P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

Table of Contents

1

Click here for Part Number Index and locator

 ........

Introduction ..................................................................................................................................................................................... 2
Magnetic Properties of Fair-Rite Materials ................................................................................................................................... 4
Fair-Rite Materials ......................................................................................................................................................................... 6

Board Components

EMI Suppression Beads ................................................................................................................................................ 24
Beads on Leads ............................................................................................................................................................. 29
SM Beads ....................................................................................................................................................................... 41
Chip Beads .................................................................................................................................................................... 50
PC Beads ....................................................................................................................................................................... 74
Wound Beads ................................................................................................................................................................ 78
Multi-Aperture Cores ..................................................................................................................................................... 84

Engineering Kits ....................................................................................................................................................

 92

Cable Components

Round Cable EMI Suppression Cores ......................................................................................................................... 94
Split Round Cable EMI Suppression Cores ................................................................................................................. 98
Round Cable Snap-its ................................................................................................................................................. 102
Flat Cable EMI Suppression Cores ............................................................................................................................ 108
Flat Cable Snap-its ...................................................................................................................................................... 116
Miscellaneous Suppression Cores ............................................................................................................................. 118
Connector Suppression Plates ................................................................................................................................... 120
Tiles .............................................................................................................................................................................. 125

Inductive Components

Open Magnetic Circuit

Rods .............................................................................................................................................................. 129
RFID .............................................................................................................................................................. 132
Tack Bobbin Cores ....................................................................................................................................... 133
Bobbins ......................................................................................................................................................... 134

Closed Magnetic Circuit

Toroids .......................................................................................................................................................... 136
Pot Cores ...................................................................................................................................................... 142
E & I Cores .................................................................................................................................................... 146
ETD Cores ..................................................................................................................................................... 150
U Cores ......................................................................................................................................................... 152
PQ Cores ....................................................................................................................................................... 154
EP Cores ....................................................................................................................................................... 156
85 Material Toroids ....................................................................................................................................... 158

References

Reference Tables ........................................................................................................................................................ 159
Soft Ferrite References ................................................................................................................................................ 160
Glossary of Terms ........................................................................................................................................................ 162
Magnetic Design Formulas ......................................................................................................................................... 163
Wire Table of Copper Magnet Wire ............................................................................................................................ 164

Technical Articles

The Effect of Direct Current on the Inductance of a Ferrite Core ............................................................................... 165
Use of Ferrites in Broadband Transformers ............................................................................................................... 170
How to Choose Ferrite Components for EMI Suppression ........................................................................................ 174
Ferrite Tile Absorbers for EMC Test Chamber Applications ...................................................................................... 183

Numerical Index ....................................................................................................................................................................... 186

Copyright 

©

 2001 by Fair-Rite Products Corp.

All rights reserved. No part of the contents of this book may be published or transmitted in any form or by any means
without the expressed written permission of the publisher.

To search for a part number use "CTRL F" 
or click on binocular icon above.

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

Introduction

2

History

The history of magnetism began with the discovery of the prop-
erties of a mineral called magnetite (Fe

3

O

4

). The most plentiful

deposits were found in the district of Magnesia in Asia Minor
(hence the mineral’s name) where it was observed, centuries
before the birth of Christ, that these naturally occurring stones
would attract iron. Later on it found application in the lodestone
of early navigators. In 1600 William Gilbert published 

De Magnete,

the first scientific study on magnetism. In 1819 Hans Christian
Oersted observed that an electric current in a wire affected a
magnetic compass needle, thus with later contributions by Fara-
day, Maxwell, Hertz and others, the new science of electromag-
netism came into being.

Even though the existence of naturally occurring magnetite, a
weak type of hard ferrite, had been known since antiquity,
producing an analogous soft magnetic material in the laboratory
proved elusive. Research on magnetic oxides was going on
concurrently during the 1930’s, primarily in Japan and the
Netherlands. However, it was not until 1945 that J. L. Snoek of
the Philips’ Research Laboratories in the Netherlands suc-
ceeded in producing a soft ferrite

*

 material for commercial

applications.

Fair-Rite Products Corp. was not far behind in the manufacture
and sale of soft ferrites for use in the electronics industry. It was
formed in 1952 and officially started operations in 1953. The
ensuing years have seen a rather crude product, which was
available in only a few shapes and materials, develop into a
major line of ferrite components for inductive devices, produced
in many core configurations with a wide selection of materials.
The application of ferrites in EMI suppression as shield beads
and broadband chokes, where an effective resistive impedance
is produced at high frequencies, has grown so fast in the last
decade, that their use as EMI suppressors is limited only by the
imagination of the end user.

Soft Ferrites

The single most important characteristic of soft ferrites, as com-
pared to other magnetic materials, is the high volume resistivity
exhibited in the monolithic form. Since eddy current losses are
inversely proportional to resistivity and these losses increase
with the square of the frequency, high resistivity becomes an
essential factor in magnetic materials intended for high fre-
quency operation. The magnetic properties of ferrite components
are isotropic, and by employing various pressing, injection
molding, and/or grinding techniques, a wide range of complex
shapes can be formed.  There is no other class of magnetic
material that can match soft ferrites in performance, cost and
volumetric efficiency, over the range from audio frequencies to
above 500 MHz.

*Footnote:

The difference between hard and soft ferrite is not tactile, but rather a magnetic characteristic.
Soft ferrite does not retain significant magnetization, whereas hard ferrite magnetization is considered permanent.

During the last 50 years the basic constituents of ferrites have
changed little, but purity of raw materials and process control
have improved dramatically. Ferrites are ceramic materials with
the general chemical formula MO.Fe

2

O

3

, where MO is one or

more divalent metal oxides blended with 48 to 60 mole percent
of iron oxide. Fair-Rite manufactures three broad groups of soft
ferrite materials:

Manganese zinc (Fair-Rite 31, 33, 73, 75, 76, 77 and 78 material)

Nickel zinc (Fair-Rite 42, 43, 44, 51, 61, 67 and 68 material)

Manganese (Fair-Rite 85 material)

Manganese zinc ferrites are completely vitrified and have very
low porosity. They have the highest permeabilities and exhibit
volume resistivities ranging from one hundred to several thou-
sand ohm-centimeter. Manganese zinc ferrite components are
used in tuned circuits and magnetic power designs from the low
kilohertz range into the broadcast spectrum. These ferrites have
a linear expansion coefficient of approximately 10 ppm/

o

C.

The nickel zinc ferrites vary in porosity, and frequently contain
oxides of other metals, such as those of magnesium, man-
ganese, copper or cobalt. Volume resistivities range from sev-
eral kilohm-centimeter to tens of megohm-centimeter. In gener-
al, they are used at higher frequencies (above 1 MHz), and are
suitable for low flux density applications. Nickel zinc ferrites have
a linear expansion coefficient of approximately 8 ppm/

o

C.

The manganese ferrite is a dense, temperature stable material
displaying a high degree of squareness in its hysteresis loop.
This makes this material uniquely suited for such applications as
multiple output control in switched-mode power supplies and
high frequency magnetic amplifiers.

As is evident from the flow diagram on page 3, there is consid-
erable processing involved, and the manufacturing cycle will
take a minimum of two weeks.  The parts listed in the catalog
represent a broad cross section of the wide variety of cores
produced by Fair-Rite Products.  Large OEM quantitites are
manufactured by Fair-Rite to order.  Most of the more commonly
used parts are stocked by our distributors, offering prompt
deliveries. For a complete listing of our distributors visit our site
on the Internet at www.fair-rite.com.

Many of the parts produced by Fair-Rite are made to customer
specifications, and we welcome inquiries involving application-
specific designs. We have the capability to design tooling rapidly,
and have it fabricated either by our own tool shop or by outside
vendors.

