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EMI Cores

KEMET EMI Cores provide high-frequency noise suppression in electronic circuits. There are two ferrite material options for KEMET EMI Cores, namely Nickel-Zinc (NiZn) and Manganese Zinc (MnZn). The NiZn core material is typically effective for theMHz band range (FM-band frequencies), whereas the MnZn core material is typically effective for the kHz band range (AM-band frequencies). The MnZn core material offers a lower resistance compared to the NiZn and hence adequate insulation is required before use (recommended to measure the actual frequency-range effectiveness in the target application). The effective frequency range varies depending on core shape, size, and the number of turns.

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Part #

Ferrite Cable Cores Ferrite Bead Core EMI 0.8mm

B-20L-34
KEMET
1: $0.476
27,395In Stock

Mfr. Part No.
B-20L-34

Mouser Part No
80-B-20L-34

KEMET

Ferrite Cable Cores Ferrite Bead Core EMI 0.8mm

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Datasheet

27,395In Stock

$0.476

$0.258

$0.196

$0.162

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Min.: 1
Mult.: 1

Ferrite Cable Cores

Round Cable Cores Solid

Bead Core

- 25 C

+ 85 C

Bulk

Ferrite Toroids / Ferrite Rings 6mm

ESD-R-12D
KEMET
1: $2.77
1,895In Stock

Mfr. Part No.
ESD-R-12D

Mouser Part No
80-ESD-R-12D

KEMET

Ferrite Toroids / Ferrite Rings 6mm

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Datasheet

1,895In Stock

$2.77

$1.65

$1.46

$1.06

$0.918

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

EMI, Solid Toroidal Cores

- 25 C

+ 85 C

Bulk

Ferrite Cable Cores 4.8x2.4mm 300MHz Ni-Zn Bare

B-20L-48B-L
KEMET
1: $0.34
30,985In Stock

Mfr. Part No.
B-20L-48B-L

Mouser Part No
80-B-20L-48B-L

KEMET

Ferrite Cable Cores 4.8x2.4mm 300MHz Ni-Zn Bare

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Datasheet

30,985In Stock

$0.34

$0.185

$0.141

$0.125

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Min.: 1
Mult.: 1

Ferrite Cable Cores

Round Cable Cores Solid

Shield Bead

- 25 C

+ 85 C

Bulk

Ferrite Cable Cores Ferrite Bead Core EMI 1mm

B-20L-25
KEMET
1: $0.272
52,537In Stock

Mfr. Part No.
B-20L-25

Mouser Part No
80-B-20L-25

KEMET

Ferrite Cable Cores Ferrite Bead Core EMI 1mm

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Datasheet

52,537In Stock

$0.272

$0.173

$0.135

$0.126

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Min.: 1
Mult.: 1

Ferrite Cable Cores

Round Cable Cores Solid

Bead Core

- 25 C

+ 85 C

Bulk

Ferrite Cable Cores 56x2mm Split Core Ni-Zn for Flat Cable

ESD-FPD-40-1
KEMET
1: $13.23
366In Stock

Mfr. Part No.
ESD-FPD-40-1

Mouser Part No
80-ESD-FPD-40-1

KEMET

Ferrite Cable Cores 56x2mm Split Core Ni-Zn for Flat Cable

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Datasheet

366In Stock

$13.23

$7.51

$6.50

$5.78

$5.77

Min.: 1
Mult.: 1

Ferrite Cable Cores

Flat Ribbon Cable Cores Split

Shield Bead

- 25 C

+ 85 C

Tray

Ferrite Clamp On Cores 53x19mm 10MHz Mn-Zn 85C

ESD-SR-S47M
KEMET
1: $19.26
394In Stock

Mfr. Part No.
ESD-SR-S47M

Mouser Part No
80-ESD-SR-S47M

KEMET

Ferrite Clamp On Cores 53x19mm 10MHz Mn-Zn 85C

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Datasheet

394In Stock

$19.26

$11.03

$9.18

$9.17

Min.: 1
Mult.: 1

Ferrite Clamp On Cores

Cable Single

- 40 C

+ 85 C

Bulk

Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 17.9mm

ESD-R-38D-B
KEMET
1: $13.97
1,721In Stock

Mfr. Part No.
ESD-R-38D-B

Mouser Part No
80-ESD-R-38D-B

KEMET

Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 17.9mm

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Datasheet

1,721In Stock

$13.97

$8.01

$6.92

$6.26

$6.24

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

EMI, Solid Toroidal Cores

- 25 C

+ 60 C

Bulk

Ferrite Toroids / Ferrite Rings 14mm

ESD-R-25
KEMET
1: $3.02
263In Stock
300Expected 24/9/2026

Mfr. Part No.
ESD-R-25

Mouser Part No
80-ESD-R-25

KEMET

Ferrite Toroids / Ferrite Rings 14mm

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Datasheet

263In Stock

300Expected 24/9/2026

$3.02

$1.80

$1.59

$1.20

