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Headquarters

110 Delta Drive
P.O. Box 11422 
Pittsburgh, PA 15238 • USA

Phone: 

1.800.245.3984

+1.412.696.1333

e-mail: 

magnetics@spang.com

Magnetics International

13/F 1-3 Chatham Road South
Tsim Sha Tsui
Kowloon, Hong Kong

Phone: 

+852.2731.9700

+86.139.1147.1417

e-mail: 

asiasales@spang.com

www.mag-inc.com

©2021 Magnetics

Magnetics-2021-Ferrite-Catalog-html.html
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FERRITE CORES

Toroids  

  Shapes  

  Pot Cores

Magnetics-2021-Ferrite-Catalog-html.html
background image

TOROID 

 

PG

TOROID

  

PG

40200TC

20

44416TC

24

40301TC

20

44419TC

24

40401TC

20

44715TC

24

40402TC

20

44916TC

26

40502TC

20

44920TC

26

40503TC

20

44925TC

26

40601TC

20

44932TC

26

40603TC

20

46013TC

26

40705TC

20

46019TC

26

40907TC

20

46113TC

26

41003TC

20

46325TC

26

41005TC

20

46326TC

26

41206TC

20

47313TC

26

41303TC

20

 47325TC

26

41304TC

20

47326TC

26

41305TC

20

48613TC

26

41306TC

20

48619TC

26

41405TC

22

48625TC

26

41406TC

22

48626TC

26

41407TC

22

49715TC

26

41410TC

22

49718TC

26

41435TC

22

49725TC

26

41450TC

22

49740TC

26

41506TC

22

41605TC

22

41606TC

22

41607TC

22

41610TC

22

41809TC

22

42106TC

22

42109TC

22

42206TC

22

42207TC

22

42212TC

22

42506TC

22

42507TC

22

42508TC

22

42712TC

24

42908TC

24

42915TC

24

43113TC

24

43205TC

24

43610TC

24

43615TC

24

43620TC

24

43806TC

24

43813TC

24

43825TC

24

44015TC

24

U, I

 

PG

Pot 

41106UC

38

40704UG

54

41106IC

38

40905UG

54

42220UC

38

41107UG

54

42512UC

38

41109UG

54

42515UC

38

41408UG

54

42516IC

38

41811UG

54

42530UC

38

41814UG

54

49316UC

38

42213UG

54

49316IC

38

42438UG

54

49330UC

38

42616UG

54

49332UC

38

42823UG

54

49920UC

38

43019UG

54

49925UC

38

43622UG

54

49925IC

38

44229UG

54

UR

 

RS-DS

PG

44119UC

40

41408UG

56

44121UC

40

41811UG

56

44125UC

40

42311UG

56

44130UC

40

42318UG

56

45716UC

40

42616UG

56

45917UC

40

43019UG

56

46420UC

40

43622UG

56

BLOCK

44229UG

56

41106IC

50

PQ

41308IC

50

42016UG

58

41805IC

50

42020UG

58

42014IC

50

42610UG

58

42107IC

50

42614UG

58

42216IC

50

42620UG

58

42516IC

50

42625UG

58

43208IC

50

43214UG

58

43618IC

50

43220UG

58

43808IC

50

43230UG

58

44008IC

50

43535UG

58

44020IC

50

44040UG

58

44308IC

50

45050UG

58

44310IC

50

RM

 

45810IC

50

41110UG

60

46410IC

50

41510UG

60

49316IC

50

41812UG

60

49925IC

50

41912UG

60

49938FB

50

42013UG

60

49966FB

50

42316UG

60

49985FB

50

42819UG

60

EP 

43723UG

60

40707UG

52

44230UG

60

41010UG

52

41313UG

52

41717UG

52

42120UG

52

Part Number Index

TOROIDS

E CORES

SHAPES

E, I

PG PLANAR E, I PG

EC

 

PG

40904EC

28

41425EC

32

43517EC

42

41203EC

28

41434EC

32

44119EC

42

41205EC

28

41434IC

32

45224EC

42

41707EC

28

41805EC

32

47035EC

42

41808EC

28

41805IC

32

EER

41810EC

28

42107EC

32

42814EC

44

42510EC

28

42107IC

32

42817EC

44

42513EC

28

42214EC

32

43521EC

44

42515EC

28

42214IC

32

44013EC

44

42520EC

28

42216EC

32

44216EC

44

42526EC

28

42216IC

32

44818EC

44

42530EC

28

42217EC

32

44821EC

44

43007EC

28

43208EC

32

45418EC

44

43009EC

28

43208IC

32

EFD 

43515EC

28

43618EC

32

41009EC

46

43520EC

28

43618IC

32

41212EC

46

44011EC

30

43808EC

34

41515EC

46

44016EC

30

43808IC

34

42019EC

46

44020EC

30

43809EC

34

42523EC

46

44020IC

30

44008EC

34

43030EC

46

44022EC

30

44008IC

34

ETD

44033EC

30

44308EC

34

42929EC

48

44317EC

30

44308IC

34

43434EC

48

44721EC

30

44310EC

34

43939EC

48

45528EC

30

44310IC

34

44444EC

48

45530EC

30

45810EC

34

44949EC

48

45724EC

30

45810IC

34

45454EC

48

46016EC

30

46410EC

34

45959EC

48

46022EC

30

46410IC

34

47054EC

48

46527EC

30

49938EC

34

47133EC

30

ER

47228EC

30

40906EC

36

48020EC

30

41126EC

36

49928EC

30

41308EC

36

41308IC

36

41426EC

36

41826EC

36

42014EC

36

42014IC

36

42313EC

36

42517EC

36

42517IC

36

42521EC

36

43021EC

36

43021IC

36

43225EC

36

Magnetics-2021-Ferrite-Catalog-html.html
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www.mag-inc.com

1

Index

Applications & Materials  

2-15

Gapped Cores ..............

16-19

Toroids .......................

20-27

E, I Cores ....................

28-31

Planar E, I Cores ..........

32-35

ER Cores .....................

36-37

U, I Cores ...................

38-39

UR Cores ....................

40-41

EC Cores .....................

42-43

EER Cores ...................

44-45

EFD Cores ...................

46-47

ETD Cores ...................

48-49

Block Cores .................

50-51

EP Cores .....................

52-53

Pot Cores ....................

54-55

RS/DS Cores ..............

56-57

PQ Cores ....................

58-59

RM Cores ....................

60-61

Hardware ........................

62

Design Guides .............

63-67

Magnetics-2021-Ferrite-Catalog-html.html
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MAGNETICS

2

Applications  

& Materials

Ferrites are dense, homogenous ceramic structures made by mixing iron oxide with 
oxides or carbonates of one or more metals such as zinc, manganese, nickel or mag-
nesium. They are pressed, then fired in a kiln at 1,000 - 1,500°C and machined as 
needed to meet various operational requirements. Ferrite parts can be easily and eco-
nomically molded into many different geometries. A diverse set of materials, providing 
a range of desired electrical and mechanical properties, are available from Magnetics.

Magnetics’ ferrite cores are manufactured for a wide variety of applications. Magnetics 
has the leading MnZn ferrite materials for power transformers, power inductors, wide-
band transformers, common mode chokes, as well as many other applications.

FERRITE APPLICATIONS

APPLICATIONS

DESIRED PROPERTIES

PREFERRED MATERIALS

AVAILABLE SHAPES

Broadband Transformers

Low loss, high µ. Good frequency response. 

J, W, M

Pot cores, Toroids, E, U & I cores,  
RM cores, EP cores

Common Mode Chokes

Very high µ (permeability).

J, W, M

Toroids, E Cores

Converter and Inverter Transformers

Low losses, high saturation.

F, L, P, R, T

Toroids, E, U & I cores, Pot cores,  
RS cores, Planar cores

Differential Mode Inductors

Low losses, high temperature stability, good 
stability across load conditions.

F, P, R, T

Gapped Pot cores, EP cores, E cores,  
RM cores, Planar cores, PQ cores

Linear Filters and Sensors

Good loss factor, linearity and temperature 
linearity at low drive level.

C, E, V

Pot cores, Toroids

Narrow Band Transformers

Moderate Q, high µ, high stability.

F, J

Pot cores, Toroids, RM cores, EP cores

Noise Filters

High µ, good frequency response.

J, W, M

Toroids

Power Inductors

Low losses at high flux densities and tem-
peratures. High saturation. Good stability 
across load conditions.

F, L, P, R, T

Pot cores, E cores, PQ cores, RM cores, 
Planar cores

Power Transformers

High µ and low losses at high flux densities 
and temperatures. High saturation. Low 
exiting currents.

F, L, P, R, T

Ungapped Pot cores, E, U & I cores, 
Toroids, EP cores, RS cores, DS cores,  
PQ cores, Planar cores

Pulse Transformers

High µ, low loss, high B saturation.

J, W, M

Toroids

Telecom Inductors

Low losses, high temperature stability, good 
stability across load conditions.

F, P, R, T

Pot cores, EP cores, E cores, RM cores, 
Planar cores

ADVANTAGES OF MAGNETICS’ FERRITES

•    The widest range of toroid sizes in power and high 

permeability materials

•  Superior toroid coatings available in epoxy and 

Parylene C

•  Standard gapping to precise inductance or mechanical 

dimension: wide range of coil former and assembly 

hardware available

• The full range of standard planar E and I cores
• Rapid prototyping capability for new development

Magnetics-2021-Ferrite-Catalog-html.html
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3

INDUCTORS & POWER  

TRANSFORMERS

EMI/RFI FILTERS  

& BROADBAND  

TRANSFORMERS

LINEAR FILTERS  

& SENSORS

MATERIAL

L

R

P

F

T

J

W

M

C

E

V

Initial Permeability

µ

i

750  

±25%

2,300  

±25%

2,500  

±25%

3,000  

±20%

3,000  

±25%

5,000  

±20%

10,000  

±30%

15,000

±30%

900  

±25%

2,000  

±25%

2,300  

±25%

Maximum Usable  
Frequency (50% roll-off) 

f

MHz

6

1.8

1.8

1.5

1.5 

0.7

0.5

0.12

8

3

1.5

Relative Loss Factor 
X 10

-6

  25˚C

tan 

d

µ

iac

15  

100 kHz

7  

10 kHz

10  

10 kHz

10  

 300 

kHz   

3  

100 

kHz  

5   

100 

kHz   

Curie Temperature 

T

c

˚C 

>280 

>210 

>210 

>210 

>220

>145

>135

>130

> 200

>160

>170

Flux Density @ 1,194 
A/m (15 Oe) 25˚C

B

m

 

10 kHz

G                              

mT

5,200                   

520

4,700                

470

4,700                

470

4,700          

470

5,300             

530

4,300          

430

3,900          

390

4,700

470

3,800                  

380

3,600                  

360

4,400          

440

Remanence 
25˚C

B

r

G                        

mT

1,500               

150

1,600               

160

1,600               

160

1,500               

150

1,500               

150

1,000               

100

800               

80

2,700

270

1,500               

150

700               

70

1,500               

150

Power Loss (PL) Sine 
Wave in mW/cm

3

 

(typical)

25 kHz 

200 mT 

(2,000 G)

  @25˚C     

90

180

60

80

@60˚C

65

110

55

75

@100˚C

60

65

90

70

@120˚C

65

110

125

75

100 kHz 

100 mT 

(1,000 G)

  @25˚C     

87

70

70

65

@60˚C

64

50

65

57

@100˚C

58

65

110

55

@120˚C

64

45

150

58

500 kHz 

50 mT 

(500 G)

  @25˚C     

290

 

@60˚C

150

 

@100˚C

115

175

300

150

@120˚C

130

Resistivity

r

Q

-m

10

5

5

5

5

0.5

0.1

0.5

2

2

1

Density

d

g/cm

3

4.8

4.8

4.8

4.8

4.8

4.8

4.9

5.0

4.7

4.7

4.8

Ferrite Materials

Magnetics-2021-Ferrite-Catalog-html.html
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MAGNETICS

4

TYPICAL MECHANICAL PROPERTIES OF FERRITE MATERIALS

MECHANICAL DATA

UNITS

THERMAL DATA

UNITS

Bulk Density

4.85

g/cm

3

Coefficient of Linear Expansion

10.5x10

-6

°C

-1

Tensile Strength

5.0, 7.0x10

3

kgf.mm

-2

, lbs.in

-2

Specific Heat (25°)

800

J/kgK

Compressive Strength

45, 63x10

3

kgf.mm

-2

, lbs.in

-2

Thermal Conductivity (25-85°C)

3500-4300

µW.mm

-1

.°C

-1

Youngs Modulus

12.4x10

3

,1.8x10

7

kgf.mm

-2

, lbs.in

-2

35-43

mW.cm

-1

.°C

-1

Hardness (Knoop)

650 Typical

.0083-.010

cal.s

-1

.cm

-1

.°C

-1

Resistivity

10

2

-10

3

ohm-cm

Ferrite Materials

Magnetics-2021-Ferrite-Catalog-html.html
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5

Initial Perm (25°C; 

^

10 kHz). . . . . . . . . . . . . . . . . . . . . . . . .

2,300 ± 25%

Saturation Flux Density (4,700 G at 15 Oe, 25°C)  . . . . . . . .470 mT, 11.9 A·T/cm
Curie Temperature  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210°C

A medium frequency multi-purpose power transformer, 
inductor and filter material. Widely available in shapes and 
toroids. Engineered for lowest losses between 90 - 100°C.

R Material

FLUX DENSITY vs. TEMPERATURE

TEMPERATURE (˚C)

20

40

60

80

100

120

140

(mT)

H =11.9 A·T/cm

500

400

300

B

sat

350

450

1000

2000

100

10

100

30

300

CORE LOSS vs. FLUX DENSITY AT 100° C

FLUX DENSITY (mT)

50

0k

Hz

20

0k

Hz

10

0k

Hz

25

kH

z

CORE LOSS

mW

cm

3

PERMEABILITY vs. TEMPERATURE

5000

6000

4000

3000

2000

1000

0

PE

RM

EA

BIL

ITY

)

-50

0

50

100

150

200

250

TEMPERATURE (˚C)

TYPICAL B-H LOOPS

R Material

H (A/m)

-25

0

25

50

150

250

B

(mT)

500

400

300

200

100

0

100(˚C)

25(˚C)

CORE LOSS vs. TEMPERATURE

TEMPERATURE (˚C)

0

20

40

60

80

100

120

CORE LOSS

mW

cm

3

300
250

200

150

100

50

0

100mT @ 

100kHz

FREQUENCY (kHz)

PE

RM

EA

BIL

ITY

)

3500

2000

2500

1500
1000

0

10

100

1000

2000

3000

500

PERMEABILITY vs. FREQUENCY

0

0

100

200

300

400

6000

4000

2000

FLUX DENSITY (mT)

PE

RM

EA

BIL

ITY

)

PERMEABILITY vs. FLUX DENSITY

100(˚C)

25(˚C)

Magnetics-2021-Ferrite-Catalog-html.html
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MAGNETICS

6

TYPICAL B-H LOOPS

P Material

H (A/m)

-25

0

25

50

150

250

B

(mT)

500

400

300

200

100

0

100(˚C)

25(˚C)

A low-medium frequency general-purpose power converter 
material.  Engineered for lowest losses between 80 - 100°C. 
Available in almost all core sizes and shapes.

Initial Perm (25°C; 

^

10 kHz). . . . . . . . . . . . . . . . . . . . . . . .

2,500 ± 25%

Saturation Flux Density (4,700 G at 15 Oe, 25°C)  . . . . . . . .470 mT, 11.9 A·T/cm
Curie Temperature  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210°C

P Material

PERMEABILITY vs. FLUX DENSITY

100(˚C)

25(˚C)

0

0

100

200

300

400

6000

4000

2000

FLUX DENSITY (mT)

PE

RM

EA

BIL

ITY

)

PERMEABILITY vs. TEMPERATURE

TEMPERATURE (˚C)

5000

4000

3000

2000

1000

0

-50

0

50

100

250

200

150

PE

RM

EA

BIL

ITY

)

CORE LOSS vs. TEMPERATURE

TEMPERATURE (˚C)

0

20

40

60

80

100

120

CORE LOSS

mW

cm

3

100mT @ 

100kHz

300

250

200

150

100

50

0

FREQUENCY (kHz)

PE

RM

EA

BIL

ITY

)

4000

3000

2000

1000

0

10

100

1000

5000

PERMEABILITY vs. FREQUENCY

500

450

400

350

300

B

sat

FLUX DENSITY vs. TEMPERATURE

TEMPERATURE (˚C)

20

40

60

80

100

120

140

(mT)

H =11.9 A·T/cm

1000

2000

100

10

100

30

300

CORE LOSS vs. FLUX DENSITY AT 100° C

FLUX DENSITY (mT)

50

0k

Hz

40

0k

Hz

20

0k

Hz

10

0k

Hz

50

kH

z

25

kH

z

CORE LOSS

mW

cm

3

Magnetics-2021-Ferrite-Catalog-html.html
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7

F Material

Initial Perm (25°C; 

^

10 kHz). . . . . . . . . . . . . . . . . . . . . . . . .

3,000 ± 20%

Saturation Flux Density (4,700 G at 15 Oe, 25°C)  . . . . . . . .470 mT, 11.9 A·T/cm
Curie Temperature  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210°C

A medium frequency general-purpose power 
transformer, inductor and filter material. Slightly higher 
in perm than P or R Material. Engineered for lowest 
losses between 50 - 80°C.

CORE LOSS vs. TEMPERATURE

TEMPERATURE (˚C)

0

20

40

60

80

100

120

CORE LOSS

mW

cm

3

300
250

200

150

100

50

0

100mT @ 

100kHz

6000
5000

4000

3000

2000

1000

0

-50

0

50

100

150

250

200

PERMEABILITY vs. TEMPERATURE

TEMPERATURE (˚C)

PE

RM

EA

BIL

ITY

)

0

0

100

200

300

400

6000

4000

2000

FLUX DENSITY (mT)

PE

RM

EA

BIL

ITY

)

100(˚C)

25(˚C)

PERMEABILITY vs. FLUX DENSITY

PERMEABILITY vs. FREQUENCY

4000

3000

2000

1000

0

10

100

1000

5000

FREQUENCY (kHz)

PE

RM

EA

BIL

ITY

)

1000

2000

100

10

100

30

300

CORE LOSS vs. FLUX DENSITY AT 100° C

FLUX DENSITY (mT)

30

0kH

z

20

0kH

z

10

0k

Hz

50

kH

z

25

kH

z

CORE LOSS

mW

cm

3

500

450

400

350

300

250
200

B

sat

FLUX DENSITY vs. TEMPERATURE

TEMPERATURE (˚C)

0

20

40

60

80

100

120

(mT)

H =11.9 A·T/cm

TYPICAL B-H LOOPS

H (A/m)

-25

0

25

50

150

250

B

(mT)

500

400

300

200

100

0

100(˚C)

25(˚C)

Magnetics-2021-Ferrite-Catalog-html.html
background image

MAGNETICS

8

20

0k

Hz

10

0k

Hz

40

0kH

z

CORE LOSS

mW

cm

3

1000

2000

3000

100

10

100

30

300

CORE LOSS vs. FLUX DENSITY AT 100° C

FLUX DENSITY (mT)

Initial Perm (25°C; 

^

10 kHz). . . . . . . . . . . . . . . . . . . . . . . . .

3,000 ± 25%

Saturation Flux Density (5,300 G at 15 Oe, 25°C)  . . . . . . . .530 mT, 11.9 A·T/cm
Curie Temperature  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220°C

A power material for transformers and inductors operating 
from 20 kHz to 750 kHz.  T material offers stability in both 
perm and losses over a wide temperature range.

T Material

3000
2500

3500

2000

0

10

1

100

1000 2000

4000

4500

1000

500

1500

FREQUENCY (kHz)

PE

RM

EA

BIL

ITY

)

PERMEABILITY vs. FREQUENCY

0

0

100

200

300

400

6000

4000

2000

FLUX DENSITY (mT)

PE

RM

EA

BIL

ITY

)

100(˚C)

25(˚C)

PERMEABILITY vs. FLUX DENSITY

TYPICAL B-H LOOPS

T Material

H (A/m)

-25

0

25

50

150

250

B

(mT)

500

400

300

200

100

0

100(˚C)

25(˚C)

PE

RM

EA

BIL

ITY

)

4000

3000

2000

1000

0

-50

50

100

150

250

200

0

TEMPERATURE (˚C)

PERMEABILITY vs. TEMPERATURE

0

20

40

60

80

100

120

300
250

200

150

100

50

0

100mT @ 

100kHz

CORE LOSS vs. TEMPERATURE

TEMPERATURE (˚C)

CORE LOSS

mW

cm

3

600

500

400

300

200

100

0

B

sat

FLUX DENSITY vs. TEMPERATURE

TEMPERATURE (˚C)

0

20

40

60

80

100

160

140

120

(mT)

H =11.9 A·T/cm

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9

A high-frequency high-temperature power material.  
L material is optimized for transformers and inductors 
from 500 kHz – 3 MHz. Core losses are minimized 
between 70 – 100°C.

L Material

Initial Perm (25°C; 

^

10 kHz). . . . . . . . . . . . . . . . . . . . . . . . . . .

750 ± 25%

Saturation Flux Density (5,200 G at 15 Oe, 25°C)  . . . . . . . . . 520 mT, 12 A·T/cm
Curie Temperature  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280°C

0

0

200

100

300

400

2500

1500

2000

1000

500

FLUX DENSITY (mT)

PE

RM

EA

BIL

ITY

)

500

PERMEABILITY vs. FLUX DENSITY

100(˚C)

25(˚C)

1400

800

600

1200

1000

400

200

0

0

100

200

300

PERMEABILITY vs. TEMPERATURE

TEMPERATURE (˚C)

PE

RM

EA

BIL

ITY

)

0

20

40

60

80

100

140

120

600

700

300

400

500

200

100

TEMPERATURE (˚C)

CO

RE

 LO

SS

1 MHz

50 mT

3 MHz

10 mT

3 MHz

30 mT

mW

cm

3

CORE LOSS vs. TEMPERATURE

100

1000

10000

10000

100

1000

FREQUENCY (kHz)

PE

RM

EA

BIL

ITY

)

PERMEABILITY vs. FREQUENCY

10

1

1

10

100

1000

100

FLUX DENSITY (mT)

CO

RE

 LO

SS

mW

cm

3

CORE LOSS vs. FLUX DENSITY AT 100˚C

1 MHz

2 MHz

3 MHz

TYPICAL B-H LOOPS

L Material

 100

0

200

300

B

(mT)

500

400

300

200

100

0

H (A/m)

25(˚C)

100(˚C)

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MAGNETICS

10

Initial Perm (25°C; 

^

10 kHz), Uncoated  . . . . . . . . . . . . . . . . . . .

900 ± 25%

Saturation Flux Density. . . . . . . . 380 mT, 11.9 A·T/cm (3,800 G at 25°C, 15 Oe)
Curie Temperature  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200°C

C Material

0

200

400

600

-50

0

50

100

150

200

250

800

1000

1200

TEMPERATURE (˚C)

PE

RM

EA

BIL

ITY

)

PERMEABILITY vs. TEMPERATURE

0

200

400

600

10

100

1000

10000

800

1000

FREQUENCY (kHz)

PE

RM

EA

BIL

ITY

)

PERMEABILITY vs. FREQUENCY

C Material works well for Telecom Filters, Wideband, Matching 
and Pulse transformer applications, and High Q inductors.

TYPICAL B-H LOOPS

C Material

H (A/m)

-50

0

50

100

500

1000

B

(mT)

500

400

300

200

100

0

100(˚C)

25(˚C)

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11

E Material

0

1000

-50

50

0

100

150

200

250

2000

3000

TEMPERATURE (˚C)

PE

RM

EA

BIL

ITY

)

PERMEABILITY vs. TEMPERATURE

0

500

1000

1500

10

10

100

3000

1000

2000

2500

FREQUENCY (kHz)

PE

RM

EA

BIL

ITY

)

PERMEABILITY vs. FREQUENCY

E Material works well for Telecom Filters, Wideband, Matching 
and Pulse transformer applications, and High Q inductors.

TYPICAL B-H LOOPS

E Material

H (A/m)

-25

0

25

50

150

250

B

(mT)

500

400

300

200

100

0

100(˚C)

25(˚C)

Initial Perm (25°C; 

^

10 kHz), Uncoated  . . . . . . . . . . . . . . . . .

2,000 ± 25%

Saturation Flux Density. . . . . . . . 360 mT, 11.9 A·T/cm (3,600 G at 25°C, 15 Oe)
Curie Temperature  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160°C

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MAGNETICS

12

V Material

0

1000

-50

0

50

100

150

200

2000

3000

4000

TEMPERATURE (˚C)

PE

RM

EA

BIL

ITY

)

PERMEABILITY vs. TEMPERATURE

0

500

1000

1500

1

100

10

4000

1000

2000

2500

3000

FREQUENCY (kHz)

PE

RM

EA

BIL

ITY

)

PERMEABILITY vs. FREQUENCY

V Material works well for Telecom Filters, Wideband, Matching 
and Pulse transformer applications, and High Q inductors.

TYPICAL B-H LOOPS

V Material

H (A/m)

-25

0

25

50

150

250

B

(mT)

500

400

300

200

100

0

100(˚C)

25(˚C)

Initial Perm (25°C; 

^

10 kHz), Uncoated  . . . . . . . . . . . . . . . . .

2,300 ± 25%

Saturation Flux Density. . . . . . . . 440 mT, 11.9 A·T/cm (4,400 G at 25°C, 15 Oe)
Curie Temperature  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170°C

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13

A medium perm general-purpose material. Well suited 
both for EMI/RFI filtering and broadband transformers.

J Material

Initial Perm (25°C; 

^

10 kHz). . . . . . . . . . . . . . . . . . . . . . . . .

5,000 ± 20%

Saturation Flux Density (4,300 G at 15 Oe, 25°C)  . . . . . . . .430 mT, 11.9 A·T/cm
Curie Temperature  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145°C

PERMEABILITY vs. TEMPERATURE

TEMPERATURE (˚C)

PE

RM

EA

BIL

ITY

)

4000

6000

2000

10000

8000

14000

12000

0

-50

150

50

0

100

PERMEABILITY vs. DC BIAS

H (A/M)

PE

RM

EA

BIL

ITY

)

1000

100

10

1

1000

10

100

PERMEABILITY vs. FREQUENCY

FREQUENCY (kHz)

PE

RM

EA

BIL

ITY

)

5000

2000

3000

4000

7000

8000

1000

0

10

100

1000

6000

TYPICAL  B-H LOOPS

J Material

H (A/m)

-25

0

25

50

150

250

B

(mT)

500

400

300

200

100

0

100(˚C)

25(˚C)

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MAGNETICS

14

A high permeability material used for EMI/RFI 
suppression, common mode chokes, pulse and 
broadband transformers.

W Material

Initial Perm (25°C; 

^

10 kHz)  . . . . . . . . . . . . . . . . . . . . . . .

10,000 ± 30%

Saturation Flux Density (3,900 G at 15 Oe, 25°C) . . . . . . .390 mT, 11.9 A·T/cm
Curie Temperature  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135°C

PERMEABILITY vs. TEMPERATURE

TEMPERATURE (˚C)

PE

RM

EA

BIL

ITY

)

20000

4000

8000

16000

12000

0

-50

150

-25

0

25

50

75 100 125

PERMEABILITY vs. DC BIAS

H (A/m)

PE

RM

EA

BIL

ITY

)

1000

100

1

100

1000

10000

10

PERMEABILITY vs. FREQUENCY

FREQUENCY (kHz)

PE

RM

EA

BIL

ITY

)

4000

8000

10000

6000

12000

0

10

100

1000

2000

14000

TYPICAL B-H LOOPS

W Material

H (A/m)

-50

0

50

100

200

150

250

B

(mT)

500

400

300

200

100

0

100(˚C)

25(˚C)

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15

Highest permeability material used for EMI/RFI 
suppression, common mode chokes, pulse and 
broadband transformers.