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

Introduction

3

▼

▼

▼

Simplified Process Flow Diagram

Fair-Rite Products Corp.

CAGE # 34899
Federal ID# 141389596

Ferrite Cores

Standard Industrial Classification (SIC) 3264

North American Industry
Classification System (NAICS) 327113

Iron

Oxide

Batch

and

Mix

Mill

X-Ray Fluorescence

Chemical Analysis

Binders

Lubricants

Calcine

(Pre-Fire)

Form

Spray

Dry

Sinter

(Fire)

Pack

&

Ship

Burnish

Coat

Grind

Anneal

Assemble

Anneal

▼

▼

▼

▼

▼

Other

Oxides

▼

▼

▼

▼

▼

▼

▼

▼

▼

▼

▼

▼

Gap

▼

▼

▼

▼

▼

▼

▼

▼

▼

Assembled Bobbins
Multi-Aperture Cores

Beads
Toroids

Pot Cores
E Cores

EP Cores
PQ Cores

ETD Cores
U Cores

Bobbins

Off-Kiln

QC

Inspection

Final

QC

Inspection

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

Flux Density

B

@ Field Strength

H

Residual Flux Density

B

r

Coercive Force

H

c

Magnetic Properties of Ferrite Materials

4

Property

Unit

Symbol

68

67

61

51*

44

m

i

20

40

125

350

500

Additional ferrite mechanical and thermal characteristics are tabulated on page 159.

42 Material, specifically developed for absorber applications in anechoic chambers, is listed on page 126.

* New Fair-Rite material, added in this edition of the catalog.

Low flux density devices.

EMI suppression.

Power magnetics.

Special square loop ferrite.

Initial Permeability
@ B <10 gauss

gauss

2700

2300

2350

3200

3000

mT

270

230

235

320

300

oersted

40

20

15

10

10

A/m

3200

1600

1200

800

800

gauss

1000

800

1200

1200

1100

mT

100

80

120

120

110

oersted

7.0

3.5

1.8

0.60

0.45

A/m

560

280

144

48

36

Loss Factor

10

-6

tan 

d

/

m

i

500

150

30

40

125

@ Frequency

MHz

100

50

1.0

1.0

1.0

Temperature Coefficient of
Initial Permeability (20-70 

o

C)

Curie Temperature

o

C

T

c

>500

>475

>350

>170

>160

Resistivity

W 

cm

r

1x10

7

1x10

7

1x10

8

1x10

9

1x10

9

Power Loss Density

mW/cm

3

P

25kHz - 2000 G - 100

o

C

–

–

–

–

–

100kHz - 1000 G - 100

o

C

–

–

–

–

–

Recommended
Frequency Range

MHz

<400

<300

<100

–

–

Application

–

–

>200

<1000

20-250

Areas

–

–

–

–

–

–

–

–

–

–

See this page for additional
material data

%/

o

C

0.10

0.05

0.10

0.8

0.75

6

7

8

9

10

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

Magnetic Properties of Ferrite Materials

5

33

43

85

31*

77

78

73

75

76

600

850

900

1500

2000

2300

2500

5000

10000

2800

2900

4200

3400

4900

4800

3900

4300

4000

280

290

420

340

490

480

390

430

400

5

10

10

5

5

5

5

5

5

400

800

800

400

400

400

400

400

400

1200

1300

3700

2500

1800

1500

1500

1400

1800

120

130

370

250

180

150

150

140

180

0.60

0.45

0.50

0.35

0.30

0.20

0.24

0.16

0.12

48

36

40

28

24

16

19.2

13

9.6

25

250

30

20

15

4.5

10

15

15

0.2

1.0

0.1

0.1

0.1

0.1

0.1

0.1

0.025

>150

>130

>200

>130

>200

>200

>160

>140

>120

1x10

2

1x10

5

2x10

2

3x10

3

1x10

2

2x10

2

1x10

2

3x10

2

50

–

–

–

–

200

<115

–

140

–

–

–

–

–

–

<130

–

–

–

<3

<10

–

–

<3

<2.5

–

<0.75

<0.5

–

20-250

–

<500

–

–

<30

–

–

–

–

–

–

<0.1

<0.5

–

<0.1

–

–

–

<0.15

–

–

–

–

–

–

11

12

13

14

16

18

20

21

22

0.10

1.25

–

1.6

0.7

1.0

0.65

0.6

0.5

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

68 Material

6

0.1

1

10

100

Frequency (Hz)

Measured on an 18/10/6mm toroid using 
the HP 4284A and the HP 4291A.

Measured on an 18/10/6mm toroid at 10kHz.

Hysteresis Loop

H (oersted)

B

(gauss)

3000

2500

2000

1500

1000

500

0

Complex Permeability vs. Frequency

10

6

10

7

Initial Permeability vs. Temperature

35

30

25

20

15

10

5

0

Measured on an 18/10/6mm toroid at 100kHz.

Temperature(

o

C)

i

-50 0

100

200

300

400

500

68 Material Specifications:

Our highest frequency NiZn ferrite intended for broadband transformers, 
antennas and HF high Q inductor applications up to 100 MHz. 
This material is only supplied to customer-specific requirements 
and close consultation with our application staff is suggested.

Strong magnetic fields or excessive mechanical stresses may result 
in irreversible changes in permeability and losses.

Initial Permeability

20

@ B < 10 gauss

Flux Density

gauss

B

2700

@ Field Strength

oersted

H

40

Residual Flux Density

gauss

B

r

1000

Coercive Force

oersted

H

c

7.0

Loss Factor

10

-6

500

@ Frequency

  MHz

 

100

Temperature Coefficient of

%/

o

C

 

0.10

Initial Permeability (20 -70

o

C)

Curie Temperature

o

C

 

T

c

>500

Resistivity

1x10

7

Property

Unit

Symbol

Value

-10

0

10

20

30

40

10

8

10

9

25

o

C

100

o

C

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

7

67 Material

0.1

1

10

100

Frequency (Hz)

Measured on an 19/10/6mm toroid using 
the HP 4284A and the HP 4291A.

Measured on a 19/10/6mm toroid at 10kHz.

Hysteresis Loop

H (oersted)

B

(gauss)

2500

2000

1500

1000

500

0

Complex Permeability vs. Frequency

10

6

10

7

Initial Permeability vs. Temperature

200

150

100

50

0

Measured on a 19/10/6mm toroid at 100kHz.

Temperature(

o

C)

i

-50 0

100

200

300

400

500

67 Material Specifications:

A high frequency NiZn ferrite for the design of broadband transformers, 
antennas and HF,  high Q inductor applications up to 50 MHz. 
This material is only supplied to customer-specific requirements 
and close consultation with our application staff is suggested.

Strong magnetic fields or excessive mechanical stresses may result 
in irreversible changes in permeability and losses.

Initial Permeability

40

@ B < 10 gauss

Flux Density

gauss

B

2300

@ Field Strength

oersted

H

20

Residual Flux Density

gauss

B

r

800

Coercive Force

oersted

H

c

3.5

Loss Factor

10

-6

150

@ Frequency

  MHz

 

50

Temperature Coefficient of

%/

o

C

 

0.05

Initial Permeability (20 -70

o

C)

Curie Temperature

o

C

 

T

c

>475

Resistivity

1x10

7

Property

Unit

Symbol

Value

-5

0

5

10

15

20

10

8

10

9

25

o

C

100

o

C

 

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

61 Material

8

Measured on a 2661000301 using the HP4291A.

1

10

100

1000

Frequency (Hz)

Measured on a 19/10/6mm toroid using 
the HP 4284A and the HP 4291A.

Measured on a 19/10/6mm toroid at 10kHz.

Hysteresis Loop

H (oersted)

B

(gauss)

2500

2000

1500

1000

500

0

Complex Permeability vs. Frequency

10

6

10

7

Initial Permeability vs. Temperature

250

200

150

100

50

0

Measured on a 19/10/6mm toroid at 100kHz.

