290P0072X010

9.41

6.02

0.64

3.85

0.02

T57

530

r

25%

4000

B64290P0072X057

T65

600

r

30%

4600

B64290P0072X065

T38

1320

r

30%

10000

B64290P0072X038

T46

2000

r

30%

15000

B64290P0072X046

B64290P0035

B64290P0072

R 2.5 through R 202

R 2.50

u

1.50

u

1.30

R 2.50

u

1.50

u

1.00

epcos-ferrites-and-accessories-html.html
background image

566

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Parylene coating

R 2.54

u

1.27

u

1.27 (mm)

R 0.100

u

0.050

u

0.050 (inch)

Dimensions

Characteristics and ordering codes

Parylene coating

R 3.05

u

1.27

u

1.27 (mm)

R 0.120

u

0.050

u

0.050 (inch)

Dimensions

Characteristics and ordering codes

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

2.54

r

0.12

1.27

r

0.12

1.27

r

0.12

0.100

r

0.005

0.050

r

0.005

0.050

r

0.005

uncoated

1)

Coating thickness 0.017 mm

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

120

r

25%

700

B64290P0734X010

7.18

5.53

0.77

4.29

0.03

T57

690

r

25%

3900

B64290P0734X057

T65

800

r

30%

4500

B64290P0734X065

T38

1760

r

30%

10000

B64290P0734X038

T46

2640

r

30%

15000

B64290P0734X046

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

3.05

r

0.12

1.27

r

0.12

1.27

r

0.12

0.120

r

0.005

0.050

r

0.005

0.050

r

0.005

uncoated

1)

Coating thickness 0.017 mm

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

160

r

25%

700

B64290P0683X010

5.65

5.99

1.06

6.4

0.04

T57

830

r

25%

3700

B64290P0683X057

T65

1000

r

30%

4500

B64290P0683X065

T38

2200

r

30%

9900

B64290P0683X038

T46

3340

r

30%

15000

B64290P0683X046

B64290P0734

B64290P0683

R 3.05

u

1.27

u

1.27

R 2.54

u

1.27

u

1.27

epcos-ferrites-and-accessories-html.html
background image

567

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Parylene coating

R 3.05

u

1.27

u

2.54 (mm)

R 0.120

u

0.050

u

0.100 (inch)

Dimensions

Characteristics and ordering codes

Parylene coating

R 3.05

u

1.78

u

2.03 (mm)

R 0.120

u

0.070

u

0.080 (inch)

Dimensions

Characteristics and ordering codes

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

3.05

r

0.12

1.27

r

0.12

2.54

r

0.12

0.120

r

0.005

0.050

r

0.005

0.100

r

0.005

uncoated

1)

Coating thickness 0.017 mm

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

330

r

25%

700

B64290P0739X010

2.82

5.99

2.12

12.7

0.08

T57

1700

r

25%

3800

B64290P0739X057

T65

2000

r

30%

4500

B64290P0739X065

T38

4200

r

30%

9400

B64290P0739X038

T46

6500

r

30%

15000

B64290P0739X046

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

3.05

r

0.12

1.78

r

0.12

2.03

r

0.12

0.120

r

0.005

0.070

r

0.005

0.080

r

0.005

uncoated

1)

Coating thickness 0.017 mm

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

160

r

25%

700

B64290P0733X010

5.75

7.23

1.26

9.10

0.06

T57

870

r

25%

4000

B64290P0733X057

T65

1000

r

30%

4600

B64290P0733X065

T38

2150

r

30%

9900

B64290P0733X038

T46

3250

r

30%

15000

B64290P0733X046

B64290P0739

B64290P0733

R 3.05

u

1.78

u

2.03

R 3.05

u

1.27

u

2.54

epcos-ferrites-and-accessories-html.html
background image

568

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Parylene coating

R 3.43

u

1.78

u

1.78 (mm)

R 0.135

u

0.070

u

0.070 (inch)

Dimensions

Characteristics and ordering codes

Parylene coating

R 3.43

u

1.78

u

2.03 (mm)

R 0.135

u

0.070

u

0.080 (inch)

Dimensions

Characteristics and ordering codes

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

3.43

r

0.12

1.78

r

0.12

1.78

r

0.12

0.135

r

0.005

0.070

r

0.005

0.070

r

0.005

uncoated

1)

Coating thickness 0.017 mm

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

160

r

25%

700

B64290P0731X010

5.38

7.63

1.42

10.7

0.06

T57

930

r

25%

4000

B64290P0731X057

T65

1050

r

30%

4500

B64290P0731X065

T38

2300

r

30%

10000

B64290P0731X038

T46

3400

r

30%

15000

B64290P0731X046

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

3.43

r

0.12

1.78

r

0.12

2.03

r

0.12

0.135

r

0.005

0.070

r

0.005

0.080

r

0.005

uncoated

1)

Coating thickness 0.017 mm

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

190

r

25%

700

B64290P0745X010

4.72

7.63

1.62

12.2

0.07

T57

1060

r

25%

4000

B64290P0745X057

T65

1200

r

30%

4500

B64290P0745X065

T38

2650

r

30%

10000

B64290P0745X038

T46

4000

r

30%

15000

B64290P0745X046

B64290P0731

B64290P0745

R 3.43

u

1.78

u

2.03

R 3.43

u

1.78

u

1.78

epcos-ferrites-and-accessories-html.html
background image

569

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Parylene coating

R 3.43

u

1.78

u

2.11 (mm)

R 0.135

u

0.070

u

0.083 (inch)

Dimensions

Characteristics and ordering codes

Parylene coating

R 3.94

u

1.78

u

1.78 (mm)

R 0.155

u

0.070

u

0.070 (inch)

Dimensions

Characteristics and ordering codes

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

3.43

r

0.12

1.78

r

0.12

2.11

r

0.12

0.135

r

0.005

0.070

r

0.005

0.083

r

0.005

uncoated

1)

Coating thickness 0.017 mm

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

200

r

25%

700

B64290P0709X010

4.54

7.63

1.68

12.7

0.07

T57

1100

r

25%

4000

B64290P0709X057

T65

1300

r

30%

4700

B64290P0709X065

T38

2770

r

30%

10000

B64290P0709X038

T46

4000

r

30%

15000

B64290P0709X046

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

3.94

r

0.12

1.78

r

0.12

1.78

r

0.12

0.155

r

0.005

0.070

r

0.005

0.070

r

0.005

uncoated

1)

Coating thickness 0.017 mm

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

200

r

25%

700

B64290P0732X010

4.44

8.10

1.82

14.8

0.08

T57

1100

r

25%

3900

B64290P0732X057

T65

1350

r

30%

4800

B64290P0732X065

T38

2830

r

30%

10000

B64290P0732X038

T46

4200

r

30%

15000

B64290P0732X046

B64290P0709

B64290P0732

R 3.94

u

1.78

u

1.78

R 3.43

u

1.78

u

2.11

epcos-ferrites-and-accessories-html.html
background image

570

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Parylene coating

R 3.94

u

2.24

u

1.30 (mm)

R 0.155

u

0.088

u

0.051 (inch)

Dimensions

Characteristics and ordering codes

Parylene coating

R 3.94

u

2.24

u

2.30 (mm)

R 0.155

u

0.088

u

0.090 (inch)

Dimensions

Characteristics and ordering codes

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

3.94

r

0.12

2.24

r

0.12

1.30

r

0.12

0.155

r

0.005

0.088

r

0.005

0.051

r

0.005

uncoated

1)

Coating thickness 0.017 mm

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

100

r

25%

700

B64290P0061X010

8.56

9.21

1.08

9.90

0.05

T57

550

r

25%

3800

B64290P0061X057

T65

700

r

30%

4800

B64290P0061X065

T38

1470

r

30%

10000

B64290P0061X038

T46

2200

r

30%

15000

B64290P0061X046

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

3.94

r

0.12

2.24

r

0.12

2.30

r

0.15

0.155

r

0.005

0.088

r

0.005

0.090

r

0.006

uncoated

1)

Coating thickness 0.017 mm

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

180

r

25%

700

B64290P0723X010

4.85

9.21

1.90

17.5

0.09

T57

990

r

25%

3800

B64290P0723X057

T65

1200

r

30%

4800

B64290P0723X065

T38

2600

r

30%

10000

B64290P0723X038

T46

3890

r

30%

15000

B64290P0723X046

B64290P0061

B64290P0723

R 3.94

u

2.24

u

2.30

R 3.94

u

2.24

u

1.30

epcos-ferrites-and-accessories-html.html
background image

571

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Parylene coating

R 4.00

u

2.40

u

1.60 (mm)

R 0.157

u

0.094

u

0.063 (inch)

Dimensions

Characteristics and ordering codes

Parylene coating

R 4.00

u

2.40

u

1.80 (mm)

R 0.157

u

0.094

u

0.071 (inch)

Dimensions

Characteristics and ordering codes

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

4.00

r

0.12

2.40

r

0.12

1.60

r

0.1

0.157

r

0.005

0.094

r

0.004

0.063

r

0.004

uncoated

1)

Coating thickness 0.017 mm

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N30

700

r

25%

4300

B64290P0036X830

7.7

9.63

1.25

12.0

0.05

T65

750

r

30%

4600

B64290P0036X065

T38

1630

r

30%

10000

B64290P0036X038

T46

2450

r

30%

15000

B64290P0036X046

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

4.00

r

0.12

2.40

r

0.12

1.80

r

0.12

0.157

r

0.005

0.094

r

0.004

0.071

r

0.005

uncoated

1)

Coating thickness 0.017 mm

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N30

790

r

25%

4300

B64290P0692X830

6.83

9.63

1.41

13.6

0.07

T65

840

r

30%

4600

B64290P0692X065

T38

1840

r

30%

10000

B64290P0692X038

T46

2760

r

30%

15000

B64290P0692X046

B64290P0036

B64290P0692

R 4.00

u

2.40

u

1.80

R 4.00

u

2.40

u

1.60

epcos-ferrites-and-accessories-html.html
background image

572

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Parylene coating

R 5.84

u

3.05

u

1.52 (mm)

R 0.230

u

0.120

u

0.060 (inch)

Dimensions

Characteristics and ordering codes

Parylene coating

R 5.84

u

3.05

u

3.00 (mm)

R 0.230

u

0.120

u

0.118 (inch)

Dimensions

Characteristics and ordering codes

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

5.84

r

0.12

3.05

r

0.12

1.52

r

0.12

0.230

r

0.005

0.120

r

0.005

0.060

r

0.005

uncoated

1)