M Material

Initial Perm (25°C; 

^

10 kHz). . . . . . . . . . . . . . . . . . . . . . . .

15,000 ± 30%

Saturation Flux Density (4,700 G at 15 Oe, 25°C)  . . . . . . . .470 mT, 11.9 A·T/cm
Curie Temperature  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130°C

TYPICAL B-H LOOPS

M Material

H (A/m)

-50

0

50

100

200

150

250

B

(mT)

500

400

300

200

100

0

100(˚C)

25(˚C)

5000

15000

10000

25000

20000

0

-40

130 140

50 70

30

-30 -10 10

90 110

PERMEABILITY vs. TEMPERATURE

TEMPERATURE (˚C)

PE

RM

EA

BIL

ITY

)

10

100

1000

100000

10000

1

10

100

1000

PERMEABILITY vs. DC BIAS

H (A/m)

PE

RM

EA

BIL

ITY

 (µ

)

100

1000

20000

10000

1

10

100

1000

PERMEABILITY vs. FREQUENCY

FREQUENCY (kHz)

PE

RM

EA

BIL

ITY

)

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MAGNETICS

16

Gapping for A

L

Inductors are commonly designed with an airgap in the magnetic path where the center 
legs or center posts of two ferrite pieces meet. This airgap allows the inductance to be 
controlled to a tight tolerance, and it allows the inductor to support a defined level of 
DC current without saturating. Inductors are commonly designed with an airgap in the 
magnetic path where the center legs or center posts of two ferrite pieces meet. This 
airgap allows the inductance to be controlled to a tight tolerance, and it allows the 
inductor to support a defined level of DC current without saturating. In most applications, 
defining the gap with the A

results in inductors with the least variation.

When specifying and ordering E cores (including EC, EFD, EER, ETD, and Planar E 
cores) gapped to an A

L

, it is important to note which cores are produced in gap-to-gap 

combination, because two gapped pieces are assembled to achieve the A

L

. Alternatively, 

for E cores provided ungapped-to-gap, an ungapped piece must be used with a gapped 
piece to achieve the A

L

. Pot, RS, DS, RM, PQ, and EP cores are sold as sets whether the 

combination is gap-to-gap or ungapped-to-gap.
A

L

 testing and limits are calculated to three significant digits based on the nominal value. 

For example, A

L

=99±3% is interpreted as 96.0 Minimum, 99.0 Nominal, and 102.0 

Maximum.
Magnetics tests gapped A

L

 values with full bobbins, usually 100 turns, or 250 turns for 

deep gaps. The drive level is low (0.5 mT) and the frequency is set low enough to avoid 
resonance effects. Measured inductance in an application may vary significantly from the 
theoretical value due to low turns, low bobbin fill, leakage effects, resonance effects, or 
elevated drive levels.
It is important for users to verify the correlation between the test of the core and the 
specific test being applied to the inductor or transformer. Planar E cores, Planar RM, and 
Planar PQ cores are especially susceptible to correlation discrepancies.

Gapping for Depth of Grind

Even though controlling A

L

 is usually the way to get the best consistency in finished 

inductor performance, in some cases the best results are seen when the depth of grind 
is specified instead. This is generally in cases where the gap dimension is quite large 
(the A

L

 is low), because variation in the inductance of the wound device is dominated by 

variation in the windings, especially if the number of turns is low.
For parts ordered in pieces (E cores), the depth of grind is given for each piece. To make 
an ungapped-to-gap set, use one piece of each. For example, use 0R41808G050 
with 0R41808EC for an asymmetrical gap of 0.050”± 0.001. For the same gap, but 
symmetrical, use two pieces of 0R41808G025.
For parts ordered in sets, the depth of grind is given as a total for the set, and may be 
ungapped-to-gap core pieces or gap-to-gap.

Part Number

0P44317 A450

Same as for ungapped cores
Gap Code

Gap Code

The letter indicates the type of gap and a three-digit number defines the value. 

Gap-to-Gap vs Ungapped-to-Gap Core Sets

“Gap-to-gap combination” means the gap is symmetrical. Half of the total gap is 
removed from each piece.
“Ungapped-to-gap combination” means an asymmetrical gap; the entire gap is taken 
from one piece, and the other piece is ungapped. 
For an E-core gapped to an A

L

 value when mated with the standard I-core, add “-EI” to 

the end of the part number.

CODE

MEANING

EXAMPLE

A_ _ _

A

L

 (if <1000)

DF42311

A275

 

(A

L

=275)

X_ _ _

A

L

 

if 1000 or greater 

(add 1000 to code)

OP44721

X250

 

(A

L

=1250)

F_ _ _

A

L

 

if <100, non-integer 

(divide code by 10)

OR42510

F807

 

(A

L

=80.7)

G_ _ _

Depth of Grind

 in mils 

(1000

ths

 of an inch)

OF44317

G079

 

(Gap=0.079”)

M_ _ _

Depth of Grind,

 mm 

(divide code by 10)

OF43019

M015

 

(Gap=1.5 mm)

Gapped Cores

 

How To Order

A

L

 is inductance factor, mH/1000 Turns, or nH/T².  

Either the A

L

 or the depth of grind (not both) is controlled during production of  

gapped cores. 
See the chart on pages 17-19 for tolerances.

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17

Gapped Cores

  

Depth of Grind Tolerances

Tolerance Ranges for Pot, RS, DS, RM, PQ, and EP cores

Tolerance Ranges for E, EC, ER, EER, EFD, ETD and Planar E cores

INCHES

MILLIMETERS

GAP

TOLERANCE 

40 mm

TOLERANCE 

40 mm  to  

60 mm

TOLERANCE 

≥ 

60 mm

GAP

TOLERANCE

GAP CONDITION

0.001”– 0.038”

± 0.0005”

± 0.00075”

± 0.001”

0.1 mm – 0.9 mm

± 0.03 mm

Ungapped to gap combination

0.039”– 0.076”

± 0.001”

± 0.0015”

± 0.002”

1.0 mm – 1.9 mm

± 0.04 mm

Ungapped to gap combination  
(Except if the gap is more than 10% of the minimum 
bobbin depth for the set*, then gap-to-gap combination.)

0.077”– 0.114”

± 0.002”

± 0.003”

± 0.004”

2.0 mm – 2.9 mm

± 0.07 mm

Gap to gap combination  
(Except if the gap is less than 10% of the minimum bobbin 
depth for the set*, then ungapped-to-gap combination.)

0.115”– 0.152”

± 0.002”

± 0.003”

± 0.004”

3.0 mm – 3.8 mm

± 0.07 mm

Gap to gap combination

0.153”– 0.228”

± 0.004”

± 0.006”

± 0.008”

3.9 mm – 5.0 mm

± 0.12 mm

Gap to gap combination

INCHES

MILLIMETERS

GAP 

TOLERANCE 

40 mm

TOLERANCE 

40 mm  to 

60 mm

TOLERANCE 

≥ 

60 mm

GAP

TOLERANCE

0.001”– 0.038”

± 0.0005”

± 0.00075”

± 0.001”

0.1 mm – 0.9 mm

± 0.03 mm

0.039”– 0.076”

± 0.001”

± 0.0015”

± 0.002”

1.0 mm – 1.9 mm

± 0.04 mm

0.077”– 0.152”

± 0.002”

± 0.003”

± 0.004”

2.0 mm – 3.8 mm

± 0.07 mm

0.153”– 0.228”

± 0.004”

± 0.006”

± 0.008”

3.9 mm – 5.0 mm

± 0.12 mm

*The bobbin depth for the set is the 2D dimension or 2 times the D dimension

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MAGNETICS

18

Gapped Cores

A

L

 Value Tolerances

SIZE

GAP TO 

GAP ±3%

 

UNGAPPED TO GAP COMBINATION

±3%

±5%

±7%

±10%

PLANAR E CORES*

  

PAGES 32 - 35

41425

19-35

36-76

122

166

228

41434

17-31

32-77

123

167

230

41805

18-32

33-205

329

448

617

42107

35-66

67-188

304

414

569

42216

78-141

142-405

656

892

1239

43208

118-216

217-643

1040

1427

1964

43618

119-222

223-673

1088

1491

1999

43808

173-315

316-956

1547

1999

44008

106-189

190-507

821

1116

1548

44308

201-367

368-1130

1828

1999

44310

169-305

306-1130

1828

1999

45810

266-481

482-1496

1999

46410

379-701

702-1999

49938

336-594

595-1999

ER CORES*                                                   

PAGES 36 - 37

40906

15-65

66-70

110

150

200

41126

40-74

75-100

140

190

275

41426

45-84

85-130

190

250

380

41826

50-84

85-200

325

445

650

42313

55-90

91-200

525

710

900

43021

80-169

170-710

1050

1460

1975

EER/ETD CORES

PAGES 44 - 45/48 - 49

43434

55-88

89-500

806

1095

1507

43521

54-86

87-566

913

1241

1707

43939

95-156

157-641

1028

1398

1935

44216

71-117

118-876

1415

1925

1999

44444

73-117

118-881

1423

1935

1999

44949

81-130

131-1075

1736

1999

45959

51-118

119-1822

1999

EFD CORES                                                   

PAGES 46 - 47

41212

18-29

30-90

130

170

230

41515

19-30

31-81

127

172

236

42019

29-45

46-220

350

430

575

42523

41-66

67-296

475

646

888

43030

50-90

91-450

790

975

1125

SIZE

GAP TO 

GAP ± 3%

 

UNGAPPED TO GAP COMBINATION

±3%

±5%

±7%

±10%

E CORES*

PAGES 28 - 31

41203

16-27

28-55

86

117

160

41205

28-47

48-107

170

229

316

41707

22-37

38-89

140

190

259

41808

27-42

43-121

192

258

355

41810

44-74

75-235

376

512

704

42510

37-61

62-200

318

432

595

42515

28-43

44-210

333

452

616

42520

107-190

191-397

643

874

1202

42530

45-72

73-409

655

891

1225

43007

42-67

68-307

491

668

919

43009

55-91

92-222

353

475

653

43515

54-87

88-429

687

934

1284

43520

65-111

112-461

738

1003

-1380

44011

59-95

96-642

1029

1400

1940

44016

52-83

84-545

872

1185

1629

44020

78-126

127-916

1480

1999

44022

94-156

157-1187

1903

1999

44317

81-136

137-762

1222

1676

1999

44721

107-180

181-1188

1920

1999

45528

113-186

187-500

1999

45530

150-360

361-600

1999

45724

129-218

219-450

1999

46016

102-129

130-1231

1999

46527

142-235

236-650

 1999

47133

150-285

286-950

1999

47228

120-199

200-1823

1999

48020

99-158

159-1922

1999

49928

150-285

286-975

1999

EC CORES                                                     

PAGES 42 - 43

43517

49-79

80-438

702

954

1312

44119

61-98

99-627

1004

1365

1891

45224

76-123

124-911

1471

1999

47035

83-135

136-1403

1999

*These tolerances also apply to E-I combination.  

Magnetics-2021-Ferrite-Catalog-html.html
background image

www.mag-inc.com

19

Gapped Cores

A

L

 Value Tolerances

Chart shows type of combination and the guaranteed tolerance for corresponding A

L

 ranges. Ranges indicated are the tolerances for standard gaps. For ± 5%, ± 7%, and ± 10%, the maximum A

L

 for each is shown. Standard cores 

are manufactured to the smallest allowed tolerances. EE and EI tolerances are identical.

SIZE

GAP TO 

GAP ± 3%

 

UNGAPPED TO GAP COMBINATION

±3%

±5%

±7%

±10%

EP CORES                                                     

PAGES 52 - 53

40707

25-50

51-75

125

160

41010

25-55

56-75

125

160

41313

25-75

76-110

175

275

315

41717

25-100

101-175

275

400

630

42120

25-180

181-450

630

850

1250

POT CORES

PAGES 54 - 55

40704

25-35

36-62

95

125

175

40905

25-48

49-87

135

180

240

41107

25-75

76-135

220

285

399

41408

71-113

114-210

307

417

574

41811

96-174

175-326

523

712

988

41814

65-135

136-340

510

700

980

42213

113-204

205-482

779

1060

1459

42616

139-249

250-695

1125

1543

1999

43019

170-304

305-1015

1642

1999

43622

222-399

400-1494

1999

44229

169-389

390-1965

1999

RS (ROUND-SLAB) CORES

                         

PAGES 56 - 57

41408

25-177

283

385

530

41811

25-39

40-270

400

525

800

42311

25-39

40-347

708

963

1325

42318

25-39

40-452

731

994

1378

42616

25-39

40-622

998

1369

1884

43019

25-62

63-918

1485

1999

43622

40-62

63-1286

1999

44229

40-62

63-1732

1999

SIZE

GAP TO 

GAP ± 3%

 

UNGAPPED TO GAP COMBINATION

±3%

±5%

±7%

±10%

DS (DOUBLE SLAB) CORES

                           

PAGES 56 - 57

42311

109-195

196-386

625

850

1170

42318

78-135

136-441

706

961

1332

42616

117-205

206-580

930

1276

1756

43019

149-264

265-873

1412

1922

1999

43622

170-300

301-1111

1797

1999

44229

179-315

316-1543

1999

PQ CORES

PAGES 58 - 59

42016

60-184

185-467

755

1027

1425

42020

50-139

140-467

754

1026

1422

42610

200-396

397-777

1258

1728

1999

42614

110-334

335-645

1044

1421

1972

42620

95-296

297-888

1436

1955

1999

42625

77-234

235-880

1423

1936

1999

43214

127-416

417-548

885

1207

1661

43220

128-409

410-486

1369

1878

1999

43230

84-241

242-808

1305

1775

1999

43535

89-255

256-980

1575

1999

44040

83-230

231-1006

1625

1999

45050

128-210

210-1999

RM CORES

 

PAGES 60 - 61

41110

25-50

51-55

75

170

250

41510

56-98

99-162

258

352

484

41812

69-120

121-238

381

519

714

41912

69-120

121-238

381

519

714

42316

84-150

151-395

633

862

1195

42819

126-200

201-625

1002

1374

1892

43723

145-250

251-977

1580

1999

Magnetics-2021-Ferrite-Catalog-html.html
background image

MAGNETICS

20

Toroids

2.54 mm – 12.7 mm

Ferrite toroids offer high magnetic efficiency as there is no air gap, and the cross sectional 
area is uniform. Available in many sizes (O.D. from 2.54 mm to 140 mm) and materials 
(permeabilities ranging from 750 to 15,000), this section lists common sizes.

Typical applications for high permeability toroids (J, W, and M materials) include common mode 
chokes, broadband transformers, pulse transformers and current transformers. L, R, P, F and T 
material toroids are excellent choices for high frequency transformers.

NOMINAL A

L

 (mH/1000T)

SIZE (mm)

ORDERING CODE

Y

Z L

 

± 25% R ± 25% P ± 25% F ± 20% T ± 25% J ± 20% W ± 30% M ± 30% C ± 25%

2.54 x 1.27 x 1.27

0_40200TC

P

400

454

525

875

1,750

158

3.46 x 1.78 x 1.27

0_40301TC

P

380

410

495

825

1,650

149

3.94 x 2.24 x 1.27

0_40502TC

P

340

368

440

735

1,470

2,152

129

3.94 x 2.24 x 2.54

0_40503TC

P

670

716

885

1,475

2,950

258

4.83 x 2.29 x 1.27

0_40401TC

P

440

474

570

950

1,900

170

4.83 x 2.29 x 2.54

0_40402TC

P

870

948

1,140

1,900

3,800

341

5.84 x 3.05 x 1.52

0_40601TC

P

178

450

488

585

592

980

1,960

2,963

177

5.84 x 3.05 x 3.18

0_40603TC

P

372

940

1,020

1,225

2,040

4,080

6,199

372

7.62 x 3.18 x 4.78

0_40705TC

P

751

1,920

2,088

2,505

4,175

8,350

12,535

751

9.53 x 5.59 x 7.11

0_40907TC

P P

683

1,730

1,884

2,260

3,765

7,530

683

9.53 x 4.75 x 3.18

0_41003TC

P P

399

1,000

1,095

1,314

1,330

2,196

4,392

6,644

399

9.53 x 4.75 x 4.78

0_41005TC

P P

599

1,510

1,650

1,980

3,308

6,616

9,988

599

12.7 x 5.16 x 6.35

0_41206TC

P P

1,029

2,600

2,820

3,384

5,640

11,280

17,163

1,029

12.7 x 8.14 x 3.18

0_41303TC

P

255

680

745

894

1,488

2,976

254

12.7 x 8.14 x 3.89

0_41304TC

P

311

850

931

1,116

1,860

3,720

311

12.7 x 8.14 x 5.08

0_41305TC

P

407

1,090

1,190

1,430

2,380

4,760

406

12.7 x 8.14 x 6.35

0_41306TC

P

508

1,360

1,485

1,782

1,700

2,968

5,936

8,476

508

HOW TO ORDER

O J 4 14 06 TC

Coating code 
Ferrite core material
Used for all ferrite types
Approximate diameter in mm
Approximate height in mm
Geometry code

Coating 

Code

Coating 

Material

Temperature 

Rating

Voltage Breakdown 

(wire to wire)

0

Bare Core

N/A

N/A

Y

Parylene

130°C

600V

Z

Epoxy

200°C

1000V

Magnetics-2021-Ferrite-Catalog-html.html
background image

www.mag-inc.com

21

MAGNETIC DATA

HARDWARE

SIZE (mm)

ORDERING CODE

I

(mm)

A

(mm

2

)

V

(mm

3

)

Window 

Area

 

(cm

2

)

WaAc 

(cm

4

)

Weight 

(grams per piece)

Headers & Mounts

2.54 x 1.27 x 1.27

0_40200TC

5.5

0.77

4.3

0.01

0.0001

0.03

SMH07058A

3.46 x 1.78 x 1.27

0_40301TC

7.65

1.03

7.87

0.02

0.0003

0.04

SMH07058A

3.94 x 2.24 x 1.27

0_40502TC

9.2

1.05

9.7

0.03

0.0004

0.05

SMH07058A

3.94 x 2.24 x 2.54

0_40503TC

9.2

2.1

19.4

0.03

0.0008

0.10

SMH07058A

4.83 x 2.29 x 1.27

0_40401TC

10.2

1.5

15.7

0.04

0.0006

0.09

SMH07058A

4.83 x 2.29 x 2.54

0_40402TC

10.2

3.1

31.5

0.04

0.001

0.17

SMH07058A

5.84 x 3.05 x 1.52

0_40601TC

13.0

2.0

26.7

0.07

0.001

0.14

SMH07058A

5.84 x 3.05 x 3.18

0_40603TC

13.0

4.3

56.0

0.07

0.003

0.30

SMH07058A

7.62 x 3.18 x 4.78

0_40705TC

15.0

9.9

149

0.07

0.008

0.90

SMH07058A

9.53 x 5.59 x 7.11

0_40907TC

22.7

13.7

310

0.24

0.03

1.60

9.53 x 4.75 x 3.18

0_41003TC

20.7

7.3

151

0.17

0.01

0.82

9.53 x 4.75 x 4.78

0_41005TC

20.7

10.9

227

0.17

0.02

1.20

12.7 x 5.16 x 6.35

0_41206TC

25.0

22.0

550

0.20

0.05

3.30

12.7 x 8.14 x 3.18

0_41303TC

31.7

7.1

226

0.49

0.04

1.20

12.7 x 8.14 x 3.89

0_41304TC

31.7

8.7

276

0.49

0.05

1.44

12.7 x 8.14 x 5.08

0_41305TC

31.7

11.4

361

0.49

0.06

1.90

12.7 x 8.14 x 6.35

0_41306TC

31.7

14.2

451

0.49

0.07

2.40

BARE NOMINAL DIMENSIONS (mm)              

Y/Z COATED LIMITING DIMENSIONS (mm)

SIZE (mm)

ORDERING CODE

OD (A)

ID (B)

HT (C)

COATING

OD max

ID min

HT max

2.54 x 1.27 x 1.27

0_40200TC

2.54

1.27

1.27

Y

2.79

1.02

1.52

3.46 x 1.78 x 1.27

0_40301TC

3.46

1.78

1.27

Y

3.79

1.54

1.53

3.94 x 2.24 x 1.27

0_40502TC

3.94

2.24

1.27

Y

4.22

1.95

1.53

3.94 x 2.24 x 2.54

0_40503TC

3.94

2.24

2.54

Y

4.22

1.95

2.87

4.83 x 2.29 x 1.27 

0_40401TC

4.83

2.29

1.27

Y

5.11

2

1.53

4.83 x 2.29 x 2.54

0_40402TC

4.83

2.29

2.54

Y

5.11

2

2.87

5.84 x 3.05 x 1.52

0_40601TC

5.84

3.05

1.52

Y

6.2

2.69

1.78

5.84 x 3.05 x 3.18

0_40603TC

5.84

3.05

3.18

Y

6.2

2.69

3.51

7.62 x 3.18 x 4.78

0_40705TC

7.62

3.18

4.78

Y

7.95

2.84

4.98

9.53 x 5.59 x 7.11

0_40907TC

9.53

5.59

7.11

Z

10.17

4.95

7.66

9.53 x 4.75 x 3.18

0_41003TC

9.53

4.75

3.18

Z

10.17

4.2

3.73

9.53 x 4.75 x 4.78

0_41005TC

9.53

4.75

4.78

Z

10.17

4.2

5.33

12.7 x 5.16 x 6.35

0_41206TC

12.7

5.16

6.35

Z

13.34

4.52

6.91

12.7 x 8.14 x 3.18

0_41303TC

12.7

8.14

3.18

Z

13.34

7.29

3.69

12.7 x 8.14 x 3.89

0_41304TC

12.7

8.14

3.89

Z

13.34

7.29

4.47

12.7 x 8.14 x 5.08

0_41305TC

12.7

8.14

5.08

Z

13.34

7.29

5.75

12.7 x 8.14 x 6.35

0_41306TC

12.7

8.14

6.35

Z

13.34

7.29

6.91

Refer to page 62 for additional hardware information.

W material and M material limit dimensions will vary, please refer to the specific part datasheet.

For limiting dimensions of other available coatings, please refer to the specific part datasheet.

Magnetics-2021-Ferrite-Catalog-html.html
background image

MAGNETICS

22

Toroids

12.7 mm – 25.34 mm

NOMINAL A

L

 (mH/1000T)

SIZE (mm)

ORDERING CODE Y

Z L ± 25% R ± 25% P ± 25% F ± 20% T ± 25% J ± 20% W ± 30%

M ± 30%

C ± 25%

12.7 x 7.14 x 5.08

0_41405TC

P

526

1,320

1,440

1,730

2,890

5,780

500 

12.7 x 7.14 x 6.35

0_41406TC

P

658

1,660

1,805

2,166

3,612

7,224

10,974

625 

12.7 x 7.14 x 4.78

0_41407TC

P

495

1,240

1,356

1,630

2,715

5,430

 470

12.7 x 7.14 x 7.62

0_41410TC

P

790

1,990

2,162

2,595

4,335

8,675

 790

13.2 x 7.37 x 3.96

0_41506TC

P

415

1,020

1,111

1,334

1,320

2,295

4,590

315

13.6 x 7.01 x 3.51

0_41435TC

P

419

1,040

1,130

1,350

2,260

4,520

418

14.0 x 8.99 x 5.0

0_41450TC

P

399

990

1,080

1,290

2,160

4,320

397

15.9 x 9.07 x 4.7

0_41605TC

P

475

1,260

1,375

1,650

1,580

2,760

5,520

7,917

475

15.9 x 9.07 x 5.7

0_41606TC

P

1,920

15.9 x 9.07 x 6.84

0_41607TC

P

2,300

15.9 x 9.07 x 9.4

0_41610TC

P

950

2,450

2,660

3,200

5,410

10,600

950

18.4 x 9.75 x 10.3

0_41809TC

P

1,177

2,810

3,050

3,660

6,115

12,200

1,177

20.6 x 12.7 x 6.35

0_42106TC

P

553

1,380

1,500

1,680

2,800

5,600

553

20.6 x 12.7 x 8.89

0_42109TC

P

774

1,930

2,100

2,520

4,200

8,400

774

22.1 x 13.7 x 6.35

0_42206TC

P

547

1,380

1,510

1,812

1,790

3,020

6,040

8,494

538

22.1 x 13.7 x 7.9

0_42207TC

P

680

1,720

1,875

2,250

3,700

7,400

671

22.1 x 13.7 x 12.7

0_42212TC

P

1,093

2,770

3,020

3,624

6,040

12,080

17,313

1,084

25.34 x 12.7 x 9.53

0_42506TC

P

3,627

25.34 x 15.45 x 7.66

0_42507TC

P

705

1,800

1,958

2,348

3,913

7,825

11,072

690

25.34 x 15.45 x 10.0

0_42508TC

P

891

2,220

2,420

2,900

4,830

9,660

HOW TO ORDER

O J 4 14 06 TC

Coating code 
Ferrite core material
Used for all ferrite types
Approximate diameter in mm
Approximate height in mm
Geometry code

Coating 

Code

Coating 

Material

Temperature 

Rating

Voltage Breakdown 

(wire to wire)

0

Bare Core

N/A

N/A

Y

Parylene

130°C

600V

Z

Epoxy

200°C

1000V

Magnetics-2021-Ferrite-Catalog-html.html
background image

23

MAGNETIC DATA

HARDWARE

SIZE (mm)

ORDERING CODE

I

(mm)

A

(mm

2

) V

(mm

3

) Window Area

 

(cm

2

) WaAc (cm

4

) Weight 

(grams/pc)

Headers & Mounts

12.7 x 7.14 x 5.08

0_41405TC

29.5

13.7

405

0.40

 0.05

2.03

12.7 x 7.14 x 6.35

0_41406TC

29.5

17.1

507

0.40

0.07

2.70

TVB22066A

12.7 x 7.14 x 4.78

0_41407TC

29.5

12.9

381

0.40

0.05

 1.90

TVB22066A

12.7 x 7.14 x 7.62

0_41410TC

29.5

20.6

608

0.40

0.17

3.04

13.2 x 7.37 x 3.96

0_41506TC

30.6

11.2

343

0.42

0.05

1.9

TVB22066A

13.6 x 7.01 x 3.51

0_41435TC

30.1

11.1

335

0.36

0.04

1.7

14.0 x 8.99 x 5.0

0_41450TC

35.0

12.3

430

0.63

0.08

2.2

TVB22066A

15.9 x 9.07 x 4.7

0_41605TC

37.2

15.6

580

0.62

0.10

2.8

TVB22066A

15.9 x 9.07 x 5.7

0_41606TC

37.2

19.0

706

0.62

0.13

4.1

TVB22066A

15.9 x 9.07 x 6.84

0_41607TC

37.2

22.8

847

0.64

0.15

4.5

TVB22066A

15.9 x 9.07 x 9.4

0_41610TC

37.2

31.2

1,164

0.62

0.20

5.8

18.4 x 9.75 x 10.3

0_41809TC

41.4

43.1

1,783

0.74

0.32

9.9

TVB22066A

20.6 x 12.7 x 6.35

0_42106TC

50.3

24.6

1,238

1.27

0.31

5.4

TVB22066A

20.6 x 12.7 x 8.89

0_42109TC

50.3

34.4

1,733

1.27

0.43

8.1

TVB22066A

22.1 x 13.7 x 6.35

0_42206TC

54.1

26.2

1,417

1.48

0.39

6.4

TVB22066A

22.1 x 13.7 x 7.9

0_42207TC

54.2

32.5

1,763

1.48

0.48

8.5

TVB22066A

22.1 x 13.7 x 12.7

0_42212TC

51.9

52.3

2,834

1.48

0.77

13.5

TVB22066A

25.34 x 12.7 x 9.53

0_42506TC

55.3

57.9

3,199

1.26

0.73

25.0

TVH25074A

25.34 x 15.45 x 7.66

0_42507TC

61.5

37.1

2,284

1.89

0.69

11.6

TVH25074A

25.34 x 15.45 x 10.0

0_42508TC

61.5

48.0

2,981

1.89

0.89

14.9

TVH25074A

Refer to page 62 for additional hardware information. 