Temperature(

o

C)

i

-50

0

50 100 150 200 250 300 350 400 450

Temperature(

o

C)

61 Material Specifications:

A high frequency NiZn ferrite developed for a range of inductive 
applications up to 25 MHz. This material is also used in EMI applications 
for suppression of noise frequencies above 200 MHz.

EMI suppression beads, beads on leads, SM beads, wound beads, 
multi-aperture cores, round cable EMI suppression cores, rods, 
RFID rods, and toroids are all available in 61 material.

Strong magnetic fields or excessive mechanical stresses may result 
in irreversible changes in permeability and losses.

Initial Permeability

125

@ B < 10 gauss

Flux Density

gauss

B

2350

@ Field Strength

oersted

H

15

Residual Flux Density

gauss

B

r

1200

Coercive Force

oersted

H

c

1.8

Loss Factor

10

-6

30

@ Frequency

  MHz

 

1.0

Temperature Coefficient of

%/

o

C

 

0.10

Initial Permeability (20 -70

o

C)

Curie Temperature

o

C

 

T

c

>350

Resistivity

1x10

8

Property

Unit

Symbol

Value

-2

0

2

4

8

6

10

12

14

16

10

8

10

9

125

100

75

50

25

0

-40 -20

0

20

40

60

80

100 120 140

250MHz

100MHz

50MHz

(%)

Percent of Original Impedance vs. Temperature

25

o

C

100

o

C

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

9

51 Material

1

10

100

1000

Frequency (Hz)

Measured on a 17/10/6mm toroid 
using the HP 4284A and the HP 4291A.

Measured on a 17/10/6mm toroid at 10kHz.

Hysteresis Loop

H (oersted)

B

(gauss)

-0.5

0

0.5

3500

3000

2500

2000

1500

1000

500

0

Complex Permeability vs. Frequency

10

5

10

6

Initial Permeability vs. Temperature

Measured on a 17/10/6mm toroid at 100kHz.

Temperature(

o

C)

i

10

7

10

8

51 Material Specifications:

A new NiZn ferrite developed for low loss inductive designs 
for frequencies up to 5.0 MHz.

Initial Permeability

350

@ B < 10 gauss

Flux Density

gauss

B

3200

@ Field Strength

oersted

H

10

Residual Flux Density

gauss

B

r

1200

Coercive Force

oersted

H

c

0.60

Loss Factor

10

-6

40

@ Frequency

  MHz

 

1.0

Temperature Coefficient of

%/

o

C

 

0.8

Initial Permeability (20 -70

o

C)

Curie Temperature

o

C

 

T

c

>170

Resistivity

1x10

9

Property

Unit

Symbol

Value

0

200

400

600

800

1000

-50 -25

0

25

50

75 100 125 150 175 200

1

10

5

25

o

C

100

o

C

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

44 Material

10

Frequency (Hz)

Measured on a 17/10/6mm toroid 
using the HP 4284A and the HP 4291A.

Measured on a 17/10/6mm toroid at 10kHz. 

Hysteresis Loop

H (oersted)

B

(gauss)

-0.5

0

0.5

1

10

3500

3000

2500

2000

1500

1000

500

0

25

o

C

100

o

C

Complex Permeability vs. Frequency

10

5

10

6

Initial Permeability vs. Temperature

1000

800

600

400

200

0

Measured on a 17/10/6mm toroid at 100kHz.

Temperature(

o

C)

i

-50 -25

0

25

50

75 100 125 150 175 200

44 Material Specifications:

10

7

10

8

125

100

75

50

25

0

Measured on a 2644000301 using the HP4291A.

Temperature(

o

C)

-40

-20

0

20

40

60

80

100 120

A NiZn ferrite developed to combine a high suppression performance, 
from 30 MHz to 500 MHz, with a very high dc resistivity. 

SM beads, PC beads, wound beads, split round cable EMI suppression 
cores, round cable snap-its, and connector EMI suppression plates 
are all available in 44 material.

Initial Permeability

500

@ B < 10 gauss

Flux Density

gauss

B

3000

@ Field Strength

oersted

H

10

Residual Flux Density

gauss

B

r

1100

Coercive Force

oersted

H

c

0.45

Loss Factor

10

-6

125

@ Frequency

  MHz

 

1.0

Temperature Coefficient of

%/

o

C

 

0.75

Initial Permeability (20 -70

o

C)

Curie Temperature

o

C

 

T

c

>160

Resistivity

1x10

9

Property

Unit

Symbol

Value

1

10

100

1000

25MHz

100MHz

50MHz

5

(%)

Percent of Original Impedance vs. Temperature

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

11

33 Material

10

100

1000

10000

Frequency (Hz)

Measured on a 17/10/6mm toroid 
using the HP 4284A and, the HP 4291A.

Measured on a 17/10/6mm toroid at 10kHz.

Hysteresis Loop

H (oersted)

B

(gauss)

3000

2500

2000

1500

1000

500

0

Complex Permeability vs. Frequency

10

5

10

6

Initial Permeability vs. Temperature

Measured on a 17/10/6mm toroid at 100kHz.

Temperature(

o

C)

i

10

7

10

8

33 Material Specifications:

An economical MnZn ferrite designed for use in open circuit 
applications for frequencies up to 3.0 MHz.

Rods are available in 33 material.

Note: This material is not recommended for new designs.

Initial Permeability

600

@ B < 10 gauss

Flux Density

gauss

B

2800

@ Field Strength

oersted

H

5

Residual Flux Density

gauss

B

r

1200

Coercive Force

oersted

H

c

0.60

Loss Factor

10

-6

25

@ Frequency

  MHz

 

0.2

Temperature Coefficient of

%/

o

C

 

0.10

Initial Permeability (20 -70

o

C)

Curie Temperature

o

C

 

T

c

>150

Resistivity

1x10

2

Property

Unit

Symbol

Value

0

200

400

600

800

1000

-50 -25

0

25

50

75 100 125 150 175 200

-0.5

0

0.5

1

5

3

 

25

o

C

100

o

C

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

43 Material

12

10

100

1000

10000

Frequency (Hz)

Measured on a 17/10/6mm toroid at 10kHz.

Hysteresis Loop

H (oersted)

B

(gauss)

Complex Permeability vs. Frequency

10

5

Initial Permeability vs. Temperature

Measured on a 17/10/6mm toroid at 100kHz.

i

10

6

10

7

Measured on a 2643000301 using the HP4291A. 

Temperature(

o

C)

43 Material Specifications:

This NiZn is our most popular ferrite for suppression of conducted 
EMI from 20 MHz to 250 MHz.  This material is also used for inductive 
applications such as high frequency common-mode chokes.

EMI suppression beads, beads on leads, SM beads, multi-aperture 
cores, round cable EMI suppression cores, split round EMI suppression 
cores, round cable snap-its, flat cable EMI suppression cores, 
flat cable snap-its, miscellaneous suppression cores, bobbins, 
and toroids are all available in 43 material.

Initial Permeability

850

@ B < 10 gauss

Flux Density

gauss

B

2900

@ Field Strength

oersted

H

10

Residual Flux Density

gauss

B

r

1300

Coercive Force

oersted

H

c

0.45

Loss Factor

10

-6

250

@ Frequency

  MHz

 

1.0

Temperature Coefficient of

%/

o

C

 

1.25

Initial Permeability (20 -70

o

C)

Curie Temperature

o

C

 

T

c

>130

Resistivity

Property

Unit

Symbol

Value

1x10

5

10

8

0

25

50

75

100

125

-40

-20

0

20

40

60

80

100

120

25MHz

100MHz

50MHz

(%)

Percent of Original Impedance vs. Temperature

100

o

C

25

o

C

2000

1600

1200

800

400

0

Temperature(

o

C)

-50

-25

0

25

50

75

100

125

150

-0.5

0

0.5

1

10

5

0

500

1000

1500

2000

2500

3000

Measured on a 17/10/6mm toroid 
using the HP 4284A and the HP 4291A.

