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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 Solid Core Flat 68.6mm Cable

ESD-FPL-50
KEMET
1: $7.08
899In Stock

Mfr. Part No.
ESD-FPL-50

Mouser Part No
80-ESD-FPL-50

KEMET

Ferrite Cable Cores Solid Core Flat 68.6mm Cable

Datasheet

899In Stock

$7.08

$4.09

$3.57

$3.56

Quote

Min.: 1
Mult.: 1

Ferrite Cable Cores Ferrite Bead Core EMI 0.8mm

B-20L-34
KEMET
1: $0.459
28,455In Stock

Mfr. Part No.
B-20L-34

Mouser Part No
80-B-20L-34

KEMET

Ferrite Cable Cores Ferrite Bead Core EMI 0.8mm

Datasheet

28,455In Stock

$0.459

$0.252

$0.19

$0.16

View

Min.: 1
Mult.: 1

Ferrite Cable Cores Ferrite Bead Core EMI 1mm

B-20L-25
KEMET
1: $0.292
53,963In Stock

Mfr. Part No.
B-20L-25

Mouser Part No
80-B-20L-25

KEMET

Ferrite Cable Cores Ferrite Bead Core EMI 1mm

Datasheet

53,963In Stock

$0.292

$0.17

$0.136

$0.126

View

Min.: 1
Mult.: 1

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

ESD-FPD-40-1
KEMET
1: $12.98
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

Datasheet

366In Stock

$12.98

$7.05

$6.09

$5.91

Min.: 1
Mult.: 1

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

B-20L-48B-L
KEMET
1: $0.348
33,385In 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

Datasheet

33,385In Stock

$0.348

$0.189

$0.145

$0.128

View

Min.: 1
Mult.: 1

Ferrite Cable Cores 40x1.5mm Bare Ni-Zn for Flat Cable

ESD-FPL-45-12
KEMET
1: $4.41
1,083In Stock

Mfr. Part No.
ESD-FPL-45-12

Mouser Part No
80-ESD-FPL-45-12

KEMET

Ferrite Cable Cores 40x1.5mm Bare Ni-Zn for Flat Cable

Datasheet

1,083In Stock

$4.41

$2.75

$2.50

$2.04

$1.49

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings 19mm

ESD-R-31C
KEMET
1: $3.34
88In Stock
600Expected 23/7/2026

Mfr. Part No.
ESD-R-31C

Mouser Part No
80-ESD-R-31C

KEMET

Ferrite Toroids / Ferrite Rings 19mm

Datasheet

88In Stock

600Expected 23/7/2026

$3.34

$1.97

$1.74

$1.26

Min.: 1
Mult.: 1

Ferrite Cable Cores 11x8mm Bare Ni-Zn for Flat Cable

ESD-FPL-14.5-3
KEMET
1: $0.737
1,336In Stock

Mfr. Part No.
ESD-FPL-14.5-3

Mouser Part No
80-ESD-FPL-14.5-3

KEMET

Ferrite Cable Cores 11x8mm Bare Ni-Zn for Flat Cable

Datasheet

1,336In Stock

$0.737

$0.417

$0.414

$0.352

View

Min.: 1
Mult.: 1

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

ESD-R-25N-H
KEMET
1: $4.55
938In 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

Datasheet

938In Stock

$4.55

$2.67

$2.34

$1.72

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings 61x32.4x24mm Mn-Zn Case and Tape

ESD-R-57A-1
KEMET
1: $30.12
60In Stock

Mfr. Part No.
ESD-R-57A-1

Mouser Part No
80-ESD-R-57A-1

KEMET

Ferrite Toroids / Ferrite Rings 61x32.4x24mm Mn-Zn Case and Tape

Datasheet

60In Stock

$30.12

$19.57

$18.57

$15.47

Min.: 1
Mult.: 1

Ferrite Cable Cores 11x8mm Bare Ni-Zn for Flat Cable

ESD-FPL-14.5-5
KEMET
1: $0.737
4,318In Stock

Mfr. Part No.
ESD-FPL-14.5-5

Mouser Part No
80-ESD-FPL-14.5-5

KEMET

Ferrite Cable Cores 11x8mm Bare Ni-Zn for Flat Cable

Datasheet

4,318In Stock

$0.737

$0.389

$0.278

$0.24

$0.221

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings 5mm

ESD-R-10E
KEMET
1: $0.292
14,101In Stock

Mfr. Part No.
ESD-R-10E

Mouser Part No
80-ESD-R-10E

KEMET

Ferrite Toroids / Ferrite Rings 5mm

Datasheet

14,101In Stock

$0.292

$0.16

$0.122

$0.108

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 8.8mm

ESD-R-19B
KEMET
1: $3.78
683In 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