BARE NOMINAL DIMENSIONS (mm)              

Z-COATED LIMITING DIMENSIONS (mm)

SIZE (mm)

ORDERING CODE

OD (A)

ID (B)

HT (C)

OD max

ID min

HT max

12.7 x 7.14 x 5.08

0_41405TC

12.7

7.14

5.08

13.34

6.5

5.75

12.7 x 7.14 x 6.35

0_41406TC

12.7

7.14

6.35

13.34

6.5

6.91

12.7 x 7.14 x 4.78

0_41407TC

12.7

7.14

4.78

13.34

6.5

5.29

12.7 x 7.14 x 7.62

0_41410TC

12.7

7.14

7.62

13.34

6.5

8.26

13.2 x 7.37 x 3.96

0_41506TC

13.2

7.37

3.96

13.84

6.73

4.47

13.6 x 7.01 x 3.51

0_41435TC

13.6

7.01

3.51

14.23

6.37

4.02

14.0 x 8.99 x 5.0

0_41450TC

14.0

8.99

5.0

14.64

8.35

5.52

15.9 x 9.07 x 4.7

0_41605TC

15.9

9.07

4.7

16.64

8.12

5.21

15.9 x 9.07 x 5.7

0_41606TC

15.9

9.07

5.7

16.59

7.92

6.4

15.9 x 9.07 x 6.84

0_41607TC

15.9

9.07

6.84

16.64

8.12

7.51

15.9 x 9.07 x 9.4

0_41610TC

15.9

9.07

9.4

16.64

8.12

10.03

18.4 x 9.75 x 10.3

0_41809TC

18.4

9.75

10.3

19.21

8.99

10.9

20.6 x 12.7 x 6.35

0_42106TC

20.6

12.7

6.35

21.34

11.93

6.91

20.6 x 12.7 x 8.89

0_42109TC

20.6

12.7

8.89

21.34

11.93

9.53

22.1 x 13.7 x 6.35

0_42206TC

22.1

13.7

6.35

22.86

12.95

6.91

22.1 x 13.7 x 7.9

0_42207TC

22.1

13.7

7.9

22.86

12.95

8.56

22.1 x 13.7 x 12.7

0_42212TC

22.1

13.7

12.7

22.86

12.95

13.34

25.34 x 12.7 x 9.53

0_42506TC

25.34

12.7

9.53

26.29

12.83

10.16

25.34 x 15.45 x 7.66

0_42507TC

25.34

15.45

7.66

26.29

14.6

8.56

25.34 x 15.45 x 10.0

0_42508TC

25.34

15.45

10.0

26.29

14.6

10.65

W material and M material limit dimensions will vary, please refer to the specific part datasheet.

For limiting dimensions of other available coatings, please refer to the specific part datasheet.

Magnetics-2021-Ferrite-Catalog-html.html
background image

MAGNETICS

24

Toroids

26.9 mm – 46.9 mm

 

NOMINAL A

L

 (mH/1000T)

SIZE (mm)

ORDERING CODE

Y

Z

R ± 25%

P ± 25%

F ± 20%

T ± 25%

J ± 20%

W ± 30%

26.9 x 14.2 x 12.2

0_42712TC

P

3,610

3,920

4,710

7,650

15,300

29 x 19 x 7.43

0_42908TC

P

1,450

1,585

1,902

3,170

6,340

29 x 19 x 15.2

0_42915TC

P

2,960

3,222

3,868

6,447

12,894

30.8 x 19.1 x 12.7

0_43113TC

P

2,850

3,100

3,720

6,200

12,400

32 x 15 x 4.5

0_43205TC

P

1,480

1,610

1,930

3,220

6,440

36 x 23 x 10

0_43610TC

P

2,030

2,210

2,726

4,543

9,085

36 x 23 x 15

0_43615TC

P

3,100

3,366

4,040

6,736

13,400

36 x 23 x 20

0_43620TC

P

9,086

 

38.1 x 19 x 6.35

0_43806TC

P

2,020

2,200

2,640

4,400

8,800

38.1 x 19 x 12.7

0_43813TC

P

3,850

4,185

5,020

5,190

8,365

16,700

38.1 x 19 x 25.4

0_43825TC

P

8,060

8,762

10,040

16,730

33,400

41.8 x 26.2 x 18

0_44015TC

P

3,860

4,200

5,040

5,040

8,408

16,816

44.3 x 19 x 15.9

0_44416TC

P

5,360

5,830

7,000

11,600

23,200

44.3 x 19 x 19.1

0_44419TC

P

7,970

9,550

46.9 x 27 x 15

0_44715TC

P

3,700

4,030

4,840

8,075

16,100

HOW TO ORDER

O J 4 14 06 TC

Coating code 
Ferrite core material
Used for all ferrite types
Approximate diameter in mm
Approximate height in mm
Geometry code

Coating 

Code

Coating 

Material

Temperature 

Rating

Voltage Breakdown 

(wire to wire)

0

Bare Core

N/A

N/A

Y

Parylene

130°C

600V

Z

Epoxy

200°C

1000V

Magnetics-2021-Ferrite-Catalog-html.html
background image

www.mag-inc.com

25

MAGNETIC DATA

HARDWARE

SIZE (mm)

ORDERING CODE

I

(mm)

A

(mm

2

)

V

(mm

3

)

Window 

Area

 

(cm

2

)

WaAc 

(cm

4

)

Weight 

(grams per piece)

Headers & Mounts

26.9 x 14.2 x 12.2

0_42712TC

60.2

73.2

4,410

1.57

1.16

22.5

29 x 19 x 7.43

0_42908TC

73.2

37.0

2,679

2.84

1.05

12.9

TVH25074A

29 x 19 x 15.2

0_42915TC

73.2

74.9

5,481

2.84

2.13

27.6

TVH25074A

30.8 x 19.1 x 12.7

0_43113TC

75.4

73.6

5,547

2.83

2.11

29.3

TVB2908TA

32 x 15 x 4.5

0_43205TC

67.2

36.4

2,451

0.34

0.61

12.9

TVH38134A

36 x 23 x 10

0_43610TC

89.7

63.9

5,731

4.15

2.65

29.4

TVH38134A

36 x 23 x 15

0_43615TC

89.6

95.9

8,596

2.85

3.98

44

TVH38134A

36 x 23 x 20

0_43620TC

89.6

128

11,461

4.15

5.31

 54

38.1 x 19 x 6.35

0_43806TC

82.9

58.3

4,826

2.85

1.66

26.4

TVH38134A

38.1 x 19 x 12.7

0_43813TC

82.9

115.6

9,652

2.85

3.28

51.7

TVH38134A

38.1 x 19 x 25.4

0_43825TC

82.8

233

19,304

2.85

6.56

103.4

TVH38134A

41.8 x 26.2 x 18

0_44015TC

103

138

14,205

5.39

7.44

68.9

TVH49164A

44.3 x 19 x 15.9

0_44416TC

88.0

187

16,559

2.85

5.33

80.8

TVH49164A

44.3 x 19 x 19.1

0_44419TC

88.0

228

20,146

2.85

6.50

107.9

46.9 x 27 x 15

0_44715TC

110.4

145.5

16,063

5.72

8.34

 84.0

TVH49164A

Refer to page 62 for additional hardware information.

BARE NOMINAL DIMENSIONS (mm)              

Z-COATED LIMITING DIMENSIONS (mm)

SIZE (mm)

ORDERING CODE

OD (A)

ID (B)

HT (C)

OD max

ID min

HT max

26.9 x 14.2 x 12.2

0_42712TC

26.9

14.2

12.2

28.01

13.01

13

29 x 19 x 7.43

0_42908TC

29.0

19.0

7.43

29.9

18.11

8.06

29 x 19 x 15.2

0_42915TC

29.0

19.0

15.2

30.15

17.85

16.21

30.8 x 19.1 x 12.7

0_43113TC

30.8

19.1

12.7

31.88

18.11

13.64

32 x 15 x 4.5

0_43205TC

32.0

15.0

4.5

32.9

14.12

5.01

36 x 23 x 10

0_43610TC

36.0

23.0

10.0

37.15

22.05

10.65

36 x 23 x 15

0_43615TC

36.0

23.0

15.0

37.15

22.05

15.6

36 x 23 x 20

0_43620TC

36.0

23.0

20.0

37.15

22.05

20.65

38.1 x 19 x 6.35

0_43806TC

38.1

19.0

6.35

39.25

17.9

6.91

38.1 x 19 x 12.7

0_43813TC

38.1

19.0

12.7

39.25

17.9

13.34

38.1 x 19 x 25.4

0_43825TC

38.1

19.0

25.4

39.25

17.9

26.29

41.8 x 26.2 x 18

0_44015TC

41.8

26.2

18.0

43.15

25.15

19.2

44.3 x 19 x 15.9

0_44416TC

44.3

19.0

15.7

45.6

17.9

16.64

44.3 x 19 x 19.1

0_44419TC

44.3

19.0

19.1

45.6

17.9

20.14

46.9 x 27 x 15

0_44715TC

46.9

27.0

15.0

48.04

25.85

15.65

W-perm limiting dimensions will vary, please refer to the specific part datasheet.

For limiting dimensions of other available coatings, please refer to the specific part datasheet.

Magnetics-2021-Ferrite-Catalog-html.html
background image

MAGNETICS

26

Toroids

49.1 mm – 140 mm 

NOMINAL A

L

 (mH/1000T)

SIZE (mm)

ORDERING CODE

Y

Z

R ± 25%

P ± 25%

F ± 20%

T ± 25%

J ± 20%

W ± 30%

49.1 x 33.8 x 15.9

0_44916TC

P

2,710

2,950

3,540

5,900

11,800

49.1 x 31.8 x 15.9

0_44920TC

P

2,790

3,032

3,640

6,065

12,130

49.1 x 31.8 x 19.05

0_44925TC

P

3,420

3,718

4,460

7,435

14,870

49.1 x 33.8 x 31.3

0_44932TC

P

5,430

5,900

7,080

11,800

23,600

60.96 x 41.78 x 12.7

0_46013TC

P

1,960

4,800

9,483

60.96 x 41.78 x 19.05

0_46019TC

P

7,100

 

61 x 35.6 x 12.7

0_46113TC

P

3,140

3,491

4,107

6,845

13,690

63 x 38 x 24.5

0_46325TC

P

21,056

63 x 38 x 24.5

0_46326TC

P

5,770

6,270

7,530

12,500

 

73.7 x 38.9 x 12.5

0_47313TC

P

3,700

4,024

4,880

5,790

8,140

16,280

73.7 x 38.9 x 25.2

0_47325TC

P

7,400

8,050

9,760

16,280

 

73.7 x 38.9 x 25.4

0_47326TC

P

27,610

85.7 x 55.5 x 12.7

0_48613TC

P

2,510

2,726

3,310

5,520

11,040

85.7 x 55.5 x 19.05

0_48619TC

P

14,900

85.7 x 55.5 x 25.4

0_48625TC

P

5,040

5,480

6,570

10,960

 

85.7 x 55.5 x 25.4

0_48626TC

P

18,760

102 x 65.8 x 15

0_49715TC

P

3,025

3,464

3,945

6,575

11,178

107 x 65 x 18

0_49718TC

P

4,127

4,486

5,383

8,972

15,252

107 x 65 x 25

0_49725TC

P

5,732

6,230

7,477

12,461

21,184

140 x 106 x 25

0_49740TC

P

3,200

3,477

4,173

6,955

11,823

HOW TO ORDER

O J 4 14 06 TC

Coating code 
Ferrite core material
Used for all ferrite types
Approximate diameter in mm
Approximate height in mm
Geometry code

Coating 

Code

Coating 

Material

Temperature 

Rating

Voltage Breakdown 

(wire to wire)

0

Bare Core

N/A

N/A

Y

Parylene

130°C

600V

Z

Epoxy

200°C

1000V

Magnetics-2021-Ferrite-Catalog-html.html
background image

27

MAGNETIC DATA

HARDWARE

SIZE (mm)

ORDERING CODE

I

(mm) A

(mm

2

) V

(mm

3

) Window Area

 

(cm

2

) WaAc (cm

4

) Weight 

(grams/pc)

Headers & Mounts

49.1 x 33.8 x 15.9

0_44916TC

127

120

15,298

8.99

10.6

75.3

TVH49164A

49.1 x 31.8 x 15.9

0_44920TC

123.2

135.4

16,676

7.94

9.45

83

TVH49164A

49.1 x 31.8 x 19.05

0_44925TC

123

162

20,000

7.94

12.8

98

TVH49164A

49.1 x 33.8 x 31.3

0_44932TC

127

237

30,100

8.99

21.2

150.6

TVH49164A

60.96 x 41.78 x 12.7

0_46013TC

157.6

120.4

18,968

13.68

16.48

 94

60.96 x 41.78 x 19.05

0_46019TC

157.6

180.5

28,453

13.68

24.7

 141

61 x 35.6 x 12.7

0_46113TC

144.6

157.4

22,774

9.93

15.5

113

TVH49164A

63 x 38 x 24.5

0_46325TC

152

300

45,598

11.1

33.2

225

TVH49164A

63 x 38 x 24.5

0_46326TC

152

300

45,600

11.3

33.9

225

TVH49164A

73.7 x 38.9 x 12.5

0_47313TC

165

210

34,771

11.9

25

172

73.7 x 38.9 x 25.2

0_47325TC

165

423

70,099

11.9

50.3

 347

73.7 x 38.9 x 25.4

0_47326TC

165

427

70,595

11.9

50.8

 350

85.7 x 55.5 x 12.7

0_48613TC

214.9

188.8

40,582

24.2

45.7

201

85.7 x 55.5 x 19.05

0_48619TC

215

283

60,874

24.2

68.4

302

85.7 x 55.5 x 25.4

0_48625TC

215

375

80,700

24.2

90.8

 399

85.7 x 55.5 x 25.4

0_48626TC

215

377

81,165

24.2

91.2

 402

102 x 65.8 x 15

0_49715TC

255.3

267.2

68,821

34

90.8

341

107 x 65 x 18

0_49718TC

259.31

370.27

96,013

28.6

106

475

107 x 65 x 25

0_49725TC

259.31

514.3

133,351

33.2

171

660

140 x 106 x 25

0_49740TC

381.5

422.3

161,086

88.2

372

797

Refer to page 62 for additional hardware information.

BARE NOMINAL DIMENSIONS (mm)              

Z-COATED LIMITING DIMENSIONS (mm)

SIZE (mm)

ORDERING CODE

OD (A)

ID (B)

HT (C)

OD max

ID min

Ht. max

49.1 x 33.8 x 15.9

0_44916TC

49.1

33.8

15.9

50.22

32.69

16.64

49.1 x 31.8 x 15.9

0_44920TC

49.1

31.8

15.9

50.22

30.65

16.64

49.1 x 31.8 x 19.05

0_44925TC

49.1

31.8

19.05

50.22

30.65

19.82

49.1 x 33.8 x 31.3

0_44932TC

49.1

33.8

31.3

50.22

32.69

32.64

60.96 x 41.78 x 12.7

0_46013TC

60.96

41.78

12.7

62.23

40.51

13.34

60.96 x 41.78 x 19.05

0_46019TC

60.96

41.78

19.05

62.23

40.51

19.95

61 x 35.6 x 12.7

0_46113TC

61

35.6

12.7

62.23

34.29

13.34

63 x 38 x 24.5

0_46325TC

63

38

24.5

64.9

35.97

25.96

63 x 38 x 24.5

0_46326TC

63

38

24.5

64.9

36.4

25.8

73.7 x 38.9 x 12.5

0_47313TC

73.7

38.9

12.5

75.06

37.46

13.34

73.7 x 38.9 x 25.2

0_47325TC

73.7

38.9

25.2

75.06

37.46

26.29

73.7 x 38.9 x 25.4

0_47326TC

73.7

38.9

25.4

75.56

36.96

26.92

85.7 x 55.5 x 12.7

0_48613TC

85.7

55.5

12.7

87.38

53.89

13.34

85.7 x 55.5 x 19.05

0_48619TC

85.7

55.5

19.05

88.02

53.26

20.97

85.7 x 55.5 x 25.4

0_48625TC

85.7

55.5

25.4

87.38

53.89

26.65

85.7 x 55.5 x 25.4

0_48626TC

85.7

55.5

25.4

88.02

53.26

26.92

102 x 65.8 x 15

0_49715TC

102

65.8

15

104.5

64.1

16

107 x 65 x 18

0_49718TC

107

65

18

109.5

63.3

18.85

107 x 65 x 25

0_49725TC

107

65

25

109.5

63.3

26.05

140 x 106 x 25

0_49740TC

140

106

25

143.5

103.6

26.4

W-perm limiting dimensions will vary, please refer to the specific part datasheet. For limiting dimensions of other available coatings, please refer to the specific part datasheet.

Magnetics-2021-Ferrite-Catalog-html.html
background image

MAGNETICS

28

NOMINAL A

L

 (mH/1000T)

TYPE/SIZE

ORDERING CODE

L

R

P

F

T

J

W

E 9/4/2

0_40904EC

280

493

540

650

1,040

E 13/7/3

0_41203EC

350

587

640

770

1,367

E 13/7/6

0_41205EC

700

1,467

1,600

1,950

3,300

E 17/7/4

0_41707EC

520

1,013

1,100

1,300

1,900

E 19/8/5

0_41808EC

550

1,153

1,253

1,500

1,500

2,500

4,293

E 19/8/10

0_41810EC

1,000

2,300

2,500

3,000

5,000

8,600

E 25/10/7

0_42510EC

800

1,767

1,920

2,300

3,700

7,660

E 25/13/7

0_42513EC

900

1,900

2,314

2,460

4,000

E 25/16/6

0_42515EC

540

1,153

1,253

1,500

2,400

E 25/10/13

0_42520EC

1,600

3,533

3,840

4,600

7,400

13,813

E 25/13/11

0_42526EC

2,800

3,512

4,068

4,068

5,951

E 25/16/13

0_42530EC

1,070

2,307

2,507

3,000

4,800

8,213

E 31/15/7

0_43007EC

920

2,060

2,240

2,700

3,800

8,200

E 31/13/9

0_43009EC

1,400

2,893

3,147

3,780

5,893

E 34/14/9

0_43515EC

2,667

2,907

3,500

5,813

11,414

E 35/21/9

0_43520EC

1,947

2,120

2,555

4,240

E, I Cores

9 mm – 35 mm 

E cores are less expensive than pot cores and have the advantage of simple bobbin winding plus 
easy assembly. E cores do not, however, offer self-shielding. Lamination size E cores are available  
to fit commercially offered bobbins previously designed to fit the strip stampings of standard 
lamination sizes. Metric and DIN sizes are also available. E cores can be pressed to different 
thicknesses, providing a selection of cross-sectional areas. E cores can be mounted in different 
directions and, if desired, provide a low profile. 

Typical applications for E cores include differential mode, power and telecom inductors, as well as 
broadband, power, converter and inverter transformers.

HOW TO ORDER

GEOMETRY CODE

EC

 – 

E core 

IC

 – 

I core

Cores are sold per piece (for sets multiply by 2).  

See page 18 for information on gapped cores.
For an E-core gapped to an A

L

 value when mated with the standard 

I-core, add “-EI” to the end of the part number.

O R 4 30 07 EC

Shape code 
Ferrite core material
Used for all ferrite types
Approximate length in mm
Approximate height in mm
Geometry code

Magnetics-2021-Ferrite-Catalog-html.html
background image

www.mag-inc.com

29

DIMENSIONS (mm)

TYPE/SIZE

ORDERING CODE

A

B

C

D

E

F

L

M

E 9/4/2

0_40904EC

9.0 ± 0.4

4.06 ± 0.25

1.91 ± 0.13

2.03 min 

 4.85 min

1.91 ± .013

1.91 ± 0.25

1.57 ± 0.25

E 13/7/3

0_41203EC

 12.7 ± 0.25

5.69  ± 0.18 

 3.18 ± 0.13 

  3.96  min

9.19  min

3.18 ± 0.08 

 1.57  nom

 3.05  min 

E 13/7/6

0_41205EC

 12.7 ± 0.25

5.69 ± 0.18 

 6.4 ± 0.15 

  3.96  min

9.2  min

3.2 ± 0.13 

 1.57  ref

 3.05  min 

E 17/7/4

0_41707EC

 16.8 ± 38 

7.11 ± 0.18 

 3.56  ± 0.12 

  3.94  min 

10.4  min 

3.56 ± 0.13 

 2.79  nom 

 3.63  min 

E 19/8/5

0_41808EC

 19.1 ± .4 

 8.1 ±  0.13 

 4.75 ± 0.2 

5.7 ± 0.13 

14.33 ± 0.33

 4.75 ± 0.2 

2.38  nom

4.79  nom 

E 19/8/10

0_41810EC

19.1 ± .4

 8.1 ± 0.18

9.53 ± 0.13

  5.7  min 

 14.0 min 

4.75 ± 0.2 

 2.38  ref

 4.79  ref 

E 25/10/7

0_42510EC

 25.4 ± .6 

 9.65 ± 0.2 

 6.35 ± 0.25

  6.4 min

18.8  min

6.35 ± 0.25 

 3.3 nom

  6.1 min 

E 25/13/7

0_42513EC

25.0 + 0.8/-0.7  12.8 + 0/-0.4  7.5 + 0/-0.6 

8.7 + 0.6/-0

17.5 + 0.9/-0

7.5 + 0/-0.5 

3.55 ref

5.35 ref

E 25/16/6

0_42515EC

25.4 ± 0.38

15.9 ± 0.25

6.35 ± 0.25

12.6  min

18.8  min

6.35 ±  0.13

3.12 ± 0.13

6.4 ± 0.25

E 25/10/13

0_42520EC

25.4 ± 0.6

9.65  ± 0.2

12.7 ± 0.25

6.4  min

18.8  min

6.35 ± 0.25

3.6  max

6.1  min 

E 25/13/11

0_42526EC

25.0 + 0.8/-0.7 12.8 + 0/-0.5

11 + 0/-0.5

8.7 + 0.5/-0

17.5 + 1/-0

7.5 + 0/-0.5

3.53 ref

5.37 ref 

E 25/16/13

0_42530EC

25.4 ± 0.38

15.9 ± 0.25

12.7 ± 0.25

12.6 min

18.8 min

6.35 ± 0.13

3.12 ± 0.13

6.4 ± 0.25

E 31/15/7

0_43007EC

30.8 + 0/-1.4

15.0 ± 0.2

7.3 ± 0/-0.5

9.71 + 0.5/-0

19.5 + 1/-0

7.2 + 0/-0.5

5.65 nom

6.15 nom 

E 31/13/9

0_43009EC

 

     

30.95 ± 0.5

13.1 ± 0.25

9.4 ± 0.3

8.5  min

21.4 min

9.4 ± 0.13

4.29  nom

6.0 min

E 34/14/9

0_43515EC

34.3 ± 0.6

14.1  ± 0.15

9.3 ± 0.25

9.8 ± 0.13

25.5  min

9.3 ± 0.2

4.7  max

8.0 min

E 35/21/9

0_43520EC

34.9 ± 0.38

20.6 ± 0.25

9.53 ± 0.18

15.6 min

25.1 min

9.53 ± 0.25

4.75 ± 0.25

7.95 nom

MAGNETIC DATA

HARDWARE

TYPE/SIZE

ORDERING CODE

I

(mm)

A

(mm

2

)

A

e

 min 

(mm

2

)

V

(mm

3

)

WaAc  

(cm

4

)

Weight 

(grams per set)

Bobbins

E 9/4/2

0_40904EC

15.6

5.0

3.6

78

0.002

0.7

E 13/7/3

0_41203EC

27.8

10.1

10.1

279

0.016

1.3

E 13/7/6

0_41205EC

27.7

20.2

20.0

558

0.03

2.6

E 17/7/4

0_41707EC

30.4

16.6

12.6

505

0.03

3.0

E 19/8/5

0_41808EC

39.9

22.6

22.1

900

0.08

4.4

PCB1808B1

E 19/8/10

0_41810EC

40.1

45.5

45.4

1,820

0.14

8.5

E 25/10/7

0_42510EC

49.0

39.5

37.0

1,930

0.16

9.5

00B251001

E 25/13/7

0_42513EC

57.8

51.8

51.8

2,990

0.27

16

E 25/16/6

0_42515EC

73.5

40.1

39.7

2,950

0.56

15

00B251501

E 25/10/13

0_42520EC

48.0

78.4

76.8

3,760

0.48

19

PCB2520TA

E 25/13/11

0_42526EC

57.5

78.4

76.8

4,500

0.41

36

E 25/16/13

0_42530EC

73.5

80.2

79.4

5,900

0.74

30

E 31/15/7

0_43007EC

67.0

60.0

49.0

4,000

0.50

20

E 31/13/9

0_43009EC

61.9

83.2

83.2

5,150

0.59

26

PCB3009LA

E 34/14/9

0_43515EC

69.3

80.7

80.7

5,590

0.98

28

PCB3515M1

E 35/21/9

0_43520EC

94.3

90.6

90.5

8,540

1.68

42

Refer to page 62 for additional hardware information.

Magnetics-2021-Ferrite-Catalog-html.html
background image

MAGNETICS

30

E, I Cores

40 mm – 100 mm 

NOMINAL A

L

 (mH/1000T)

TYPE/SIZE

ORDERING CODE

R

P

F

T

J

W

E 40/17/11

0_44011EC

4,000

4,347

5,200

7,293

E 42/21/9

0_44016EC

2,667

2,907

3,495

5,647

E 43/21/15

0_44020EC

4,600

5,000

6,000

5,300

9,700

I 43/6/15

0_44020IC

6,253

6,800

E 43/21/20

0_44022EC

5,533

6,013

7,600

6,950

10,613

E 42/33/20

0_44033EC

4,000

4,709

5,562

8,727

E 41/17/12

0_44317EC

3,900

4,240

5,900

9,800

18,293

E 47/20/16

0_44721EC

5,360

5,827

8,300

E 56/28/21

0_45528EC

6,293

6,840

8,220

8,625

E 56/28/25

0_45530EC

7,520

8,173

9,800

9,860

14,920

E 56/24/19

0_45724EC

8,093

8,800

10,400

10,440

14,580

24,000

E 60/22/16

0_46016EC

5,733

6,240

6,590

E 60/31/22

0_46022EC

7,500

E 65/32/27

0_46527EC

8,600

9,200

10,600

E 70/33/32

0_47133EC

10,800

11,600

13,400

13,330

E 72/28/19

0_47228EC

5,960

6,480

7,780

7,780

11,850

E 80/38/20

0_48020EC

4,673

5,080

6,000

6,730

E 100/59/27

0_49928EC

6,227

6,773

9,010

HOW TO ORDER

GEOMETRY CODE

EC

 – 

E core 

IC

 – 

I core

Cores are sold per piece (for sets multiply by 2).