Coating thickness 0.017 mm

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N30

850

r

25%

4300

B64290P0056X830

6.36

13.03

2.05

26.7

0.15

T65

1020

r

30%

4600

B64290P0056X065

T38

1900

r

30%

10000

B64290P0056X038

T46

2900

r

30%

15000

B64290P0056X046

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

5.84

r

0.12

3.05

r

0.12

3.00

r

0.15

0.230

r

0.005

0.120

r

0.005

0.118

r

0.005

uncoated

1)

Coating thickness 0.017 mm

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N30

1680

r

25%

4300

B64290P0687X830

3.22

13.03

4.04

52.6

0.3

T65

1800

r

30%

4600

B64290P0687X065

T38

3900

r

30%

10000

B64290P0687X038

T46

5850

r

30%

15000

B64290P0687X046

B64290P0056

B64290P0687

R 5.84

u

3.05

u

3.00

R 5.84

u

3.05

u

1.52

epcos-ferrites-and-accessories-html.html
background image

573

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Parylene coating

R 6.30

u

3.80

u

2.50 (mm)

R 0.248

u

0.150

u

0.098 (inch)

Dimensions

Characteristics and ordering codes

Parylene coating

R 8.00

u

4.00

u

4.00 (mm)

R 0.315

u

0.158

u

0.158 (inch)

Dimensions

Characteristics and ordering codes

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

6.30

r

0.15

3.80

r

0.12

2.50

r

0.12

0.248

r

0.006

0.150

r

0.005

0.098

r

0.005

uncoated

1)

Coating thickness 0.017 mm

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K1

20

r

25%

80

B64290P0037X001

4.97

15.21

3.06

46.5

0.2

N87

560

r

25%

2200

B64290P0037X087

N30

1090

r

25%

4300

B64290P0037X830

T65

1160

r

30%

4600

B64290P0037X065

T38

2530

r

30%

10000

B64290P0037X038

T46

3600

r

30%

14000

B64290P0037X046

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

8.00

r

0.18

4.00

r

0.12

4.00

r

0.12

0.315

r

0.007

0.158

r

0.005

0.158

r

0.005

uncoated

1)

Coating thickness 0.017 mm

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

1200

r

25%

2200

B64290P0751X087

2.26

17.42

7.70

134

0.7

N30

2400

r

25%

4300

B64290P0751X830

T65

2550

r

30%

4600

B64290P0751X065

T38

5500

r

30%

10000

B64290P0751X038

T46

8000

r

30%

15000

B64290P0751X046

B64290P0037

B64290P0751

R 8.00

u

4.00

u

4.00

R 6.30

u

3.80

u

2.50

epcos-ferrites-and-accessories-html.html
background image

574

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Epoxy coating

R 9.53

u

4.75

u

3.17 (mm)

R 0.375

u

0.187

u

0.125 (inch)

Dimensions

Characteristics and ordering codes

Epoxy coating

R 10.0

u

6.00

u

4.00 (mm)

R 0.394

u

0.236

u

0.157 (inch)

Dimensions

Characteristics and ordering codes

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

9.53

r

0.19

4.75

r

0.12

3.17

r

0.15

0.375

r

0.007

0.187

r

0.005

0.125

r

0.006

uncoated

1)

10.5 max.

3.8 min.

4.1 max.

0.413 max.

0.130 min.

0.161 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

970

r

25%

2200

B64290L0062X087

2.85

20.72

7.28

151

0.8

N30

1900

r

25%

4300

B64290L0062X830

T65

2050

r

30%

4600

B64290L0062X065

T35

2650

r

25%

6000

B64290L0062X035

T38

4410

r

30%

10000

B64290L0062X038

T46

6400

r

30%

15000

B64290L0062X046

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

10.0

r

0.2

6.0

r

0.15

4.00

r

0.15

0.394

r

0.008

0.236

r

0.006

0.157

r

0.006

uncoated

1)

10.8 max.

5.25 min.

4.75 max.

0.433 max.

0.199 min.

0.195 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N49

610

r

25%

1500

B64290L0038X049

3.07

24.07

7.83

188

0.9

N87

900

r

25%

2200

B64290L0038X087

N30

1760

r

25%

4300

B64290L0038X830

T65

1900

r

30%

4700

B64290L0038X065

T35

2460

r

25%

6000

B64290L0038X035

T37

2660

r

25%

6500

B64290L0038X037

T38

4090

r

30%

10000

B64290L0038X038

T46

6000

r

30%

15000

B64290L0038X046

 B64290L0062

 B64290L0038

R 10.0

u

6.00

u

4.00

R 9.53

u

4.75

u

3.17

epcos-ferrites-and-accessories-html.html
background image

575

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Epoxy coating

R 10.0

u

6.00

u

7.00 (mm)

R 0.394

u

0.236

u

0.318 (inch)

Dimensions

Characteristics and ordering codes

Epoxy coating

R 12.5

u

7.50

u

5.00 (mm)

R 0.492

u

0.295

u

0.197 (inch)

Dimensions

Characteristics and ordering codes

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

10.0

r

0.2

6.0

r

0.15

7.00

r

0.15

0.394

r

0.008

0.236

r

0.006

0.275

r

0.006

uncoated

1)

10.8 max.

5.25 min.

7.75 max.

0.433 max.

0.199 min.

0.318 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

450

r

25%

630

B64290L0783X010

1.76

24.07

13.7

330

1.7

N30

3070

r

25%

4300

B64290L0783X830

T65

3360

r

30%

4700

B64290L0783X065

T38

7150

r

30% 10000

B64290L0783X038

T46

10700

r

30% 15000

B64290L0783X046

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

12.5

r

0.3

7.5

r

0.2

5.00

r

0.15

0.492

r

0.012

0.295

r

0.008

0.197

r

0.005

uncoated

1)

13.6 max.

6.5 min.

5.95 max.

0.535 max.

0.256 min.

0.234 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N49

660

r

25%

1300

B64290L0044X049

2.46

30.09

12.23

368

1.8

N87

1120

r

25%

2200

B64290L0044X087

N30

2200

r

25%

4300

B64290L0044X830

T65

2400

r

30%

4700

B64290L0044X065

T35

3060

r

25%

6000

B64290L0044X035

T37

3320

r

25%

6500

B64290L0044X037

T38

5110

r

30%

10000

B64290L0044X038

B64290L0783

B64290L0044

R 12.5

u

7.50

u

5.00

R 10.0

u

6.00

u

7.00

epcos-ferrites-and-accessories-html.html
background image

576

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Epoxy coating

R 12.7

u

7.90

u

6.35 (mm)

R 0.500

u

0.311

u

0.250 (inch)

Dimensions

Characteristics and ordering codes

Epoxy coating

R 13.3

u

8.30

u

5.00 (mm)

R 0.524

u

0.327

u

0.197 (inch)

Dimensions

Characteristics and ordering codes

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

12.7

r

0.3

7.9

r

0.25

6.35

r

0.2

0.500

r

0.012

0.311

r

0.010

0.250

r

0.008

uncoated

1)

13.6 max.

7.10 min.

7.15 max.

0.535 max.

0.281 min.

0.281 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

1330

r

25%

2200

B64290L0742X087

2.08

31.17

14.96

466

2.4

N30

2600

r

25%

4300

B64290L0742X830

T65

2850

r

30%

4700

B64290L0742X065

T35

3620

r

25%

6000

B64290L0742X035

T37

3920

r

25%

6500

B64290L0742X037

T38

6030

r

30%

10000

B64290L0742X038

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

13.3

r

0.3

8.3

r

0.3

5.00

r

0.15

0.524

r

0.012

0.327

r

0.012

0.197

r

0.005

uncoated

1)

14.4 max.

7.2 min.

5.95 max.

0.567 max.

0.283 min.

0.234 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

1040

r

25%

2200

B64290L0644X087

2.67

32.70

12.27

401

1.8

N30

2030

r

25%

4300

B64290L0644X830

T65

2300

r

30%

4900

B64290L0644X065

T35

2830

r

25%

6000

B64290L0644X035

T37

3060

r

25%

6500

B64290L0644X037

T38

4700

r

30%

10000

B64290L0644X038

B64290L0742

B64290L0644

R 13.3

u

8.30

u

5.00

R 12.7

u

7.90

u

6.35

epcos-ferrites-and-accessories-html.html
background image

577

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Epoxy coating

R 14.0

u

9.00

u

5.00 (mm)

R 0.551

u

0.354

u

0.197 (inch)

Dimensions

Characteristics and ordering codes

Epoxy coating

R 15.0

u

10.4

u

5.30 (mm)

R 0.591

u

0.409

u

0.209 (inch)

Dimensions

Characteristics and ordering codes

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

14.0

r

0.3

9.0

r

0.25

5.00

r

0.2

0.551

r

0.012

0.354

r

0.012

0.197

r

0.008

uncoated

1)

15.1 max.

7.95 min.

6.0 max.

0.594 max.

0.313 min.

0.236 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

970

r

25%

2200

B64290L0658X087

2.84

34.98

12.30

430

2.0

N30

1900

r

25%

4300

B64290L0658X830

T65

2300

r

30%

5200

B64290L0658X065

T35

2650

r

25%

6000

B64290L0658X035

T37

2880

r

25%

6500

B64290L0658X037

T38

4420

r

30%

10000

B64290L0658X038

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

15.0

r

0.5

10.4

r

0.4

5.30

r

0.3

0.591

r

0.020

0.409

r

0.016

0.209

r

0.012

uncoated

1)

16.3 max.

9.2 min.

6.4 max.

0.642 max.

0.362 min.

0.252 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

850

r

25%

2200

B64290L0623X087

3.24

39.02

12.05

470

2.4

N30

1670

r

25%

4300

B64290L0623X830

T65

2020

r

30%

5200

B64290L0623X065

T35

2330

r

25%

6000

B64290L0623X035

T37

2520

r

25%

6500

B64290L0623X037

T38

3880

r

30%

10000

B64290L0623X038

B64290L0658

B64290L0623

R 15.0

u

10.4

u

5.30

R 14.0

u

9.00

u

5.00

epcos-ferrites-and-accessories-html.html
background image

578

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Epoxy coating

R 15.8

u

8.90

u

4.70 (mm)

R 0.622

u

0.350

u

0.185 (inch)

Dimensions

Characteristics and ordering codes

Epoxy coating

R 16.0

u

9.60

u

6.30 (mm)

R 0.630

u

0.378

u

0.248 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 0.45 W/core

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

15.8

r

0.38

8.9

r

0.25

4.70

r

0.13

0.622

r

0.015

0.350

r

0.010

0.185

r

0.005

uncoated

1)

16.8 max.