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

13

85 Material

85 Material Specifications:

A square hysteresis loop Mn ferrite developed for use in 
output regulators and magnetic amplifier designs.

Toroids are available in 85 material.

Initial Permeability

900

@ B < 10 gauss

Flux Density

gauss

B

4200

@ Field Strength

oersted

H

10

Residual Flux Density

gauss

B

r

3700

Coercive Force

oersted

H

c

0.50

Loss Factor

10

-6

30

@ Frequency

  MHz

 

0.1

Temperature Coefficient of

%/

o

C

 

–

Initial Permeability (20 -70

o

C)

Curie Temperature

o

C

 

T

c

>200

Resistivity

Property

Unit

Symbol

Value

2x10

2

Initial Permeability vs. Temperature

0

1000

2000

3000

4000

5000

6000

Measured on a 13/8/6mm toroid 
at 100kHz using the HP 4275.

Temperature(

o

C)

i

-50 -25

0

25

50

75 100 125 150 175 200 225 250

10

100

1000

10000

Frequency (Hz)

Measured on a 13/8/6mm toroid at 25oC 
using the HP 4284A and the HP 4291A.

 

Measured on a 13/8/6mm toroid at 10 kHz.

Hysteresis Loop

H (oersted)

B

(gauss)

-0.5

0

0.5

1

10

500

1000

1500

2000

2500

3000

3500

4000

4500

0

25

o

C

100

o

C

Complex Permeability vs. Frequency

10

4

10

5

10

6

10

7

5

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

85 Material

14

Flux Density, Coercive Force and

Squareness Ratio vs. Temperature 

0

500

1000

1500

2000

2500

3000

3500

4000

4500

5000

-25

0

25

50

75

100

125

Temperature (

o

C)

B

(gauss)

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

B

r

/B

B

H

c

Measured on a 13/8/6mm toroid at 
10 kHz. B is measured at H=10 oersted. 

 Power Loss Density vs. Flux Density

10

100

1000

10000

10

100

1000

10000

Flux Density (gauss)

10 kHz

25 kHz

100 kHz

400 kHz

Measured on a 13/8/6mm toroid at 25

o

C 

using a Clark Hess 258 VAW.

P

(mW/cm

3

)

B

r

/B

H

c

(oersted)

Power Loss Density vs. Temperature

0

200

400

600

800

1000

P

(mW/cm

3

)

Temperature(

o

C)

Measured on a 13/8/6mm toroid 
using a Clark Hess 258 VAW.

0

25

50

75

100

125

-25

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

15

31 Material

10

100

1000

10000

Frequency (Hz)

Measured on a 17/10/6mm toroid at 
25

o

C using the HP 4284A and the HP 4291A.

Measured on a 17/10/6mm toroid at 10kHz.

Hysteresis Loop

H (oersted)

B

(gauss)

-0.5

0

0.5

1

5

3500

3000

2500

2000

1500

1000

500

0

Complex Permeability vs. Frequency

10

5

10

6

Initial Permeability vs. Temperature

5000

4000

3000

2000

1000

0

Measured on a 17/10/6mm toroid at 100kHz.

Temperature(

o

C)

i

-50

0

50

100

150

10

7

10

8

120

100

80

60

40

20

0

Measured on a 2631000301 using the HP4291A.

Temperature(

o

C)

-40

-20

0

20

40

60

80

100

120

3

31 Material Specifications:

A new MnZn ferrite designed specifically for EMI suppression 
applications from as low as 1 MHz up to 500 MHz. This material does 
not have the dimensional resonance limitations associated with 
conventional MnZn ferrite materials.

EMI suppression beads, round cable EMI suppression cores, 
round cable snap-its, flat cable EMI suppression cores, and flat cable 
snap-its are all available in 31 material.

Initial Permeability

1500

@ B < 10 gauss

Flux Density

gauss

B

3400

@ Field Strength

oersted

H

5

Residual Flux Density

gauss

B

r

2500

Coercive Force

oersted

H

c

0.35

Loss Factor

10

-6

20

@ Frequency

  MHz

 

0.1

Temperature Coefficient of

%/

o

C

 

1.6

Initial Permeability (20 -70

o

C)

Curie Temperature

o

C

 

T

c

>130

Resistivity

3x10

3

Property

Unit

Symbol

Value

10MHz

25MHz

100MHz

50MHz

(%)

Percent of Original Impedance vs. Temperature

25

o

C

100

o

C

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

77 Material

16

10

100

1000

10000

Frequency (Hz)

Measured on an 18/10/6mm toroid at 10kHz.

Hysteresis Loop

H (oersted)

B

(gauss)

Complex Permeability vs. Frequency

10

4

Initial Permeability vs. Temperature

Measured on an 18/10/6mm toroid at 100kHz.

i

10

5

10

6

77 Material Specifications:

A MnZn ferrite for use in a wide range of high and low flux density 
inductive designs for frequencies up to 100 kHz.

Pot cores, EP cores, PQ cores, ETD cores, E&I cores, U cores, rods, 
tack bobbin cores, toroids, and bobbins are all available in 77 material.

Initial Permeability

2000

@ B < 10 gauss

Flux Density

gauss

B

4900

@ Field Strength

oersted

H

5

Residual Flux Density

gauss

B

r

1800

Coercive Force

oersted

H

c

0.30

Loss Factor

10

-6

15

@ Frequency

  MHz

 

0.1

Temperature Coefficient of

%/

o

C

 

0.7

Initial Permeability (20 -70

o

C)

Curie Temperature

o

C

 

T

c

>200

Resistivity

Property

Unit

Symbol

Value

1x10

2

10

7

100

o

C

25

o

C

Temperature(

o

C)

Measured on an 18/10/6mm toroid 
using the HP 4284A and the HP 4291A.

-0.5

0

0.5

1

5

3

0

1000

2000

3000

4000

5000

0

500

1000

1500

2000

2500

3000

3500

4000

-50

0

50

100

150

200

250

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

17

77 Material

 Power Loss Density vs. Flux Density

Power Loss Density vs. Temperature

100

1000

10000

B (gauss)

Measured on an 18/10/6mm toroid using the 
Clarke Hess 258 VAW at 100

o

C

P

(mW/cm

3

)

1

10

100

1000

10000

50kHz

10kHz

20kHz

100kHz

P

(mW/cm

3

)

Temperature(

o

C)

Measured on an 18/10/6mm  toroid using the 
Clarke Hess 258 VAW.

0

50

100

150

200

250

300

0

20

40

60

80

100

120

50kHz, 1500G

25kHz, 2000G

 Flux Density vs. Temperature 

-25

0

25

50

75

100

125

Temperature (

o

C)

Measured on an 18/10/6mm toroid at 10kHz 
and  H=5 oersted.

0

1000

2000

3000

4000

5000

6000

B 

(gauss)

Amplitude  Permeability vs. Flux Density

Measured on an 18/10/6mm toroid at 10kHz.

B (gauss)

a

0

2000

4000

6000

8000

10000

0

500

1000 1500 2000 2500 3000 3500

100

o

C

25

o

C

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

78 Material

18

10

100

1000

10000

Frequency (Hz)

Measured on an 18/10/6mm toroid at 10kHz.

Hysteresis Loop

H (oersted)

B

(gauss)

Complex Permeability vs. Frequency

10

4

Initial Permeability vs. Temperature

Measured on an 18/10/6mm toroid at 100kHz.

i

10

5

10

6

78 Material Specifications:

A  MnZn ferrite specifically designed for power applications for 
frequencies up to 200 kHz.