See page 18 for information on gapped cores.
For an E-core gapped to an A

L

 value when mated with the standard 

I-core, add “-EI” to the end of the part number.

O R 4 72 28 EC

Shape code 
Ferrite core material
Used for all ferrite types
Approximate length in mm
Approximate height in mm
Geometry code

Magnetics-2021-Ferrite-Catalog-html.html
background image

www.mag-inc.com

31

Refer to page 44 for hardware information.

MAGNETIC DATA

HARDWARE

TYPE/SIZE

ORDERING CODE

I

(mm)

A

(mm

2

)

A

e

 min 

(mm

2

)

V

(mm

3

)

WaAc  

(cm

4

)

Weight 

(grams per set)

Bobbins

E 40/17/11

0_44011EC

76.7

127

114

9,780

1.26

49

E 42/21/9

0_44016EC

98.4

107

106

10,500

1.65

52

E 43/21/15

0_44020EC

97.0

178

175

17,300

3.55

87

PCB4020N1

I 43/6/15

0_44020IC

67.1

177

176

11,900

1.36

60

PCB4020N1

E 43/21/20

0_44022EC

97.0

233

233

22,700

4.22

114

PCB4022N1

E 42/33/20

0_44033EC

145

236

234

34,200

6.36

164

E 41/17/12

0_44317EC

77.0

149

142

11,500

1.88

57

PCB4317M1

E 47/20/16

0_44721EC

88.9

234

226

20,800

3.3

103

PCB4721M1

E 56/28/21

0_45528EC

124

353

345

44,000

9.78

212

PCB5528WC

E 56/28/25

0_45530EC

123

420

411

52,000

12.1

255

PCB5530FA

E 56/24/19

0_45724EC

107

337

337

36,000

6.98

179

PCB5724M1

E 60/22/16

0_46016EC

110

248

240

27,200

5.74

135

E 60/31/22

0_46022EC

139

402

401

55,900

21.0

200

E 65/32/27

0_46527EC

147

540

530

79,000

23.5

410

00B652701

E 70/33/32

0_47133EC

149

683

676

102,000

23.3

495

E 72/28/19

0_47228EC

137

368

363

50,300

15.0

250

00B722801

E 80/38/20

0_48020EC

184

392

392

72,300

31.6

357

00B8020B1

E 100/59/27

0_49928EC

274

738

692

202,000

90.6

980

DIMENSIONS (mm)

TYPE/SIZE

ORDERING CODE

A

B

C

D

E

F

L

M

E 40/17/11

0_44011EC

40.0 ± 0.51 

17.0 ± 0.31  10.69 ± 0.31 

10.0 min

27.6  min

10.7 ± 0.31 

5.99 ± 0.25

8.86  nom

E 42/21/9

0_44016EC

42.15 ± 0.85

21.1 ± 0.2

9.0 ± 0.25

14.9 min

29.5 min

11.95 ± 0.25

5.94 ± 0.13

8.9 ± 0.25

E 43/21/15

0_44020EC

43.0 + 0/-1.7  21.0 ± 0.2

15.2 + 0/-0.6  14.8 + 0.6/-0 29.5 + 1.4/-0  12.2 + 0/-0.5 

6.75 nom

8.65  nom

I 43/6/15

0_44020IC

43.0 + 0/-1.7 

5.9 ± 0.2

15.2 + 0/-0.6

E 43/21/20

0_44022EC

43.0 + 0/-1.7  21.0 ± 0.2

20.0 + 0/-0.8  14.8 + 0.6/-0 29.5 + 1.4/-0  12.2 + 0/-0.5 

6.75 nom

8.65 nom 

E 42/33/20

0_44033EC

42.0 + 1/-0.7  32.8 + 0/-0.4 20.0 + 1/-0.8  26.0 + 1/-0 29.5 + 1.4/-0  12.2 + 0/-0.5 

5.98 ref

9.13 ref 

E 41/17/12

0_44317EC

40.6 ± 0.65 

16.6 ± 0.2 

12.4 ± 0.3 

10.4  min 

28.6  min 

12.45 ± 0.25 

6.33  max 

7.95  min

E 47/20/16

0_44721EC

46.9 ± 0.8 

19.6 ± 0.2 

15.6 ± 0.25 

12.1  min 

32.4 ± 0.65 

15.6 ± 0.25 

7.54  nom 

 7.87  min 

E 56/28/21

0_45528EC

56.2 + 0/-2.1  27.5 ± 0.3

21.0 + 0/-0.8  18.5 + 0.8/-0 37.5 + 1.5/-0  17.2 + 0/-0.5 

9.35 ref

10.15 ref 

E 56/28/25

0_45530EC

56.2 + 0/-2.1  27.6 ± 0.38

24.61 ± 0.38

18.5 min

37.5 min

17.2 + 0/-0.5 

9.35 ref

10.15 ref 

E 56/24/19

0_45724EC

56.1 ± 1 

23.6 ± 0.25 

18.8 ± 0.25 

14.6 ± 0.13 

38.1  min 

18.8 ± 0.25 

9.5  nom 

9.03  nom

E 60/22/16

0_46016EC

59.99 ± 0.78

22.3 ± 0.3

15.62 ± 0.38

13.8 min

44.0 min

15.62 ± 0.38

7.7 ± 0.25

14.49 ± 0.25

E 60/31/22

0_46022EC

60.3 ± 0.9

30.6 ± 0.3

22.3 ± 0.38

21.6 ± 0.3

42.3 ± 0.78

18.1 ± 0.25

9.0 ref

12.1 ref

E 65/32/27

0_46527EC

65.0 + 1.5/-1.2  32.8 + 0/-0.6  27.4 + 0/-0.8  22.0 + 0.8/-0  44.2 + 1.8/-0 20.0 + 0/-0.7

9.95 ref

12.72 ref 

E 70/33/32

0_47133EC

70.5 ± 1

33.2 + 0/-0.5  32.0 + 0/-0.8  21.9 + 0.7/-0  48.0 + 1.5/-0  22.0 + 0/-0.7

11.25 nom

13.0 nom 

E 72/28/19

0_47228EC

72.4 ± 0.76 

27.9 ± 0.33 

19.0 ± 0.33 

17.8  min

52.6  min

19.0 ± 0.38 

9.53 ± 0.38 

16.9  min

E 80/38/20

0_48020EC

80.0 ± 1.6 

38.1 ± 0.3 

19.8 ± 0.4 

28.2 ± 0.3 

59.1  min

19.8  ± 0.4 

11.25  nom

19.45  min

E 100/59/27

0_49928EC

100.3 ± 2.0

59.4 ± 0.47

27.5 ± 0.5

46.85 ± 0.38

72.0 min

27.5 ± 0.5

13.75 ± 0.38

22.65 ± 0.5

Refer to page 62 for additional hardware information.

Magnetics-2021-Ferrite-Catalog-html.html
background image

MAGNETICS

32

NOMINAL A

L

 (mH/1000T)

TYPE/SIZE

ORDERING CODE

L

R

P

F

T

14/2.5/5

0_41425EC

780

1,519

1,595

1,765

E 14 C

C_41434EC

600

1,327

1,399

1,563

I 14 C

C_41434IC

780

1,504

1,580

1,749

E 18 C

C_41805EC

1,500

3,244

3,430

3,853

I 18 C

C_41805IC

1,800

3,606

3,801

4,241

E 18

F_41805EC

1,550

3,244

3,430

3,853

I 18

F_41805IC

1,800

3,641

3,837

4,278

E 22/4/7

0_42107EC

1,350

2,920

3,173

3,810

I 22/4/7

0_42107IC

1,480

3,320

3,600

4,330

E 22/6/16

0_42214EC

4,600

I 22/2/6

0_42214IC

5,280

E 22 C

C_42216EC

2,300

5,066

5,387

6,131

I 22 C

C_42216IC

2,900

6,147

6,506

7,327

E 22

F_42216EC

2,400

5,066

5,387

6,131

I 22

F_42216IC

2,900

6,207

6,568

7,932

E 22

F_42217EC

4,400

E 32 C

C_43208EC

3,200

6,521

6,918

7,834

7,690

I 32 C

C_43208IC

3,700

7,321

7,745

8,711

8,520

E 32

F_43208EC

3,200

6,521

6,918

7,834

7,690

I 32 

F_43208IC

3,700

7,321

7,745

8,711

8,520

 E 36/6/18

0_43618EC

6,678

7,090

 I 36/6/18

0_43618IC

7,303

7,736

Planar E, I

Cores

14 mm – 36 mm 

Planar E cores are offered in all of the IEC standard sizes and a number of other sizes. The leg 
length and window height (B and D dimensions) are adjustable for specific applications without 
new tooling. This permits the designer to adjust the final core specification to exactly accommodate 
the planar conductor stack height with no wasted space. Clips and clip slots are available in many 
cases, which is useful for prototyping. I cores are also offered standard, reducing path length and 
increasing inductance. Planar cores provide the lowest profile design. E-I planar combinations allow 
practical face bonding in high volume assembly. The flat back can accommodate a heat sink.

Differential mode inductors, DC/DC, and AC/DC converters are typical applications for planar cores.

E CORE

I CORE

HOW TO ORDER

SHAPE CODE

 Planar core with clip recesses

F or 0 

– 

Planar core without clip recesses 

GEOMETRY CODE

EC

 – 

Planar E core   •   IC

 – 

Planar I core

For clip slot dimensions see individual datasheets. 

Cores are sold per piece (for sets multiply by 2). 

See page 18 for information on gapped cores.

For an E-core gapped to an A

L

 value when mated with the standard 

I-core, add “-EI” to the end of the part number.

C R 4 14 34 EC

Shape code 
Ferrite core material
Used for all ferrite types
Approximate length in mm
Approximate width in mm
Geometry code

Magnetics-2021-Ferrite-Catalog-html.html
background image

www.mag-inc.com

33

DIMENSIONS (mm)

TYPE/SIZE

ORDERING CODE

A

B

C

D

E

F

L

M

14/2.5/5

0_41425EC

14.0 ± 0.3

2.5 ± 0.1

5.0 ± 0.1

1.0 ± 0.1

11.0 ± 0.25

3.0 ± 0.1

1.5 ref

4.0 ref

E 14 C

C_41434EC

14.0 ± 0.3

3.5 ± 0.1

5.0 ±0.15

1.91 min

10.5 min

3.0 ± 0.1

1.5 ref

4.0 ref

I 14 C

C_41434IC

14.0 ± 0.3

1.8 ± 0.05

5.0 ± 0.15

1.5 ± 0.1

2.5 + 0.2/-0

E 18 C

C_41805EC

18.0 ± 0.35

4.0 ± 0.1

10.0 ± 0.2

2.0 ± 0.1

14 ± 0.3

4.0 ± 0.1

2.0 ref

5.0 ref

I 18 C

C_41805IC

18.0 ± 0.35

2.4 ± 0.5

10.0 ± 0.2

2.0 ± 0.1

2.5 + 0.2/-0

E 18

F_41805EC

18.0 ± 0.35

4.0 ± 0.1

10.0 ± 0.2

2.0 ± 0.1

13.7 min

4.0 ± 0.1

2.0 ref

5.0 ref

I 18

F_41805IC

18.0 ± 0.41

2.39 ± 0.1

10.0 ±0.2

E 22/4/7

0_42107EC

21.8 ± 0.4

3.91 ± 0.8

7.8 ± 0.5

1.73 ± 0.2

16.8 ± 0.3

5.0 ± 0.2

2.5 ± 0.12

5.89 ± 0.25

I 22/4/7

0_42107IC

21.8 ± 0.4

2.3 ± 0.2

7.8 ± 0.3

E 22/6/16

0_42214EC

21.8 ± 0.4

5.7 ± 0.1

15.8 ± 0.3

3.2 ± 0.1

16.8 +/- 0.4

5.0 ± 0.1

2.6 ref

5.9 ref

I 22/2/6

0_42214IC

21.8 ± 0.4

2.49 ± 0.13

15.8 ± 0.3

E 22 C

C_42216EC

21.8 ± 0.4

5.7 ± 0.1

15.8 ± 0.3

3.05 min

16.1 min

5.0 ± 0.1

2.5 ref

5.9 ref

I 22 C

C_42216IC

21.8 ± 0.4

2.9 ± 0.05

15.8 ± 0.3

2.5 ± 0.1

2.9 + 0.2/-0

E 22

F_42216EC

21.8 ± 0.4

5.72 ± 0.1

15.8 ± 0.3

3.05 min

16.1 min

5.0 ± 0.1

2.5 ref

5.9 ref

I 22

F_42216IC

21.8 ± 0.4

2.95 ± 0.1

15.8 ± 0.3

E 22

F_42217EC

21.6 ± 0.25

6.55 ± 0.08

15.9 ± 0.25

3.9 ± 0.1

16.3 ± 0.3

5.0 ± 0.15

2.65 ref

5.65 ref

E 32 C

C_43208EC

31.75 ± 0.64

6.35 ± 0.13

20.32 ± 0.41

3.18 ± 0.2

24.9 min

6.35 ± 0.13

3.18 ref

9.27 ref

I 32 C

C_43208IC

31.75 ± 0.64

3.18 ± 0.13

20.32 ± 0.41

E 32

F_43208EC

31.75 ± 0.64

6.35 ± 0.13

20.32 ± 0.41

3.18 ± 0.2

24.9 min

6.35 ± 0.13

3.18 ref

9.27 ref

I 32 

F_43208IC

31.75 ± 0.64

3.18 ± 0.13

20.32 ± 0.41

 E 36/6/18

0_43618EC

35.56 ± 0.5

6.35 ± 0.13

17.8 ± 0.4

2.41 min

27.2 min

7.62 ± 0.18

3.81 ± 0.13 10.16 ± 0.25

 I 36/6/18

0_43618IC

35.56 ± 0.5

3.68 ± 0.3

17.8 ± 0.4

MAGNETIC DATA

HARDWARE

TYPE/SIZE

ORDERING CODE

I

(mm)

A

(mm

2

)

A

e

 min (mm

2

)

V

(mm

3

)

WaAc (cm

4

) Weight 

(grams per set)

Clamps

14/2.5/5

0_41425EC

16.7

14.7

14.7

244

0.01

1.2

E 14 C

C_41434EC

20.7

14.7

14.7

304

0.02

1.5

I 14 C

C_41434IC

16.4

14.2

11.4

230

0.008

1.2

E 18 C

C_41805EC

24.2

40.1

39.9

972

0.07

4.8

00C180520

I 18 C

C_41805IC

20.3

39.5

35.9

830

0.03

4.1

00C180520

E 18

F_41805EC

24.2

40.1

39.9

972

0.07

4.8

I 18

F_41805IC

20.3

40.1

39.9

813

0.03

3.9

E 22/4/7

0_42107EC

25.7

37.1

36.0

960

0.06

4.2

I 22/4/7

0_42107IC

22.7

35.7

33.5

809

0.03

3.9

E 22/6/16

0_42214EC

32.5

78.3

77.9

2,540

0.29

6.1

I 22/2/6

0_42214IC

26.1

79.0

78.5

2,060

0.14

3.9

E 22 C

C_42216EC

32.3

76.0

73.1

2,451

0.27

12

00C221620

I 22 C

C_42216IC

26.1

80.4

72.5

2,100

0.14

10.4

00C221620

E 22

F_42216EC

32.5

78.5

76.0

2,550

0.27

12.5

I 22

F_42216IC

25.8

80.6

80.6

2,080

0.13

10.2

E 22

F_42217EC

35.1

82.1

79.0

2,880

0.36

14

E 32 C

C_43208EC

41.4

130

130

5,380

0.71

26

00C320802

I 32 C

C_43208IC

35.1

130

130

4,560

0.36

22

00C320802

E 32

F_43208EC

41.4

130

130

5,380

0.71

26

I 32 

F_43208IC

35.1

130

130

4,560

0.36

22

 E 36/6/18

0_43618EC

42.4

135

135

5,750

0.55

28

 I 36/6/18

0_43618IC

37.4

135

135

5,060

0.27

25

Refer to page 62 for additional hardware information.

Magnetics-2021-Ferrite-Catalog-html.html
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MAGNETICS

34

Planar E, I

Cores

38 mm – 102 mm 

NOMINAL A

L

 (mH/1000T)

TYPE/SIZE

ORDERING CODE

L

R

P

F

J

E 38

F_43808EC

3,880

7,618

8,354

9,490

I 38

F_43808IC

4,600

9,028

9,566

10,801

E 38

F_43809EC

7,300

E 40/8/10

0_44008EC

4,233

4,504

5,134

7,130

I 40/4/10

0_44008IC

4,744

5,035

5,706

8,026

E 43/8/28

0_44308EC

8,598

9,150

10,432

I 43/4/28

0_44308IC

9,541

10,130

11,849

E 43

F_44310EC

8,266

8,803

10,057

I 43

F_44310IC

9,541

10,130

11,489

E 58 C

C_45810EC

8,498

9,073

10,427

I 58 C

C_45810IC

9,821

10,457

11,941

E 58

F_45810EC

8,498

9,073

10,427

I 58

F_45810IC

9,821

10,457

11,941

E 64 C

C_46410EC

14,618

15,599

17,901

E 64

F_46410EC

14,618

15,599

17,901

I 64

F_46410IC

16,192

17,245

19,699

E 102

0_49938EC

9,292

9,997

11,697

HOW TO ORDER

SHAPE CODE

 Planar core with clip recesses

F or O 

– 

Planar core without clip recesses 

GEOMETRY CODE

EC

 – 

Planar E core 

IC

 – 

Planar I core

For clip slot dimensions see individual datasheets. 

Cores are sold per piece (for sets multiply by 2). 

See page 18 for information on gapped cores.

For an E-core gapped to an A

L

 value when mated with the standard 

I-core, add “-EI” to the end of the part number.

C R 4 64 10 EC

Shape code 
Ferrite core material
Used for all ferrite types
Approximate length in mm
Approximate width in mm
Geometry code

E CORE

I CORE

Magnetics-2021-Ferrite-Catalog-html.html
background image

www.mag-inc.com

35

MAGNETIC DATA

HARDWARE

TYPE/SIZE

ORDERING CODE

I

(mm)

A

(mm

2

)

A

e

 min (mm

2

)

V

e

(mm

3

)

WaAc (cm

4

) Weight 

(grams per set)

Clamps

E 38

F_43808EC

52.4

194

194

10,200

1.88

51

I 38

F_43808IC

43.7

194

194

8,460

0.94

42

E 38

F_43809EC

57.8

192

191

11,100

2.48

55

E 40/8/10

0_44008EC

51.9

101

95.1

5,220

0.77

26

I 40/4/10

0_44008IC

43.8

99.5

95.1

4,360

0.38

21

E 43/8/28

0_44308EC

57.5

227

227

13,100

2.52

64

I 43/4/28

0_44308IC

48.6

227

227

11,000

1.27

54

E 43

F_44310EC

61.1

229

229

13,900

3.18

71

I 43

F_44310IC

50.4

229

229

11,500

1.59

58

E 58 C

C_45810EC

80.6

308

308

24,600

8.16

119

00C581001

I 58 C

C_45810IC

67.7

310

310

20,800

4.09

101

00C581002

E 58

F_45810EC

80.6

308

308

24,600

8.16

119

I 58

F_45810IC

68.3

310

310

20,829

4.09

101

E 64 C

C_46410EC

80.2

516

516

41,400

11.10

195

00C641001

E 64

F_46410EC

80.2

516

516

41,400

11.10

200

I 64

F_46410IC

69.6

511

511

35,539

5.52

172

 

E 102

0_49938EC

148

540

525

79,800

50.5

400

Refer to page 62 for additional hardware information.

DIMENSIONS (mm)

TYPE/SIZE

ORDERING CODE

A

B

C

D

E

F

L

M

E 38

F_43808EC

38.1 ± 0.76

8.26 ± 0.13

25.4 ± 0.51

4.45 ± 0.13

30.23 min

7.62 ± 0.15

3.81

11.43

I 38

F_43808IC

38.1 ± 0.76

3.81 ± 0.13

25.4 ± 0.51

E 38

F_43809EC

38.1 ± 0.76

9.53 ± 0.13

25.4 ± 0.51

5.72 ± 0.13

30.23 min

7.62 ± 0.15

3.81

11.43

E 40/8/10

0_44008EC

40.65 ± 0.5

8.51 ± 0.25

10.7 ± 0.25

4.06 ± 0.25

30.45 ± 0.3

10.15 ± 0.15

5.1 ref 

10.15 ref

I 40/4/10

0_44008IC

40.64 ± 0.5

4.45 ± 0.25

10.7 ± 0.25

E 43/8/28

0_44308EC

43.2 ± 0.5

8.51 ± 0.25

27.9 ± 0.38

4.19 min

34.4 min

8.13 ± 0.13

4.2 nom

13.46 nom

I 43/4/28

0_44308IC

43.2 ± 0.9

4.1 ± 0.13

27.9 ± 0.6

E 43

F_44310EC

43.2 ± 0.9

9.50 ± 0.13

27.9 ± 0.6

5.4 ± 0.13

34.7 min

8.1 ± 0.2

4.7 max

13.2 min

I 43

F_44310IC

43.2 ± 0.9

4.1 ± 0.13

27.9 ± 0.6

E 58 C

C_45810EC

58.42 ± 1.2

10.54 ± 0.2

38.1 ± 0.8

6.35 min

50.0 min

8.1 ± 0.2

3.7 ref

21.4 ref

I 58 C

C_45810IC

58.42 ± 1.2

4.06 ± 0.13

38.1 ± 0.8

E 58

F_45810EC

58.42 ± 1.2

10.54 ± 0.2

38.1 ± 0.8

6.35 min

50.0 min

8.1 ± 0.2

3.7 ref

21.4 ref

I 58

F_45810IC

58.42 ± 1.2

4.06 ± 0.13

38.1 ± 0.8

E 64 C

C_46410EC

64.0 ± 0.76

10.2 ± 0.1

50.8 ± 0.81

5.03 min

53.16 min

10.16 ± 0.18

5.08 ± 0.12

21.8 ± 0.25

I 64 C

C_46410IC

64.0 ± 1.27

5.08 ± 0.13

50.8 ± 1.02

E 64

F_46410EC

64.0 ± 0.76

10.2 ± 0.1

50.8 ± 0.81

5.03 min

53.16 min

10.16 ± 0.18

5.08 ± 0.12

21.8 ± 0.25

I 64

F_46410IC

64.0 ± 1.27

5.08 ± 0.13

50.8 ± 1.02

E 102

0_49938EC

102.0 ± 1.0

20.3 ± 0.25

37.5 ± 0.4

13.3 ± 0.25

86.0 ± 1.0

14.0 ± 0.25

8.0 ref

36.0 ref

Magnetics-2021-Ferrite-Catalog-html.html
background image

MAGNETICS

36

HOW TO ORDER

SHAPE CODE

C

 – 

ER core with clip recesses 

F or O

 – 

ER core without clip recesses 

GEOMETRY CODE

EC

 – 

ER core 

IC

 – 

I core 

 

For clip slot dimensions see individual datasheets. 

ER cores are sold per piece (for sets multiply by 2).  

See page 18 for information on gapped cores.  

For an E-core gapped to an A

L

 value when mated with the standard 

I-core, add “-EI” to the end of the part number.

O R 4 09 06 EC

Shape code 
Ferrite core material
Used for all ferrite types
Approximate length in mm
Approximate depth in mm
Geometry code

ER Cores

ER CORE

I CORE

ER cores are a cross between planar E cores and pot cores. The round center post of the ER core 
offers minimal winding resistance. In addition, they offer better space utilization and shielding 
than with rectangular center leg planar cores. When compared with non-planar cores, ERs offer 
minimal height and better thermal performance. E/I combinations facilitate economical assembly. 

Typical applications of ER cores include differential mode inductors and power transformers.

NOMINAL A

L

 (mH/1000T)

TYPE/SIZE

ORDERING CODE

L

R

P

F

ER 9/5

0_40906EC

525

973

1,053

1,270

ER 11/6

0_41126EC

725

1,400

1,690

1,780

ER 12.5/8.5

0_41308EC

950

1,700

1,800

1,950

I 12.5/8.5

0_41308IC

1,000

1,800

1,900

2,000

ER 14.5/6

0_41426EC

850

1,600

1,700

1,850

ER 18/3/10

0_41826EC

1,300

2,623

2,770

3,104

ER 20/7/14

C_42014EC

1,600

3,788

4,026

4,575

I 20/7/14 

C_42014IC

2,150

4,500

4,900

5,500

ER 20/7/14 

F_42014EC

1,600

3,788

4,026

4,575

I 20/7/14 

F_42014IC

2,150

4,479

4,740

5,338

ER 23/3/12

0_42313EC

1,850

3,800

4,030

4,540

ER 25/5.5/18

0_42517EC

2,650

5,700

6,050

6,900

I 25/2/18

0_42517IC

3,300

7,021

7,447

8,427

ER 25/8/18

0_42521EC

2,300

5,440

5,801

6,649

ER 30/8/20

0_43021EC

2,400

5,465

5,841

6,729

I 30/2.5/20

0_43021IC

3,200

6,550

7,784

8,850

ER 32/6/25

0_43225EC

6,950

7,350

8,200

Magnetics-2021-Ferrite-Catalog-html.html
background image

www.mag-inc.com

37

Refer to page 62 for additional hardware information.