8.05 min.

5.45 max.

0.661 max.

0.317 min.

0.215 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

1190

r

25%

2200

B64290L0743X087

2.33

36.75

15.78

580

3.0

N30

2320

r

25%

4300

B64290L0743X830

T65

2800

r

30%

5200

B64290L0743X065

T35

3240

r

25%

6000

B64290L0743X035

T37

3500

r

25%

6500

B64290L0743X037

T38

5400

r

30%

10000

B64290L0743X038

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

16.0

r

0.4

9.6

r

0.3

6.30

r

0.2

0.630

r

0.016

0.378

r

0.012

0.248

r

0.008

uncoated

1)

17.2 max.

8.5 min.

7.3 max.

0.677 max.

0.335 min.

0.287 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

1420

r

25%

2200

B64290L0045X087

1.95

38.52

19.73

760

3.7

N30

2770

r

25%

4300

B64290L0045X830

T65

3350

r

30%

5200

B64290L0045X065

T35

3870

r

25%

6000

B64290L0045X035

T37

4190

r

25%

6500

B64290L0045X037

T38

6440

r

30%

10000

B64290L0045X038

B64290L0743

B64290L0045

R 16.0

u

9.60

u

6.30

R 15.8

u

8.90

u

4.70

epcos-ferrites-and-accessories-html.html
background image

579

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Epoxy coating

R 17.0

u

10.7

u

6.80 (mm)

R 0.669

u

0.421

u

0.268 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 0.55 W/core

Epoxy coating

R 18.4

u

5.90

u

5.90 (mm)

R 0.724

u

0.232

u

0.232 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 0.82 W/core

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

17.0

r

0.4

10.7

r

0.3

6.80

r

0.2

0.669

r

0.016

0.421

r

0.012

0.268

r

0.008

uncoated

1)

18.2 max.

9.6 min.

7.8 max.

0.717 max.

0.378 min.

0.307 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

1390

r

25%

2200

B64290L0652X087

2.00

42.00

21.04

884

4.4

N30

2710

r

25%

4300

B64290L0652X830

T65

3250

r

30%

5200

B64290L0652X065

T35

3770

r

25%

6000

B64290L0652X035

T37

4080

r

25%

6500

B64290L0652X037

T38

6280

r

30%

10000

B64290L0652X038

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

18.4

r

0.4

5.9

r

0.3

5.90

r

0.2

0.724

r

0.016

0.232

r

0.012

0.232

r

0.008

uncoated

1)

19.5 max.

4.8 min.

6.7 max.

0.768 max.

0.189 min.

0.264 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

2950

r

25%

2200

B64290L0697X087

0.94

31.03

33.14

1029

6.9

N30

5770

r

25%

4300

B64290L0697X830

T65

6680

r

30%

5000

B64290L0697X065

T35

8020

r

25%

6000

B64290L0697X035

T37

8690

r

25%

6500

B64290L0697X037

T38

13400

r

30% 10000

B64290L0697X038

B64290L0652

B64290L0697

R 18.4

u

5.90

u

5.90

R 17.0

u

10.7

u

6.80

epcos-ferrites-and-accessories-html.html
background image

580

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Epoxy coating

R 20.0

u

10.0

u

7.00 (mm)

R 0.787

u

0.394

u

0.276 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 0.95 W/core

Epoxy coating

R 22.1

u

13.7

u

6.35 (mm)

R 0.870

u

0.539

u

0.250 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 0.85 W/core

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

20.0

r

0.4

10.0

r

0.25

7.00

r

0.3

0.787

r

0.016

0.394

r

0.010

0.276

r

0.012

uncoated

1)

21.2 max.

8.95 min.

8.1 max.

0.835 max.

0.352 min.

0.319 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

2130

r

25%

2200

B64290L0632X087

1.30

43.55

33.63

1465

7.6

N30

4160

r

25%

4300

B64290L0632X830

T35

5000

r

25%

5100

B64290L0632X035

T65

5050

r

30%

5200

B64290L0632X065

T37

6280

r

25%

6500

B64290L0632X037

T38

9740

r

30%

10000

B64290L0632X038

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

22.1

r

0.4

13.7

r

0.3

6.35

r

0.3

0.870

r

0.016

0.539

r

0.012

0.250

r

0.012

uncoated

1)

23.3 max.

12.6 min.

7.4 max.

0.917 max.

0.496 min.

0.291 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

1340

r

25%

2200

B64290L0638X087

2.07

54.15

26.17

1417

6.8

N30

2610

r

25%

4300

B64290L0638X830

T65

3160

r

30%

5200

B64290L0638X065

T35

3200

r

25%

5300

B64290L0638X035

T37

3950

r

25%

6500

B64290L0638X037

T38

6070

r

30%

10000

B64290L0638X038

B64290L0632

B64290L0638

R 22.1

u

13.7

u

6.35

R 20.0

u

10.0

u

7.00

epcos-ferrites-and-accessories-html.html
background image

581

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Epoxy coating

R 22.1

u

13.7

u

7.90 (mm)

R 0.870

u

0.539

u

0.311 (inch)

Dimensions

Characteristics and ordering codes

N49: P

V

 ( 50 mT, 500 kHz, 100 °C) < 0.30 W/core

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 1.05 W/core

Epoxy coating

R 22.1

u

13.7

u

12.5 (mm)

R 0.870

u

0.539

u

0.492 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 1.75 W/core

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

22.1

r

0.4

13.7

r

0.3

7.90

r

0.3

0.870

r

0.016

0.539

r

0.012

0.311

r

0.012

uncoated

1)

23.3 max.

12.6 min.

9.0 max.

0.917 max.

0.496 min.

0.354 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N49

1130

r

25%

1500

B64290L0719X049

1.66

54.2

32.6

1763

8.4

N87

1660

r

25%

2200

B64290L0719X087

N30

3250

r

25%

4300

B64290L0719X830

T65

3930

r

30%

5200

B64290L0719X065

T35

4000

r

25%

5300

B64290L0719X035

T37

4900

r

25%

6500

B64290L0719X037

T38

7570

r

30%

10000

B64290L0719X038

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

22.1

r

0.4

13.7

r

0.3

12.5

r

0.5

0.870

r

0.016

0.539

r

0.012

0.492

r

0.020

uncoated

1)

23.3 max.

12.6 min.

13.8 max.

0.917 max.

0.496 min.

0.543 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

2630

r

25%

2200

B64290L0651X087

1.05

54.15

51.15

2789

14

N30

5140

r

25%

4300

B64290L0651X830

T35

6000

r

25%

5000

B64290L0651X035

T65

6200

r

30%

5200

B64290L0651X065

T37

7770

r

25%

6500

B64290L0651X037

T38

12000

r

30% 10000

B64290L0651X038

B64290L0719

B64290L0651

R 22.1

u

13.7

u

12.5

R 22.1

u

13.7

u

7.90

epcos-ferrites-and-accessories-html.html
background image

582

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Epoxy coating

R 22.6

u

14.7

u

9.20 (mm)

R 0.890

u

0.579

u

0.362 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 1.25 W/core

Epoxy coating

R 25.3

u

14.8

u

10.0 (mm)

R 0.996

u

0.583

u

0.394 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 2 W/core

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

22.6

r

0.4

14.7

r

0.2

9.20

r

0.2

0.890

r

0.016

0.579

r

0.008

0.362

r

0.008

uncoated

1)

23.8 max.

13.7 min.

10.2 max.

0.937 max.

0.539 min.

0.402 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

1740

r

25%

2200

B64290L0626X087

1.59

56.82

35.78

2033

9.8

N30

3420

r

25%

4300

B64290L0626X830

T65

4100

r

30%

5200

B64290L0626X065

T35

4200

r

25%

5300

B64290L0626X035

T37

5170

r

25%

6500

B64290L0626X037

T38

7900

r

30%

10000

B64290L0626X038

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

25.3

r

0.5

14.8

r

0.5

10.0

r

0.2

0.996

r

0.020

0.583

r

0.020

0.394

r

0.008

uncoated

1)

26.6 max.

13.5 min.

11.0 max.

1.047 max.

0.531 min.

0.433 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

2360

r

25%

2200

B64290L0618X087

1.17

60.07

51.26

3079

16

N30

4620

r

25%

4300

B64290L0618X830

T65

5350

r

30%

5000

B64290L0618X065

T35

5400

r

25%

5000

B64290L0618X035

T37

6970

r

25%

6500

B64290L0618X037

T38

10700

r

30% 10000

B64290L0618X038

B64290L0626

B64290L0618

R 25.3

u

14.8

u

10.0

R 22.6

u

14.7

u

9.20

epcos-ferrites-and-accessories-html.html
background image

583

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Epoxy coating

R 25.3

u

14.8

u

15.0 (mm)

R 0.996

u

0.583

u

0.590 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 3 W/core

Epoxy coating

R 25.3

u

14.8

u

20.0 (mm)

R 0.996

u

0.583

u

0.787 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 4.1 W/core

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

25.3

r

0.5

14.8

r

0.5

15.0

r

0.4

0.996

r

0.020

0.583

r

0.020

0.590

r

0.016

uncoated

1)

26.6 max.

13.5 min.

16.2 max.

1.047 max.

0.531 min.

0.638 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

3500

r

25%

2200

B64290L0615X087

0.78

60.07

76.89

4619

24

N30

6930

r

25%

4300

B64290L0615X830

T65

8000

r

30%

5000

B64290L0615X065

T37

10460

r

25%

6500

B64290L0615X037

T38

16100

r

30% 10000

B64290L0615X038

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

25.3

r

0.5

14.8

r

0.5

20.0

r

0.5

0.996

r

0.020

0.583

r

0.020

0.787

r

0.020

uncoated

1)

26.6 max.

13.5 min.

21.3 max.

1.047 max.

0.531 min.

