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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 Toroids / Ferrite Rings 9.5mm

ESD-R-17S
KEMET
1: £1.13
6,988In Stock
5,280On Order

Mfr. Part No.
ESD-R-17S

Mouser Part No
80-ESD-R-17S

KEMET

Ferrite Toroids / Ferrite Rings 9.5mm

Datasheet

6,988In Stock

5,280On Order

£1.13

£0.599

£0.477

£0.458

View

Min.: 1
Mult.: 1

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

B-20L-48B-L
KEMET
1: £0.188
31,245In 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

31,245In Stock

£0.188

£0.101

£0.078

£0.068

View

Min.: 1
Mult.: 1

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

ESD-SR-S47M
KEMET
1: £10.76
406In Stock

Mfr. Part No.
ESD-SR-S47M

Mouser Part No
80-ESD-SR-S47M

KEMET

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

Datasheet

406In Stock

£10.76

£6.64

£6.38

£6.09

View

Min.: 1
Mult.: 1

Ferrite Cable Cores Ferrite Bead Core EMI 1mm

B-20L-25
KEMET
1: £0.135
52,581In Stock

Mfr. Part No.
B-20L-25

Mouser Part No
80-B-20L-25

KEMET

Ferrite Cable Cores Ferrite Bead Core EMI 1mm

Datasheet

52,581In Stock

£0.135

£0.085

£0.074

£0.071

View

Min.: 1
Mult.: 1

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

ESD-FPD-40-1
KEMET
1: £7.31
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

£7.31

£4.16

£3.60

£3.32

Min.: 1
Mult.: 1

Ferrite Cable Cores Ferrite Bead Core EMI 0.8mm

B-20L-34
KEMET
1: £0.263
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

Datasheet

27,395In Stock

£0.263

£0.142

£0.108

£0.089

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings 6mm

ESD-R-12D
KEMET
1: £1.53
1,995In Stock

Mfr. Part No.
ESD-R-12D

Mouser Part No
80-ESD-R-12D

KEMET

Ferrite Toroids / Ferrite Rings 6mm

Datasheet

1,995In Stock

£1.53

£0.908

£0.803

£0.582

£0.526

Min.: 1
Mult.: 1

Ferrite Cable Cores Solid Core Flat 68.6mm Cable

ESD-FPL-50
KEMET
1: £4.02
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

£4.02

£2.32

£2.03

£1.94

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 17.9mm

ESD-R-38D-B
KEMET
1: £7.71
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

Datasheet

1,721In Stock

£7.71

£4.43

£3.82

£3.59

Min.: 1
Mult.: 1

Ferrite Cable Cores 48.5x2.2mm Bare Ni-Zn for Flat Cable

ESD-FPL-34
KEMET
1: £8.44
248In Stock

Mfr. Part No.
ESD-FPL-34

Mouser Part No
80-ESD-FPL-34

KEMET

Ferrite Cable Cores 48.5x2.2mm Bare Ni-Zn for Flat Cable

Datasheet

248In Stock

£8.44

£4.87

£4.66

£3.79

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings 14mm

ESD-R-25
KEMET
1: £1.67
300In Stock
300Expected 24/09/2026

Mfr. Part No.
ESD-R-25

Mouser Part No
80-ESD-R-25

KEMET

Ferrite Toroids / Ferrite Rings 14mm

Datasheet

300In Stock

300Expected 24/09/2026

£1.67

£0.995

£0.882

£0.661

Min.: 1
Mult.: 1

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

ESD-R-12M-H
KEMET
1: £1.07
2,497In 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

2,497In Stock

£1.07

£0.555

£0.40

£0.378

View

Min.: 1
Mult.: 1

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

ESD-R-19E-1
KEMET
1: £2.93
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

£2.93

£1.71

£1.37

£1.13

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings 15.1mm

ESD-R-25L-A
KEMET
1: £1.87
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

£1.87

£1.32

£1.14

£0.934

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings 10.5x5.5x20mm Ni-Zn Bare

ESD-R-10S
KEMET
1: £1.34
1,415In Stock

Mfr. Part No.
ESD-R-10S

Mouser Part No
80-ESD-R-10S

KEMET

Ferrite Toroids / Ferrite Rings 10.5x5.5x20mm Ni-Zn Bare

Datasheet

1,415In Stock

£1.34

£0.803

£0.705

£0.56

£0.479

Min.: 1
Mult.: 1

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

ESD-R-25N-H
KEMET
1: £2.58
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

Datasheet

928In Stock

£2.58

£1.51

£1.32

£0.969

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 8.8mm

ESD-R-19B
KEMET
1: £2.14
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

Datasheet

673In Stock

£2.14

£1.26

£1.11

£0.803

£0.78

Min.: 1
Mult.: 1

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

ESD-R-57M-H
KEMET
1: £15.64
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

Datasheet

60In Stock

£15.64

£8.37

£8.35

Min.: 1
Mult.: 1

Ferrite Clamp On Cores 19.6x7x37.4mm Ni-Zn Snap-on

ESD-SR-150G
KEMET
1: £3.11
491In Stock

Mfr. Part No.
ESD-SR-150G

Mouser Part No
80-ESD-SR-150G

KEMET

Ferrite Clamp On Cores 19.6x7x37.4mm Ni-Zn Snap-on

Datasheet

491In Stock

£3.11

£1.81

£1.59

£1.20

Min.: 1
Mult.: 1

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

ESD-R-57N-H
KEMET
1: £16.53
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

£16.53

£8.63

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: £4.29
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

£4.29

£2.47

£2.21

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: £13.35
140In 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

140In Stock

£13.35

£8.41

£8.40

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: £1.70
607In 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

607In Stock

£1.70

£1.01

£0.818

£0.773

View

Min.: 1
Mult.: 1

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

ESD-R-25SH
KEMET
1: £1.91
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

682In Stock

£1.91

£1.13

£0.995

£0.986

View

Min.: 1
Mult.: 1

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

ESD-R-25SR
KEMET
1: £3.39
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

250In Stock

£3.39

£1.96

£1.73

£1.67

View

Min.: 1
Mult.: 1