DIMENSIONS (mm)

TYPE/SIZE

ORDERING CODE

A

B

C

D

E

F

G

ER 9/5

0_40906EC

9.5 + 0/-0.3

2.45 ± 0.05

5.0 + 0/-0.2

1.6 + 0.15/-0

7.5 + 0.4/-0

3.5 + 0/-0.2

7.1 + 0.35/-0

ER 11/6

0_41126EC

11.0 + 0/-0.35

2.45 ± 0.05

6.0 + 0/-0.2

1.5 + 0.15/-0

8.7 + 0.3/-0

4.25 + 0/-0.25

8.0 + 0/-0.25

ER 12.5/8.5

0_41308EC

12.8 ± 0.3

2.85 ± 0.8

8.7 ± 0.25

1.75 ± 0.13

11.2 ± 0.3

5.0 ± 0.15

9.05 ± 0.3

I 12.5/8.5

0_41308IC

12.8 ± 0.3

1.1 ± 0.1

8.7 ± 0.25

ER 14.5/6

0_41426EC

14.7 + 0/-0.4

2.95 ± 0.5

6.8 + 0/-0.2

1.55 + 0.2/-0

11.6 + 0.4/-0

4.8 + 0/-0.2

ER 18/3/10

0_41826EC

18.0 ± 0.35

3.15 ± 0.1

9.7 ± 0.2

1.6 ± 0.1

15.6 ± 0.3

6.2 ± 0.15

13.5 min

ER 20/7/14

C_42014EC

20.0 ± 0.35

6.8 ± 0.1

14.0 ± 0.3

4.6 ± 0.15

18 ± 0.35

8.8 ± 0.15

12.86 ± 0.35

I 20/7/14

C_42014IC

20.0 ± 0.35

2.3 ± 0.05

14.0 ± 0.3

1.9 ± 0.1

3.0 ± 0.1

ER 20/7/14 

F_42014EC

20 .0 ± 0.35

6.8 ± 0.1

14.0 ± 0.3

4.6 ± 0.15

18.0 ± 0.35

8.8 ± 0.15

12.86 ± 0.35

I 20/7/14 

F_42014IC

20.0 ± 0.35

1.9 ± 0.05

14.0 ± 0.3

ER 23/3/12

0_42313EC

23.2 ± 0.45

3.6 ± 0.1

12.5 ± 0.25

1.6 ± 0.1

20.2 ± 0.4

8.0 ± 0.2

17.5 min

ER 25/5.5/18

0_42517EC

25.0 ± 0.4

5.6 ± 0.1

18.0 ± 0.3

2.75 ± 0.15

22.0 ± 0.4

11.0 ± 0.2

15.2 ± 0.7

I 25/2/18

0_42517IC

25.0 ± 0.4

2.3 ± 0.05

18.0 ± 0.3

ER 25/8/18

0_42521EC

25.0 ± 0.4

8.0 ± 0.1

18.0 ± 0.3

5.15 ± 0.15

22.0 ± 0.4

11.0 ± 0.2

15.2 ± 0.7

ER 30/8/20

0_43021EC

30.0 ± 0.4

8.0 ± 0.15

20.0 ± 0.3

5.3 ± 0.2

26.0 ± 0.4

11.0 ± 0.2

19.45 ± 0.4

I 30/2.5/20

0_43021IC

30.0 ± 0.4

2.7 ± 0.1

20.0 ± 0.3

ER 32/6/25

0_43225EC

32.1 + 0.55/-0.45

6.0 ± 0.13

25.4 ± 0.4

2.9+0/-0.25

27.2 ± 0.4

12.4 ± 0.15

27.2 ± 0.4

MAGNETIC DATA

HARDWARE

TYPE/SIZE

ORDERING CODE

I

(mm)

A

(mm

2

)

A

e

 min 

(mm

2

)

V

(mm

3

)

WaAc  

(cm

4

)

Weight 

(grams per set)

Bobbins

ER 9/5

0_40906EC

14.2

8.47

7.6

120

0.003

1

SMB09068A

ER 11/6

0_41126EC

14.7

11.9

10.3

174

0.004

1

ER 12.5/8.5

0_41308EC

17.5

19.9

19.2

348

0.011

2

I 12.5/8.5

0_41308IC

15.9

19.8

19.2

315

0.006

1

ER 14.5/6

0_41426EC

19.0

17.6

17.3

333

0.011

2

ER 18/3/10

0_41826EC

22.1

30.2

30.1

667

0.025

3

ER 20/7/14

C_42014EC

33.2

59.0

55.0

1,960

0.142

10.2

I 20/7/14

C_42014IC

25.1

59.8

55.0

1,500

0.072

8.0

ER 20/7/14 

F_42014EC

33.2

59.0

55.0

1,960

0.142

10.1

I 20/7/14 

F_42014IC

25.5

57.3

52.5

1,460

0.069

8.0

ER 23/3/12

0_42313EC

26.6

50.2

50.0

1,340

0.055

6.4

ER 25/5.5/18

0_42517EC

33.8

91.8

86.4

3,100

0.151

16.4

I 25/2/18

0_42517IC

26.4

89.7

82.8

2,370

0.076

13.1

ER 25/8/18

0_42521EC

41.4

100

95.0

4,145

0.324

22.0

ER 30/8/20

0_43021EC

46.0

108

95.0

4,970

0.488

26.4

I 30/2.5/20

0_43021IC

36.2

108

95.0

3,910

0.244

20.8

ER 32/6/25

0_43225EC

38.2

141

121

5,400

0.328

27.5

Magnetics-2021-Ferrite-Catalog-html.html
background image

MAGNETICS

38

U, I Cores

U cores are ideal for many power transformer applications. The long legs support low leakage 
inductance designs and facilitate superior voltage isolation. U/I combinations provide for 
economical assembly.

NOMINAL A

L

 (mH/1000T)

TYPE/SIZE

ORDERING CODE

L

R

P

F

J

W

U 11/4/6

0_41106UC

860

914

1,010

1,662

I 11/2/6

0_41106IC

960

1,020

1,150

1,687

 

U 22/21/6

0_42220UC

893

973

1,360

2,107

3,429

U 25/13/13

0_42512UC

1,907

2,067

2,480

4,400

U 25/16/6

0_42515UC

1,107

1,333

1,600

2,507

I 25/6/6

0_42516IC

660

1,480

1,650

1,770

2,907

U 25/16/12

0_42530UC

2,093

2,280

2,740

4,860

U 93/76/16 

0_49316UC

3,450

3,730

4,110

8,100

I 93/28/16 

0_49316IC

4,600

4,960

5,840

10,500

U 93/76/30

0_49330UC

7,219

U 93/76/32

0_49332UC

7,700

U 126/91/20

0_49920UC

3,000

3,572

4,265

6,967

U 102/57/25

0_49925UC

4,533

5,500

6,500

I 102/25/25

0_49925IC

5,707

6,200

7,440

HOW TO ORDER

GEOMETRY CODE

UC

 – 

U core 

IC

 – 

I core 

U and I cores are sold per piece (for sets multiply by 2). 

O F 4 22 20 UC

Shape code 
Ferrite core material
Used for all ferrite types
Approximate length in mm
Approximate width in mm
Geometry code

Magnetics-2021-Ferrite-Catalog-html.html
background image

www.mag-inc.com

39

DIMENSIONS (mm)

TYPE/SIZE

ORDERING CODE

A

B

C

D

E

L

U 11/4/6

0_41106UC

10.85 ± 0.2

4.19 ± 0.13

6.3 ± 0.13

2.24 ± 0.13

7.19 ± 0.2

1.83 ± 0.13

I 11/2/6

0_41106IC

10.8 ± 0.2

1.83 ± 0.12

6.3 ± 0.13

U 22/21/6

0_42220UC

22.1 ± 0.38

20.6 ± 0.38

6.27 ± 0.18

13.98 min

9.5 ± 0.38

6.27 ± 0.18

U 25/13/13

0_42512UC

25.4 ± 0.5

12.9 ± 0.4

12.7 ± 0.4

6.35 min

12.8 ref

6.3 ± 0.13

U 25/16/6

0_42515UC

25.4 ± 0.51

15.9 ref

6.35 ± 0.12

9.27 min

12.7 ref

6.45 ± 0.15

I 25/6/6

0_42516IC

25.4 + 0.64/-0.51

6.35 ± 0.13

6.35 ± 0.13

U 25/16/12

0_42530UC

25.4 ± 0.51

15.9 ref

12.7 ± 0.25

9.27 min

12.7 ref

6.45 ± 0.15

U 93/76/16 

0_49316UC

93.0 ± 1.8

76.0 ± 0.5

16.0 ± 0.6

48.0 ± 0.9

36.2 ± 1.2

28.4 ref

I 93/28/16 

0_49316IC

93.0 ± 1.8

27.5 ± 0.5

16.0 ± 0.6

U 93/76/30

0_49330UC

93.0 ± 1.8

76.0 ± 0.5

30.0 ± 0.6

48.0 ± 0.9

36.2 ± 1.2

28.4 ref

U 93/76/32

0_49332UC

93.0 ± 1.8

76.0 ± 0.5

32.0 ± 0.6

48.0 ± 0.9

36.2 ± 1.2

28.4 ref

U 126/91/20

0_49920UC

126.0 ± 4.0

91.0 ± 1.0

20.0 ± 0.6

63.0 ± 2.0

70.0 ± 2.0

28.0 ref

U 102/57/25

0_49925UC

101.6 ± 1.5

57.1 ± 0.4

25.4 ± 0.6

31.7 ± 0.75

50.8 ± 1

25.4 ± 0.8

I 102/25/25

0_49925IC

101.6 ± 1.5

25.4 ± 0.4

25.4 ± 0.6

MAGNETIC DATA

HARDWARE

TYPE/SIZE

ORDERING CODE

I

(mm)

A

(mm

2

)

A

e

 min 

(mm

2

)

V

(mm

3

)

WaAc  

(cm

4

)

Weight 

(grams per set)

Bobbins

U 11/4/6

0_41106UC

29.2

12

11.5

350

0.02

1.8

I 11/2/6

0_41106IC

24.6

11.5

11.5

283

0.01

 1.5

U 22/21/6

0_42220UC

95.8

39.7

39.7

4,130

0.63

19

U 25/13/13

0_42512UC

68.9

80.0

80.0

4,170

0.78

29

U 25/16/6

0_42515UC

83.4

40.4

40.4

3,370

0.57

17

I 25/6/6

0_42516IC

64.3

40.3

40.3

2,590

0.32

13

U 25/16/12

0_42530UC

83.4

80.8

80.8

6,740

1.13

34

U 93/76/16 

0_49316UC

353

452

452

160,000

91.4

800

I 93/28/16 

0_49316IC

257

450

450

115,000

45.8

600

U 93/76/30

0_49330UC

354

840

840

297,000

173

1,490

U 93/76/32

0_49332UC

353

905

896

319,000

185

1,600

U 126/91/20

0_49920UC

480

560

560

268,800

286

1,360

U 102/57/25

0_49925UC

308

645

645

199,000

121

988

I 102/25/25

0_49925IC

245

645

645

158,000

60.7

784

Refer to page 62 for additional hardware information.

Magnetics-2021-Ferrite-Catalog-html.html
background image

MAGNETICS

40

NOMINAL A

L

 (mH/1000T)

TYPE/SIZE

ORDERING CODE

R

P

F

UR 41/21/11

0_44119UC

1,627

1,773

2,130

UR 41/21

0_44121UC

1,880

2,047

2,465

UR 41/25

0_44125UC

1,600

1,747

2,105

UR 41/30

0_44130UC

1,400

1,520

1,830

UR 57

0_45716UC

2,600

3,061

3,622

UR 59

0_45917UC

3,027

3,274

3,881

UR 64*

0_46420UC

3,787

4,098

4,864

UR Cores

UR cores are an excellent choice for high current designs and conditions where vibration occurs.  The 
open window area accommodates large conductors.  Holes through the center or grooves on the 
outer legs of the core provide a method to secure the core to the PCB with mounting hardware. 

Typical applications include welding output transformers, audio amplifiers, traction, and other high-
voltage power transformers.

HOW TO ORDER

UR cores are sold per piece (for sets multiply by 2). 

*For UR 64 size, refer to datasheets for differences in geometry.

O

4 41 25 UC

Shape code 
Ferrite core material
Used for all ferrite types
Approximate length in mm
Approximate depth in mm
Geometry code

P

Magnetics-2021-Ferrite-Catalog-html.html
background image

www.mag-inc.com

41

DIMENSIONS (mm)

TYPE/SIZE

ORDERING CODE

A

B

C

D

E

S

T

UR 41/21/11

0_44119UC

41.78 ± 0.81

20.9 ± 0.12

11.94 ± 0.25

13.4 min

18.8 ± 0.56

3.18 nom

34.66 ref

UR 41/21

0_44121UC

41.78 ± 0.81

20.62 ± 0.13

11.94 ± 0.25

11.1 ± 0.2

18.8 ± 0.56

3.18 ± 0.13

34.66 nom

UR 41/25

0_44125UC

41.78 ± 0.81

25.4 ± 0.13

11.94 ± 0.25

15.9 ± 0.2

18.8 ± 0.56

3.18 ± 0.13

34.66 nom

UR 41/30

0_44130UC

41.78 ± 0.81

30.5 ± 0.3

11.94 ± 0.25

20.8 min

18.8 ± 0.56

3.18 ± 0.13

34.66 ref

UR 57

0_45716UC

57.65 ± 1.7

28.6 + 0/-0.4

15.9 ± 0.4

15.5 + 1/-0

27.8 ± 0.9

4.8 ± 0.2

49.8 ± 0.8

UR 59

0_45917UC

59.34 ± 1.75

35.8 ± 0.4

17.0 ± 0.4

21.5 ± 0.8

26.5 ± 0.1

4.5 ± 0.2

50.5 ± 0.1

UR 64

0_46420UC

64.0 ± 1.95

40.5 ± 0.2

24.0 ± 0.3

26.5 ± 0.4

24.1 ± 0.9

4.0 min

44.0 ± 0.6

MAGNETIC DATA

HARDWARE

TYPE/SIZE

ORDERING CODE

I

(mm)

A

(mm

2

)

A

e

 min 

(mm

2

)

V

(mm

3

)

WaAc  

(cm

4

)

Weight 

(grams per set)

Bobbins

UR 41/21/11

0_44119UC

121.2

91.1

80.5

11,000

2.75

54

00B411901

UR 41/21

0_44121UC

113

104

84.0

11,800

2.81

55

UR 41/25

0_44125UC

134.4

113.1

105.4

15,196

4.0

64

UR 41/30

0_44130UC

154.8

112.1

105.4

17,346

5.25

75

UR 57

0_45716UC

163

171

171

27,900

8.84

140

UR 59

0_45917UC

189

210

210

39,700

13.8

198

UR 64

0_46420UC

210

290

290

61,000

21.9

320

Refer to page 62 for additional hardware information.

Magnetics-2021-Ferrite-Catalog-html.html
background image

MAGNETICS

42

NOMINAL A

L

 (mH/1000T)

TYPE/SIZE

ORDERING CODE

R

P

F

EC 35

0_43517EC

2,213

2,400

3,000

EC 41

0_44119EC

2,947

3,200

3,700

EC 52

0_45224EC

3,867

4,200

5,040

EC 70

0_47035EC

4,413

4,800

5,760

EC Cores

The round center leg and open window of EC cores allow for minimum winding resistance and 
efficient assembly. Long legs promote low and controlled leakage inductance and are useful for 
high voltage applications.

EC cores have standard channels for clamping assemblies. Plain bobbins, printed circuit bobbins 
and clamps are available for most sizes.

Magnetics EC cores are typically used in differential mode inductor and power transformer 
applications.

HOW TO ORDER

EC cores are sold per piece (for sets multiply by 2).  

See page 18 for information on gapped cores.

O R 4 70 35 EC

Shape code 
Ferrite core material
Used for all ferrite types
Approximate length in mm
Approximate width in mm
Geometry code

Magnetics-2021-Ferrite-Catalog-html.html
background image

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43

MAGNETIC DATA

HARDWARE

TYPE/SIZE

ORDERING CODE

I

(mm)

A

(mm

2

)

A

e

 min 

(mm

2

)

V

(mm

3

)

WaAc 

(cm

4

)

Weight 

(grams per set)

Bobbins

EC 35

0_43517EC

77.4

84.3

71

6,530

0.83

36

PCB351701

EC 41

0_44119EC

89.3

121

106

10,800

1.67

60

00B411901

EC 52

0_45224EC

105

180

141

18,800

3.87

111

00B5224B1

EC 70

0_47035EC

144

279

211

40,100

13.4

253

PCB703501

DIMENSIONS (mm)

TYPE/SIZE

ORDERING CODE

A

B

C

D

E

F

S

T

EC 35

0_43517EC

34.5 ± 0.8

17.3 ± 0.15

9.5 ± 0.3

12.3 ± 0.4

22.75 ± 0.55

9.5 ± 0.3

2.75 ± 0.25

28.5 ± 0.8

EC 41

0_44119EC

40.6 ± 1.0

19.5 ± 0.15

11.6 ± 0.3

13.9 ± 0.4

27.7 ± 0.7

11.6 ± 0.3

3.25 ± 0.25

33.6 ± 1

EC 52

0_45224EC

52.2 ± 1.3

24.2 ± 0.15

13.4 ± 0.35

15.9 ± 0.4

33.0 ± 0.9

13.4 ± 0.35

3.75 ± 0.25

44.0 ± 1.3

EC 70

0_47035EC

70.0 ± 1.7

34.5 ± 0.15

16.4 ± 0.4

22.75 ± 0.45

44.5 ± 1.2

16.4 ± 0.4

4.75 ± 0.25

59.6 ± 1.7

Refer to page 62 for additional hardware information.

Magnetics-2021-Ferrite-Catalog-html.html
background image

MAGNETICS

44

NOMINAL A

L

 (mH/1000T)

TYPE/SIZE

ORDERING CODE

L

R

P

F

EER 28/14/11

0_42814EC

1,340

2,700

3,352

3,896

EER 28/16/11

0_42817EC

1,150

2,500

2,913

3,400

EER 35L

0_43521EC

2,693

2,960

3,550

EER 40/22/13

0_44013EC

3,300

3,520

4,000

EER 42

0_44216EC

3,840

4,173

5,000

EER 48/18/17

0_44818EC

6,400

6,850

7,950

EER 48/21/21

0_44821EC

5,700

7,059

8,274

EER 53/18/18

0_45418EC

6,100

6,500

7,440

EER Cores

EER cores are an economical choice for transformers and inductors. The round center leg offers 
the advantage of a shorter winding path length than winding around a square center leg of equal 
area.

Differential mode inductors and power transformers are typical applications for Magnetics EER 
cores.

HOW TO ORDER

EER cores are sold per piece (for sets multiply by 2).

See page 18 for information on gapped cores.

O R 4 42 16 EC

Shape code 
Ferrite core material
Used for all ferrite types
Approximate length in mm
Approximate height or width in mm
Geometry code

Magnetics-2021-Ferrite-Catalog-html.html
background image

www.mag-inc.com

45

DIMENSIONS (mm)

TYPE/SIZE

ORDERING CODE

A

B

C

D

E

F

EER 28/14/11

0_42814EC

28.55 ± 0.55

14 ± 0.2

11.4 ± 0.35

9.75 ± 0.4

21.75 ± 0.5

9.9 ± 0.25

EER 28/16/11

0_42817EC

28.55 ± 0.55

16.7 ± 0.25

11.4 ± 0.35

12.65 ± 0.4

21.75 ± 0.5

9.9 ± 0.25

EER 35L

0_43521EC

35.0 ± 0.65

20.7 ± 0.2

11.4 ± 0.35

14.75 ± 0.35

26.15 ± 0.55

11.3 ± 0.25

EER 40/22/13

0_44013EC

40.0 ± 0.7

22.4 ± 0.2

13.4 ± 0.35

15.45 ± 0.35

29.6 ± 0.6

13.3 ± 0.25

EER 42

0_44216EC

42.15 ± 0.85

21.0 ± 0.2

14.7 ± 0.3

15.6 min

31.0 ± 0.6

14.7 ± 0.3

EER 48/18/17

0_44818EC

48.0 ± 1.0

18.0 ± 0.2

17.6 ± 0.4

11.45 ± 0.25

36.8 ± 0.8

17.6 ± 0.4

EER 48/21/21

0_44821EC

48.0 ± 1.0

21.2 + 0/-0.4

21 + 0.3/-0.5

14.7 + 0.7/-0

38 + 0.5/-0.8

18.0 ± 0.3

EER 53/18/18

0_45418EC

53.5 ± 1.0

18.3 ± 0.2

17.95 ± 0.35

11.1 ± 0.3

40.65 ± 0.85

17.9 ± 0.4

MAGNETIC DATA

HARDWARE

TYPE/SIZE

ORDERING CODE

I

(mm)

A

(mm

2

)

A

e

 min 

(mm

2

)

V

(mm

3

)

WaAc  

(cm

4

)

Weight 

(grams per set)

Bobbins

EER 28/14/11

0_42814EC

64.0

81.4

77.0

5,260

0.532

28

EER 28/16/11

0_42817EC

75.5

81.4

77.0

6,142

0.693

32

EER 35L

0_43521EC

90.8

107

100

9,710

1.58

49

PCB3521LA

EER 40/22/13

0_44013EC

98.0

149

139

14,600

2.16

74

EER 42

0_44216EC

98.7

175

166

17,300

2.98

106

PCB4216FA

EER 48/18/17

0_44818EC

86.0

232

223

19,900

2.93

102

EER 48/21/21

0_44821EC

100

255

248

25,500

4.43

128

EER 53/18/18

0_45418EC

91.8

250

240

23,000

3.61

122

Refer to page 62 for additional hardware information.

Magnetics-2021-Ferrite-Catalog-html.html
background image

MAGNETICS

46

NOMINAL A

L

 (mH/1000T)

TYPE/SIZE

ORDERING CODE

L

R

P

F

T

J

EFD 10

0_41009EC 

280

585

622

698

923

EFD 12

0_41212EC 

380

760

800

844

2,600

EFD 15

0_41515EC 

400

893

973

1,170

1,140

1,933

EFD 20

0_42019EC 

650

1,300

1,633

1,881

1,540

2,696

EFD 25

0_42523EC 

1,000

2,093

2,280

2,730

2,660

4,507

EFD 30

0_43030EC 

1,000

2,200

2,695

3,137

2,520

4,668

The industry standard flat design of EFD cores offers excellent space utilization for transformers 
or inductors. The optimized cross-sectional area is ideal for very flat compact transformer 
applications.

EFD cores are designed for compact transformers and inductor applications.

EFD Cores

HOW TO ORDER

EFD cores are sold per piece (for sets multiply by 2).  

See page 18 for information on gapped cores.

O R 4 15 15 EC

Shape code 
Ferrite core material
Used for all ferrite types
Approximate length in mm
Approximate width (per set) in mm
Geometry code

Magnetics-2021-Ferrite-Catalog-html.html
background image

www.mag-inc.com

47

MAGNETIC DATA

HARDWARE

TYPE/SIZE

ORDERING CODE

I

(mm)

A

(mm

2

)

A

e

 min 

(mm

2

)

V

(mm

3

)

WaAc 

(cm

4

)

Weight 

(grams per set)

Bobbins

EFD 10

0_41009EC

23.7

7.2

6.5

171

0.004

0.9

PCB1009B1

EFD 12

0_41212EC

28.5

11.4

10.7

325

0.01

1.8

PCB1212B1

EFD 15

0_41515EC

34.0

15.0

12.2

510

0.02

2.8

PCB1515B1

EFD 20

0_42019EC

47.0

31.0

29.0

1,460

0.09

7.0

PCB2019B1

EFD 25

0_42523EC

57.0

58.0

55.0

3,300

0.24

16.2

PCB2523B1

EFD 30

0_43030EC

68.0

69.0

66.0

4,700

0.34

24.0

PCB3030B1

DIMENSIONS (mm)

TYPE/SIZE

ORDERING CODE

A

B

C

D

E

F

K

L

M

EFD 10

0_41009EC

10.5 ± 0.3

5.2 ± 0.1

2.7 ± 0.1

3.75 ± 0.15 7.65 ± 0.25 4.55 ± 0.15 4.45 ± 0.05

1.43 ref

1.55 ref 

EFD 12

0_41212EC

12.5 ± 0.3

6.2 ± 0.1

3.5 ± 0.1

4.55 ± 0.15 9.0 ± 0.25

5.4 ± 0.15

2.0 ± 0.1

1.75 ref

1.8 ref

EFD 15

0_41515EC

15.0 ± 0.4

7.5 ± 0.15 4.65 ± 0.15 5.5 ± 0.25 11.0 ± 0.35 5.3 ± 0.15

2.4 ± 0.1

2.0 nom

2.85 nom 

EFD 20

0_42019EC

20.0 ± 0.55 10.0 ± 0.15 6.65 ± 0.15 7.7 ± 0.25

15.4 ± 0.5

8.9 ± 0.2

3.6 ± 0.15

2.3 ref

3.25 ref 

EFD 25

0_42523EC

25.0 ± 0.66 12.5 ± 0.15  9.1 ± 0.2

9.05 min

18.1 min

11.4 ± 0.2

5.2 ± 0.15

3.15 ± 0.2

3.65 ± 0.2

EFD 30

0_43030EC

30.0 ± 0.8 15.0 ± 0.15

9.1 ± 0.2

11.2 ± 0.3 22.4 ± 0.75 14.6 ± 0.25 4.9 ± 0.15

3.8 ref

3.9 ref

Refer to page 62 for additional hardware information.

Magnetics-2021-Ferrite-Catalog-html.html
background image

MAGNETICS

48

NOMINAL A

L

 (mH/1000T)

TYPE/SIZE

ORDERING CODE

L

R

P

F

T

ETD 29

0_42929EC

 1,100 

2,250 

2,843

3,316

ETD 34 

0_43434EC

2,707

2,933

3,600

ETD 39 

0_43939EC

2,973

3,227

4,050

3,650

ETD 44 

0_44444EC 

3,667

4,000

4,950

4,460

ETD 49 

0_44949EC

4,093

4,440

5,400

5,140

ETD 54 

0_45454EC 

5,200

6,281

7,400

ETD 59 

0_45959EC 

5,747

6,240

7,500

7,340

ETD 69

0_47054EC

3,533

ETD Cores

ETD cores are an economical choice for transformers or inductors. ETDs offer a round center leg 
for minimum winding resistance. Dimensions are optimized for power transformer efficiency. 

Typical applications of Magnetics ETD cores include differential mode inductors and power 
transformers.

HOW TO ORDER

ETD cores are sold per piece (for sets multiply by 2.)  

See page 18 for information on gapped cores.

O R 4 39 39 EC

Shape code 
Ferrite core material
Used for all ferrite types
Approximate length in mm
Approximate height (per set) in mm
Geometry code

Magnetics-2021-Ferrite-Catalog-html.html
background image

www.mag-inc.com

49

DIMENSIONS (mm)

TYPE/SIZE

ORDERING CODE

A

B

C

D

E

F

ETD 29 

0_42929EC 

 30.6 + 0/-1.6 

15.8 ± 0.2 

9.8 + 0/-0.6

 11.0 ± 0.3 

22.0 + 1.4/-0

 9.8 + 0/-0.6

ETD 34 

0_43434EC 

 35.0 + 0/-1.6 

17.3 ± 0.2 

11.1 + 0/-0.6

 11.8 + 0.6/-0

 25.6 + 1.4/-0 

11.1 + 0/-0.6

ETD 39 

0_43939EC 

40.0 + 0/-1.8 

19.8 ± 0.2 

12.8 + 0/-0.6 

14.2 + 0.8/-0 

29.3 + 1.6/-0 

12.8 + 0/-0.6

ETD 44

0_44444EC

 45.0 + 0/-2.0

 22.3 ± 0.2 

15.2 + 0/-0.6 

16.1 + 0.8/-0 

32.5 + 1.6/-0

 15.2 + 0/-0.6

ETD 49

0_44949EC 

49.8 + 0/-2.2

 24.7 ± 0.2 

16.7 + 0/-0.6

 17.7 + 0.8/-0 

36.1 + 1.8/-0

 16.7 + 0/-0.6

ETD 54

0_45454EC 

54.5 ± 1.3

 27.6 ± 0.2 

18.9 ± 0.4

 20.2 ± 0.4

 41.2 ± 1.1 

18.9 ± 0.4

ETD 59 

0_45959EC 

59.8 ± 1.3 

31.0 ± 0.2

 21.65 ± 0.45 

22.1 min 

44.7 ± 1.09 

21.65 ± 0.45

ETD 69

0_47054EC

68.58 ± 2.1

54.0 ± 0.4

20.0 ± 0.6

41.85 min

54.1 + 1.35/-1.6

20.0 ± 0.5

MAGNETIC DATA

HARDWARE

TYPE/SIZE

ORDERING CODE

I

(mm)

A

(mm

2

)

A

e

 min 

(mm

2

)

V

(mm

3

)

WaAc  

(cm

4

)

Weight 

(grams per set)

Bobbins

ETD 29 

0_42929EC 

72.0

76.0

71.0

5,470

0.71

28

PCB2929B1

ETD 34 

0_43434EC 

78.6

97.1

91.6

7,640

1.19

40

PCB3434FB

ETD 39 

0_43939EC 

92.2

125

123

11,500

2.18

60

PCB3939SB

ETD 44

0_44444EC

103

173

172

17,800

3.68

94

PCB444418

ETD 49

0_44949EC 

114

211

209

24,000

5.72

124

PCB4949WA

ETD 54

0_45454EC 

127

280

280

35,500

8.88

180

PCB5454B1

ETD 59 

0_45959EC 

139

368

360

51,500

13.7

248

PCB5959AA

ETD 69

0_47054EC

231

334

314

77,100

35.7

371

Refer to page 62 for additional hardware information.