0.839 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

4680

r

25%

2200

B64290L0616X087

0.59

60.07

102.5

6157

33

N30

9160

r

25%

4300

B64290L0616X830

T65

10600

r

30%

5000

B64290L0616X065

T35

10700

r

25%

5000

B64290L0616X035

T37

13800

r

25%

6400

B64290L0616X037

T38

21300

r

30% 10000

B64290L0616X038

B64290L0615

B64290L0616

R 25.3

u

14.8

u

20.0

R 25.3

u

14.8

u

15.0

epcos-ferrites-and-accessories-html.html
background image

584

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Epoxy coating

R 29.5

u

19.0

u

14.9 (mm)

R 1.142

u

0.748

u

0.587 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 2.95 W/core

Epoxy coating

R 30.5

u

20.0

u

12.5 (mm)

R 1.201

u

0.787

u

0.492 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 2.65 W/core

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

29.5

r

0.7

19.0

r

0.5

14.9

r

0.4

1.142

r

0.028

0.748

r

0.020

0.587

r

0.016

uncoated

1)

31.0 max.

17.7 min.

16.1 max.

1.220 max.

0.697 min.

0.634 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

2880

r

25%

2200

B64290L0647X087

0.96

73.78

76.98

5680

27

N30

5630

r

25%

4300

B64290L0647X830

T65

6800

r

30%

5200

B64290L0647X065

T37

8500

r

25%

6500

B64290L0647X037

T38

13100

r

30% 10000

B64290L0647X038

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

30.5

r

1.0

20.0

r

0.6

12.5

r

0.4

1.201

r

0.039

0.787

r

0.024

0.492

r

0.016

uncoated

1)

32.1 max.

18.8 min.

13.5 max.

1.264 max.

0.694 min.

0.531 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

2320

r

25%

2200

B64290L0657X087

1.19

77.02

64.66

4980

25

N30

4540

r

25%

4300

B64290L0657X830

T65

5400

r

30%

5100

B64290L0657X065

T37

6400

r

25%

6100

B64290L0657X037

T38

10600

r

30% 10000

B64290L0657X038

B64290L0647

B64290L0657

R 30.5

u

20.0

u

12.5

R 29.5

u

19.0

u

14.9

epcos-ferrites-and-accessories-html.html
background image

585

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Epoxy coating

R 34.0

u

20.5

u

10.0 (mm)

R 1.339

u

0.807

u

0.394 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 3.4 W/core

Epoxy coating

R 34.0

u

20.5

u

12.5 (mm)

R 1.339

u

0.807

u

0.492 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 4.2 W/core

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

34.0

r

0.7

20.5

r

0.5

10.0

r

0.3

1.339

r

0.028

0.807

r

0.020

0.394

r

0.012

uncoated

1)

35.5 max.

19.2 min.

11.1 max.

1.398 max.

0.756 min.

0.437 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

2230

r

25%

2200

B64290L0058X087

1.24

82.06

66.08

5423

27

N30

4360

r

25%

4300

B64290L0058X830

T65

5100

r

30%

5000

B64290L0058X065

T37

6100

r

25%

6000

B64290L0058X037

T38

10100

r

30% 10000

B64290L0058X038

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

34.0

r

0.7

20.5

r

0.5

12.5

r

0.3

1.339

r

0.028

0.807

r

0.020

0.492

r

0.012

uncoated

1)

35.5 max.

19.2 min.

13.6 max.

1.398 max.

0.756 min.

0.535 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

2790

r

25%

2200

B64290L0048X087

0.99

82.06

82.60

6778

33

N30

5460

r

25%

4300

B64290L0048X830

T65

6400

r

30%

5000

B64290L0048X065

T37

7600

r

25%

6000

B64290L0048X037

T38

12700

r

30% 10000

B64290L0048X038

B64290L0058

B64290L0048

R 34.0

u

20.5

u

12.5

R 34.0

u

20.5

u

10.0

epcos-ferrites-and-accessories-html.html
background image

586

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Epoxy coating

R 36.0

u

23.0

u

15.0 (mm)

R 1.417

u

0.906

u

0.591 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 5.4 W/core

Epoxy coating

R 38.1

u

19.05

u

12.7 (mm)

R 1.500

u

0.750

u

0.500 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 6.5 W/core

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

36.0

r

0.7

23.0

r

0.5

15.0

r

0.4

1.417

r

0.028

0.906

r

0.020

0.591

r

0.016

uncoated

1)

37.5 max.

21.7 min.

16.2 max.

1.476 max.

0.854 min.

0.638 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

2940

r

25%

2200

B64290L0674X087

0.94

89.65

95.89

8597

43

N30

5750

r

25%

4300

B64290L0674X830

T65

6800

r

30%

5000

B64290L0674X065

T37

8000

r

25%

6000

B64290L0674X037

T38

13500

r

30% 10000

B64290L0674X038

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

38.1

r

0.5

19.05

r

0.4

12.7

r

0.3

1.500

r

0.020

0.750

r

0.016

0.500

r

0.012

uncoated

1)

39.4 max.

17.85 min.

13.8 max.

1.551 max.

0.703 min.

0.543 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

3870

r

25%

2200

B64290L0668X087

0.71

82.97

116.2

9644

52

N30

7570

r

25%

4300

B64290L0668X830

T65

8800

r

30%

5000

B64290L0668X065

T37

10500

r

25%

6000

B64290L0668X037

T38

17600

r

30% 10000

B64290L0668X038

B64290L0674

B64290L0668

R 38.1

u

19.05

u

12.7

R 36.0

u

23.0

u

15.0

epcos-ferrites-and-accessories-html.html
background image

587

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Epoxy coating

R 40.0

u

24.0

u

16.0 (mm)

R 1.575

u

0.945

u

0.630 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 7.6 W/core

Epoxy coating

R 41.8

u

26.2

u

12.5 (mm)

R 1.646

u

1.031

u

0.492 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 6 W/core

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

40.0

r

1.0

24.0

r

0.7

16.0

r

0.4

1.575

r

0.039

0.945

r

0.028

0.630

r

0.016

uncoated

1)

41.8 max.

22.5 min.

17.2 max.

1.646 max.

0.886 min.

0.677 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

3590

r

25%

2200

B64290L0659X087

0.77

96.29

125.3

12070

61

N30

7000

r

25%

4300

B64290L0659X830

T65

8200

r

30%

5000

B64290L0659X065

T35

8200

r

25%

5000

B64290L0659X035

T37

9800

r

25%

6000

B64290L0659X037

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

41.8

r

1.0

26.2

r

0.6

12.5

r

0.3

1.646

r

0.039

1.031

r

0.024

0.492

r

0.012

uncoated

1)

43.6 max.

24.8 min.

13.6 max.

1.717 max.

0.976 min.

0.535 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

N87

2560

r

25%

2200

B64290L0022X087

1.08

103.0

95.75

9862

50

N30

5000

r

25%

4300

B64290L0022X830

T65

5800

r

30%

5000

B64290L0022X065

T37

7000

r

25%

6000

B64290L0022X037

T38

11600

r

30% 10000

B64290L0022X038

B64290L0659

B64290L0022

R 41.8

u

26.2

u

12.5

R 40.0

u

24.0

u

16.0

epcos-ferrites-and-accessories-html.html
background image

588

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Epoxy coating

R 50.0

u

30.0

u

20.0 (mm)

R 1.969

u

1.181

u

0.787 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 14.2 W/core

Epoxy coating

R 58.3

u

32.0

u

18.0 (mm)

R 2.295

u

1.260

u

0.709 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 19 W/core

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

50.0

r

1.0

30.0

r

0.7

20.0

r

0.5

1.969

r

0.039

1.181

r

0.028

0.787

r

0.020

uncoated

1)

51.8 max.

28.5 min.

21.3 max.

2.039 max.

1.122 min.

0.839 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

1400

r

25%

700

B64290A0082X010

0.62

120.4

195.7

23560

120

N87

4460

r

25% 2200

B64290L0082X087

N30

8700

r

25% 4300

B64290L0082X830

T65

10000

r

30% 4900

B64290L0082X065

T37

12000

r

25% 6000

B64290L0082X037

T38

17400

r

30% 8500

B64290L0082X038

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

58.3

r

1.0

32.0

r

0.7

18.0

r

0.5

2.295

r

0.039

1.260

r

0.028

0.709

r

0.020

uncoated

1)

60.1 max.

30.5 min.

19.3 max.

2.366 max.

1.201 min.

0.760 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

1500

r

25%

700

B64290A0043X010

0.58

134.0

230.0

30710

160

N87

4800

r

25% 2200

B64290L0043X087

N30

9300

r

25% 4300

B64290L0043X830

T37

13000

r

25% 6000

B64290L0043X037

B64290L0082

B64290L0043

R 58.3

u

32.0

u

18.0

R 50.0

u

30.0

u

20.0

epcos-ferrites-and-accessories-html.html
background image

589

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Epoxy coating

R 58.3

u

40.8

u

17.6 (mm)

R 2.295

u

1.606

u

0.693 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 14.5 W/core

Epoxy coating

R 58.3

u

40.8

u

20.2 (mm)

R 2.295

u

1.606

u

0.795 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 16.6 W/core

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

58.3

r

1.0

40.8

r

0.8

17.6

r

0.4

2.295

r

0.039

1.606

r

0.031

0.693

r

0.016

uncoated

1)

60.1 max.

39.2 min.

18.8 max.

2.366 max.

1.543 min.

0.740 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

900

r

25%

700

B64290A0040X010

1.00

152.4

152.4

23230

115

N87

2760

r

25%

2200

B64290L0040X087

N30

5400

r

25%

4300

B64290L0040X830

T65

6250

r

30%

5000

B64290L0040X065

T37

7160

r

25%

5700

B64290L0040X037

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

58.3

r

1.0

40.8

r

0.8

20.2

r

0.5

2.295

r

0.039

1.606

r

0.031

0.795

r

0.020

uncoated

1)

60.1 max.

39.2 min.

21.5 max.

2.366 max.

1.543 min.

0.846 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

1000

r

25%

700

B64290A0042X010

0.87

152.4

174.9

26660

130

N87

3200

r

25%

2200

B64290L0042X087

N30

6200

r

25%

4300

B64290L0042X830

T65

7200

r

30%

5000

B64290L0042X065

T37

8000

r

25%

5600

B64290L0042X037

B64290L0040

B64290L0042

R 58.3

u

40.8

u

20.2

R 58.3

u

40.8

u

17.6

epcos-ferrites-and-accessories-html.html
background image

590

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Epoxy coating

R 63.0

u

38.0

u

25.0 (mm)

R 2.480

u

1.496

u

0.984 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (100 mT, 100 kHz, 100 °C) < 5.2 W/core

Epoxy coating

R 68.0

u

48.0

u

13.0 (mm)

R 2.677

u

1.890

u

0.512 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (200 mT, 100 kHz, 100 °C) < 13 W/core

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

63.0

r

1.5

38.0

r

1.2

25.0

r

0.8

2.480

r

0.059

1.496

r

0.047

0.984

r

0.031

uncoated

1)

65.3 max.