RFID rods, toroids, pot cores, EP cores, PQ cores, ETD cores, 
U cores, and E&I cores are all available in 78 material.

Initial Permeability

2300

@ B < 10 gauss

Flux Density

gauss

B

4800

@ Field Strength

oersted

H

5

Residual Flux Density

gauss

B

r

1500

Coercive Force

oersted

H

c

0.20

Loss Factor

10

-6

4.5

@ Frequency

  MHz

 

0.1

Temperature Coefficient of

%/

o

C

 

1.0

Initial Permeability (20 -70

o

C)

Curie Temperature

o

C

 

T

c

>200

Resistivity

Property

Unit

Symbol

Value

2x10

2

10

7

100

o

C

25

o

C

Temperature(

o

C)

Measured on an 18/10/6mm toroid 
using the HP 4284A and the HP 4291A.

-0.5

0

0.5

1

5

3

0

1000

2000

3000

4000

5000

-50

0

50

100

150

200

250

0

1000

2000

3000

4000

5000

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

19

78 Material

 Power Loss Density vs. Flux Density

100

1000

10000

B (gauss)

Measured on an 18/10/6mm toroid using the 
Clarke Hess 258 VAW at 100

o

C

P

(mW/cm

3

)

1

10

100

1000

10000

100kHz

25kHz

50kHz

200kHz

-25

0

25

50

75

100

125

Temperature (

o

C)

Measured on an 18/10/6 mm  toroid at 10kHz 
and  H=5 oersted.

 Flux Density vs. Temperature 

0

1000

2000

3000

4000

5000

6000

B 

(gauss)

Power Loss Density vs. Temperature

P

(mW/cm

3

)

Temperature(

o

C)

Measured on an 18/10/6mm toroid using the 
Clarke Hess 258 VAW.

0

20

40

60

80

100

120

0

50

100

150

200

250

100kHz, 1000G

25kHz, 2000G

Measured on an 18/10/6mm toroid at 10kHz.

B (gauss)

a

Amplitude  Permeability vs. Flux Density

0

2000

4000

6000

8000

10000

0

500

1000 1500 2000 2500 3000 3500

100

o

C

25

o

C

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

73 Material

20

10

100

1000

10000

Frequency (Hz)

Measured on a 2673000301 bead using the
HP 4284A and the HP 4291A.

Measured on a 17/10/6mm toroid at 10kHz.

Hysteresis Loop

H (oersted)

B

(gauss)

Complex Permeability vs. Frequency

10

5

Initial Permeability vs. Temperature

Measured on a 17/10/6mm toroid at 10kHz.

Temperature(

o

C)

i

10

6

10

7

Measured on a 2673000301 using the HP4291A. 

Temperature(

o

C)

73 Material Specifications:

A MnZn ferrite, supplied only in small cores, to suppress conducted 
EMI frequencies below 30 MHz. 

EMI suppression beads, beads on leads, SM beads, and multi-aperture 
cores are all available in 73 material.

Initial Permeability

2500

@ B < 10 gauss

Flux Density

gauss

B

3900

@ Field Strength

oersted

H

5

Residual Flux Density

gauss

B

r

1500

Coercive Force

oersted

H

c

0.24

Loss Factor

10

-6

10

@ Frequency

  MHz

 

0.1

Temperature Coefficient of

%/

o

C

 

0.65

Initial Permeability (20 -70

o

C)

Curie Temperature

o

C

 

T

c

>160

Resistivity

Property

Unit

Symbol

Value

-0.5

0

0.5

1

5

3

1x10

2

10

8

0

25

50

75

100

125

-40 -20

0

20

40

60

80 100 120 140

25MHz

10MHz

(%)

Percent of Original Impedance vs. Temperature

100

o

C

25

o

C

0

500

1000

1500

2000

2500

3000

3500

4000

0

1000

2000

3000

4000

5000

-40

0

40

80

120

160

200

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

21

75 Material

10

100

1000

10000

Frequency (Hz)

Measured on a 17/10/6mm toroid 
using the HP 4284A and the HP 4291A.

Measured on a 17/10/6mm toroid at 10kHz.

Hysteresis Loop

H (oersted)

B

(gauss)

Complex Permeability vs. Frequency

10

4

10

5

Initial Permeability vs. Temperature

Measured on a 17/10/6mm toroid at 10kHz.

Temperature(

o

C)

i

10

6

10

7

10000

1000

100

10

1

0

Measured on a 17/10/6mm toroid using the 
Clarke Hess 258 VAW at 100

o

C.

B (gauss)

10

100

1000

10000

75 Material Specifications:

A high permeability MnZn ferrite intended for a range of broadband 
and pulse transformer applications and common-mode inductor designs.

Toroids, E&I cores, and EP cores are all available in 75 material.

Initial Permeability

5000

@ B < 10 gauss

Flux Density

gauss

B

4300

@ Field Strength

oersted

H

5

Residual Flux Density

gauss

B

r

1400

Coercive Force

oersted

H

c

0.16

Loss Factor

10

-6

15

@ Frequency

  MHz

 

0.1

Temperature Coefficient of

%/

o

C

 

0.6

Initial Permeability (20 -70

o

C)

Curie Temperature

o

C

 

T

c

>140

Resistivity

Property

Unit

Symbol

Value

-0.5

0

0.5

1

5

3

3x10

2

Power Loss Density vs. Flux Density

0

500

1000

1500

2000

2500

3000

3500

4000

4500

100

o

C

25

o

C

0

2000

4000

6000

8000

10000

-50 -25

0

25

50

75 100 125 150 175 200

100kHz

10kHz

20kHz

50kHz

P (mW/cm

3

)

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

22

100

1000

10000

100000

Frequency (Hz)

Measured on a 17/10/6mm toroid 
using the HP 4284A and, the HP 4291A.

Measured on a 17/10/6mm toroid at 10kHz.

Hysteresis Loop

H (oersted)

B

(gauss)

Complex Permeability vs. Frequency

10

3

10

4

Initial Permeability vs. Temperature

Measured on a 17/10/6mm toroid at 10kHz.

Temperature(

o

C)

i

10

5

10

6

24000

20000

16000

12000

8000

4000

0

Measured on a 17/10/6mm toroid 
using the HP 54510A.

B (gauss)

0

500 1000 1500 2000 2500 3000 3500 4000

76 Material Specifications:

A MnZn ferrite with a 10K permeability and an acceptable Curie 
temperature for  broadband and pulse transformer designs and 
common-mode choke applications.

Toroids are available in 76 material.

Initial Permeability

10000

@ B < 10 gauss

Flux Density

gauss

B

4000

@ Field Strength

oersted

H

5

Residual Flux Density

gauss

B

r

1800

Coercive Force

oersted

H

c

0.12

Loss Factor

10

-6

15

@ Frequency

  MHz

 

0.025

Temperature Coefficient of

%/

o

C

 

0.5

Initial Permeability (20 -70

o

C)

Curie Temperature

o

C

 

T

c

>120

Resistivity

50

Property

Unit

Symbol

Value

-0.5

0

0.5

1

10

5

Amplitude Permeability vs. Flux Density

0

500

1000

1500

2000

2500

3000

3500

4000

4500

100

o

C

25

o

C

0

2500

5000

7500

10000

12500

15000

-50

-25

0

25

50

75

100

125

150

100

o

C

25

o

C

76 Material

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

23

Board
Components

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

24

EMI Suppression Beads

Fair-Rite offers a broad selection of EMI suppression beads with guaranteed impedance specifica-
tions over a wide frequency range.

• Beads with a “1” as the last digit of the part number

are not burnished, those with the last digit “2” are supplied
burnished to break the sharp edges.

• Beads can be supplied Parylene coated upon request.