Magnetics-2021-Ferrite-Catalog-html.html
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MAGNETICS

50

Ferrites can be pressed in block form and then machined into intricate shapes. Where large sizes 
are required, it is possible to assemble them from two or more smaller machined or pressed 
sections; the variety of sizes and shapes becomes limitless.

Features of Magnetics ferrite blocks include low porosity, extreme hardness, uniform physical 
properties, high density and ease of machining. J material offers high permeability; R material is 
suitable for power applications.

HOW TO ORDER

GEOMETRY CODE

IC

 – 

I core 

FB

 – 

Block core 

Block cores and I cores are sold per piece.

O R 4 99 66 FB

Shape code 
Ferrite core material
Used for all ferrite types
Approximate length in mm
Approximate height in mm
Geometry code

Block Cores

AVAILABLE MATERIALS

TYPE/SIZE

ORDERING CODE

L

R

P

F

J

I 11/4/6

0_41106IC

P

P

P

P

I 12.5/8.5

0_41308IC

P

P

P

P

I 18

F_41805IC

P

P

P

P

I 20/7/14

F_42014IC

P

P

P

P

I 22/4/7

0_42107IC

P

P

P

P

I 22

F_42216IC

P

P

P

P

I 25/6/6

0_42516IC

P

P

P

P

P

I 32

F_43208IC

P

P

P

P

I 36/6/18

0_43618IC

P

P

I 38

F_43808IC

P

P

P

P

I 40/4/10

0_44008IC

P

P

P

P

I 43/6/15

0_44020IC

P

P

I 43/4/28

0_44308IC

P

P

P

I 43

F_44310IC

P

P

P

I 58

F_45810IC

P

P

P

I 64

F_46410IC

P

P

P

I 93/28/16

0_49316IC

P

P

P

P

I 102/25/25

0_49925IC

P

P

P

FB 104/66/18

0_49966FB

P

P

P

FB 100/85/25

0_49985FB

P

FB 120/120/38

0_49938FB

P

Magnetics-2021-Ferrite-Catalog-html.html
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www.mag-inc.com

51

DIMENSIONS (mm)

TYPE/SIZE

ORDERING CODE

A

B

C

Weight 

(grams per piece)

I 11/4/6

0_41106IC

10.8 ± 0.2

1.83 ± 0.12

6.3 ± 0.13

0.7

I 12.5/8.5

0_41308IC

12.8 ± 0.3

1.1 ± 0.1

8.7 ± 0.25

0.6

I 18

F_41805IC

18.0 ± 0.41

2.39 ± 0.1

10.0 ± 0.2

1.8

I 20/7/14

F_42014IC

20.0 ± 0.35

1.9 ± 0.05

14.0 ± 0.3

2.4

I 22/4/7

0_42107IC

21.8 ± 0.4

2.3 ± 0.2

7.8 ± 0.3

2.4

I 22

F_42216IC

21.8 ± 0.4

2.95 ± 0.1

15.8 ± 0.3

4.0

I 25/6/6

0_42516IC

25.4 + 0.64/-0.51

6.35 ± 0.13

6.35 ± 0.13

4.5

I 32

F_43208IC

31.75 ± 0.64

3.18 ± 0.13

20.32 ± 0.41

10.0

I 36/6/18

0_43618IC

35.56 ± 0.05

3.68 ± 0.3

17.8 ± 0.4

11.0

I 38

F_43808IC

38.1 ± 0.76

3.81 ± 0.13

25.4 ± 0.51

18.0

I 40/4/10

0_44008IC

40.64 ± 0.5

4.45 ± 0.25

10.7 ± 0.25

9.0

I 43/6/15

0_44020IC

43.0 + 0/-1.7

5.9 ± 0.2

15.2 + 0/-0.6

19.2

I 43/4/28

0_44308IC

43.2 ± 0.9

4.1 ± 0.13

27.9 ± 0.6

24.0

I 43

F_44310IC

43.2 ± 0.9

4.1 ± 0.13

27.9 ± 0.6

24.0

I 58

F_45810IC

58.42 ± 1.2

4.06 ± 0.12

38.1 ± 0.8

44.0

I 64

F_46410IC

64.0 ± 1.27

5.08 ± 0.13

50.8 ± 1.02

78.0

I 93/28/16

0_49316IC

93.0 ± 1.8

27.5 ± 0.5

16.0 ± 0.6

200

I 102/25/25

0_49925IC

101.6 ± 1.5

25.4 ± 0.4

25.4 ± 0.6

310

FB 104/66/18

0_49966FB

104.0 ± 2

66.0 ± 1.5

18.5 ± 0.4

595

FB 100/85/25

0_49985FB

100.0 ± 2

85.0 ± 2

25.4 ± 0.5

1,065

FB 120/120/38

0_49938FB

120.0 ± 3

120.0 ± 3

38.0 ± 0.5

2,699

Magnetics-2021-Ferrite-Catalog-html.html
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MAGNETICS

52

EP Cores

NOMINAL A

L

 (mH/1000T)

TYPE/SIZE

ORDERING CODE

L

R

P

F

T

J

W

EP 7

P_40707UG 

590

1,080

1,173

1,240

2,573

5,143

EP 10

P_41010UG 

530

1,040 

1,133

1,200

1,360

2,467

4,800

EP 13

P_41313UG 

760

1,533

1,667

2,000

2,000

3,733

7,143

EP 17

P_41717UG 

1,120

2,387

2,600

3,100

3,100

5,867

11,429

EP 20

P_42120UG 

1,930

4,227

4,600

5,000

5,000

9,600

19,286

EP cores are round center post cubical shapes which enclose the coil completely except for the 
printed circuit board terminals. This particular shape minimizes the effect of air gaps formed at 
mating surfaces in the magnetic path and provides a larger volume ratio to total space used. EP 
cores provide excellent shielding.

Typical applications for EP cores include differential mode and telecom inductors and signal 
transformers.

K

H

.059550"

.100"

ep_03.eps

Holes for bobbin pins

Holes for clip pins

HOW TO ORDER

EP cores are sold in sets. 

See page 19 for information on gapped cores.

P J 4 10 10 UG

Shape code 
Ferrite core material
Used for all ferrite types
Approximate length in mm
Approximate height (per set) in mm
Geometry code

Magnetics-2021-Ferrite-Catalog-html.html
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53

MAGNETIC DATA

HARDWARE

TYPE/SIZE

ORDERING CODE

I

(mm)

A

(mm

2

)

A

e

 min 

(mm

2

)

V

(mm

3

)

WaAc 

(cm

4

)

Weight 

(grams per set)

Bobbins

EP 7

P_40707UG

15.5

10.7

8.55

165

0.005

1.4

SMB07076A

EP 10

P_41010UG

19.3

11.3

8.55

215

0.01

2.8

PCB10108A

EP 13

P_41313UG

24.2

19.5

14.9

472

0.03

5.1

PCB1313B1

EP 17

P_41717UG

29.5

33.7

25.5

999

0.06

11.6

PCB17178A

EP 20

P_42120UG

41.1

78.7

60.8

3,230

0.24

27.6

PCB2120VB

Refer to page 62 for additional hardware information.

DIMENSIONS (mm)

TYPE/SIZE

ORDERING CODE

A

B

2B

C

D

2D

E

F

K

EP 7

P_40707UG

9.2 ± 0.2 

3.7 ± 0.05 

7.4 ± 0.1  6.35 ± 0.15 

2.5 min

5.0 min

7.2 min

3.4 max

1.7 ± 0.1

EP 10

P_41010UG

11.5 ± 0.3  5.15 ± 0.1  10.3 ± 0.2 

7.6 ± 0.2 

3.6 min

7.2 min

9.2 min

3.45 max

1.85 ± 0.1

EP 13

P_41313UG

12.8 + 0/-0.6

     6.45 ± 0.08

12.9 ± 0.16  9.0 + 0/-0.4  4.5 + 0.2/-0   9.0 + 0.4/-0        9.7 + 0.6/-0      4.5 + 0/-0.3 

2.4 ± 0.1 

EP 17

P_41717UG

18.0 ± 0.4

8.4 ± 0.1

16.8 ± 0.2 11.0 ± 0.25 5.7 ± 0.15

11.4 ± 0.3

12.0 ± 0.4

5.7 ± 0.18

3.3 ± 0.2

EP 20

P_42120UG

24.0 ± 0.5

10.7 ± 0.1

21.4 ± 0.2 15.0 ± 0.35 7.2 ± 0.15

14.4 ± 0.3

16.5 ± 0.4

8.8 ± 0.25

4.5 ± 0.2

Magnetics-2021-Ferrite-Catalog-html.html
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MAGNETICS

54

Pot Cores

 

Pot cores offer superior shielding and convenient mounting. Typical applications for pot cores 
include differential mode inductors, power transformers, power inductors, converter and inverter 
transformers, broadband and narrowband filters, transformers and telecom inductors.

NOMINAL A

L

 (mH/1000T)

TYPE/SIZE

ORDERING CODE

R

P

F

T

J

W

C

E

V

PC 7/4

0_40704UG

886

964

1,200

2,257

4,286

900

950

PC 9/5

0_40905UG

1,013

1,100

1,365

2,727

6,029

640

PC 11/7

0_41107UG

1,533

1,667

2,000

3,900

7,666

800

1,650

1,800

PC 11/9

0_41109UG

1,467

1,573

1,900

PC 14/8

0_41408UG

2,053

2,240

2,800

2,800

5,073

8,400

1,100

2,100

2,240

PC 18/11

0_41811UG

3,067

3,333

4,000

7,500

12,000

1,400

3,000

3,650

PC 18/14

0_41814UG

3,076

3,268

3,350

5,088

PC 22/13 

0_42213UG

4,040

4,400

4,900

5,200

9,100

16,000

1,700

3,900

4,650

PC 34/28

0_42438UG

7,550

PC 26/16 

0_42616UG

5,213

5,667

6,350

11,700

20,000

6,000

PC 28/23 

0_42823UG

7,000

PC 30/19

0_43019UG

6,680

7,267

8,100

15,100

25,000

2,800

8,000

7,000

PC 36/22

0_43622UG

8,700

9,467

10,200

10,800

17,500

32,667

9,000

PC 42/29

0_44229UG

9,200

10,000

12,000

11,450

40,000

9,000

HOW TO ORDER

Pot cores are sold in sets. 

See page 19 for information on gapped cores.

O P 4 14 08 UG

Shape code 
Ferrite core material
Used for all ferrite types
Approximate diameter in mm
Approximate height (per set) in mm
Geometry code

Magnetics-2021-Ferrite-Catalog-html.html
background image

www.mag-inc.com

55

DIMENSIONS (mm)

TYPE/SIZE

ORDERING CODE

A

B

2B

C

D

2D

E

F

G

H

PC 7/4

0_40704UG

7.24 ± 0.15 2.08 ± 0.05 4.16 ± 0.1

4.72 nom

1.4 min

2.79 min

5.74 min

3.0 max

1.52 min

1.09 ± 0.05

PC 9/5

0_40905UG

9.3 + 0/-0.3 2.7 + 0/-0.15 5.4 + 0/-0.3 6.5 ± 0.25 1.8 + 0.15/-0 3.6 + 0.3/-0 7.5 + 0.25/-0 3.9 + 0/-0.2

2.0 ± 0.2 2.04 + 0.06/-0

PC 11/7

0_41107UG

11.1 ± 0.2 3.25 ± 0.05

6.5 ± 0.1

6.8 ± 0.25 2.2 + 0.15/-0 4.4 + 0.3/-0 9.0 + 0.4/-0 4.7 + 0/-0.2

2.2 ± 0.3

2.1 ± 0.1

PC 11/9

0_41109UG

11.28 + 0/-0.4 3.43 ± 0.08 6.86 ± 0.16 7.54 ± 0.2 2.48 ± 0.08 4.96 ± 0.16 9.0 + 0.4/-0 4.7 + 0/-0.2 1.8 + 0.3/-0 2.0 + 0.08/-0

PC 14/8

0_41408UG

14.3 + 0/-0.5 4.18 ± 0.06 8.35 ± 0.13

9.5 ± 0.3

2.8 + 0.2/-0 5.6 + 0.4/-0 11.6 + 0.4/-0 6.0 + 0/-0.2 2.7 + 1.2/-0

3.1 ± 0.1

PC 18/11

0_41811UG

18.0 ± 0.4

5.3 ± 0.05

10.6 ± 0.1

13.4 ± 0.3

3.7 ± 0.1

7.4 ± 0.2 15.15 ± 0.25 7.45 ± 0.15

3.8 ± 0.6

3.1 ± 0.1

PC 18/14

0_41814UG

18.0 ± 0.4

7.1 ± 0.2

14.2 ± 0.4 11.8 ± 0.25 5.05 + 0.2/-0 10.1 + 0.4/-0 14.0 + 0.4/-0 7.4 + 0/-0.3 3.6 + 0.3/-0 3.1 ± 0.08

PC 22/13

0_42213UG

22.0 + 0/-0.8 6.7 ± 0.1

13.4 ± 0.2

15.0 ± 0.4 4.6 + 0.2/-0 9.2 + 0.4/-0 17.9 + 0.6/-0 9.4 + 0/-0.3

3.8 ± 0.6

4.4 + 0.3/-0

PC 34/28

0_42438UG

33.7 ± 0.5

13.9 ± 0.2

27.8 ± 0.4

24.8 ± 0.5 10.2 ± 0.15 20.4 ± 0.3

27.5 ± 0.6 13.65 ± 0.3

6.5 ± 0.3

5.56 ± 0.1

PC 26/16 

0_42616UG

25.5 ± 0.5

8.05 ± 0.1

16.1 ± 0.2

18.0 ± 0.4

5.5 min

11.0 min

21.6 ± 0.4

11.3 ± 0.2

3.8 ± 0.6

5.5 ± 0.1

PC 28/23 

0_42823UG

27.7 ± 0.4 11.43 ± 0.15 22.86 ± 0.3

19.7 nom

8.15 min

16.3 min

22.0 min

12.88 max

3.81 min

5.56 ± 0.1

PC 30/19

0_43019UG

30.0 ± 0.5 9.45 ± 0.05 18.9 ± 0.1

20.5 ± 0.5

6.5 min

13.0 min

25.4 ± 0.4

13.3 ± 0.2

4.3 ± 0.6

5.5 ± 0.1

PC 36/22

0_43622UG

35.6 ± 0.6 10.95 ± 0.05 21.9 ± 0.1

26.2 ± 0.6

7.3 min

14.6 min

30.4 ± 0.5

15.9 ± 0.3

4.9 ± 0.6

5.55 ± 0.15

PC 42/29

0_44229UG

42.4 ± 0.7 14.7 ± 0.05 29.4 ± 0.1

32.0 ± 0.7

10.15 min

20.3 min

36.3 ± 0.7

17.4 ± 0.3

5.1 ± 0.6

5.55 ± 0.15

MAGNETIC DATA

HARDWARE

TYPE/SIZE

ORDERING CODE

I

(mm)

A

(mm

2

)

A

e

 min 

(mm

2

)

V

(mm

3

)

WaAc  

(cm

4

)

Weight 

(grams per set)

Bobbins

PC 7/4

0_40704UG

9.9

7.0

5.9

69

0.002

0.5

00B0704B1

PC 9/5

0_40905UG

12.5

10.1

8.0

126

0.003

0.8

00B090501

PC 11/7

0_41107UG

15.5

16.2

13.2

251

0.006

1.8

00B1107B1

PC 11/9

0_41109UG

16.2

16.3

13.2

264

0.01

1.9

PC 14/8

0_41408UG

19.8

25.1

19.8

495

0.02

3.2

PCB1408TE

PC 18/11

0_41811UG

25.8

43.3

36.0

1,120

0.07

6.4

PCB181111

PC 18/14

0_41814UG

29.3

42.6

36.0

1,248

0.09

7.4

PC 22/13

0_42213UG

31.5

63.4

50.9

2,000

0.18

13

PCB221311

PC 26/16 

0_42616UG

37.6

93.9

77.4

3,530

0.39

20

PCB261611

PC 28/23 

0_42823UG

48.1

128

101

6,160

0.58

32

00B282301

PC 30/19

0_43019UG

45.2

137

116

6,190

0.74

34

PCB301911

PC 34/28

0_43428UG

58.1

159

122

9,230

22.4

47

PC 36/22

0_43622UG

53.2

202

172

10,700

1.53

57

PCB362211

PC 42/29

0_44229UG

68.6

265

214

18,200

3.68

104

PCB4229L1

Refer to page 62 for additional hardware information.

Magnetics-2021-Ferrite-Catalog-html.html
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MAGNETICS

56

NOMINAL A

L

 (mH/1000T)

TYPE/SIZE

ORDERING CODE

R

P

F

J

W

DS 14/08

D_41408UG

1,653

1,800

2,474

3,260

7,929

HS 14/08

H_41408UG

1,533

1,667

1,990

4,107

7,043

RS 14/08

S_41408UG

1,760

1,913

2,274

4,500

7,643

DS 18/11

D_41811UG

3,038

3,236

3,697

5,174

7,386

HS 18/11

H_41811UG

2,666

2,827

3,197

5,140

5,899

RS 18/11

S_41811UG

2,942

3,112

3,498

5,760

6,194

DS 23/11

D_42311UG

3,440

3,747

4,460

8,400

16,064

HS 23/11

H_42311UG

3,200

3,460

4,170

7,853

14,021

RS 23/11

S_42311UG

3,687

4,013

5,200

7,875

16,071

DS 23/18

D_42318UG

2,907

3,160

3,800

6,347

10,000

HS 23/18

H_42318UG

2,600

2,820

3,350

5,333

10,000

RS 23/18

S_42318UG

3,066

3,333

4,000

6,400

12,000

DS 26/16

D_42616UG

3,827

4,160

5,000

8,093

13,000

HS 26/16

H_42616UG

3,630

3,840

4,600

8,107

13,000

RS 26/16

S_42616UG

4,360

4,733

5,300

8,933

15,714

DS 30/19

D_43019UG

4,440

4,827

5,800

9,493

15,000

HS 30/19

H_43019UG

4,227

4,600

5,525

9,507

15,000

RS 30/19

S_43019UG

5,533

6,027

6,700

11,147

18,571

DS 36/22

D_43622UG

5,400

5,827

6,360

9,000

19,000

HS 36/22

H_43622UG

5,200

5,400

6,050

8,550

18,100

RS 36/22

S_43622UG

7,120

7,580

8,660

13,400

26,500

DS 42/29*

D_44229UG

6,500

7,000

7,900

12,200

RS 42/29

S_44229UG

8,300

8,900

10,400

17,500

RS-DS

Cores

Slab cores are the same as pot cores except for wider wire openings. A slab piece can be paired 
with a standard pot core round  to make an RS combination, or two slabs can be paired for a 
double slab (DS).

The RS geometry offers most of the shielding of a pot core but with more space available 
for terminating leads. DS cores offer a good compromise between shielding and thermal 
management.

Typical applications for RS and  DS combinations include low and medium power transformers, 
switched-mode power supplies, and multiple output converter and inverter transformers.

HOW TO ORDER

SHAPE CODE

D - DS Core with solid center post

H - DS Core with center hole

S - RS core 

RS-DS cores are sold in sets.

See page 19 for information on gapped cores.

*

For DS 42/29 size, see datasheets for differences in geometry.

S P 4 23 11 UG

Shape code 
Ferrite core material
Used for all ferrite types
Approximate length in mm
Approximate height (per set) in mm
Geometry code

Magnetics-2021-Ferrite-Catalog-html.html
background image

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57

MAGNETIC DATA

HARDWARE

TYPE/SIZE

ORDERING CODE

I

(mm)

A

(mm

2

)

A

e

 min 

(mm

2

)

V

(mm

3

)

WaAc  

(cm

4

)

Weight 

(grams per set)

Bobbins

DS 14/08

D_41408UG

22.6

24.6

23.5

556

0.02

3.4

PCB1408TE

HS 14/08

H_41408UG

20.6

21.0

19.2

433

0.02

2.6

PCB1408TE

RS 14/08

S_41408UG

20.2

23.0

19.2

460

0.02

2.8

PCB1408TE

DS 18/11

D_41811UG

29.1

40.0

36.3

1,167

0.07

7.1

PCB181111

HS 18/11

H_41811UG

28.7

37.2

31.0

1,070

0.05

6.6

PCB181111

RS 18/11

S_41811UG

27.2

40.6

32.9

1,110

0.07

6.8

PCB181111

DS 23/11

D_42311UG

26.8

51.2

37.8

1,370

0.08

10.0

PCB2311TA

HS 23/11

H_42311UG

27.0

48.2

37.8

1,300

0.08

9.1

PCB2311TA

RS 23/11

S_42311UG

28.6

61.0

53.6

1,740

0.10

10.5

PCB2311TA

DS 23/18

D_42318UG

39.9

58.0

40.7

2,310

0.21

13.0

PCB2318TA

HS 23/18

H_42318UG

40.1

53.4

40.7

2,130

0.20

12.1

PCB2318TA

RS 23/18

S_42318UG

41.6

62.2

53.6

2,590

0.22

14.0

PCB2318TA

DS 26/16

D_42616UG

38.9

77.0

62.7

3,000

0.32

15.0

PCB261611

HS 26/16

H_42616UG

39.0

72.1

62.7

2,810

0.30

14.4

PCB261611

RS 26/16

S_42616UG

38.3

82.6

62.7

3,180

0.35

15.5

PCB261611

DS 30/19

D_43019UG

49.5

120

111

5,940

0.63

31.0

PCB301911

HS 30/19

H_43019UG

46.1

111

96.0

5,110

0.60

26.0

PCB301911

RS 30/19

S_43019UG

45.6

123

96.0

5,610

0.67

30.5

PCB301911

DS 36/22

D_43622UG

56.9

162

140

9,250

1.22

47.6

PCB362211

HS 36/22

H_43622UG

57.6

157

140

9,030

1.19

46.3

PCB362211

RS 36/22

S_43622UG

55.4

179

140

9,944

1.36

51.0

PCB362211

DS 42/29

D_44229UG

76.0

232

211

17,600

3.22

90.5

PCB4229L1

RS 42/29

S_44229UG

72.3

244

211

17,641

3.35

90.6

PCB4229L1

DIMENSIONS (mm)

TYPE/SIZE

ORDERING CODE

A

B

2B

C

D

2D

E

F

G

H

DS 14/08

D_41408UG

14.05 ± 0.25 4.15 ± 0.08 8.3 ± 0.15

9.4 ± 0.15

2.9 ± 0.1

5.8 ± 0.2

11.8 ± 0.2

5.9 ± 0.1

7.6 min

HS 14/08

H_41408UG

14 ± 0.25 4.24 + 0/-0.13 8.48+0/-0.26 9.4 ± 0.15

2.8 min

5.58 min

11.6 min

5.99 max

7.6 min

3.1 ± 0.1

RS 14/08

S_41408UG

14 ± 0.25 4.24 + 0/-0.13 8.48+0/-0.26 9.4 ± 0.15

2.8 min

5.58 min

11.6 min

5.99 max

7.6 min

3.1 ± 0.1

DS 18/11

D_41811UG

18 ± 0.4

5.3

10.6 ± 0.15 11.9 ± 0.2

3.7

7.4 ± 0.2 15.15 ± 0.25 7.45 ± 0.15

11.2 min

HS 18/11

H_41811UG

18 ± 0.4

5.3 ± 0.07 10.6 ± 0.15 11.9 ± 0.2

3.7 ± 0.1

7.4 ± 0.2 15.15 ± 0.25 7.45 ± 0.15

11.2 min

3.1 ± 0.1

RS 18/11

S_41811UG

18 ± 0.4

5.3 ± 0.07 10.6 ± 0.15 11.9 ± 0.2

3.7 ± 0.1

7.4 ± 0.2 15.15 ± 0.25 7.45 ± 0.15

11.2 min

3.1 ± 0.1

DS 23/11

D_42311UG

22.86 ± 0.46 5.54 ± 0.13 11.08 ± 0.26 15.24 ± 0.25

3.63 min

7.26 min

17.93 min

9.9 max

13.21 min

HS 23/11

H_42311UG

22.86 ± 0.46 5.54 ± 0.13 11.08 ± 0.26 15.24 ± 0.25

3.63 min

7.26 min

17.93 min

9.9 max

13.21 min

5.1 ± 0.1

RS 23/11

S_42311UG

22.9 ± 0.45 5.5 ± 0.13

11 ± 0.25

15.2 ± 0.25 3.75 ± 0.13 7.5 ± 0.25 18.3 ± 0.35

9.7 ± 0.2

13.2 min

5.1 ± 0.1

DS 23/18

D_42318UG

22.86 ± 0.46

9 ± 0.18

18 ± 0.36 15.24 ± 0.25

6.93 min

13.86 min

17.93 min

9.9 max

13.21 min

HS 23/18

H_42318UG

22.86 ± 0.46

9 ± 0.18

18 ± 0.36 15.24 ± 0.25

6.93 min

13.86 min

17.93 min

9.9 max

13.2 min

5.08 ± 0.1

RS 23/18

S_42318UG

22.9 ± 0.45

9 ± 0.18

18 ± 0.35 15.25 ± 0.25 7.2 ± 0.18 14.4 ± 0.35 18.3 ± 0.35

9.7 ± 0.2

13.2 min

5.1 ± 0.1

DS 26/16

D_42616UG

25.5 ± 0.51 8.05 ± 0.1

16.1 ± 0.2

17.09 nom

5.51 min

11.02 min

21.21 min

11.48 max

15.5 min

HS 26/16

H_42616UG

25.5 ± 0.51 8.05 ± 0.1

16.1 ± 0.2

17.09 nom

5.51 min

11.02 min

21.21 min

11.48 max

15.5 min

5.56 ± 0.1

RS 26/16

S_42616UG

25.5 ± 0.51 8.05 ± 0.1

16.1 ± 0.2

17.09 nom

5.51 min

11.02 min

21.21 min

11.48 max

15.5 min

5.56 ± 0.1

DS 30/19

D_43019UG

30 ± 0.51

9.4 ± 0.1

18.8 ± 0.2 20.3 ± 0.25

6.5 min

13 min

25 min

13.51 max

15.49 min

HS 30/19

H_43019UG

30 ± 0.51

9.4 ± 0.1

18.8 ± 0.2 20.32 ± 0.25

6.5 min

13 min

25 min

13.51 max

15.49 min

5.56 ± 0.1

RS 30/19

S_43019UG

30 ± 0.51

9.4 ± 0.1

18.8 ± 0.2 20.32 ± 0.25

6.5 min

13 min

25 min

13.51 max

15.49 min

DS 36/22

D_43622UG

35.61 ± 0.51 10.85 ± 0.12 21.7 ± 0.25 23.85 nom

7.29 min

14.58 min

29.9 min

16.1 max

20.3 min

HS 36/22

H_43622UG

35.61 ± 0.51 10.85 ± 0.12 21.7 ± 0.25 23.85 nom

7.29 min

14.58 min

29.85 min

16.1 max

20.3 min

5.56 ± 0.1

RS 36/22

S_43622UG

35.61 ± 0.51 10.9 ± 0.07 21.8 ± 0.15 23.85 nom

7.4 ± 0.1

14.8 ± 0.2

29.9 min

16.1 max

20.3 min

DS 42/29

D_44229UG

42.4 ± 0.71 14.8 ± 0.2

29.6 ± 0.4

28.4 nom

10.21 min

20.42 min

35.61 min

17.7 max

25.0 min

RS 42/29

S_44229UG

42.4 ± 0.71 14.8 ± 0.2

29.6 ± 0.4

28.4 nom

10.21 min

20.42 min

35.61 min

17.7 max

25.0 min

5.56 ± 0.1

Refer to page 62 for additional hardware information.