36.0 min.

26.6 max.

2.571 max.

1.417 min.

1.047 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

1800

r

25%

700

B64290A0699X010

0.50

152.1

305.9

46530

240

N87

5000

r

25% 2200

B64290L0699X087

N30

10800

r

25% 4300

B64290L0699X830

T65

12600

r

30% 5000

B64290L0699X065

T37

13900

r

25% 5500

B64290L0699X037

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

68.0

r

1.2

48.0

r

1.0

13.0

r

0.4

2.677

r

0.047

1.890

r

0.039

0.512

r

0.015

uncoated

1)

70.0 max.

46.2 min.

14.2 max.

2.756 max.

1.819 min.

0.559 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

600

r

25%

700

B64290A0696X010

1.39

178.6

128.7

22980

115

N87

1990

r

25%

2200

B64290L0696X087

N30

3890

r

25%

4300

B64290L0696X830

T65

4500

r

30%

5000

B64290L0696X065

T37

5000

r

25%

5500

B64290L0696X037

B64290L0699

B64290L0696

R 68.0

u

48.0

u

13.0

R 63.0

u

38.0

u

25.0

epcos-ferrites-and-accessories-html.html
background image

591

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Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Epoxy coating

R 87.0

u

54.3

u

13.5 (mm)

R 3.425

u

2.138

u

0.531 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (100 mT, 100 kHz, 100 °C) < 5 W/core

Epoxy coating

R 102

u

65.8

u

15.0 (mm)

R 4.016

u

2.591

u

0.591 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (100 mT, 100 kHz, 100 °C) < 7.8 W/core

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

87.0

r

1.5

54.3

r

1.1

13.5

r

0.3

3.425

r

0.059

2.138

r

0.043

0.531

r

0.012

uncoated

1)

89.3 max.

52.4 min.

14.8 max.

3.516 max.

2.063 min.

0.583 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

900

r

25%

700

B64290A0730X010

0.99

213.9

216.7

46360

235

N87

2790

r

25%

2200

B64290L0730X087

N30

5400

r

25%

4300

B64290L0730X830

T65

6280

r

30%

5000

B64290L0730X065

T37

7000

r

25%

5500

B64290L0730X037

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

102.0

r

2.0

65.8

r

1.3

15.0

r

0.5

4.016

r

0.079

2.591

r

0.051

0.591

r

0.020

uncoated

1)

104.8 max. 63.7 min.

16.5 max.

4.126 max.

2.508 min.

0.650 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

900

r

25%

700

B64290A0084X010

0.96

255.3

267.2

68220

330

N87

2880

r

25%

2200

B64290L0084X087

N30

5500

r

25%

4200

B64290L0084X830

T65

6500

r

30%

5000

B64290L0084X065

B64290L0730

B64290L0084

R 102

u

65.8

u

15.0

R 87.0

u

54.3

u

13.5

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592

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Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

1) On request

Without coating

R 140

u

103

u

25.0 (mm)

R 5.512

u

4.055

u

0.984 (inch)

Dimensions

Characteristics and ordering codes

N87: P

V

 (100 mT, 100 kHz, 100 °C) < 20 W/core

Without coating

R 202.0

u

153

u

25.0 (mm)

R 7.953

u

6.024

u

0.984 (inch)

Dimensions

Characteristics and ordering codes

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

140.0

r

3.0

103

r

2.0

25.0

r

1.0

5.512

r

0.118

4.055

r

0.079

0.984

r

0.039

uncoated

143.8 max. 100.2 min.

27.2 max.

5.661 max.

3.945 min.

1.071 max.

coated

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

1100

r

25%

700

B64290A0705X010

0.82

375.8

458.9

172440 860

N87

3400

r

25%

2200

B64290L0705X087

N30

6200

r

25%

4000

B64290L0705X830

T37

8400

r

25%

5500

B64290L0705X037

d

a

 (mm)

d

i

 (mm)

Height (mm) d

a

 (inch)

d

i

 (inch)

Height (inch)

202.0

r

4.0

153.0

r

3.0

25.0

r

1.0

7.953

r

0.157

6.024

r

0.118

0.984

r

0.039

uncoated

207.0 max. 149.0 min.

27.5 max.

8.150 max.

5.866 min.

1.083 max.

coated

1)

Mate-

rial

A

L

 value

nH

P

i

(approx.)

Ordering code

Magnetic characteristics

Approx.

weight

g

6

l

/

A

mm

–1

l

e

mm

A

e

mm

2

V

e

mm

3

K10

970

r

25%

700

B64290A0711X010

0.90

550.5

608.6

335030 1600

N30

5200

r

25%

3700

B64290A0711X830

B64290A0705

B64290A0711

R 202

u

153

u

25.0

R 140

u

103

u

25.0

epcos-ferrites-and-accessories-html.html
background image

593

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Examples of final applications of ring core accessories

Application of ring core housings – horizontal / vertical version

Application of ring core base plate

Epoxy coated ring cores and accessories is ideal combination for current-compensated chokes. 
Combination of various wire diameters and hole/pin arrangement offer many alternatives of appli-
cation.

General information

Toroids (ring cores) accessories

Toroids (ring cores) accessories

epcos-ferrites-and-accessories-html.html
background image

594

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Base plate for ring cores

Material:

GFR polycarbonate UL94 V-0

Makrolon 9415 [E41613], color code blue, Fa. BAYER MATERIALSCIENCE AG

1) Combination with ring core housing B64291A1704X000
2) Hole diameter 1.0 … 3.1 mm possible

Base plate

Ordering code

Figure

Dimensions

mm

Hole diameter

d mm

Lead spacing

mm

Holes

a

40.4 

u

 20.5

1.1

22.86 

u

 15.24

4

B64293A1000X000

40.4 

u

 20.5

1.4

22.86 

u

 15.24

4

B64293A1100X000

b

‡

 47.8

1.7

see picture

8

B64293A1200X000

1)

c

‡

 64.0

2.9

see picture

6

B64293A1300X000

2)

‡

 64.0

2.1

see picture

6

B64293A1400X000

2)

B64293

Preliminary data

Base plate for ring cores

Toroids (ring cores) accessories

epcos-ferrites-and-accessories-html.html
background image

595

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Figure a

Figure b

*)

Figure c

Tolerances to ISO 2768-C unless otherwise noted.

Dimensions in mm.

*) Combination with ring core housing B64291A1704X000

B64293

Base plate for ring cores

Toroids (ring cores) accessories

Preliminary data

epcos-ferrites-and-accessories-html.html
background image

596

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Housings for ring cores – horizontal version

Material:

B64291A: GFR polycarbonate UL94 V-0

Makrolon 9415 [E41613], color code blue, BAYER MATERIALSCIENCE AG

B64291B: GFR liquid crystal polymer UL94 V-0

Vectra E130i [E83005], color code natural, TICONA

Solderability (lead-free): to IEC 60068-2-20, test Ta, + 245 

r

5 °C,  3  ± 0.3  s

Resistance to soldering heat (wave soldering): to IEC 60068-2-20, test Tb, + 260 

r

5 °C,  10 

r

1 s

1) Combination with base plate B64293A1200X000

Housings – horizontal version

Ordering code

Figure

Inner diameter

mm

Height

mm

Lead spacing

mm

Pins

a

11.6

9.6

10 

u

 10

4

B64291A1004X000

b

12.0

8.0

see picture

8

B64291B1008X000

c

20.4

13.3

20 

u

 12.5

4

B64291A1104X000

d

26.0

16.8

25 

u

 15

4

B64291A1204X000

e

30.0

19.7

30 

u

 20

4

B64291A1304X000

f

30.0

25.0

30 

u

 20

4

B64291A1404X000

g

39.3

25.0

15 

u

 40

4

B64291A1504X000

h

39.3

30.0

15 

u

 40

4

B64291A1604X000

i

48.0

32.0

B64291A1704X000

1)

j

70.6

39.1

B64291A1804X000

B64291

Preliminary data

Housings for ring cores

Toroids (ring cores) accessories

epcos-ferrites-and-accessories-html.html
background image

597

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Figure a

Figure b

Tolerances to ISO 2768-C unless otherwise noted.

Dimensions in mm.

B64291

Preliminary data

Housings for ring cores

Toroids (ring cores) accessories

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598

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Figure c

Figure d

Figure e

Figure f

Figure g

Tolerances to ISO 2768-C unless otherwise noted.

Dimensions in mm.

B64291

Preliminary data

Housings for ring cores

Toroids (ring cores) accessories

epcos-ferrites-and-accessories-html.html
background image

599

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Figure h

Figure i

*)

Figure j

Tolerances to ISO 2768-C unless otherwise noted.

Dimensions in mm.

*) Combination with base plate B64293A1200X000

B64291

Preliminary data

Housings for ring cores

Toroids (ring cores) accessories

epcos-ferrites-and-accessories-html.html
background image

600

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Housings for ring cores – vertical version

Material:

B64292A: GFR polycarbonate UL94 V-0

Makrolon 9415 [E41613], color code blue, BAYER MATERIALSCIENCE AG

B64292B: GFR liquid crystal polymer UL94 V-0

Vectra E130i [E83005], color code natural, TICONA

Solderability (lead-free): to IEC 60068-2-20, test Ta, + 245 

r

5 °C, 3 

r

0.3 s

Resistance to soldering heat (wave soldering): to IEC 60068-2-20, test Tb, + 260 

r

5 °C, 10 

r

1 s

1) B64292A1604X000 with unsymetrical lead spacing (12.7 

u

 2.54/5.08 mm)

Housings – vertical version

Ordering code

Figure

Inner diamensions

mm

Height

mm

Lead spacing

mm

Pins

a

11.9 

u

6.0

14.0

10.0 

u

7.5

4

B64292A1004X000

11.9 

u

6.0

14.0

10.0 

u

7.5

4

B64292B1004X000

11.9 

u

6.0

14.0

see picture

8

B64292A1008X000

b

21.0 

u

 10.5

25.4

10.0 

u

 12.5

4

B64292A1104X000

c

25.7 

u

 13.2

30.5

12.5 

u

 15.0

4

B64292A1204X000

d

29.0 

u

 11.3

33.2

12.5 

u

 15.0

4

B64292A1304X000

e

38.3 

u

 13.3

40.0

12.5 

u

 17.5

4

B64292A1404X000

B64292

Preliminary data

Housings for ring cores

Toroids (ring cores) accessories

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Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Figure a

*)

Figure b

Figure c

Tolerances to ISO 2768-C unless otherwise noted.

