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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: $13.79
393In Stock

Mfr. Part #
ESD-SR-S47M

Mouser Part #
80-ESD-SR-S47M

KEMET

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

Datasheet

393In Stock

$13.79

$8.10

$6.75

$6.74

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 17.9mm

ESD-R-38D-B
KEMET
1: $9.39
1,691In Stock

Mfr. Part #
ESD-R-38D-B

Mouser Part #
80-ESD-R-38D-B

KEMET

Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 17.9mm

Datasheet

1,691In Stock

$9.39

$5.89

$5.10

$4.60

$4.59

Min.: 1
Mult.: 1

Ferrite Cable Cores Ferrite Bead Core EMI 1mm

B-20L-25
KEMET
1: $0.20
52,517In Stock

Mfr. Part #
B-20L-25

Mouser Part #
80-B-20L-25

KEMET

Ferrite Cable Cores Ferrite Bead Core EMI 1mm

Datasheet

52,517In Stock

$0.20

$0.127

$0.099

$0.093

View

Min.: 1
Mult.: 1
Max.: 60,000

Ferrite Cable Cores Ferrite Bead Core EMI 1.6mm

B-20L-44
KEMET
1: $0.15
48,616In Stock

Mfr. Part #
B-20L-44

Mouser Part #
80-B-20L-44

KEMET

Ferrite Cable Cores Ferrite Bead Core EMI 1.6mm

Datasheet

48,616In Stock

$0.15

$0.106

$0.096

$0.091

View

Min.: 1
Mult.: 1
Max.: 20,000

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

ESD-FPD-40-1
KEMET
1: $9.73
366In Stock

Mfr. Part #
ESD-FPD-40-1

Mouser Part #
80-ESD-FPD-40-1

KEMET

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

Datasheet

366In Stock

$9.73

$5.52

$4.78

$4.25

View

Min.: 1
Mult.: 1

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

ESD-SR-S10M
KEMET
1: $4.88
741In Stock

Mfr. Part #
ESD-SR-S10M

Mouser Part #
80-ESD-SR-S10M

KEMET

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

Datasheet

741In Stock

$4.88

$3.07

$2.68

$2.08

$2.07

Min.: 1
Mult.: 1
Max.: 3,200

Ferrite Cable Cores Ferrite Bead Core EMI 0.8mm

B-20L-34
KEMET
1: $0.35
27,395In Stock

Mfr. Part #
B-20L-34

Mouser Part #
80-B-20L-34

KEMET

Ferrite Cable Cores Ferrite Bead Core EMI 0.8mm

Datasheet

27,395In Stock

$0.35

$0.19

$0.144

$0.119

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings 6mm

ESD-R-12D
KEMET
1: $2.04
1,895In Stock

Mfr. Part #
ESD-R-12D

Mouser Part #
80-ESD-R-12D

KEMET

Ferrite Toroids / Ferrite Rings 6mm

Datasheet

1,895In Stock

$2.04

$1.21

$1.07

$0.775

$0.675

Min.: 1
Mult.: 1

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

ESD-SR-120
KEMET
1: $3.24
4,340In Stock

Mfr. Part #
ESD-SR-120

Mouser Part #
80-ESD-SR-120

KEMET

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

Datasheet

4,340In Stock

$3.24

$2.08

$1.91

$1.36

View

Min.: 1
Mult.: 1
Max.: 2,800

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

ESD-R-12M-H
KEMET
1: $1.42
2,486In Stock

Mfr. Part #
ESD-R-12M-H

Mouser Part #
80-ESD-R-12M-H

KEMET

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

Datasheet

2,486In Stock

$1.42

$0.74

$0.532

$0.483

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 8.8mm

ESD-R-19B
KEMET
1: $2.85
673In Stock

Mfr. Part #
ESD-R-19B

Mouser Part #
80-ESD-R-19B

KEMET

Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 8.8mm

Datasheet

673In Stock

$2.85

$1.68

$1.48

$1.07

$1.00

Min.: 1
Mult.: 1

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

ESD-R-19E-1
KEMET
1: $3.91
615In Stock

Mfr. Part #
ESD-R-19E-1

Mouser Part #
80-ESD-R-19E-1

KEMET

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

Datasheet

615In Stock

$3.91

$2.28

$1.82

$1.44

Min.: 1
Mult.: 1

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

ESD-R-25N-H
KEMET
1: $3.44
928In Stock

Mfr. Part #
ESD-R-25N-H

Mouser Part #
80-ESD-R-25N-H