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

EMI, Solid Toroidal Cores

- 25 C

+ 85 C

Bulk

Ferrite Toroids / Ferrite Rings 29x12.7x16mm 300MHz Ni-Zn 120C

ESD-R-25N-H
KEMET
1: $4.68
928In Stock

Mfr. Part No.
ESD-R-25N-H

Mouser Part No
80-ESD-R-25N-H

KEMET

Ferrite Toroids / Ferrite Rings 29x12.7x16mm 300MHz Ni-Zn 120C

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Datasheet

928In Stock

$4.68

$2.73

$2.39

$1.71

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

- 40 C

+ 120 C

Tray

Ferrite Toroids / Ferrite Rings 19x10.7x5.3mm Ni-Zn Coated

ESD-R-19E-1
KEMET
1: $5.32
615In Stock

Mfr. Part No.
ESD-R-19E-1

Mouser Part No
80-ESD-R-19E-1

KEMET

Ferrite Toroids / Ferrite Rings 19x10.7x5.3mm Ni-Zn Coated

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Datasheet

615In Stock

$5.32

$3.10

$2.48

$1.96

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

- 25 C

+ 85 C

Tray

Ferrite Toroids / Ferrite Rings 15x5x9mm 10MHz Mn-Zn 120C

ESD-R-12M-H
KEMET
1: $1.93
2,496In Stock

Mfr. Part No.
ESD-R-12M-H

Mouser Part No
80-ESD-R-12M-H

KEMET

Ferrite Toroids / Ferrite Rings 15x5x9mm 10MHz Mn-Zn 120C

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Datasheet

2,496In Stock

$1.93

$1.01

$0.724

$0.685

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Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

- 40 C

+ 120 C

Tray

Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 8.8mm

ESD-R-19B
KEMET
1: $3.88
673In Stock

Mfr. Part No.
ESD-R-19B

Mouser Part No
80-ESD-R-19B

KEMET

Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 8.8mm

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Datasheet

673In Stock

$3.88

$2.28

$2.01

$1.46

$1.36

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

EMI, Solid Toroidal Cores

- 25 C

+ 60 C

Bulk

Ferrite Toroids / Ferrite Rings 61x33.2x25mm 10MHz Mn-Zn 120C

ESD-R-57M-H
KEMET
1: $28.38
60In Stock

Mfr. Part No.
ESD-R-57M-H

Mouser Part No
80-ESD-R-57M-H

KEMET

Ferrite Toroids / Ferrite Rings 61x33.2x25mm 10MHz Mn-Zn 120C

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Datasheet

60In Stock

$28.38

$15.18

$14.85

$14.55

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

- 40 C

+ 120 C

Tray

Ferrite Toroids / Ferrite Rings 61x33.2x25mm 300MHz Ni-Zn 120C

ESD-R-57N-H
KEMET
1: $29.95
57In Stock

Mfr. Part No.
ESD-R-57N-H

Mouser Part No
80-ESD-R-57N-H

KEMET

Ferrite Toroids / Ferrite Rings 61x33.2x25mm 300MHz Ni-Zn 120C

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Datasheet

57In Stock

$29.95

$15.57

$15.04

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

- 40 C

+ 120 C

Tray

Ferrite Toroids / Ferrite Rings Coated Toroidal Mn-Zn Low Frequency AM Band 150kHz Ring High permeability S15H

ESD-R-25SR-P
KEMET
1: $7.77
576In Stock

Mfr. Part No.
ESD-R-25SR-P

Mouser Part No
80-ESD-R-25SR-P

KEMET

Ferrite Toroids / Ferrite Rings Coated Toroidal Mn-Zn Low Frequency AM Band 150kHz Ring High permeability S15H

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Datasheet

576In Stock

$7.77

$4.47

$4.00

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

Ring Coated Toroidal Core

- 25 C

+ 85 C

Tray

Ferrite Clamp On Cores Mn-Zn HR1 Round Snap On 500MHz 85C 7x37.4x19.6x20.3mm

ESD-SR-190736X-R1
KEMET
1: $5.25
952In Stock

Mfr. Part No.
ESD-SR-190736X-R1

Mouser Part No
80-ESD-SR-190736X-R1

KEMET

Ferrite Clamp On Cores Mn-Zn HR1 Round Snap On 500MHz 85C 7x37.4x19.6x20.3mm

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Datasheet

952In Stock

$5.25

$3.06

$2.69

$2.58

View

Min.: 1
Mult.: 1

Ferrite Clamp On Cores

EMI Cores

Snap-On Ring Toroidal Core

- 25 C

+ 85 C

Tray

Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1

ESD-R-220814XH-R1
KEMET
1: $3.09
602In Stock

Mfr. Part No.
ESD-R-220814XH-R1

Mouser Part No
80-ESD-R-220814XH-R1

KEMET

Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1

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Datasheet

602In Stock

$3.09

$1.84

$1.48

$1.40

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

White Ring Toroidal Core

- 40 C

+ 120 C

Tray

Ferrite Toroids / Ferrite Rings Bare,Toroidal Mn-Zn Low Frequency AM Band 150kHz Ring High permeability 10H