Dimensions in mm.

*) For 4 PIN version B64292A1004X000

and B64292B1004X000 PIN 2, 3, 6 and 7 omitted

B64292

Preliminary data

Housings for ring cores

Toroids (ring cores) accessories

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background image

602

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Figure d

Figure e

Tolerances to ISO 2768-C unless otherwise noted.

Dimensions in mm.

B64292

Preliminary data

Housings for ring cores

Toroids (ring cores) accessories

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background image

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Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Primarily used for broadband
transformers up to high frequencies

Application examples

SIFERRIT material N30 for low frequencies

and for pulse applications

SIFERRIT material K1

for matching transformers and baluns

up to about 250 MHz in antenna feeders

or in input circuits of VHF and TV receivers

1) Cores made of NiZn ferrite may exceed the specified dimensions by up to 5%.
2) Magnetic characteristics and A

L

 value are based on winding of center leg.

3) Double-aperture cores are available with parylene coating on request. Ordering code for coated version: 

B62152P…

Dimensions

1)

Magnetic characteristics

Weight

h

(mm)

b

(mm)

a

(mm)

c

(mm)

d

(mm)

6

l

/

A

2)

mm

–1

l

e

2)

mm

A

e

2)

mm

2

V

e

2)

mm

3

g

14.5 – 1.0 14.50 – 1.0 8.5 – 0.5 5.85 

r

0.25 3.4 + 0.60 0.31

15.3

49.7

760

4.0

8.3 – 0.6 14.50 – 1.0 8.5 – 0.5 5.85 

r

0.25 3.4 + 0.60 0.54

15.3

28.4

435

2.5

6.2 – 0.5

7.25 – 0.5 4.2 – 0.4 2.90 

r

0.15 1.7 + 0.30 0.75

7.6

10.2

78

0.4

2.5 – 0.2

3.60 – 0.3 2.1 – 0.3 1.45 

r

0.10 0.8 + 0.15 1.78

3.7

2.1

7.8

0.1

2.0 – 0.2

3.60 – 0.3 2.1 – 0.3 1.45 

r

0.10 0.8 + 0.15 2.20

3.7

1.7

6.3

0.1

1.4 – 0.2

3.60 – 0.3 2.1 – 0.3 1.45 

r

0.10 0.8 + 0.15 3.22

3.7

1.2

4.5

0.05

Dimensions with parylene coating

3)

Core

Max. coated h

(mm)

Max. coated b

(mm)

Max. coated a

(mm)

Min. coated d

(mm)

DL 14.5/14.5 /8.5

14.55

14.55

8.55

3.35

DL 8.3/14.5 /8.5

8.35

14.55

8.55

3.35

DL 6.2/ 7.25/4.2

6.25

7.30

4.25

1.65

DL 2.5/ 3.6 /2.1

2.55

3.65

2.15

0.75

DL 2.0/ 3.6 /2.1

2.05

3.65

2.15

0.75

DL 1.4/ 3.6 /2.1

1.45

3.65

2.15

0.75

B62152

Double-aperture cores

Double aperture cores

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604

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Overview of available types

1) Magnetic characteristics and A

L

 value are based on winding of center leg.

2) Double-aperture cores are available with parylene coating on request.

Ordering code for coated version: B62152P…

Core height h

(mm)

Material

A

L

 value

1)

nH (Tol. 

r

30%)

Ordering code

2)

14.5 –1.0

K1

330

B62152A0001X001

8.3 –0.6

K1

N30

190

10000

B62152A0004X001

B62152A0004X030

6.2 –0.5

K1

N30

140

7300

B62152A0007X001

B62152A0007X030

2.5 –0.2

K1

N30

M13

60

3100

1440

B62152A0008X001

B62152A0008X030

B62152A0008X013

2.0 –0.2

K1

N30

M13

42

2400

1100

B62152A0027X001

B62152A0027X030

B62152A0027X013

1.4 –0.2

N30

1600

B62152A0015X030

B62152

Double-aperture cores

epcos-ferrites-and-accessories-html.html
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605

04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Ferrite cores are familiar as brittle, rigid and bulky components for high-inductance coils and 
transformers. The performance of such ferrites depends very much on external influences such as 
temperature, pressure, electromagnetic fields and frequency.

FPC is a homogeneous mixture of ferrite powder and plastic with outstanding mechanical and 
magnetic properties. This rugged material can be processed into injection-molded parts or thin, 
flexible film to open up innovative applications.

The new C351 film is suitable for high-temperature applications up to 200

q

C and is UL 94-V0-listed. 

It is also available with copper coatings of 35 to 75

P

m and in various thicknesses from 0.2 to 

0.4 mm. FPC film of materials C350 and C351 can also be supplied in self-adhesive versions.

FPC film is ideal for EMC applications, e.g. to shield coils against metals or absorb interference at 
frequencies of 500 MHz and higher. It opens up many other applications, such as implementation 
of low-profile coils for identification systems and electronic article surveillance in retailing and 
logistics, for sensors or contactless smart cards. FPC can also be used for compensation of 
deflection yoke coils in TV picture tubes and computer monitors. This innovative material is also 
suitable as spacing between ferrite cores – instead of air gaps or non-magnetic films – to suppress 
leakage fields, for instance, or to adjust the biasing curve.

General information

Ferrite polymer composites

Ferrite polymer composites

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04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Basic features

FPC is a composite material of polymer and ferrite

FPC film is a thin, mechanically flexible film

Technical benefits

Stable magnetic characteristics

Low weight: FPC film is 40% lower in density than ferrite

High mechanical strength

Shaping as required: customer-specific solutions possible

Economy: easy transport and storage,

simple, rationalized processing, low mounting volume

C351 film suitable for high-temperature applications (up to 200

q

C)

Material C351 approved to UL 94-V0 (E 140 693)

Various film thickness (from 0.2 to 0.4 mm), thickness tolerance 

r

15%

Self-adhesive versions

C351 film with optional copper coatings 35 to 75

P

m thick

Applications

Implementation of low-profile coils, e. g. for

– identification systems

– security tags for electronic article surveillance

– sensors

– inductive reading of smart cards

Electromagnetic shielding of coils from metals to prevent interference

EMC: absorption of radiated emissions at frequencies 

t

500 MHz

Compensation of deflection yokes to correct distortion at the corners of TV screens and monitors

Spacing between ferrite cores (as a substitute for air gaps or non-magnetic films) for

– suppression of the leakage field

– adjustment of the biasing curve

B68450 … B68452

C350, C351

C350, C351

FPC film

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Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Ordering details

FPC film is supplied in units of 50 m length.

1) Copper coating only in combination with C351.
2) On request

The ordering codes are structured as follows:

1st group

Design

2nd group

Film thickness /width

3rd group

Copper coating

1)

/material

B68450 = Film on reel

A = 0.2 mm

B = 0.3 mm

0080 = 80 mm

X = Default letter

350 = C350

351 = C351

B68451 = Film on reel,

self-adhesive

B68452 = Film on reel,

copper-coated

(only in combination

(

with C351!)

Material

Thickness

(mm)

Extra features

Ordering code

C350

0.2

B68450A0080X350

C351

0.2

B68450A0080X351

C350

0.2

self-adhesive

B68451A0080X350

2)

C351

0.3

self-adhesive

B68451B0080X351

2)

B68450 … B68452

C350, C351

FPC film

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04/13

Please read 

Important notes 

on page 2

and

Cautions and warnings 

on page 609.

Physical properties 

(material values defined on 0.2 mm thick film)

1) T = 25

q

C to IEC 51 (CO) 282

2) T = 23

q

C and 50% r.h.

3) UL 94, flame class V0 (listed E 140 693)

Material

Symbol

Unit

C350

C351

3)

Initial permeability

1)

f = 1 MHz

P

i

9

r

20%

9

r

20%

Flux density (near saturation)

1)

H = 25 kA/m

f = 10 kHz

B

S

mT

255

255

Remanent flux density

1)

H = 25 kA/m

f = 10 kHz

B

r

mT

9

9

Coercive field strength

1)

H = 25 kA/m

f = 10 kHz

H

C

A/m

600

600

Relative loss factor

1)

f = 10 MHz

f =   1 GHz

tan

G

/

P

i

<0.005

<0.400

<0.005

<0.400

Hysteresis material constant

K

B

10

–3

/mT

<2

<2

Temperature coefficient

1)

D

 = 

'P

/

P'

T

1/K

<5  ·  10

–5

<5 ·  10

–5

Density

kg/m

3

2930

2930

Resistivity

 1)

f =   1 kHz

f = 10 MHz

U

:

m

500

100

500

100

Dielectric constant

1)

f =   1 kHz

f = 10 MHz

H

r

700

21

700

21

Dielectric strength

kV/mm

1

0.8

Max. operating temperature

T

max

q

C

120

200

Tensile strength

2)

V

Z

N/mm

2

1.5

2.5

B68450 … B68452

C350, C351

FPC film

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Mechanical stress and mounting

Ferrite cores have to meet mechanical requirements during assembling and for a growing number 
of applications. Since ferrites are ceramic materials one has to be aware of the special behavior 
under mechanical load.

As valid for any ceramic material, ferrite cores are brittle and sensitive to any shock, fast changing 
or tensile load. Especially high cooling rates under ultrasonic cleaning and high static or cyclic loads 
can cause cracks or failure of the ferrite cores.

For detailed information see chapter 

“Definitions”

, section 8.1.

Effects of core combination on A

L

 value 

Stresses in the core affect not only the mechanical but also the magnetic properties. It is apparent 
that the initial permeability is dependent on the stress state of the core. The higher the stresses are 
in the core, the lower is the value for the initial permeability. Thus the embedding medium should 
have the greatest possible elasticity.

For detailed information see chapter 

“Definitions”

, section 8.2.

Heating up

Ferrites can run hot during operation at higher flux densities and higher frequencies.

NiZn-materials

The magnetic properties of NiZn-materials can change irreversible in high magnetic fields.

Processing notes

– The start of the winding process should be soft. Else the flanges may be destroid.

– To strong winding forces may blast the flanges or squeeze the tube that the cores can no more 

be mount.

– To long soldering time at high temperature (>300 °C) may effect coplanarity or pin arrangement.

– Not following the processing notes for soldering of the J-leg terminals may cause solderability 

problems at the transformer because of pollution with Sn oxyd of the tin bath or burned insulation 
of the wire. For detailed information see chapter 

“Processing notes”

, section 8.2.