Magnetics-2021-Ferrite-Catalog-html.html
background image

MAGNETICS

58

NOMINAL A

L

 (mH/1000T)

TYPE/SIZE

ORDERING CODE

L

R

P

F

T

PQ 20/16

0_42016UG

1,650

3,587

3,907

4,690

4,080

PQ 20/20

0_42020UG

1,300

2,947

3,213

3,860

3,580

PQ 26/10

0_42610UG

3,900

7,733

8,413

8,080

PQ 26/14

0_42614UG

2,700

5,613

 6,113

7,335

PQ 26/20

0_42620UG

2,640

5,560

6,053

7,270

7,020

PQ 26/25

0_42625UG

2,200

4,600

5,000

6,010

6,010

PQ 32/12

0_43214UG

6,867

7,467

8,960

PQ 32/20

0_43220UG

6,640

7,213

8,875

7,560

PQ 32/30

0_43230UG

4,667

5,080

6,100

6,570

PQ 35/35

0_43535UG

4,813

5,240

7,347

6,000

PQ 40/40

0_44040UG

4,267

4,640

5,580

6,100

PQ 50/50

0_45050UG

7,400

8,195

9,639

9,200

PQ Cores

PQ cores are designed specifically for switched mode power supplies. One result is an optimized 

ratio of volume to winding area and surface area, meaning that maximum inductance and 

winding area are possible with a minimum core size. The cores provide maximum power output 

with minimum assembled transformer weight and volume, in addition to taking up a minimum 

amount of area on the printed circuit board.
Assembly with printed circuit bobbins and one piece clamps is simplified. PQs provide a more 

uniform cross-sectional area, so they tend to operate with less pronounced hot spots than most 

other cores.
Typical applications include power transformers and power inductors.

HOW TO ORDER

PQ cores are sold in sets. 

For clip slot dimensions see individual data sheets.

See page 19 for information on gapped cores.

O R 4 20 16 UG

Shape code 
Ferrite core material
Used for all ferrite types
Approximate length in mm
Approximate height (per set) in mm
Geometry code

Magnetics-2021-Ferrite-Catalog-html.html
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59

DIMENSIONS (mm)

TYPE/SIZE

ORDERING CODE

A

B

2B

C

D

2D

E

F

G

PQ 20/16

0_42016UG

21.3 ± 0.4

8.1 ± 0.1

16.2 ± 0.2

14.0 ± 0.4 5.15 ± 0.15 10.3 ± 0.3

18.0 ± 0.4 

8.8 ± 0.2

12.0 min 

PQ 20/20

0_42020UG

21.3 ± 0.4  10.1 ± 0.1

20.2 ± 0.2

14.0 ± 0.4 7.15 ± 0.15 14.3 ± 0.3

18.0 ± 0.4

 8.8 ± 0.2

12.0 min 

PQ 26/10 

0_42610UG

27.2 ± 0.45

5.1 ± 0.1

10.2 ± 0.2  19.0 ± 0.45

1.2 min

 2.39 min

22.05 min

12.2 max

15.5 min

 PQ 26/14 

0_42614UG

27.2 ± 0.45 5.94 ± 0.1

11.9 ± 0.2 19.0 ± 0.45

3.4 min

6.7 min

22.05 min

12.2 max

15.5 min

 PQ 26/20

0_42620UG

27.3 ± 0.46 10.1 ± 0.13 20.2 ± 0.25 19.0 ± 0.45 5.75 ± 0.15 11.5 ± 0.3 22.5 ± 0.45 12.0 ± 0.2

15.5 min 

PQ 26/25

0_42625UG

27.3 ± 0.46 12.35 ± 0.13 24.7 ± 0.25 19.0 ± 0.45 8.05 ± 0.15 16.1 ± 0.3 22.5 ± 0.46 12.0 ± 0.2

15.5 min 

PQ 32/12

0_43214UG

33.0 ± 0.5

5.94 ± 0.1

11.9 ± 0.2

22.0 ± 0.5

3.4 min

6.7 min

27.0 min

13.75 max

19.0 min

 PQ 32/20

0_43220UG

33.0 ± 0.5 10.3 ± 0.13 20.6 ± 0.25 22.0 ± 0.5 5.75 ± 0.15 11.5 ± 0.3

27.5 ± 0.5 13.5 ± 0.25

19.0 min

 PQ 32/30

0_43230UG

33.0 ± 0.5 15.15 ± 0.13 30.3 ± 0.25 22.0 ± 0.5 10.65 ± 0.15 21.3 ± 0.3

27.5 ± 0.5 13.5 ± 0.25

19.0 min 

PQ 35/35

0_43535UG

36.1 ± 0.6 17.35 ± 0.13 34.7 ± 0.25 26.0 ± 0.5 12.5 ± 0.15 25.0 ± 0.3

32.0 ± 0.5 14.4 ± 0.25

23.5 min 

PQ 40/40

0_44040UG

41.5 ± 0.9 19.9 ± 0.15 39.8 ± 0.3

28.0 ± 0.6 14.75 ± 0.2 29.5 ± 0.4

37.0 ± 0.6

14.9 ± 0.3

29.0 ± 1.0

PQ 50/50

0_45050UG

51.0 ± 0.7 25.0 ± 0.25 50.0 ± 0.5

32.0 ± 0.6 18.05 ± 0.3 36.1 ± 0.6

44.0 ± 0.7 20.0 ± 0.35

32.0 min

MAGNETIC DATA

HARDWARE

TYPE/SIZE

ORDERING CODE

I

(mm)

A

(mm

2

)

A

e

 min 

(mm

2

)

V

(mm

3

)

WaAc  

(cm

4

)

Weight 

(grams per set)

Bobbins

PQ 20/16

0_42016UG

37.6

61.9

59.1

2,330

0.17

13

PCB2016FC

PQ 20/20

0_42020UG

45.7

62.6

59.1

2,850

0.23

16

PCB2020FB

PQ 26/10

0_42610UG

29.4

105

93.8

3,090

0.07

17

PQ 26/14

0_42614UG

33.3

86.4

70.9

2,880

0.17

16

PQ 26/20

0_42620UG

45.0

121

109

5,470

0.40

31

PCB2620LB

PQ 26/25

0_42625UG

54.3

120

108

6,530

0.60

36

PCB2625LB

PQ 32/12

0_43214UG

34.4

109

92.0

3,750

0.29

21

PQ 32/20

0_43220UG

55.9

169

142

9,440

0.79

42

PCB3220B1

PQ 32/30

0_43230UG

74.7

167

142

12,500

1.66

57

PCB3230B1

PQ 35/35

0_43535UG

86.1

190

162

16,300

3.02

73

PCB3535LB

PQ 40/40

0_44040UG

102

201

175

20,500

4.84

97

PCB4040FA

PQ 50/50

0_45050UG

113

328

314

37,100

8.28

195

00B5050B1

Refer to page 62 for additional hardware information.

Magnetics-2021-Ferrite-Catalog-html.html
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MAGNETICS

60

RM Cores

RM cores are designed for wound assemblies with a square footprint for efficient use of PC 
board space. The wire openings allow space for multiple coil terminations and offer a balance 
between shielding and thermal performance.

Easy to assemble and adaptable to automation, completed units provide at least 40% savings 
in mounting area compared to a similar size pot core assembly. 

Typical applications include differential mode inductors, power inductors, filter inductors, 
telecom inductors and broadband transformers.

2D
2B

2D
2B

NOMINAL A

L

 (mH/1000T)

TYPE/SIZE

ORDERING CODE

L

R

P

F

T

J

W

C

V

RM 4 N

N_41110UG

560

1,125

1,191

1,333

1,752

3,518

RM 4

R_41110UG

920

1,000

1,200

1,973

3,000

RM 5 N

N_41510UG

900

1,720

1,867

2,100

4,133

6,000

RM 5

R_41510UG

1,720

1,867

2,100

4,133

6,000

800

1,960

RM 6R N

N_41812UG

1,230

2,387

2,600

3,080

2,830

6,707

8,600

RM 6R

R_41812UG

2,187

2,333

2,800

5,973

7,714

2,700

RM 6S N

N_41912UG

1,250

2,213

2,400

2,880

6,000

8,600

RM 6S 

R_41912UG

1,987

2,160

2,600

5,387

7,714

RM 7 N 

N_42013UG

1,450

3,058

3,244

3,675

5,001

9,571

RM 8 N 

N_42316UG

1,700

2,700

2,933

5,210

4,100

8,000

12,200

RM 8

R_42316UG

2,347

2,560

3,500

6,960

10,600

RM 10 N

N_42819UG

2,200

4,047

4,400

5,500

5,500

9,987

16,000

RM 10

R_42819UG

4.750

RM 12 N

N_43723UG

4,600

5,000

6,000

6,790

11,800

22,600

RM 14 N

N_44230UG

7,000

7,540

8,782

8,130

13,096

20,735

HOW TO ORDER

SHAPE CODE

N

 – 

RM core with solid center post 

R

 – 

RM core with center hole 

RM cores are sold in sets.  

See page 19 for information on gapped cores.

R P 4 15 10 UG

Shape code 
Ferrite core material
Used for all ferrite types
Approximate diameter in mm
Approximate height (per set) in mm
Geometry code

Magnetics-2021-Ferrite-Catalog-html.html
background image

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61

MAGNETIC DATA

HARDWARE

TYPE/SIZE

ORDERING CODE

I

(mm)

A

(mm

2

)

A

e

 min 

(mm

2

)

V

(mm

3

)

WaAc  

(cm

4

)

Weight 

(grams per set)

Bobbins

RM 4 N

N_41110UG

23.3

13.8

11.5

322

0.01

1.7

PCB11104B

RM 4

R_41110UG

20.6

10.8

7.9

222

0.01

1.5

PCB11104B

RM 5 N

N_41510UG

23.2

24.8

18.1

574

0.02

3.2

PCB1510B1

RM 5

R_41510UG

21.4

21.0

13.9

449

0.02

3.1

PCB1510B1

RM 6R N

N_41812UG

27.5

38.0

31.2

1,040

0.06

5.4

00C1812B1

RM 6R

R_41812UG

25.6

32.0

22.6

819

0.05

4.5

00C1812B1

RM 6S N

N_41912UG

29.2

37.0

31.2

1,090

0.06

5.5

RM 6S

R_41912UG

27.0

31.0

22.6

837

0.05

5.1

RM 7 N 

N_42013UG

30.0

44.1

39.6

1,325

0.17

7.5

RM 8 N 

N_42316UG

38.4

63.0

55.4

2,440

0.19

13

00C2316B1

RM 8

R_42316UG

35.5

52.0

36.9

1,850

0.16

11

00C2316B1

RM 10 N

N_42819UG

44.6

96.6

89.1

4,310

0.44

22

00C2819B1

RM 10

R_42819UG

41.7

83.2

65.3

3,470

0.41

18

00C2819B1

RM 12 N

N_43723UG

56.6

146

125

8,340

1.07

46

PCB3723M1

RM 14 N

N_44230UG

70.0

198

168

13,900

1.73

69

DIMENSIONS (mm)

TYPE/SIZE ORDERING CODE

A

B

2B

C

D

2D

E

F

G

H

J

RM 4 N

N_41110UG

11.0 + 0/-0.5 5.2 ± 0.05

10.4 ± 0.1 4.6 + 0/-0.2 3.5 + 0.2/-0 7.0 + 0.4/-0 7.95 + 0.4/-0 3.9 + 0/-0.2

5.8 min

9.8 + 0/-0.4

RM 4

R_41110UG

11.8 max

5.2 ± 0.05

10.4 ± 0.1

4.45 nom

3.61 ± 0.1

7.21 ± 0.2

8.15 ± 0.2

3.8 ± 0.1

5.79 ref

2.05 ± 0.05

9.6 ± 0.2

RM 5 N

N_41510UG

14.6 + 0/-0.6 5.2 ± 0.05

10.4 ± 0.1 6.8 + 0/-0.4 3.25 ± 0.1

6.5 ± 0.2 10.2 + 0.4/-0 4.9 + 0/-0.2

6.0 min

12.3 + 0/-0.5

RM 5

R_41510UG

14.9 max

5.2 ± 0.05

10.4 ± 0.1

6.6 nom

3.25 ± 0.1

6.5 ± 0.2

10.4 ± 0.2

4.8 ± 0.1

6.71 nom

2.05 ± 0.05 12.05 ± 0.25

RM 6R N

N_41812UG

17.9 + 0/-0.7 6.2 ± 0.05

12.4 ± 0.1 7.4 + 0/-0.4 4.0 + 0.2/-0 8.0 + 0.4/-0 12.4 + 0.5/-0 6.4 + 0/-0.2

5.85 nom

14.7 + 0/-0.6

RM 6R

R_41812UG

18.3 max

6.2 ± 0.05

12.4 ± 0.1

7.4 nom

4.1 ± 0.1

8.2 ± 0.2

12.65 ± 0.25 6.25 ± 0.15

5.85 nom

3.05 ± 0.05

14.4 ± 0.3

RM 6S N

N_41912UG

18.3 max

6.2 ± 0.05

12.4 ± 0.1

8.2 nom

4.1 ± 0.1

8.2 ± 0.2

12.65 ± 0.25 6.25 ± 0.15

9.0 nom

14.4 ± 0.3

RM 6S

R_41912UG

18.3 max

6.2 ± 0.05

12.4 ± 0.1

8.2 nom

4.1 ± 0.1

8.2 ± 0.2

12.65 ± 0.25 6.25 ± 0.15

9.0 nom

3.05 ± 0.05

14.4 ± 0.3

RM 7 N

N_42013UG

20.3 + 0/-0.8 6.7 ± 0.05

13.4 ± 0.1 7.25 + 0/-0.3 4.2 + 0.25/-0 8.4 + 0.5/-0 14.75 + 0.6/-0 7.25 + 0/-0.3

9.3 min

17.2 + 0/-0.7

RM 8 N

N_42316UG

23.2 + 0/-0.9 8.2 ± 0.05

16.4 ± 0.1 11.0 + 0/-0.5 5.5 ± 0.1

11.0 ± 0.2 17.0 + 0.6/-0 8.55 + 0/-0.3

9.5 min

19.7 + 0/-0.8

RM 8

R_42316UG

23.2 max

8.2 ± 0.05

16.4 ± 0.1

10.8 nom

5.53 ± 0.13 11.05 ± 0.25 17.5 ± 0.35

8.4 ± 0.15

11.7 nom

4.5 ± 0.1

19.3 ± 0.4

RM 10 N

N_42819UG

28.5 + 0/-1.3 9.3 ± 0.05

18.6 ± 0.1 13.5 + 0/-0.5 6.2 + 0.3/-0 12.4 + 0.6/-0 21.2 + 0.9/-0 10.9 + 0/-0.4

10.9 min

24.7 + 0/-1.1

RM 10

R_42819UG

28.5 + 0/-1.3 9.3 ± 0.05

18.6 ± 0.1 13.5 + 0/-0.5 6.2 + 0.3/-0 12.4 + 0.6/-0 21.2 + 0.9/-0 10.9 + 0/-0.4

10.9 min

5.4 + 0.2/-0 24.7 + 0/-1.1

RM 12 N

N_43723UG

37.4 + 0/-1.3 12.25 ± 0.05 24.5 ± 0.1 16.1 + 0/-0.5 8.4 + 0.3/-0 16.8 + 0.6/-0 24.9 + 1.1/-0 12.8 + 0/-0.4

12.9 min

29.8 + 0/-1.1

RM 14 N

N_44230UG

42.2 + 0/-1.4 15.05 ± 0.05 30.1 ± 0.1 19.0 + 0/-0.6 10.4 + 0.3/-0 20.8 + 0.6/-0 29.0 + 1.2/-0 15.0 + 0/-0.6 17.0 nom

34.8 + 0/-1.3

Refer to page 62 for additional hardware information.

Magnetics-2021-Ferrite-Catalog-html.html
background image

MAGNETICS

62

SIZE

TYPE P/N

0200

TC

SMC06018A
SMH05025A
SMH07058A

0301

TC

SMC06018A
SMH05025A
SMH07058A

0401

TC

SMC06018A
SMH05025A
SMH07058A

0402

TC

SMC06018A
SMH05025A
SMH07058A

0502

TC

SMC06018A
SMH05025A
SMH07058A

0503

TC

SMC06018A
SMH05025A
SMH07058A

0601

TC

SMC06018A
SMH07058A

0603

TC

SMC06018A
SMH07058A

0704

PC

00B070401
00B0704B1

0705

TC

SMH07058A

0707

EP

0AC070716
0BC070712
SMB07076A

0905

PC

00B090501

0906

ER

00C09061A
SMB09068A

1009

EFD

00C1009B1
PCB1009B1

1010

EP

00C10102A
PCB10108A
SMB10108A

1107

PC

00B1107B1
00B1107A2
00C1107B1

1110

RM

00C1110B1

1212

EFD

00C1212B1
PCB1212B1

1313

EP

0AC131316
0BC131314
PCB1313B1
SMB1313B1

1406

TC

TVB22066A
TVH22064A

1407

TC

TVB22066A
TVH22064A

SIZE

TYPE

P/N

1408

PC

00B140801

RS/DS 00B140802

00C140811
00W140815
PCB140821
PCB1408S1
PCB1408TA
PCB1408TB
PCB1408TE
TBA140800
TCA1408B1
TCA1408C3

1450

TC

TVB22066A
TVH22064A

1506

TC

TVB22066A
TVH22064A

1510

RM

00C1110B1
PCB1510B1
PCB15108A
TBP151000

1515

EFD

SMB1515TA
00C1515B1
PCB1515B1

1605

TC

TVB22066A
TVH22064A

1717

EP

00C17172A
PCB17178A

1805

P-EC

00C180520

1808

EC

00B180801
PCB1808B1

1809

TC

TVB22066A
TVH22064A

1811

PC

00B181101

RS/DS 00B181102

00B181103
00C181111
00W181118
PCB181111
PCB181112
PCB181121
PCB181122
TCA1811B1

1812

RM

00C1812B1
TBA181201
TCA1812C2

SIZE

TYPE

P/N

1912

RM

PCB181241
PCB181261
TBA181201
TCA1812C2

2016

PQ

00C201612
PCB2016FC

2019

EFD

00C2019B1
PCB2019B1

2020

PQ

00C202012
PCB2020FC

2106

TC

TVB22066A
TVB2908TA
TVH22064A
TVH25074A

2109

TC

TVB22066A
TVB2908TA
TVH22064A
TVH25074A

2120

EP

0AC212016
0BC212016
PCB2120VB

2206

TC

TVB22066A
TVB2908TA
TVH22064A
TVH25074A

2207

TC

TVB22066A
TVB2908TA
TVH22064A
TVH25074A

2212

TC

TVB22066A
TVB2908TA
TVH22064A
TVH25074A

2213

PC

00B221301
00B221302
00B221303
00C221314
00W221324
0PC221314
PCB221311
PCB221321
TCF2213B1

2216

P-EC

00C221620

2311

RS/DS PCB2311TA

2316

00C2316B1

2318

RS/DS PCB2318TA

SIZE

TYPE

P/N

2507

TC

TVB2908TA
TVH22064A
TVH25074A

2508

TC

TVB2908TA
TVH22064A
TVH25074A

2510

EC

00B251001
PCB2510V1
PCB2510V2

2515

EC-EC

00B251501

2520

EC

PCB2520TA

2523

EFD

00C2523B1
PCB2523B1

2616

PC

00B261601

RS/DS 00B261602

00B261603
00C261614
0PC261614
PCB261611
PCB261612
PCB261613
PCB261621
PCB261622
PCB2616TA
TBP669000
TCF2800B1

2620

PQ

00C262012
PCB2620LB

2625

PQ

00C262512
PCB2625LB

2819

00C2819B1

2823

PC

00B282301

2908

TC

TVB2908TA
TVB3610FA
TVH25074A

2915

TC

TVB2908TA
TVB3610FA
TVH25074A

2929

ETD

00C2929B1
PCB2929B1

3007

EC

PCB3007T1

3009

EC

PCB3009LA

3019

PC

00B301901

RS/DS 00B301902

00B301903
00C301917
PCB301911
PCB301921
PCB3019TA
TBP669000
TCF2800B1

3030

EFD

00C3030B1
PCB3030B1

SIZE

TYPE

P/N

3113

TC

TVB2908TA
TVB3610FA

3205

TC

TVB3610FA
TVH38134A

3208

P-EC

00C320802

3220

PQ

00C322017
PCB3220B1

3230

PQ

00C323017
PCB3230B1

3434

ETD

00C343416
PCB3434FB

3515

EC

00B351501
PCB3515M1
PCB3515M2

3517

EC

0AC351717
0CC351700
PCB351701
PCH351701

3521

EER

PCB3521LA

3535

PQ

00C353517
PCB3535LB

3610

TC

TVH38134A

3615

TC

TVB3610FA
TVH38134A

3622

PC

00B362201
00C362217
PCB362211
PCB3622L1
TBP669000
TCF2800B1
TCF4000B1

3723

RM

PCB3723M1

3806

TC

TVB3610FA
TVH38134A

3813

TC

TVB3610FA
TVH38134A
TVH49164A

3825

TC

TVB3610FA
TVH38134A
TVH49164A

3939

ETD

00C393916
PCB3939SB

4015

TC

TVH49164A

4020

EC-IC

00B402021
PCB4020N1

4022

EC

PCB4022N1

4040

PQ

00C404017
PCB4040FA

4119

EC

00B411901
0AC411919
0CC411900
PCB411901

SIZE

TYPE

P/N

4119

EC

PCH411901

4216

EER

PCB4216FA

4229

PC

00B422901

RS/DS 00B422902

00C422917
PCB4229L1
TBP669000
TCF2800B1
TCF4000B1

4317

EC

PCB4317M1
00B4317B1

4416

TC

TVH49164A

4444

ETD

00C444416
PCB444418

4715

TC

TVH49164A

4721

EC

PCB4721M1

4916

TC

TVH49164A

4920

TC

TVH49164A

4925

TC

TVH49164A

4932

TC

TVH49164A

4949

ETD

00C494916
PCB494920
PCB4949WA

5050

PQ

00B5050B1

5224

EC

0AC522423
0CC522400
PCB522401
PCH522401
00B5224B1

5454

ETD

00C5454B1
PCB5454B1

5528

EC

00B5528B1
PCB5528WC

5530

EC

PCB5530FA

5724

EC

00B5724B1
PCB5724M1

5810

EC-IC

00C581001
00C581002

5959

ETD

00C595916
PCB5959AA

6113

TC

TVH49164A
TVH61134A

6326

TC

TVH49164A
TVH61134A

6410

EC-IC

00C641001
00C641002

6527

EC

00B652701

7035

EC

00B703501
PCB703501
PCH703501

7228

EC

00B722801

8020

EC

00B8020B1

Hardware

Magnetics-2021-Ferrite-Catalog-html.html
background image

63

Power 

Design

CORE GEOMETRIES

POT CORES

Pot cores, when assembled, nearly surround the wound 
bobbin. This aids in shielding the coil from pickup of EMI 
from outside sources. The pot core dimensions follow 
IEC standards so that there is interchangeability between 
manufacturers. Both plain and printed circuit bobbins are 
available, as are mounting and assembly hardware.

ROUND SLAB, DOUBLE SLAB & RM CORES

Slab-sided solid center post cores resemble pot cores, 
but have a section cut off on either side of the skirt. 
The additional openings allow larger wires to be 
accommodated and assist in removing heat from the 
assembly. RM cores are also similar to pot cores, but are 
designed to minimize board space, providing at least a 
40% savings in mounting area. Printed circuit or plain 
bobbins are available. One-piece clamps permit simple 
assembly. Low profile is possible. The solid center post 
generates less core loss and minimizes heat buildup.
  

PQ CORES

PQ cores are designed specifically for switched mode 
power supplies. One result is an optimized ratio of volume 
to winding area and surface area, meaning that maximum 
inductance and winding area are possible with a minimum 
core size. The cores provide maximum power output with 
minimum assembled transformer weight and volume, in 
addition to taking up a minimum amount of area on the 
printed circuit board.
 
Assembly with printed circuit bobbins and one piece 
clamps is simplified. PQs provide a more uniform 
cross-sectional area, so they tend to operate with less 
pronounced hot spots than most other cores.

EC, ETD AND EER CORES

These shapes combine the benefits of E cores and pot 
cores. Like E cores, they have a wide opening on each 
side. This provides ample space for the large wires used 
for low output voltage switched mode power supplies. It 
also increases the flow of air which keeps the assembly 
cooler. The center leg is round, like that of the pot core. 
One of the advantages of the round center leg is that the 
winding has a shorter path length around it (11% shorter) 
than the wire around a square center leg with an equal 
area. This reduces the losses of the windings by 11% and 

enables the core to handle a higher output power. The 
round center leg eliminates the sharp bend in the wire 
that occurs with winding on a square center leg.

E, ER AND PLANAR E CORES

E cores offer the advantage of simple bobbin winding 
and ease of assembly. A wide variety of standard 
lamination-size, metric and DIN sizes are available. E 
cores are a low-cost choice in designs that do not require 
self-shielding. Planar cores are the best selection for 
low profile applications. Copper traces that are layered 
in the printed circuit board are the windings in most 
planar applications. This type of design provides superior 
thermal characteristics, economical assembly, low leakage 
inductance, and consistent performance.

EP CORES

EP cores are round center post cubical shapes which 
enclose the coil completely except for the printed circuit 
board terminals. The particular shape minimizes the effect 
of air gaps formed at mating surfaces in the magnetic 
path and provides a larger volume ratio to total space 
used. Shielding is excellent.

TOROIDS

Toroids are the least expensive ferrite shape. Available in a 
variety of sizes, outer diameters of 2.54 mm – 140 mm, 
toroids have good self-shielding properties. The fact that 
the core is a solid with no sections to assemble makes it a 
good choice if mechanical integrity is important in a high 
vibration environment. Toroid cores are available uncoated 
or with an epoxy, nylon or Parylene coating.

CORE MATERIALS

POWER

 

Magnetics R, P, F, T and L materials provide superior 
saturation, high temperature performance, low losses and 
product consistency.

T material

 is ideal for consistent performance over 

a wide temperature range. Applications for T include: 
Automotive, Electronic Lighting, Outdoor LCD Screens, 
Mobile Handheld Devices and AC adapters and chargers.

L material

 was formulated for high-frequency and 

high-temperature applications. L is designed for DC-DC 
converters, filters and power supplies that operate from 
0.5 – 3.0 Mhz. Curie temperature is high for a ferrite 
material at 280˚C.

R material

 is an economical, low-loss choice for a broad 

range of applications.

P material

 offers similar properties to R material, but is 

more readily available in some sizes.

F material

 is an established material with a relatively 

high permeability and 210˚C Curie temperature.

Power Supplies, DC-DC Converters, Handheld Devices, 
High Power Control (gate drive) and EMI Filters are just 
a few of the applications that are typical for Magnetics 
ferrite power materials.

FILTER

 

Magnetics high permeability materials are engineered for 
optimum frequency and impedance performance in signal, 
choke and filter applications.

J and W materials offer high impedance for broadband 
transformers and are suitable for low-level power 
transformers.

J material

 is a medium perm, general-purpose material.

J’s properties are well suited both for EMI/RFI filtering 
and broadband transformers.

W material

 has set the industry standard for high perm 

materials. In filter applications, W perm has 20-50% more 
impedance below 1 MHz than J perm.

M material

 is Magnetics’ highest permeability material  

at 15,000µ. Applications for M include: EMI/RFI 
suppression filters, common mode chokes, signal 
processing, and broadband transformers.