The last digit of the Parylene coated part number is a “4”.
The minimum coating thickness for beads  is 0.005mm (.0002").
See page 159 for material characteristics of Parylene C.

• The “H” column gives for each bead size the calculated dc bias field in

oersted for 1 turn and 1 ampere direct current.  The actual dc H field in
the application is this value of “H” times the actual NI (ampere - turn) product.  For the effect of the dc bias on the impedance
of the bead material, see the graphs on pages 179-180, Figures 16-20.

• For typical impedance vs. frequency curves for these parts, see Figures 1-6.

• Beads are controlled for impedance limits only.  They are tested for impedance with a single turn, using the Hewlett Packard

HP 4193A Vector Impedance Meter for beads in 73, 31, and 43 material and the HP 4191A RF Impedance Analyzer for
61 material beads.

• For larger size cores, please refer to our Round Cable EMI Suppression Cores section found on pages 94-97.

• For any EMI suppression bead requirement not listed in the catalog, please contact our customer service group for

availability and pricing.

• The EMI Suppression Bead Kit (part number 0199000019) contains a selection of these cores.

See page 92.

Listed in ascending order of “B” dimension.

Part Number**

A

B

C*

Wt (g)

H (Oe)

10 MHz

25 MHz

100 MHz

250 MHz

 

2673901301

2673903301

2643004601

2673004701

2643004701

2643004101

2643004201

.01

.01

.01

.01

.01

.11

.22

6.0

5.7

4.7

4.0

4.0

2.6

2.6

16

24

 

 

24

35

2673004601

.01

4.7

12.5

19

12.5

31 

 

12.5

17

 

 

12.5

26 

48

70 

 

97

140 

 

0.95 - 0.05

0.45+0.1

3.8±0.2

.036

.020

.150

1.0 - 0.05

0.45+0.15

5.6±0.25

.038

.021

.220

1.1 - 0.1

0.65+0.1

4.1 - 0.3

.041

.028

.156

1.1 - 0.1

0.65+0.1

4.1 - 0.3

.041

.028

.156

1.45 - 0.15

0.7+0.1

2.3±0.15

.054

.029

.090

1.45 - 0.15

0.7+0.1

2.3±0.15

.054

.029

.090

3.5±0.2

0.75+0.1

4.45±0.35

.138

.031

.175

3.5±0.2

0.75+0.1

8.9±0.5

.138

.031

.350

**Bold part numbers designate preferred parts.

 *This dimension may be modified to suit specific applications.

Dimensions

 

(Bold numbers are in millimeters, light numbers are nominal in inches.)

  Typical Impedance(   )

Guaranteed Z Min is Z Typ -20%

1

1

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

25

EMI Suppression Beads

Listed in ascending order of “B” dimension.

Part Number**

A

B

C*

Wt (g)

H (Oe)

10 MHz

25 MHz

100 MHz

250 MHz

 

2673030101

.01

4.1

14

21

2673025301

.01

4.0

10

15

2673010101

.08

3.3

55

77

2673025001

.02

3.6

12.5

20

 

2673004801

.03

3.1

20

28

 

2673028602

.09

2.7

31

50

  

2673012401

.02

3.3

11

19

 

2673002201

.08

2.9

38

55

 

2673000501

.01

2.8

7.5

12

 

2643000501

.01

2.8

9

2673000201

.03

2.8

18

27

 

2673000101

.10

2.0

25

35

 

2643000101

.10

2.0

26

40 

2661000101

.10

2.0

27.5

43

2673000301

.18

2.0

44

62

 

3.5±0.25

1.42±0.05

1.65±0.025

2.1 - 0.15

2.1 - 0.15

2.13 - 0.1

1.95 - 0.2

2.0 - 0.15

2.0 - 0.15

2.0 - 0.15

2.0 - 0.15

3.5±0.2

3.5±0.2

3.5±0.2

3.5±0.2

3.5±0.2

0.8+0.1

0.85+0.1

0.85+0.1

0.85+0.1

0.85+0.1

0.85+0.1

1.05+0.1

1.05+0.1

1.05+0.1

1.05+0.1

1.05+0.1

1.3±0.1

1.3±0.1

1.3±0.1

1.3±0.1

1.3±0.1

2.7 - 0.45

3.8±0.2

3.68 - 0.25

2.9 - 0.45

2.9 - 0.45

5.6±0.15

10.4±0.25

1.65 - 0.25

1.65 - 0.25

3.8±0.25

3.8±0.25

3.25±0.25

3.25±0.25

3.25±0.25

6.0±0.25

6.0±0.25

.138

.056

.065

.080

.080

.082

.072

.076

.076

.076

.076

.138

.138

.138

.138

.138

.033

.034

.034

.034

.034

.034

.043

.043

.043

.043

.043

.051

.051

.051

.051

.051

1.22 - 0.13

0.8+0.1

5.3 - 0.45

.045

.033

.200

1.25 - 0.1

0.8+0.1

3.8±0.2

.047

.033

.150

1.95 - 0.25

0.8+0.1

10.0 - 0.4

.072

.033

.384

.097

.150

.140

.105

.105

.220

1.55 - 0.1

0.95+0.15

4.2 - 0.25

.059

.040

.160

1.95 - 0.2

1.05+0.1

10.4±0.25

.072

.043

.410

.410

.060

.060

.150

.150

.128

.128

.128

.236

.236

**Bold part numbers designate preferred parts.

 *This dimension may be modified to suit specific applications.

Dimensions

 

(Bold numbers are in millimeters, light numbers are nominal in inches.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2643020501

.02

3.4

 

17 

31 

 

 

 

 

 

 

 

 

 

2643706001

.06

2.5

 

26

45 

  

 

 

2643004801

.03

3.1

18

31

 

2643002201

.08

2.9

34

58 

 

 

2643000201

.03

2.8

16

31 

 

2643000301

.18

2.0

46

60 

 

Guaranteed Z Min is Z Typ -20%

1

  Typical Impedance(   )

1

22

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

26

EMI Suppression Beads

Listed in ascending order of “B” dimension.

Part Number**

A

B

C*

Wt (g)

H (Oe)

10 MHz

25 MHz

100 MHz

250 MHz

 

2661000301

2673000701

2643000701

2661000701

2643200101

2673022401

2643022401

2661022401

2673021801

2643021801

2661021801

2643023801

2661023801

2643001501

2643025601

2643023201

2673018001

2673004901

2643013801

2673001601

2643001601

.18

.38

.38

.38

.19

.38

.38

.38

.67

.67

.67

1.4

1.4

.10

.18

.06

.12

.18

.12

.09

.09

2.0

2.0

2.0

2.0

1.5

1.5

1.5

1.5

1.5

1.5

1.5

1.5

1.5

1.7

1.7

1.8

1.8

1.8

1.6

1.6

1.6

50

70

 

 

  

 

 

 

125 

125

170

 

41 

 

54

 

 

82

56

85

94

 

 

131

119

163

266 

238

326

35 

55 

 

30 

29

 

 

40

 

 

 

38 

 

16

 

 

