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

ESD-SR-S47M
KEMET
1: CHF 11.40
393In 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

393In Stock

CHF 11.40

CHF 6.52

CHF 5.64

Min.: 1
Mult.: 1

Ferrite Clamp On Cores

Cable Single

- 40 C

+ 85 C

Bulk

Ferrite Cable Cores Ferrite Bead Core EMI 1mm

B-20L-25
KEMET
1: CHF 0.21
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

CHF 0.21

CHF 0.134

CHF 0.095

CHF 0.088

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Min.: 1
Mult.: 1
Max.: 60’000

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: CHF 7.83
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

CHF 7.83

CHF 4.45

CHF 3.85

CHF 3.56

Min.: 1
Mult.: 1

Ferrite Cable Cores

Flat Ribbon Cable Cores Split

Shield Bead

- 25 C

+ 85 C

Tray

Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 17.9mm

ESD-R-38D-B
KEMET
1: CHF 8.26
1’701In 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

1’701In Stock

CHF 8.26

CHF 4.75

CHF 4.10

CHF 3.85

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

EMI, Solid Toroidal Cores

- 25 C

+ 60 C

Bulk

Ferrite Clamp On Cores 15.5x18.5mm 300MHz Mn-Zn 85C

ESD-SR-S10M
KEMET
1: CHF 3.93
750In Stock

Mfr. Part No.
ESD-SR-S10M

Mouser Part No
80-ESD-SR-S10M

KEMET

Ferrite Clamp On Cores 15.5x18.5mm 300MHz Mn-Zn 85C

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Datasheet

750In Stock

CHF 3.93

CHF 2.47

CHF 2.15

CHF 1.68

CHF 1.67

Min.: 1
Mult.: 1
Max.: 3’200

Ferrite Clamp On Cores

Cable Single

- 40 C

+ 85 C

Bulk

Ferrite Cable Cores Ferrite Bead Core EMI 0.8mm

B-20L-34
KEMET
1: CHF 0.282
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

CHF 0.282

CHF 0.153

CHF 0.116

CHF 0.094

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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: CHF 1.64
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

CHF 1.64

CHF 0.973

CHF 0.861

CHF 0.624

CHF 0.564

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

EMI, Solid Toroidal Cores

- 25 C

+ 85 C

Bulk

Ferrite Clamp On Cores 6x33x16.4mm Ni-Zn 65C

ESD-SR-120
KEMET
1: CHF 2.61
2’296In Stock
2’100On Order

Mfr. Part No.
ESD-SR-120

Mouser Part No
80-ESD-SR-120

KEMET

Ferrite Clamp On Cores 6x33x16.4mm Ni-Zn 65C

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Datasheet

2’296In Stock

2’100On Order

CHF 2.61

CHF 1.75

CHF 1.54

CHF 1.14

CHF 1.10

Min.: 1
Mult.: 1
Max.: 2’800

Ferrite Clamp On Cores

Cable Single

+ 85 C

Bulk

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

B-20L-48B-L
KEMET
1: CHF 0.201
27’535In 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

27’535In Stock

CHF 0.201

CHF 0.11

CHF 0.10

CHF 0.089

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Min.: 1
Mult.: 1
Max.: 20’000

Ferrite Cable Cores

Round Cable Cores Solid

Shield Bead

- 25 C

+ 85 C

Bulk

Ferrite Toroids / Ferrite Rings 14mm

ESD-R-25
KEMET
1: CHF 1.92
260In Stock
300Expected 10/27/2026

Mfr. Part No.
ESD-R-25

Mouser Part No
80-ESD-R-25

KEMET

Ferrite Toroids / Ferrite Rings 14mm

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Datasheet

260In Stock

300Expected 10/27/2026

CHF 1.92

CHF 1.30

CHF 1.15

CHF 0.829

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

EMI, Solid Toroidal Cores

- 25 C

+ 85 C

Bulk

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

ESD-R-12M-H
KEMET
1: CHF 1.14
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

CHF 1.14

CHF 0.595

CHF 0.429

CHF 0.394

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: CHF 3.14
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

CHF 3.14

CHF 1.83

CHF 1.47

CHF 1.21

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

- 25 C

+ 85 C

Tray

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

ESD-R-25N-H
KEMET
1: CHF 2.77
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

CHF 2.77

CHF 1.62

CHF 1.41

CHF 1.04

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: CHF 17.73
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

CHF 17.73

CHF 9.26

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: CHF 2.29
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

CHF 2.29

CHF 1.35

CHF 1.19

CHF 0.861

CHF 0.837

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: CHF 16.76
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

CHF 16.76

CHF 8.99

CHF 8.96

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

- 40 C

+ 120 C

Tray

Ferrite Clamp On Cores 16x6x33mm Ni-Zn Snap-on

ESD-SR-120G
KEMET
1: CHF 2.56
1’037In Stock

Mfr. Part No.
ESD-SR-120G

Mouser Part No
80-ESD-SR-120G

KEMET

Ferrite Clamp On Cores 16x6x33mm Ni-Zn Snap-on

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Datasheet

1’037In Stock

CHF 2.56

CHF 1.51

CHF 1.32

CHF 0.955

Min.: 1
Mult.: 1

Ferrite Clamp On Cores

Snap On Cores

Cable Single

- 25 C

+ 85 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: CHF 4.60
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

CHF 4.60

CHF 2.65

CHF 2.37

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: CHF 3.11
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

CHF 3.11

CHF 1.82

CHF 1.59

CHF 1.53

CHF 1.38

Min.: 1
Mult.: 1
Max.: 1’600

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: CHF 1.83
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

CHF 1.83

CHF 1.09

CHF 0.955

CHF 0.829

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: CHF 2.05
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

Learn More

682In Stock

CHF 2.05

CHF 1.21

CHF 1.07

CHF 1.06

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: CHF 3.63
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

CHF 3.63

CHF 2.11

CHF 1.85

CHF 1.80

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: CHF 2.45
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

CHF 2.45

CHF 1.44

CHF 1.26

CHF 1.13

CHF 1.12

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: CHF 14.31
83In Stock
120Expected 4/27/2027

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

83In Stock

120Expected 4/27/2027

CHF 14.31

CHF 9.01

Min.: 1
Mult.: 1
Max.: 480

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: CHF 4.66
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

CHF 4.66

CHF 2.68

CHF 2.34

CHF 2.26

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

White Ring Toroidal Core

- 40 C

+ 120 C

Tray

EMI Cores

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