KEMET

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

Datasheet

928In Stock

$3.44

$2.01

$1.76

$1.26

$1.24

Min.: 1
Mult.: 1

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

ESD-R-57N-H
KEMET
1: $20.77
57In Stock

Mfr. Part #
ESD-R-57N-H

Mouser Part #
80-ESD-R-57N-H

KEMET

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

Datasheet

57In Stock

$20.77

$11.45

$11.06

Quote

Min.: 1
Mult.: 1

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

ESD-SR-190736X-R1
KEMET
1: $3.86
942In Stock

Mfr. Part #
ESD-SR-190736X-R1

Mouser Part #
80-ESD-SR-190736X-R1

KEMET

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

Datasheet

942In Stock

$3.86

$2.25

$1.98

$1.90

View

Min.: 1
Mult.: 1
Max.: 1,600

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

ESD-R-220814XH-R1
KEMET
1: $2.27
602In Stock

Mfr. Part #
ESD-R-220814XH-R1

Mouser Part #
80-ESD-R-220814XH-R1

KEMET

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

Datasheet

602In Stock

$2.27

$1.35

$1.19

$1.03

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: $2.55
682In Stock

Mfr. Part #
ESD-R-25SH

Mouser Part #
80-ESD-R-25SH

KEMET

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

682In Stock

$2.55

$1.50

$1.32

$1.31

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: $4.51
200In Stock

Mfr. Part #
ESD-R-25SR

Mouser Part #
80-ESD-R-25SR

KEMET

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

Datasheet

200In Stock

$4.51

$2.62

$2.30

$2.23

View

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: $5.71
76In Stock

Mfr. Part #
ESD-R-25SR-P

Mouser Part #
80-ESD-R-25SR-P

KEMET

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

Datasheet

76In Stock

$5.71

$3.29

$2.94

Min.: 1
Mult.: 1

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

ESD-R-291216XH-R1
KEMET
1: $3.05
319In Stock

Mfr. Part #
ESD-R-291216XH-R1

Mouser Part #
80-ESD-R-291216XH-R1

KEMET

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

Datasheet

319In Stock

$3.05

$1.79

$1.57

$1.41

$1.40

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: $17.78
83In Stock
120Expected 4/27/2027

Mfr. Part #
ESD-R-412119H-NC23

Mouser Part #
80-ESD-R-412119HNC23

KEMET

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

Datasheet

83In Stock

120Expected 4/27/2027

$17.78

$11.20

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

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

ESD-R-421617XH-R1
KEMET
1: $5.79
226In Stock

Mfr. Part #
ESD-R-421617XH-R1

Mouser Part #
80-ESD-R-421617XH-R1

KEMET

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

Datasheet

226In Stock

$5.79

$3.33

$2.91

$2.80

View

Min.: 1
Mult.: 1

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

ESD-R-512419XH-R1
KEMET
1: $8.10
78In Stock

Mfr. Part #
ESD-R-512419XH-R1

Mouser Part #
80-ESD-R-512419XH-R1

KEMET

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

Datasheet

78In Stock

$8.10

$4.63

$4.02

$4.01

Quote

Min.: 1
Mult.: 1

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

ESD-R-613325XH-R1
KEMET
1: $20.42
70In Stock

Mfr. Part #
ESD-R-613325XH-R1

Mouser Part #
80-ESD-R-613325XH-R1

KEMET

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

Datasheet

70In Stock

$20.42

$13.52

$13.51

Min.: 1
Mult.: 1

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

ESD-SR-130527X-R1
KEMET
1: $2.73
1,210In Stock

Mfr. Part #
ESD-SR-130527X-R1

Mouser Part #
80-ESD-SR-130527X-R1

KEMET

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

Datasheet

1,210In Stock

$2.73

$1.61

$1.42

$1.27

View

Min.: 1
Mult.: 1