125

89

30

58

55

95

96

192

21

38

15

41

58

24

24

19

30

3.5±0.2

3.5±0.2

3.5±0.2

3.5±0.2

5.1±0.25

5.1±0.25

5.1±0.25

5.1±0.25

5.1±0.25

5.1±0.25

5.1±0.25

5.1±0.25

5.1±0.25

3.5±0.2

3.5±0.2

2.85±0.1

2.85±0.1

2.85±0.1

3.5±0.2

3.55±0.15

3.55±0.15

1.3±0.1

1.3±0.1

1.3±0.1

1.3±0.1

1.45+0.25

1.45+0.25

1.45+0.25

1.45+0.25

1.45+0.25

1.45+0.25

1.45+0.25

1.45+0.25

1.45+0.25

1.6±0.1

1.6±0.1

1.65+0.15

1.65+0.15

1.65+0.15

1.65+0.25

1.65+0.25

1.65+0.25

6.0±0.25

12.7±0.35

12.7±0.35

12.7±0.35

3.4 - 0.45

6.35±0.25

6.35±0.25

6.35±0.25

11.1±0.35

11.1±0.35

11.1±0.35

22.85±0.75

22.85±0.75

3.25±0.25

6.0±0.25

3.75±0.25

6.65±0.25

10.45±0.25

4.05±0.25

3.3 - 0.4

3.3 - 0.4

.138

.138

.138

.138

.200

.200

.200

.200

.200

.200

.200

.200

.200

.138

.138

.112

.112

.112

.138

.140

.140

.051

.051

.051

.051

.062

.062

.062

.062

.062

.062

.062

.062

.062

.063

.063

.068

.068

.068

.070

.070

.070

.236

.500

.500

.500

.125

.250

.250

.250

.437

.437

.437

.900

.900

.128

.236

.147

.262

.410

.160

.122

.122

**Bold part numbers designate preferred parts.

 *This dimension may be modified to suit specific applications.

Dimensions

 

(Bold numbers are in millimeters, light numbers are nominal in inches.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Guaranteed Z Min is Z Typ -20%

1

87

  Typical Impedance(   )

1

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

27

EMI Suppression Beads

Listed in ascending order of “B” dimension.

A

B

C*

2673015301

.26

1.5

41

54

2643005701

.81

1.2

78

120 

2673000801

1.0

1.0

48

52

2643000801

1.0

1.0

63

92 

2643300101

2.1

1.0

115

200 

2673200201

1.3

1.1

88

125

2673003201

.87

1.1

59

85

2643003201

.87

1.1

63

88 

 

2643250402

1.2

.91

69

102 

2643250302

1.5

.91

85

122 

2631250202

2.5

.91

90

138

230

2643250202

2.5

.91

135

200 

2643375102

1.4

.60

35

50 

2643375002

3.1

.60

78

115 

2643006302

2.2

.60

53

80 

2643023402

3.4

.60

83

120 

2643023002

4.1

.60

100

145 

2673002402

1.1

.59

19

20

2643002402

1.1

.59

26

43 

2643012702

1.3

.51

24

38 

3.55±0.15

4.1 - 0.25

5.1±0.25

7.5±0.25

7.5±0.25

7.6±0.25

5.2±0.15

5.6 - 0.5

5.6 - 0.5

6.35±0.15

6.35±0.15

6.35±0.15

6.35±0.15

9.5±0.25

9.5±0.25

9.5±0.25

9.5±0.25

9.5±0.25

9.65±0.25

9.65±0.25

9.65±0.25

1.65+0.25

1.8±0.15

2.3±0.2

2.25+0.25

2.25+0.25

2.25+0.25

2.65±0.25

2.65±0.25

2.65±0.25

2.95+0.45

2.95+0.45

2.95+0.45

2.95+0.45

4.5+0.75

4.5+0.75

4.75+0.3

4.75+0.3

4.75+0.3

5.0±0.2

5.0±0.2

6.35±0.15

5.95±0.25

6.85±0.25

12.7±0.35

7.55±0.25

7.55±0.25

15.1±0.75

20.6±0.75

12.7±0.5

12.7±0.5

12.7±0.5

15.9±0.5

25.4±0.75

25.4±0.75

6.35±0.35

14.5±0.6

10.4±0.25

15.9±0.45

19.05±0.7

5.05 - 0.45

5.05 - 0.45

7.35±0.25

.140

.156

.200

.296

.296

.300

.205

.210

.210

.250

.250

.250

.250

.375

.375

.375

.375

.375

.380

.380

.380

.070

.071

.090

.094

.094

.094

.105

.105

.105

.125

.125

.125

.125

.192

.192

.193

.193

.193

.197

.197

.250

.234

.270

.500

.297

.297

.595

.812

.500

.500

.500

.625

1.000

1.000

.250

.570

.410

.625

.750

.190

.190

.290

**Bold part numbers designate preferred parts.

 *This dimension may be modified to suit specific applications.

Dimensions

 

(Bold numbers are in millimeters, light numbers are nominal in inches.)

Part Number**

A

B

C*

Wt (g)

H (Oe)

10 MHz

25 MHz

100 MHz

250 MHz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2643001301

.18

1.6

31

48 

1

Guaranteed Z Min is Z Typ -20%

  Typical Impedance(   )

1

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

150

125

100

75

50

25

0

10

6

10

7

10

8

10

9

Frequency  (Hz)

10

6

10

7

10

8

10

9

Frequency  (Hz)

10

6

10

7

10

8

Frequency  (Hz)

150

125

100

75

50

25

0

10

6

10

7

10

8

Frequency  (Hz)

10

6

10

7

10

8

10

9

Frequency  (Hz)

Figure 1   Impedance vs. Frequency for 73 material 

Figure 2   Impedance vs. Frequency for 73 material 

Figure 3   Impedance vs. Frequency for 43 material

Figure 4   Impedance vs. Frequency for 43 material 

Figure 5   Impedance vs. Frequency for 61 material 

40

30

20

10

0

EMI suppression beads.

EMI suppression beads.

EMI suppression beads.

EMI suppression beads.

150

125

100

75

50

25

0

300

250

200

150

100

50

0

EMI suppression beads.

2673000101 

2673004801 

2673004601

2673000501

2673021801

2673003201

2673000301

2673018001 

2643000701

2643000801

2643000301

2643001501

2643023801

2643300101

2643023002

2643005701

350

300

250

200

150

100

50

0

10

6

10

7

10

8

10

9

Frequency  (Hz)

Figure 6 

Impedance vs. Frequency for 61 material 

EMI suppression beads.

2661022401

2661000301

2661000101

2661023801

2661000701

2661021801

28

EMI Suppression Beads

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

29

Beads on Leads

Beads are supplied assembled on tinned copper wire to aid automated circuit assembly.

•

Parts with a “2” as the last digit of the part number are
supplied taped and reeled per IEC 60286-1 and EIA
Standard RS-296-F.  Taped and reeled parts are
supplied 4500 pieces on a 14” reel. Inside tape
spacing is 52.4±1.5 mm.  These parts can also be
supplied not taped and reeled and are then bulk packed.
The last digit of bulk packaged part number is a “1”.

• Wires are oxygen free high conductivity copper with a

tin/lead coating.  The resistance of the wire is
3.5 m

W

 maximum for the 22 AWG wire and 2.2 m

W

  maximum for the 20 AWG wire.

•

Beads are controlled for impedance limits only.  They are tested for impedance with a single turn, using a Hewlett Packard
HP 4193A Vector Impedance Meter for beads in 73 and 43 material and the HP 4191A RF  Impedance Analyzer for
61 material beads.

• Recommended storage and operating temperature is –55

o

C to 125

o

C.

• For impedance vs. frequency curves and DC bias curves for these parts, see Figures 1-30.

• For any bead on lead requirement not listed in the catalog, please contact our customer service group

for availability and pricing.

•

The Bead on Lead EMI Suppressor Kit (part number 0199000028) is available for prototype evaluation.
See page 92.

Dimensions

 

(Bold numbers are in millimeters, light numbers are nominal in inches.)

* Bold part numbers designate preferred parts.