– The dimensions of the hole arrangement have fixed values and should be understood as

a recommendation for drilling the printed circuit board. For dimensioning the pins, the group

of holes can only be seen under certain conditions, as they fit into the given hole arrangement.

To avoid problems when mounting the transformer, the manufacturing tolerances for positioning 
the customers’ drilling process must be considered by increasing the hole diameter.

Cautions and warnings

Ferrites and accessories

Cautions and warnings

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611

04/13

Symbol

Meaning

Unit

A

A

e

A

L

A

L1

A

min

A

N

A

R

B

'

B

B

ˆ

'

B

ˆ

B

DC

B

R

B

S

C

0

CDF

DF

d

E

a

f

f

cutoff

f

max

f

min

f

r

f

Cu

g

H

H

ˆ

H

DC

H

c

h

h/

P

i

2

I

I

DC

J

k

k

3

k

3c

L

Cross section of coil

Effective magnetic cross section

Inductance factor; A

L

 = L/N

2

Minimum inductance at defined high saturation (

P

a

)

Minimum core cross section

Winding cross section

Resistance factor; A

R

 = R

Cu

/N

2

RMS value of magnetic flux density

Flux density deviation

Peak value of magnetic flux density

Peak value of flux density deviation

DC magnetic flux density

Remanent flux density

Saturation magnetization

Winding capacitance

Core distortion factor

Relative disaccommodation coefficient DF = d/

P

i

Disaccommodation coefficient

Activation energy

Frequency

Cut-off  frequency

Upper frequency limit

Lower frequency limit

Resonance frequency

Copper filling factor

Air gap

RMS value of magnetic field strength

Peak value of magnetic field strength

DC field strength

Coercive field strength

Hysteresis coefficient of material

Relative hysteresis coefficient

RMS value of current

Direct current

Peak value of current

Polarization

Boltzmann constant

Third harmonic distortion

Circuit third harmonic distortion

Inductance

mm

2

mm

2

nH

nH

mm

2

mm

2

P:

 = 10

–6

:

Vs/m

2

, mT

Vs/m

2

, mT

Vs/m

2

, mT

Vs/m

2

, mT

Vs/m

2

, mT

Vs/m

2

, mT

Vs/m

2

, mT

F = As/V

mm

–4.5


J

s

–1

, Hz

s

–1

, Hz

s

–1

, Hz

s

–1

, Hz

s

–1

, Hz

mm

A/m

A/m

A/m

A/m

10

–6

 cm/A

10

–6

 cm/A

A

A

A

Vs/m

2

J/K


H = Vs/A

Symbols and terms

Ferrites and accessories

Symbols and terms

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612

04/13

Symbol

Meaning

Unit

'

L/L

L

0

L

H

L

p

L

rev

L

s

l

e

l

N

N

P

Cu

P

trans

P

V

PF

Q

R

R

Cu

R

h

'

R

h

R

i

R

p

R

s

R

th

R

V

s

T

'

T

T

C

t

t

v

tan

G

tan

G

L

tan

G

r

tan

G

e

tan

G

h

tan

G

/

P

i

U

Û

V

e

Z

Z

n

Relative inductance change

Inductance of coil without core

Main inductance

Parallel inductance

Reversible inductance

Series inductance

Effective magnetic path length

Average length of turn

Number of turns

Copper (winding) losses

Transferrable power

Relative core losses

Performance factor

Quality factor (Q = 

Z

L/R

s

 = 1/tan

G

L

)

Resistance

Copper (winding) resistance (f = 0)

Hysteresis loss resistance of a core

R

h

 change

Internal resistance

Parallel loss resistance of a core

Series loss resistance of a core

Thermal resistance

Effective loss resistance of a core

Total air gap

Temperature

Temperature difference

Curie temperature

Time

Pulse duty factor

Loss factor

Loss factor of coil

(Residual) loss factor at H 

o

 0

Relative loss factor

Hysteresis loss factor

Relative loss factor of material at H 

o

 0

RMS value of voltage

Peak value of voltage

Effective magnetic volume

Complex impedance

Normalized impedance |Z|

n

 = |Z| /N

2

u

H

 (l

e

/A

e

)

H

H

H

H

H

H

mm

mm

W

W

mW/g

:
:
:
:
:
:
:

K/W

:

mm

°C

K

°C

s







V

V

mm

3

:
:

/mm

Symbols and terms

Ferrites and accessories

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04/13

All dimensions are given in mm.

Surface-mount device

Symbol

Meaning

Unit

D
D

F

D

e

H

r

)
K
K

B

K

i

O

s

P
P

0

P

a

P

app

P

e

P

i

P

p

'

P

p

"

P

r

P

rev

P

s

'

P

s

"

P

tot

U
6

l/A

W

Cu

Z

Temperature coefficient (TK)

Relative temperature coefficient of material

Temperature coefficient of effective permeability

Relative permittivity

Magnetic flux

Efficiency of a transformer

Hysteresis material constant

Hysteresis core constant

Magnetostriction at saturation magnetization

Relative complex permeability

Magnetic field constant

Relative amplitude permeability

Relative apparent permeability

Relative effective permeability

Relative initial permeability

Relative real (inductive) component of 

P

(for parallel components)

Relative imaginary (loss) component of 

P

(for parallel components)

Relative permeability

Relative reversible permeability

Relative real (inductive) component of 

P

(for series components)

Relative imaginary (loss) component of 

P

(for series components)

Relative total permeability

derived from the static magnetization curve

Resistivity

Magnetic form factor

DC time constant 

W

Cu

 = L/R

Cu

 = A

L

/A

R

Angular frequency; 

Z

= 2 

3

f

1/K

1/K

1/K

Vs

mT

-1

A

–1

H

–1/2


Vs/Am













:

m

–1

mm

–1

s

s

–1

Symbols and terms

Ferrites and accessories

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Ordering code structure

RM, P,PQ,  EP, ER9,5, ER11 cores

(Example here RM 4)

E, ELP, EQ, ER, ETD, EFD, EV cores

These cores are supplied as single units; each packing unit contains only cores either with or with-
out shortened center leg (gap dimension »g«). The typical value given in the tables for the A

L

 value 

applies to a core set consisting of one core with a shortened center leg and one core without a 
shortened center leg (dimension »g« approx. 0). E cores with a toleranced A

L

 value are available 

on request. We then prefer a symmetrical air gap distribution.

Ordering example (here ETD 29)

B66358

G 1000

Part number

See table 

“Code letters of

E cores”

See table 

“Code letters of

E cores”

Short designation for the SIFERRIT material

(027   N27, 087   N87 etc.)

X 1 27

Code letter for A

L

 tolerance (see table) or filling number

B65803

N 0160

A 048

Part number

Code letter

for revision status

and version

A

L

 value in nH

Given only for gapped cores.

Not specified for

ungapped cores

(e.g. B65803J0000R030)

Short designation for the SIFERRIT material

(048   N48, 001   K1, 033   M33 etc.)

 Letter 

giving 

A

L

 value tolerance

A

r

 3%

B

r

 4%

C

r

 6%

D

r

 8%

E

r

 7%

H

r

12%

J

r

 5%

K

r

10%

L

r

15%

M

r

20%

R

 +30/–20%

U

 +80/–  0%

Y

 +40/–30%

X

 Filling letter

Symbols and terms

Ferrites and accessories

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Versions (code letters) of RM cores

Versions (code letters) of P cores

Type

with center hole

(without

threaded sleeve)

with center hole

(with

threaded sleeve)

without

center hole

low-profile

version

RM 4

A

N

J

P

RM 5

C

N

J

P

RM 6

C

N

J

P

RM 7

A

N

J

P

RM 8

D

F

J

P

RM 10

D

N

J

P

RM 12

E

P

RM 14

E

P

Type

with center hole

(without threaded sleeve)

with center hole

(with threaded sleeve)

without center hole

P 3,3 

u

 2,6

C

P 4,6

u

 4,1

B

P 5,8

u

 3,3

D

P 7 

u

 

4

A

P 9

u

 

5

D

T

W

P 11 

u

 

7

D

T

W

P 14 

u

 

8

D

T

W

P 18 

u

 11

D

T

W

P 22 

u

 13

D

N

W

P 26 

u

 16

D

T

W

P 30 

u

 19

D

T

W

P 36 

u

 22

D

T

W

P 41 

u

 25

J

Versions (code letters) of RM, P and E cores

Symbols and terms

Ferrites and accessories

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Versions (code letters) of E cores

Code letter

Pairing

Code number

Tolerance

G

E – E

Air gap dimensions in 

P

m

Not specified

for ungapped cores

Air gap toleranced

U

E  –  E

A

L

 value in nH

A

L

 value, asymmetric air gap

A

E  –  E

A

L

 value in nH

A

L

 value, symmetric air gap

W

E – I (for ELP, EQ

and ER planar cores)

A

L

 value in nH

A

L

 value

P

I core (plate for ELP,

EQ and ER planar cores)