ESD-R-25SH
KEMET
1: $3.47
682In Stock

Mfr. Part No.
ESD-R-25SH

Mouser Part No
80-ESD-R-25SH

KEMET

Ferrite Toroids / Ferrite Rings Bare,Toroidal Mn-Zn Low Frequency AM Band 150kHz Ring High permeability 10H

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682In Stock

$3.47

$2.04

$1.80

$1.78

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

Ring Bare Toroidal Core

- 25 C

+ 85 C

Tray

Ferrite Toroids / Ferrite Rings Toroidal,Mn-Zn Low Frequency AM Band 150kHz Ring High permeability S15H

ESD-R-25SR
KEMET
1: $6.13
250In Stock

Mfr. Part No.
ESD-R-25SR

Mouser Part No
80-ESD-R-25SR

KEMET

Ferrite Toroids / Ferrite Rings Toroidal,Mn-Zn Low Frequency AM Band 150kHz Ring High permeability S15H

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Datasheet

250In Stock

$6.13

$3.56

$3.13

$3.02

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

Ring Bare Toroidal Core

- 25 C

+ 85 C

Tray

Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1

ESD-R-291216XH-R1
KEMET
1: $4.15
319In Stock

Mfr. Part No.
ESD-R-291216XH-R1

Mouser Part No
80-ESD-R-291216XH-R1

KEMET

Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1

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Datasheet

319In Stock

$4.15

$2.43

$2.14

$1.92

$1.90

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

White Ring Toroidal Core

- 40 C

+ 120 C

Tray

Ferrite Toroids / Ferrite Rings Toroidal w/case Nanocrystal Low Frequency 150kHz Ring -40/+120C UL94 V-0

ESD-R-412119H-NC23
KEMET
1: $24.18
85In Stock
120Expected 27/4/2027

Mfr. Part No.
ESD-R-412119H-NC23

Mouser Part No
80-ESD-R-412119HNC23

KEMET

Ferrite Toroids / Ferrite Rings Toroidal w/case Nanocrystal Low Frequency 150kHz Ring -40/+120C UL94 V-0

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Datasheet

85In Stock

120Expected 27/4/2027

$24.18

$15.23

Quote

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

Ring Toroidal Core

- 40 C

+ 120 C

Tray

Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1

ESD-R-421617XH-R1
KEMET
1: $7.87
236In Stock

Mfr. Part No.
ESD-R-421617XH-R1

Mouser Part No
80-ESD-R-421617XH-R1

KEMET

Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1

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Datasheet

236In Stock

$7.87

$4.13

$3.59

$3.58

Quote

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

White Ring Toroidal Core

- 40 C

+ 120 C

Tray

Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal,Mn-Zn -40/+120C UL94 V-0 HR1

ESD-R-512419XH-R1
KEMET
1: $11.03
78In Stock

Mfr. Part No.
ESD-R-512419XH-R1

Mouser Part No
80-ESD-R-512419XH-R1

KEMET

Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal,Mn-Zn -40/+120C UL94 V-0 HR1

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Datasheet

78In Stock

$11.03

$5.74

$5.73

$5.67

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

White Ring Toroidal Core

- 40 C

+ 120 C

Tray

Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1

ESD-R-613325XH-R1
KEMET
1: $26.60
71In Stock

Mfr. Part No.
ESD-R-613325XH-R1

Mouser Part No
80-ESD-R-613325XH-R1

KEMET

Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1

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Datasheet

71In Stock

$26.60

$17.50

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

White Ring Toroidal Core

- 40 C

+ 120 C

Tray

Ferrite Clamp On Cores Mn-Zn HR1 Round Snap On 500MHz 85C 5x28x14.4x14.2mm

ESD-SR-130527X-R1
KEMET
1: $3.71
1,224In Stock

Mfr. Part No.
ESD-SR-130527X-R1

Mouser Part No
80-ESD-SR-130527X-R1

KEMET

Ferrite Clamp On Cores Mn-Zn HR1 Round Snap On 500MHz 85C 5x28x14.4x14.2mm

Learn More

Datasheet

1,224In Stock

$3.71

$2.19

$1.73

$1.60

View

Min.: 1
Mult.: 1

Ferrite Clamp On Cores

EMI Cores

Snap-On Ring Toroidal Core

- 25 C

+ 85 C

Tray

EMI Cores

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