Datasheet

683In Stock

$3.78

$2.22

$1.96

$1.42

$1.39

Min.: 1
Mult.: 1

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

ESD-R-12M-H
KEMET
1: $1.88
2,498In 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

Datasheet

2,498In Stock

$1.88

$0.995

$0.705

$0.616

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings 39.5x18x14mm Mn-Zn Coated

ESD-R-38-P
KEMET
1: $12.65
154In Stock

Mfr. Part No.
ESD-R-38-P

Mouser Part No
80-ESD-R-38-P

KEMET

Ferrite Toroids / Ferrite Rings 39.5x18x14mm Mn-Zn Coated

Datasheet

154In Stock

$12.65

$6.49

$5.73

Min.: 1
Mult.: 1

Ferrite Cable Cores 48.3x2mm Split Core Ni-Zn for Flat Cable

ESD-FPD-34-1
KEMET
1: $11.66
184In Stock

Mfr. Part No.
ESD-FPD-34-1

Mouser Part No
80-ESD-FPD-34-1

KEMET

Ferrite Cable Cores 48.3x2mm Split Core Ni-Zn for Flat Cable

Datasheet

184In Stock

$11.66

$6.00

$5.21

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings 32x19x15.8mm Mn-Zn Coated

ESD-R-31-P
KEMET
1: $6.46
355In Stock

Mfr. Part No.
ESD-R-31-P

Mouser Part No
80-ESD-R-31-P

KEMET

Ferrite Toroids / Ferrite Rings 32x19x15.8mm Mn-Zn Coated

Datasheet

355In Stock

$6.46

$3.74

$3.27

$2.60

Min.: 1
Mult.: 1

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

ESD-R-19E-1
KEMET
1: $5.17
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

Datasheet

615In Stock

$5.17

$2.77

$2.40

$2.00

Min.: 1
Mult.: 1

Ferrite Cable Cores 22x1.3mm Bare Ni-Zn for Flat Cable

ESD-FPL-27-8
KEMET
1: $1.36
3,321In Stock

Mfr. Part No.
ESD-FPL-27-8

Mouser Part No
80-ESD-FPL-27-8

KEMET

Ferrite Cable Cores 22x1.3mm Bare Ni-Zn for Flat Cable

Datasheet

3,321In Stock

$1.36

$0.667

$0.513

$0.512

$0.506

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings 15.1mm

ESD-R-25L-A
KEMET
1: $3.46
779In Stock

Mfr. Part No.
ESD-R-25L-A

Mouser Part No
80-ESD-R-25L-A

KEMET

Ferrite Toroids / Ferrite Rings 15.1mm

Datasheet

779In Stock

$3.46

$2.45

$2.11

$1.85

View

Min.: 1
Mult.: 1

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

ESD-R-57N-H
KEMET
1: $29.18
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

Datasheet

57In Stock

$29.18

$15.39

$15.37

Min.: 1
Mult.: 1

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

ESD-R-25SR-P
KEMET
1: $7.94
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

576In Stock

$7.94

$4.57

$3.99

$3.79

Min.: 1
Mult.: 1

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

ESD-R-412119H-NC23
KEMET
1: $24.71
183In Stock

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

183In Stock

$24.71

$14.44

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings 50x23x18mm Mn-Zn Case and Tape

ESD-R-47-1
KEMET
1: $13.58
220On Order

Mfr. Part No.
ESD-R-47-1

Mouser Part No
80-ESD-R-47-1

KEMET

Ferrite Toroids / Ferrite Rings 50x23x18mm Mn-Zn Case and Tape

Datasheet

220On Order

$13.58

$6.95

$6.73

Min.: 1
Mult.: 1

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

ESD-R-220814XH-R1
KEMET
1: $3.00
617In 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

617In Stock

$3.00

$1.78

$1.45

$1.22

Min.: 1
Mult.: 1