LINEAR FILTERS AND SENSORS

 

Magnetics 

C, E

 and 

V materials

 offer excellent 

properties for low-level signal applications. These materials 
set the standard for high quality factor, long-term stability 
and precise and adjustable inductance. Applications 
for these materials include high Q filters, wideband 
transformers, pulse transformers and RLC tuned circuits.

Ferrite is an ideal core material for transformers, inverters and inductors in the frequency 
range 20 kHz to 3 MHz, due to the combination of low core cost and low core losses. Ferrites 
may be used in the saturating mode for low power, low frequency operation (<50 watts 
and 10 kHz). Ferrite cores may also be used in flyback transformer designs, which offer low 
core cost, low circuit cost and high voltage capability. Powder cores (MPP, High Flux, Edge

®

Kool Mµ

®

, Kool Mµ

®

 MAX, Kool Mµ

®

 Hƒ, and XF

lux

®

) offer soft saturation, higher B

max

 , 

and superior temperature stability and are often the best choice for minimum size and robust 
performance in power choke, inductor, and flyback applications.

Magnetics-2021-Ferrite-Catalog-html.html
background image

MAGNETICS

64

Ferrite E cores and pot cores offer the advantages of decreased cost and low 
core losses at high frequencies. For switching regulators, power materials are 
recommended because of their temperature and DC bias characteristics. By 
adding air gaps to these ferrite shapes, the cores can be used efficiently while 
avoiding saturation.

These core selection procedures simplify the design of inductors for switching 
regulator applications. One can determine the smallest core size, assuming a 
winding factor of 50% and wire current carrying capacity of 500 circular mils per 
ampere.

Only two parameters of the design applications must be known: 
(a) Inductance required with DC bias 
(b) DC current

1. Compute the product of LI² where: 

L = inductance required with DC bias (millihenries) 
I = maximum DC output current + 1/2 AC Ripple

2. Locate the LI² value on the Ferrite Core Selector charts shown. Follow this 

coordinate up to the intersection with the first core size curve. Read the 
maximum nominal inductance, A

L

, on the Y-axis. This represents the smallest 

core size and maximum A

L

 at which saturation will be avoided.

3. Any core size line that intersects the LI² coordinate represents a workable core 

for the inductor if the core’s A

L

 value is less than the maximum value obtained 

on the chart.

4. Required inductance L, core size, and core nominal inductance (A

L

) are known. 

Calculate the number of turns using 

 

 
where L is in millihenries.

5. Example: If I

MAX

 = 8 Amps; L, inductance required = 100 µHenries 

LI² = (0.100 mH) X (8² Amps) = 6.4 millijoules

6. There are many ferrite cores available that will support the energy required. 

Any core size that the LI² coordinate intersects can be used at the A

value 

shown on the chart.

7. Some choices based upon an LI² value of 6.4 millijoules are:   

Pot core  43622  A

L

 = 400 

Double Slab 43622  A

L

 = 250 

PQ core  43220  A

L

 = 300 

E core         44317  A

L

 = 250

8. For the following A

L

 values the number of turns required is: 

A

L

 = 400, N = 16      A

L

 = 300, N = 19      A

L

 = 250, N = 20 

Make sure the wire size chosen will support the current and fit into the core set.

N    =   10

3

 

L

A

L

;''

POT CORES

LI

2

 (millijoules)

A

L

(m

H/

10

00

 tu

rns

)

900

500

700

1100

1300

300

100

0.01

1

100

0.1

10

B

C

D

E

F

G

H

J

K L

B - 40704

C - 40905

D - 41107

E - 41408

F - 41811

G - 42213

H - 42616

J - 43019

K - 43622

L - 44229

ETD AND EER CORES

LI

2

 (millijoules)

A

L

(m

H/

10

00

 tu

rns

)

E

G

H

I

F

900

500

700

1100

1300

300

100

1

100

0.1

10

B

A

C D

A - 42814

     42817 (EER28)

B - 43434 (ETD34)

C - 43521 (EER35L)

D - 43939 (ETD39)

E - 44013 (EER40)

F - 44216  (EER42)

     44444 (ETD44)

G - 44818

     44821 (EER48)

     45418 (EER54)

H - 44949 (ETD49)

I -  45959 (ETD59)

RS (ROUND-SLAB) & DS (DOUBLE-SLAB) CORES

LI

2

 (millijoules)

A

L

(m

H/

10

00

 tu

rns

)

900

500

700

1100

1300

300

100

0.01

1

100

0.1

10

A

C

B

D E

F

A - 41408 

    (RS)

B - 42311 

    (DS, RS)

    42318 

    (DS, RS)

C - 42616 

    (DS)

D - 43019 

    (DS, RS)

E - 43622 

    (DS)

F - 44229 

    (DS)

Inductor 

Design

Magnetics-2021-Ferrite-Catalog-html.html
background image

www.mag-inc.com

65

LAMINATION SIZE E CORES

LI

2

 (millijoules)

A

L

(m

H/

10

00

 tu

rns

)

800

400

600

1000

1200

200

0

0.01

1

100

0.1

10

A - 41203

B - 41707

C - 41808

D - 42510 

E - 43009

    43515

F - 44317

G - 44033

H - 44011

    44016

I -  44020

    44022

    44721

J - 45528

    45530

    47228

    48020

    45724

    46016

K - 46527

    47133

L - 49928

A

B

C

D

E

F G

H

I

J

K L

PLANAR EE AND EI CORES

LI

2

 (millijoules)

A

L

(m

H/

10

00

 tu

rns

)

800

400

600

1000

1200

200

0

0.01

1

100

1400

1600

1800

2000

0.1

10

A - 41425 (EE, EI)

    41434 (EE, EI)

B - 41805 (EE, EI)

C - 42107 (EE, EI)

D - 42216 (EE, EI)

E - 43208 (EE, EI)

    43616 (EE, EI)

F - 43808 (EE, EI)

G - 44008 (EE, EI)

H - 44308 (EE, EI)

    44310 (EE, EI)

I - 45810 (EE, EI)

J - 46410 (EE, EI)

K - 49938 (EE)

A

B

C

D

E

G

F

H

I J K

E CORES

LI

2

 (millijoules)

A

L

(m

H/

10

00

 tu

rns

)

800

400

600

1000

1200

200

0

0.01

0.1

10

1

A - 40904

B - 41205

C - 42513

    42515

D - 42520

    42530

E - 41810

F - 43007

G - 42526

H - 42530

    43520

A

C

D

E

F

G

H

B

ER, EFD, AND EC CORES

LI

2

 (millijoules)

A

L

(m

H/

10

00

 tu

rns

)

800

400

600

1000

2000

200

0

0.01

1

100

1200

1400

1600

1800

0.1

10

A - 41009 (EFD)

B - 40906 (ER)

    41126 (ER)

    41212 (EFD)

C - 41308

    41426 (ER)

D - 41515 (EFD)

E - 41826 (ER)

F - 42517

    42521 (ER)

G - 42313 (ER)

    42523 (EFD)

H - 43021 (ER)

    44119 (EC)

I - 42014 (ER)

    43030 (EFD)

J - 43225 (ER)

K - 43517 (EC)

L - 45224 (EC)

M - 47035 (EC)

A

B

C

D

E

F

G

H

I

J

K

L

M

RM AND EP CORES

LI

2

 (millijoules)

A

L

(m

H/

10

00

 tu

rns

)

800

400

600

1000

1200

200

0

0.1

10

0.01

1

A

G

F

H

J

A - 40707 (EP7)

    41010 (EP10)

    41110 (RM4)

B - 41313 (EP13)

C - 41510 (RM5)

D - 41717 (EP17)

E - 41812 (RM6)

F - 42316 (RM8)

G - 42120 (EP20)

H - 42819 (RM10)

J - R43723 (RM12)

E

D

C

B

PQ CORES

LI

2

 (millijoules)

A

L

(m

H/

10

00

 tu

rns

)

900

500

700

1100

1300

300

100

0.01

1

100

0.1

10

A - 42016

    42020

B - 42614

C - 42610

    42620

    42625

    43214

D - 43220

    43230

E - 43535

    44040

F - 45050

E

F

D

C

B

A

Inductor 

Design

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MAGNETICS

66

Inductor

Design

DC BIAS DATA — FOR GAPPED APPLICATIONS

The above curves are limit curves, up to which 

effective permeability

 remains 

constant. They show the maximum allowable DC bias, in ampere-turns, 

without a reduction in inductance. Beyond this level (see insert), inductance 

drops rapidly.
Example: How many ampere-turns can be supported by an R42213A315 

pot core without a reduction in inductance value?

 

l

e

 = 3.12 cm    µ

e

 = 125

Maximum allowable H = 25 Oersted (from the graph above)

NI (maximum) = 0.80  x  H  x  

l

e

  = 62.4 ampere-turns

or (Using top scale, maximum allowable H = 20 A

T/cm.)

NI (maximum) = A

T/cm  x 

 

 

l

e

 

= 20  x  3.12

 

= 62.4 A

T

µ

e

  

A

L

 

  

l

e

 4 

p

 A

e

1            1          

l

g

 

µ

e

           µ

i

         

l

e

A

e

 = effective cross sectional area (cm

2

)

A

L

 = inductance/1,000 turns (mH)

µ

i

 = initial permeability

l

g

 = gap length (cm)

___ =___+___

 =________

NI = 0.80  x  H  x 

 l

e

Where

NI = maximum allowable ampere-turns

H = DC Bias level

 l

e

 = core path length (cm)

Inductance falls off rapidly above the limit 

curve. The dashed lines illustrate the µ

e

 curve 

for individual gapped core sets.

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67

Magnetics offers two methods to select a ferrite core for a power application. 

CORE SELECTION BY POWER HANDLING CAPACITY

The Power Chart characterizes the power handling capacity of each ferrite core 
based upon the frequency of operation, the circuit topology, the flux level selected, 
and the amount of power required by the circuit. If these four specifics are known, 
the core can be selected from the Power Chart on page 68. 

CORE SELECTION BY WaAc PRODUCT

The power handling capacity of a transformer core can also be determined by its 
WaAc product, where Wa is the available core window area, and Ac is the effective 
core cross-sectional area. Using the equation shown below, calculate the WaAc 
product and then use the Area Product Distribution (WaAc) Chart to select the 
appropriate core. 

WaAc = Product of window area and core area (cm

4

P

o

 = Power Out (watts) 

D

cma

 = Current Density (cir. mils/amp) Current density can be selected depending 

upon the amount of heat rise allowed. 750 cir. mils/amp is conservative; 500 
cir. mils is aggressive. 

B

max

 = Flux Density (gauss) selected based upon frequency of operation. Above 20 

kHz, core losses increase. To operate ferrite cores at higher frequencies, it is 
necessary to operate the core flux levels lower than ± 2 kG. The Flux Density 
vs. Frequency chart shows the reduction in flux levels required to maintain 100 
mW/cm³ core losses at various frequencies, with a maximum temperature rise 
of 25°C for a typical power material, Magnetics P material. 

A

c

 = Core area in cm

V = Voltage

ƒ = frequency (hertz)  

l

p

 = Primary current

K

t

 = Topology constant  

l

s

 = Secondary current 

      (for a space factor of 0.4) 

N

p

 = Number of turns on the primary

 

N

S

 = Number of turns on the secondary

TOPOLOGY CONSTANTS K

t  

Forward converter = 0.0005 

Push-Pull = 0.001 

Half-bridge = 0.0014 

Full-bridge = 0.0014 

Flyback = 0.00033 (single winding) 

Flyback = 0.00025 (multiple winding)

For individual cores, WaAc is listed in this catalog under “Magnetic Data.” 

The WaAc formula was obtained from derivations in Chapter 7 of A. I. Pressman’s 
book, “Switching Power Supply Design. Choice of B

max

 at various frequencies, D

cma

 and 

alternative transformer temperature rise calculations are also discussed in Chapter 7 of 
the Pressman book.

WaAc    = 

P

o

D

cma

K

t

B

max ƒ

FREQUENCY kHz

1000

1500

2000

500

0

10

100

1000

60

30

600

300

FLUX DENSITY VS. FREQUENCY P MATERIAL

Transformer

Design

Once a core is chosen, the calculation of primary and secondary turns and wire 
size is readily accomplished.

KWa = N

p

A

wp

 + N

s

A

ws    

 

Where

 

A

wp

 = primary wire area  

A

ws

 = secondary wire area 

Assume K = .4 for toroids; .6 for pot cores and E-U-I cores 
Assume N

p

A

wp

 = 1.1 N

s

A

ws

 to allow for losses and feedback winding

efficiency e   = 

Voltage Regulation (%)  = 

x 100 

P

out

P

out 

wire losses

 + 

core losses

V

no load

  

-  V

full load

 

V

full load

 

N

p

   = 

V

p X 

10

8

4BA

c ƒ

I

p

   = 

P

in

V

in

N

s

  = 

N

p

V

s

V

p

I

s

  = 

P

out

V

out

P

out

P

in

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MAGNETICS

68

Typical Power Handling Chart

Power in Watts 

20 kHz        50 kHz       100 kHz       250 kHz

Pot, RS,  

DS

E Cores

RM, PQ, 

EP

UU, UI,  

UR

ETD, 

 EER, EC

EFD, Planar

Toroid

2

3

4

7

41811 RS DS PC

41205 EE   
41707 EE

41313 EP  

41812 RM  
41912 RM

42107 EE    
41805 EE

40907 TC  41406 TC  41303 TC  
41435 TC  41304 TC  41206 TC  
41506 TC  41407 TC  41405 TC  

41305 TC

5

8

11

21

41814 PC       

42311 RS DS HS

41808 EE

41717 EP   

42013 RM   

42016 PQ   
42610 PQ

42019 EFD  

42216 EI
42214 EI   
43208 EI

41306 TC    41607 TC   
41450 TC    41410 TC   
41605 TC    41610 TC

41606 TC

12

18

27

52

41810 EE  
42510 EE

42316 RM

13

20

29

56

42213 PC

42614 PQ

15

22

32

62

42318 RS DS HS

42214 EE

18

28

40

78

42020 PQ

42523 EFD

19

30

42

83

42616 RS DS HS

42513 EE   

42515 EI

42120 EP   

43214 PQ

42515 UI

42216 EE   

43618 EI

42217 EE  

44008 EI

42106 TC   
41809 TC

26

42

58

113

43208 EE 

42206 TC

28

45

63

122

42520 EE

43030 EFD

30

49

67

131

42616 RS PC

42620 PQ

42109 TC

33

53

74

144

42515 EE

42819 RM

42207 TC

40

61

90

175

42526 EE  
43007 EE

42506 TC

42

70

94

183

43019 HS

42625 PQ

43618 EE

48

75

108

210

42823 PC      

 43019 RS DS PC

43009 EE

42512 UU   
42515 UU

42929 ETD

44008 EE

42507 TC

60

97

135

262

42530 EE  
43515 EE

43220 PQ

 43517 EC

43808 EI

42212 TC

70

110

157

306

43622 DS HS

43723 RM

42220 UU   
42530 UU

42814 EER   
42817 EER   
43434 ETD

42508 TC   
42908 TC   
42712 TC

105

160

235

460

43622 RS

44011 EE  
44317 EE

44308 EI  
44310 EI

120

195

270

525

43622 PC

43230 PQ

43808 EE

43806 TC

130

205

290

570

43520 EE

44230 RM

44119 EC

43809 EE

150

240

337

656

44016 EE   

44020 EI

43521 EER   
43939 ETD

44308 EE

43113 TC   
42915 TC

200

310

450

875

44310 EE

43610 TC

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69

Typical Power Handling Chart

Ferrite Core selection listed by typical Power Handling Capabilities (Chart is for Power Ferrite Materials, F, P, R, L and T, Push-Pull Square wave operation)

Wattage values shown above are for push-pull converter design. De-rate by a factor of 3 or 4 for flyback. De-rate by a factor of 2 for feed-forward converter.
Example:  For a feed-forward converter to be used at 300 watts select a core that is rated at 600 watts based on the converter topology.

Note: Assuming core loss to be approximately 100 mW/cm³, B Levels used in this chart are:
@ 20 kHz - 200 mT, 2000 gauss;    @ 50 kHz - 130 mT, 1300 gauss;    @ 100 kHz - 90 mT,   900 gauss;    @ 250 kHz - 70 mT, 700 gauss 

Power in Watts 

20 kHz        50 kHz       100 kHz       250 kHz

Pot, RS,  

DS

E Cores

RM, PQ, 

EP

UU, UI,  

UR

ETD, 

 EER, EC

EFD, Planar

Toroid

220

350

495

962

44721 EE

44119 UR

230

350

550

1073

44229 RS DS

43535 PQ

44121 UR

44013 EER

260

400

585

1137

43813 TC

280

430

630

1225

44229  PC

44020 EE

44216 EER

 

300

450

675

1312

44444 ETD   
44818 EER   

45224 EC

45810 EI

43615TC

340

550

765

1487

44033 EE

44125 UR

360

580

810

1575

44022 EE

44040 PQ

45418 EER

43620 TC

410

650

922

1793

44033 EE   
45724 EE

44130 UR

44821 EER  
44949 ETD

46410 EI

44416 TC 44419 TC 43825 TC

550

800

1237

2406

46016 EE

 

44015 TC   44715 TC

650

1000

1462

2843

45050 PQ

45810 EE

700

1100

1575

3062

45528 EE

45716 UR

45454 ETD

46410 EE

44920 TC   44916 TC 

900

1500

2000

3900

45530 EE

44925 TC

1000

1600

2250

4375

43428 UG

47228 EE
46022 EE

45917 UR

45959 ETD   

47035 EC

 

46013 TC  
46113 TC

1600

2600

3700

7215

46420 UR

 

44932 TC   46019 TC

2000

3000

4500

8750

46527 EE  
47133 EE  
48020 EE

46325 TC  
46326 TC  
47313 TC

2800

4200

6500

12675

49316 UI   

49316 UU

49938 EE

48613 TC    48626 TC 
47325 TC    49715 TC 
48619 TC    49718 TC 

48625 TC   

11700

19000

26500

51500

49928 EE

49330 UU  
49332 UU  
49920 UU  

49925 UI  

49925 UU

49725 TC   
49740 TC

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MAGNETICS

70

WaAc (cm

4

) RS, DS, HS

E

EC, EER, 

EFD, ETD

EP, RM

ER

Planar

Pot

PQ

TC

U, UR

<0.001

40200 TC
40301 TC
40502 TC

0.001

   

40401 TC
40402 TC
40503 TC
40601 TC

0.002

40904 EE

40704 UG

0.003

40906 EE

40905 UG

40603 TC

0.004

41009 EFD

41126 EE

0.005

40707 EP

0.006

41308 EI

41107 UG

0.008

41434 EI

40705 TC

0.01

41212 EFD

41010 EP

41110 RM

41308 EE
41426 EE

41425 EE

41109 UG

41003 TC

41106 UI

0.02

41408 RS DS HS

41203 EE

41515 EFD

41510 RM

41434 EE

41408 UG

41005 TC

41106 UU

0.03

41205 EE
41707 EE

41313 EP

41826 EE

42107 EI 
41805 EI

40907 TC

0.04

41805 EI

41303 TC
41435 TC

0.05

41811 HS

41812 RM

42313 EE

41206 TC   41304 TC
41405 TC   41407 TC  

41506 TC

0.06

41717 EP

41912 RM

42107 EE

41410 UG

41305 TC

0.07

41811 RS DS

42014 EI

42107 EE
41805 EE

41811 UG

42610 UG

41306 TC
41406 TC

0.08

42311 DS HS

41808EE

42517EI

41450TC

0.09

42019 EFD

41814 UG

0.1

42311 RS

41810 EE

42014 EE

42216 EI

41605 TC

0.2

42318 RS DS HS

42510 EE

42515 EI

42523 EFD

42013 RM

42120 EP

42316 RM

42517 EE

43021 EI

42214 EI

42213 UG

42016 UG  
42020 UG
42614 UG

41606 TC  41607 TC

41410 TC   41610 TC

0.3

42616 RS DS HS

42513 EE

43030 EFD

42521 EE
43225 EE

43618 EI  

42216 EE
42214 EE

43214 UG

41809 TC
42106 TC

42515 UI

0.4

42526 EE

42819 RM

42217 EE  

43208 EI 
44008 EI

42616 UG

42620 UG

42109 TC
42206 TC

0.5

42520 EE
43007 EE

42814 EER

43021 EE

42207 TC

0.6

43019 DS HS

42515 EE
43009 EE

43618 EE

42823 UG

42625 UG

42220 UU
42515 UU

0.7

43019 RS

42530 EE

42929 EFD
42817 EER

43208 EE

43019 UG

42507 TC

0.8

43517 EC

44008 EE

43220 UG

42506 TC
42212 TC

42512 UU

0.9

43808 EI

42508 TC

Area Product Distribution (WaAc) Chart

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71

WaAc (cm

4

) RS, DS, HS

E

EC, EER, 

EFD, ETD

EP, RM

ER

Planar

Pot

PQ

TC

U, UR

<1

43622 RS DS HS

43515 EE
44011 EE

44020 EI

43434 ETD

43723 RM

44308 EI

42712 TC
42908 TC

42530 UU

2

44016 EE
44317 EE
43520 EE

43521 EER
43939 ETD
44013 EER

44119 EC

44230 RM

44310 EI 

43808 EE

43622 UG

43230 UG

42915 TC
43113 TC
43806 TC

3

44229 RS DS

44721 EE

44216 EER
44818 EER

43809 EE
44308 EE

43535 UG

43610 TC
43813 TC

44119 UR
44121 UR

4

44020 EE
44022 EE

44444 ETD
44821 EER

45224 EC

45418 EER

44310 EE

44229 UG

43615 TC

44125 UR

5

45810 EI

44040 UG

43620 TC 
44416 TC

44130 UR

6

44033 EE
46016 EE

44949 ETD

46410 EI

44419 TC

7

45724 EE

43825 TC
44015 TC

8

45810 EE

45050 UG

44715 TC

9

45454 ETD

44920 TC

45716 UR

10

45528 EE

11

46410 EE

44916 TC

12

45530 EE

13

47035 EC

44925 TC

14

45959 ETD

45917 UR

15

47228 EE

16

46013 TC 
46113 TC

21

46022 EE

44932 TC

22

46420 UU

23

47133 EE

43428 UG

24

46527 EE

25

46019 TC
47313 TC

34

48020 EE

46325 TC
46326 TC

46

48613 TC

49316 UI

51

49938 EE

47325 TC

61

49925 UI

70

48619 TC

91

49928 EE

48625 TC
48626 TC
49715 TC

49316 UU

106

49718 TC

121

49925 UU

171

49725 TC

286

49920 UU

372

49740 TC

Area Product Distribution (WaAc) Chart

Magnetics-2021-Ferrite-Catalog-html.html
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MAGNETICS

72

Other Products 

from Magnetics

POWDER CORES

Powder cores are excellent as low loss inductors for switched-mode power supplies, switch-
ing regulators and noise filters. Most core types can be shipped immediately from stock.

Magnetics 

Kool Mμ

®

 powder cores exhibit low losses at elevated frequencies. Kool Mµ 

is available in 7 permeabilities and a variety of core types for maximum flexibility. Toroids 
offer compact size and self-shielding. E cores, U cores, EQ cores, and LP cores afford lower 
cost of winding, use of foil windings or helical windings, and ease of fixturing. For very high 
current applications, very large cores and structures are available including toroids up to 165 
mm, large E cores, U cores, stacked shapes, and blocks.

Magnetics 

Kool Mμ

®

 MAX

 powder cores offer 50% better DC bias performance than 

standard Kool Mµ material. Available in 7 permeabilities from 14µ to 90µ including toroids, 
blocks, U cores and E cores.

Magnetics 

Kool Mμ

®

 Hƒ

 powder cores are the best option for achieving superior efficien-

cy in medium and high current power inductors and are available in 26µ, 40µ and 60µ.

Magnetics 

XF

lux

®

 powder cores are made from 6.5% silicon iron powder for very high 

saturation flux density, comparable with High Flux. XFlux is available in 7 permeabilities 
from 19µ to 125µ and multiple shapes including toroids, E cores, block cores, EQ cores, LP 
cores, and EER cores.

Magnetics 

High Flux

 powder cores exhibit very high resistance to saturation at high cur-

rent. High Flux is available in 7 permeabilities from 14µ to 160µ and over 30 sizes. Shapes 
include toroids, EQ cores, LP cores, and EER cores.

Magnetics 

Edge

®

 powder cores are the best option for achieving smallest package size in 

high frequency, current-limited power inductors and are available in 5 permeabilities from 
19µ to 125µ.

Magnetics 

Molypermalloy (MPP)

  powder cores have extremely low core losses, 

highest Q, and best temperature stability compared with other materials. Standard cores 
include either temperature stabilized (guaranteed flat as wide as -65°C to 125°C for stable 
operation) or standard stabilization. MPP toroidal cores are available in 10 permeabilities 
from 14µ to 550µ and sizes identical to High Flux.

TAPE WOUND CORES

Strip wound cores are made from high permeability magnetic strip alloys of nickel-iron (80% or 
50% nickel), and silicon-iron. The alloys are known as Orthonol

®

, Permalloy 80, 48 Alloy and 

Magnesil

®

. Tape Wound Cores are produced as small as 0.438” OD in hundreds of sizes. For a 

wide range of frequency applications, materials are produced in thicknesses from ½ mil (0.013 
mm) through 4 mils (0.102 mm). Cases are robust nylon and aluminum boxes, rated for 200°C 
continuous operation and 2,000 minimum voltage breakdown.

Tape wound cores are useful for both power and signal circuits in harsh environmental conditions 
where robust component operation is essential to achieve high reliability.

BOBBIN CORES

 

Bobbin cores are miniature tape cores made from ultrathin (0.000125” to 0.001” thick) strip 
material wound on nonmagnetic stainless steel bobbins. Bobbin cores are generally manufac-
tured from Permalloy 80 and Orthonol

®

. Covered with protective caps and then epoxy coated, 

bobbin cores can be made as small as 0.05” ID and with strip widths down to 0.032”. Bobbin 
cores can switch from positive to negative saturation in a few microseconds or less, with very 
high peak impedance (relative permeability) while not saturated, making them ideal for analog 
logic elements, magnetometers, and pulse transformers.

Bobbin cores are also useful for analog counters, timers, magnetic sensors, and other analog 
circuits in harsh environmental conditions where robust and reliable operation is essential.

NANOCRYSTALLINE CORES

Nanocrystalline cores are made from amorphous metal which is annealed to create a uniform 
nanocrystalline microstructure. Sizes include toroids and split cores from 5 mm to 145 mm, and 
durable cases are available in polyester (<130°C) and rynite polyester (<155°C). Nanocrys-
talline cores are a choice solution for applications such as common mode chokes and current 
transformers as they exhibit high permeability, low power loss, and high saturation. 

AMORPHOUS CORES

Amorphous cores are made from metallic glass materials with an amorphous atomic structure, 
which creates higher resistivity than nanocrystalline cores. Amorphous cores offer excellent fre-
quency response and efficiency, and they are a choice solution for high frequency, low loss 
applications. Magnetics offers amorphous cut cores (C shape) from 51 mm to 131 mm, with 
toroids and split cores available upon request.

Magnetics-2021-Ferrite-Catalog-html.html
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 Design Equations

 Area Product Distribution (WaAc)  

and Power Charts

 Product Datasheets

 Product Catalogs

 Design Software

 Distributor Stock Check

 Part Number Search

 Cross Reference Tool

For updates and more in-depth product 

information, visit mag-inc.com

Website