E

customized set

F

mirror polished

Symbols and terms

Ferrites and accessories

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Ferrites and accessories

Subject index

A

accessories, material

119

adhesive application

181

air gap

169

A

L

 value

126, 127, 169

amplitude permeability

126, 134

apparent permeability

124

application survey

34

applications

broadband transformers

144

EMI

150

filter

141

inductive sensors

153

LAN

148

power

154

approval for shipment

194

AQL values

195

automatic placement

180

automatic processing

187

B

bag packing

186

balun transformer

34

bandwidth

144

barcode label

184, 195

batch number

194

blister packing

185, 187

blister tapes

189

block packing

185

boxes packing

186

broadband transformers

144

C

cardboard tray

186

certification

192

chamfer

562

chokes

34

coefficient of linear expansion

136

coercive field strength

45, 122

common-mode chokes

149, 151

complex permeability

124

compressive strength

136

conditions of use

196

container packing

186

coplanarity

180

copper factor

140

core losses

131

curie temperature

45, 133

current-compensated chokes

34

customer complaints

196

D

delivery modes

187

delivery quality

194

design and processing information

180

dielectric constant

138

dimensions

194

dip soldering

180

disaccommodation

135

coefficient

135

factor

45, 135

dispatch unit

184

dispenser pack

190

disposal

198

double-aperture cores

603

E

E cores

399

eddy current losses

131

EFD cores

539

effective magnetic cross section

127

effective magnetic length

127

effective magnetic volume

127

effective permeability

123

effective temperature coefficient

134

electronic lamp ballast devices

34

ELP cores

456

EMI applications

150

energy meters

34

environmental

certification

197

management system

197

policy

197

EP, EPX, EPO cores

303

EQ cores

488

ER cores

509

ER planar cores

497

ETD cores

517

EV cores

550

excitation

123

F

ferrimagnetic

121

ferrite polymer composites

605

Subject index   

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618

04/13

Ferrites and accessories

Subject index

ferromagnetic

121

filter applications

141

final adjustment

182

final inspection

194

finish

195

form factor

127

FPC

44

fracture toughness

136

G

gullwing terminals

181

H

high voltage transformers

and power chokes

34

high-excitation range

131

hysteresis

121

hysteresis loss resistance

130

hysteresis material constant

45, 130

I

IEC standards

199

impedance and matching transformers

34

important notes

2

incoming goods inspection

194

inductance

127

inductance factor

127

inductive proximity switches

34

inductive sensors

153

inductor assembly

180

initial magnetization curve

121, 122

initial permeability

45, 123

J

J terminals

181

K

K1

52

K10

55

K8

54

L

lamp ballast device

159

LAN applications

148

line attenuation

34

loss factor

129

lot (batch) number

194

low profile

201

M

M13

56

M33

57

magnetic core shape characteristics

127

magnetic field constant

122

magnetic field strength

121

magnetic flux density

121

magnetostriction

138

material data sheets

198

material properties

35

measuring conditions

45

mechanical properties

136

modes of packing

185

modulus of elasticity

136

N

N22

59

N27

60

N30

63

N41

65

N45

68

N48

70

N49

72

N51

75

N72

78

N87

81

N88

84

N92

88

N95

91

N96

94

N97

97

normalized impedance

51

number of turns

170

O

ordering code structure

614

P

P core halves

387

P cores

335

packing

183

packing for coil formers

186

packing unit

184

PC47

100

performance factor

49, 132

permeability

123

permeability factor

134

epcos-ferrites-and-accessories-html.html
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619

04/13

Ferrites and accessories

Subject index

planar devices

154, 167

plastic materials

119

PM cores

288

polarization

121

power applications

154

power capacities

160

power transformers and chokes

34

PQ cores

269

processing notes

169

SMD components

180

production sequence

187, 192, 193

proximity effect

131

proximity switch

153

PS cores

387

push-pull converter

158

Q

quality assessment

200

quality assurance

192

quality factor

130

quality management

192

quality system

192

R

radiation

138

radio-frequency transformer

34

relative inductance component

versus frequency

48

relative loss factor

45, 47, 129

relative permeability

122

relative temperature coefficient

45

reliability

194

remanent flux density

122

residual air gap

169

resistance factor

140

resistivity

138

reversible permeability

125

ring cores accessories (toroids)

593

ring cores (toroids)

561

RM cores

201

S

saturation magnetization

122, 134

saturation-dependent permeability

(amplitude permeability)

134

secondary permeability maximum

133

single-ended flyback converter

156

single-ended forward converter

157

skin effect

131

skin packing

191

small-signal range

129

SMPS transformer cores

160

Snoek’s law

125

solder paste application

181

soldering

180

soldering time

180

specific heat

136

standard tray

185

standardized hysteresis material

constant versus temperature

50

step-down

155

stress sensitivity

137

T

T35

103

T36

105

T37

107

T38

109

T46

111

T57

113

T65

115

T66

117

temperature coefficient of permeability

133

tensile strength

136

thermal conductivity

136

thermal resistance

168

threaded sleeve

142

tolerance

128, 304

toroids

561

traceability

194

transformers for digital data transmission

145

tray (pallet) packing

185

U

U and UI cores

553

UL numbers

119

V

vickers hardness

136

W

Weiss’ domains

121

winding

170

epcos-ferrites-and-accessories-html.html
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Europe

Austria, Bulgaria, Greece,
Macedonia

EPCOS OHG
Vienna/Austria
T +43 51 70 72 56 37
F +43 51 70 75 56 45
sales.csee@epcos.com

Czech Republic

EPCOS s.r.o.
Prague
T +420 2 33 03 22 81
F +420 2 33 03 22 89
sales.czech@epcos.com

Finland, Estonia

EPCOS Nordic OY
Espoo
T +358 9 54 80 70 00
F +358 9 54 80 70 01
sales.nordic@epcos.com

France, Belgium, Luxembourg,
Malta

EPCOS SAS
Pantin/France
T +33 1 49 46 67 89
F +33 1 49 46 67 67
sales.france@epcos.com

Germany, Liechtenstein,
Netherlands, Switzerland

EPCOS AG
Customer Service
Munich/Germany
T (D) 0180 500 33 48

(0.14 Euro/min.)
(NL) +31 70 33 10 611
(CH) +49 89 5 40 20 26 91

F +49 89 5 40 20 29 13
sales.germany@epcos.com

Hungary

EPCOS Elektronikai
Alkatrész Kft.
Budapest
T +36 1 436 07 20
F +36 1 436 07 21
sales.hungary@epcos.com

Italy

TDK-EPC Italy S.r.l.
Milan
T +39 02 50 99 54 25
F +39 02 50 99 54 55
sales.italy@epcos.com

Poland, Latvia, Lithuania

EPCOS Polska Sp. z o.o
Warsaw/Poland
T +48 22 24 60 409
F +48 22 24 60 400
sales.poland@epcos.com

Portugal

EPCOS 2 Portugal LDA
Évora
T +351 91 75 67 927
F +351 21 49 33 476
sales.portugal@epcos.com

Romania

EPCOS Sales Representative
Timisoara
T +40 72 31 14 111
sales.romania@epcos.com

Russia, Belarus, Kazakhstan,
Moldavia, Ukraine

EPCOS LLC
Moscow/Russia
T +7 495 663 21 00 / 22
sales.cis@epcos.com

Slovakia

EPCOS Sales Representative
Dolný Kubín
T +42 1 43 5 82 36 73
F +42 1 43 5 82 37 33
sales.slovakia@epcos.com

Slovenia, Serbia, Croatia,
Bosnia & Herzegovina,
Montenegro

EPCOS Sales Representative
Škofljica/Slovenia
T +386 599 56 35 3
F +386 599 56 35 4
sales.slovenia@epcos.com

Spain

EPCOS Electronic Components
S.A.
Getafe
T +34 91 514 71 61
F +34 91 514 70 14
sales.iberia@epcos.com

Sweden, Iceland, Denmark,
Norway

EPCOS Nordic AB
Kista/Sweden
T +46 8 4 77 27 00
F +46 8 4 77 27 01
sales.nordic@epcos.com

Turkey

EPCOS AG
Liaison Office
Istanbul
T +90 216 5 69 81 01
F +90 216 4 64 07 56
sales.turkey@epcos.com

United Kingdom, Ireland

EPCOS UK Ltd.
Bracknell/UK
T +44 13 44 38 15 10
F +44 13 44 38 15 12
sales.uk@epcos.com

Asia

Afghanistan, Iran, Iraq,
Jordan, Lebanon,
Pakistan, Syria

EPCOS AG
Liaison Office
Istanbul/Turkey
T +90 216 5 69 81 01
F +90 216 4 64 07 56
sales.turkey@epcos.com

China

EPCOS (China) Investment Ltd.
EPCOS (Shanghai) Ltd.
Shanghai
T +86 21 22 19 15 00
F +86 21 22 19 15 99
sales.cn@epcos.com

Hong Kong

EPCOS Limited
Hong Kong
T +852 36 69 82 00
F +852 36 69 82 56
sales.cn@epcos.com

India, Bahrain, Bangladesh,
Kuwait, Nepal, Oman, Qatar,
Saudi Arabia, Sri Lanka,
United Arab Emirates

EPCOS India Private Ltd.
Bangalore/India
T +91 80 40 39 06 15
F +91 80 40 39 06 03
sales.in@epcos.com

Israel

Nisko Projects Electronics &
Communications (1999) Ltd.
Tel Aviv
T +972 37 65 73 00
F +972 37 65 73 33
sales.israel@epcos.com

Japan

TDK-EPC Corporation
Tokyo
T +81 3 52 01 72 41
F +81 3 52 01 72 62
inquiry@jp.tdk.com

Korea

TDK-EPC Korea Co. Ltd.
Seoul
T +82 2 21 56 68 18
F +82 2 21 56 68 98
sales.kr@epcos.com

Malaysia

EPCOS RDC SDN BHD
Nilai
T +60 6 79 98 168
F +60 6 79 98 162
sales.asean@epcos.com

Get in Contact

Get in Contact   

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Philippines

c/o TDK Electronics Philippines
Corporation
Biñan
T +63 49 541 31 41 66 30 / 31
F +63 49 541 31 40
sales.asean@epcos.com

Singapore, Indonesia,
Thailand, Vietnam

EPCOS PTE LTD
Singapore
T +65 68 41 20 11
F +65 67 44 69 92
sales.asean@epcos.com

Taiwan

EPCOS Taiwan Co. Ltd.
Taipei
T +886 2 26 55 76 76
F +886 2 27 82 03 89
sales.tw@epcos.com

Americas

USA, Canada, Mexico

EPCOS, Inc.
Iselin, NJ/USA
T +1 732 9 06 43 00
F +1 732 9 06 43 95
sales.usa@epcos.com

South America

EPCOS do Brasil Ltda.
São Paulo/Brazil
T +55 11 36 12 51 87
F +55 11 36 12 51 65
sales.br@epcos.com

Australia

Australia, New Zealand

Electronic Component
Solutions Pty Ltd
Melbourne/Australia
T +61 3 85 61 19 99
F +61 3 95 74 70 55
sales.au@epcos.com

Africa

Egypt

EPCOS AG
Liaison Office
Istanbul/Turkey
T +90 216 5 69 81 01
F +90 216 4 64 07 56
sales.turkey@epcos.com

Morocco, Tunisia

EPCOS SAS
Pantin/France
T +33 1 49 46 67 89
F +33 1 49 46 67 67
sales.france@epcos.com

South Africa

Electrocomp (PTY) Ltd.
Sandton
T +27 11 458 90 00 32
F +27 11 458 90 34
sales.southernafrica@epcos.com

The addresses of our worldwide distributors and regional sales offices are
available at www.epcos.com/sales

© EPCOS AG 2012, Corporate Communications
P.O.Box 80 17 09, 81617 Munich, Germany
Reproduction, publication and dissemination of this publication and the information contained therein without
EPCOS' prior express consent is prohibited.

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