Part Number*

A

B

C 

D

Wt (g)

DC Bias 

Curve

 

 

 

2773001112

2743001112

2761001112

2773015112

2743015112

2761015112

2773005112

2743005112

2761005112

2773003112

.4

.4

.4

.4

.4

.4

.4

.4

.4

.5

10 MHz

48

55

63

70

25 MHz

61

49

68

54

78

60

86

100 MHz

 

68 

56

82 

69

91 

 

75

250 MHz

80

 

100

113

Figure 1A

Figure 2A

Figure 3A

Figure 4A

Figure 5A

Figure 6A

Figure 7A

Figure 8A

Figure 9A

Figure 10A

Figure 1B

Figure 2B

Figure 3B

Figure 4B

Figure 5B

Figure 6B

Figure 7B

Figure 8B

Figure 9B

Figure 10B

3.5±0.25

62.0±1.5 4.45±0.25

0.65

.138

2.440

.175

22 AWG

3.5±0.25

62.0±1.5 4.45±0.25

0.65

.138

2.440

.175

22 AWG

3.5±0.25

62.0±1.5 4.45±0.25

0.65

.138

2.440

.175

22 AWG

3.5±0.25

62.0±1.5 5.25±0.25

0.65

.138

2.440

.206

22 AWG

3.5±0.25

62.0±1.5 5.25±0.25

0.65

.138

2.440

.206

22 AWG

3.5±0.25

62.0±1.5 5.25±0.25

0.65

.138

2.440

.206

22 AWG

3.5±0.25

62.0±1.5

6.0±0.25

0.65

.138

2.440

.236

22 AWG

3.5±0.25

62.0±1.5

6.0±0.25

0.65

.138

2.440

.236

22 AWG

3.5±0.25

62.0±1.5

6.0±0.25

0.65

.138

2.440

.236

22 AWG

3.5±0.25

62.0±1.5

6.7±0.25

0.65

.138

2.440

.263

22 AWG

Frequency 

Curve

Z, R

s

, X

L

 vs.

Guaranteed Z Min is Z Typ -20%

1

  Typical Impedance(   )

1

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

30

Beads on Leads

Dimensions

 

(Bold numbers are in millimeters, light numbers are nominal in inches.)

* Bold part numbers designate preferred parts.
+ Not available taped and reeled.

Part Number*

A

B

C 

D

Wt (g)

Frequency 

Curve

DC Bias 

Curve

10 MHz

25 MHz

100 MHz

250 MHz

 

 

 

 

 

2743003112

2761003112

2773004112

2743004112

2761004112

2773002112

2743002112

2761002112

2773007112

2743007112

2761007112

2773008112

2743008112

2761008112

2773009112

2743009112

2761009112

2743012201+

2743013211+

2743014221+

.5

.5

.5

.5

.5

.6

.6

.6

.6

.6

.6

.7

.7

.7

.8

.8

.8

4.5

5.5

6.5

94

110

125

151

–

–

–

65

100

75

115

88

115

96

145

116

170

143

193

235

280

100 

88

110 

94

133 

113

150 

125

180 

144

 

220 

175

271 

331 

391 

 

125

 

144

 

168

 

180

 

213

 

258

–

–

–

Figure 11A

Figure 12A

Figure 13A

Figure 14A

Figure 15A

Figure 16A

Figure 17A

Figure 18A

Figure 19A

Figure 20A

Figure 21A

Figure 22A

Figure 23A

Figure 24A

Figure 25A

Figure 26A

Figure 27A

Figure 28A

Figure 29A

Figure 30A

Figure 11B

Figure 12B

Figure 13B

Figure 14B

Figure 15B

Figure 16B

Figure 17B

Figure 18B

Figure 19B

Figure 20B

Figure 21B

Figure 22B

Figure 23B

Figure 24B

Figure 25B

Figure 26B

Figure 27B

Figure 28B

Figure 29B

Figure 30B

3.5±0.25

62.0±1.5

6.7±0.25

0.65

.138

2.440

.263

22 AWG

3.5±0.25

62.0±1.5

6.7±0.25

0.65

.138

2.440

.263

22 AWG

3.5±0.25

62.0±1.5

7.6±0.3

0.65

.138

2.440

.300

22 AWG

3.5±0.25

62.0±1.5

7.6±0.3

0.65

.138

2.440

.300

22 AWG

3.5±0.25

62.0±1.5

7.6±0.3

0.65

.138

2.440

.300

22 AWG

3.5±0.25

62.0±1.5

8.9±0.3

0.65

.138

2.440

.350

22 AWG

3.5±0.25

62.0±1.5

8.9±0.3

0.65

.138

2.440

.350

22 AWG

3.5±0.25

62.0±1.5

8.9±0.3

0.65

.138

2.440

.350

22 AWG

3.5±0.25

62.0±1.5

9.5±0.3

0.65

.138

2.440

.374

22 AWG

3.5±0.25

62.0±1.5

9.5±0.3

0.65

.138

2.440

.374

22 AWG

3.5±0.25

62.0±1.5

9.5±0.3

0.65

.138

2.440

.374

22 AWG

3.5±0.25

62.0±1.5

11.4±0.4

0.65

.138

2.440

.450

22 AWG

3.5±0.25

62.0±1.5

11.4±0.4

0.65

.138

2.440

.450

22 AWG

3.5±0.25

62.0±1.5

11.4±0.4

0.65

.138

2.440

.450

22 AWG

3.5±0.25

62.0±1.5

13.8±0.5

0.65

.138

2.440

.545

22 AWG

3.5±0.25

62.0±1.5

13.8±0.5

0.65

.138

2.440

.545

22 AWG

3.5±0.25

62.0±1.5

13.8±0.5

0.65

.138

2.440

.545

22 AWG

9.8±0.3

62.0±1.5

11.4±0.4

0.8

.385

2.440

.449

20 AWG

9.8±0.3

62.0±1.5

14.0±0.5

0.8

.385

2.440

.550

20 AWG

9.8±0.3

62.0±1.5

16.5±0.5

0.8

.385

2.440

.650

20 AWG

Z, R

s

, X

L

 vs.

Guaranteed Z Min is Z Typ -20%

1

  Typical Impedance(   )

1

80

P.O. Box J,One Commercial Row, Wallkill, NY 12589-0288

Phone: (888) FAIR RITE / (845) 895-2055   • 

 FAX: (888) FERRITE / (845) 895-2629  •  www.fair-rite.com   •  E-Mail: ferrites@fair-rite.com

(888) 324-7748

(888) 337-7483   Note: (914) Area Code has changed to (845).

Fair-Rite Products Corp.

14th Edition

31

Beads on Leads

Z, R

S

, X

L

 ()

Z, R

S

, X

L

 ()

Z, R

S

, X

L

 ()

10

6

10

7

10

8

10

9

Frequency  (Hz)

10

6

10

7

10

8

10

9

Frequency  (Hz)

10

6

10

7

10

8

10

9

Frequency  (Hz)

60

50

40

30

20

10

0

10

6

10

7

10

8

10

9

Frequency  (Hz)

10

6

10

7

10

8

10

9

Frequency  (Hz)

10

6

10

7

10

8

10

9

Frequency  (Hz)

Figure 1A  

Impedance, reactance, and resistance vs. 
frequency for bead on lead 2773001112.

Figure 1B  

Impedance vs. frequency with dc bias as 
parameter for bead on lead 2773001112.

Figure 2A  

Impedance, reactance, and resistance vs. 
frequency for bead on lead 2743001112.

Figure 2B  

Impedance vs. frequency with dc bias as 
parameter for bead on lead 2743001112.

Figure 3A  

Impedance, reactance, and resistance vs. 
frequency for bead on lead 2761001112.

Figure 3B  

Impedance vs. frequency with dc bias as 
parameter for bead on lead 2761001112.

60

50

40

30

20

10

0

80

60

40

20

0

80

60

40

20

0

100

80

60

40

20

0

100

80

60

40

20

0

Z

R

S

X

L

0A

.5A

.2A

2A

1A

5A

0A

.5A

.2A

1A
2A

3A

5A

0A

1A

2A

3A

5A

Z

R

S

X

L

Z

R

S

X

L