Ferrite Toroids / Ferrite Rings

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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 Ferrite Bead Incased EMI 17.9mm

ESD-R-38D-B
KEMET
1: Rp188.413
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

Rp188.413

Rp108.058

Rp93.381

Rp84.392

Rp84.208

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

17.9 mm

42.4 mm

16 mm

ESD-R-B

Bulk

Nickel Zinc

Ferrite Toroids / Ferrite Rings 6mm

ESD-R-12D
KEMET
1: Rp37.426
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

Rp37.426

Rp22.199

Rp19.630

Rp14.236

Rp12.384

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

6 mm

12.9 mm

6.4 mm

ESD-R

Bulk

Nickel Zinc

Ferrite Toroids / Ferrite Rings 14mm

ESD-R-25
KEMET
1: Rp43.663
263In Stock
300Expected 27/10/2026

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 27/10/2026

Rp43.663

Rp29.721

Rp26.235

Rp18.896

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Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

14 mm

26 mm

15 mm

ESD-R

Bulk

Manganese Zinc (MnZn)

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

ESD-R-12M-H
KEMET
1: Rp26.051
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

Rp26.051

Rp13.576

Rp9.760

Rp8.990

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Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

5 mm

15 mm

9 mm

ESD-R-H

Tray

Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 8.8mm

ESD-R-19B
KEMET
1: Rp52.286
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

Rp52.286

Rp30.821

Rp27.152

Rp19.630

Rp18.346

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

8.8 mm

21.5 mm

13 mm

ESD-R-B

Bulk

Manganese Zinc (MnZn)

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

ESD-R-57M-H
KEMET
1: Rp381.964
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

Rp381.964

Rp204.741

Rp198.320

Rp196.302

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

33.2 mm

61 mm

25 mm

ESD-R-H

Tray

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

ESD-R-25N-H
KEMET
1: Rp63.110
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

Rp63.110

Rp36.875

Rp32.289

Rp23.116

Rp22.749

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

12.7 mm

29 mm

16 mm

ESD-R-H

Tray

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

ESD-R-19E-1
KEMET
1: Rp71.733
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

Rp71.733

Rp41.829

Rp33.390

Rp26.418

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

10.7 mm

19 mm

5.3 mm

ESD-R

Tray

Nickel Zinc

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

ESD-R-57N-H
KEMET
1: Rp403.979
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

Rp403.979

Rp210.062

Rp202.907

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

33.2 mm

25 mm

ESD-R-H

Tray

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

ESD-R-25SR-P
KEMET
1: Rp104.756
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

Rp104.756

Rp60.358

Rp53.937

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

15.4 mm

25.9 mm

13.7 mm

ESD-R-25SR-P

Tray

Manganese Zinc (MnZn) S15H

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

ESD-R-220814XH-R1
KEMET
1: Rp41.645
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

Rp41.645

Rp24.767

Rp19.997

Rp18.896

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Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

7.7 mm

22 mm

14 mm

ESD-R-220814XH-R1

Tray

Manganese Zinc (MnZn) HR1

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

ESD-R-25SH
KEMET
1: Rp46.782
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

Rp46.782

Rp27.519

Rp24.217

Rp24.033

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Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

15 mm

25 mm

12 mm

ESD-R-25SH

Tray

Manganese Zinc (MnZn) 7H

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

ESD-R-25SR
KEMET
1: Rp82.740
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

Rp82.740

Rp48.067

Rp42.196

Rp40.728

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Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

16 mm

25 mm

13 mm

ESD-R-25SR

Tray

Manganese Zinc (MnZn) S15H

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

ESD-R-291216XH-R1
KEMET
1: Rp55.955
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

Rp55.955

Rp32.839

Rp28.803

Rp25.868

Rp25.684

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

12.7 mm

29 mm

16 mm

ESD-R-291216XH-R1

Tray

Manganese Zinc (MnZn) HR1

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

ESD-R-412119H-NC23
KEMET
1: Rp326.192
83In Stock
120Expected 27/04/2027

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 27/04/2027

Rp326.192

Rp205.475

Quote

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

21 mm

41 mm

19 mm

ESD-R-412119H-NC23

Tray

Nanocrystal

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

ESD-R-421617XH-R1
KEMET
1: Rp106.223
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

Rp106.223

Rp55.772

Rp48.433

Rp48.250

Quote

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

16.7 mm

42 mm

17 mm

ESD-R-421617XH-R1

Tray

Manganese Zinc (MnZn) HR1

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

ESD-R-512419XH-R1
KEMET
1: Rp148.786
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

Rp148.786

Rp77.420

Rp77.237

Rp76.503

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

24.4 mm

51 mm

19 mm

ESD-R-512419XH-R1

Tray

Manganese Zinc (MnZn) HR1

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

ESD-R-613325XH-R1
KEMET
1: Rp358.848
70In 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

70In Stock

Rp358.848

Rp236.113

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Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

33.2 mm

61 mm

25 mm

ESD-R-613325XH-R1

Tray

Manganese Zinc (MnZn) HR1

Ferrite Toroids / Ferrite Rings 25.5mm

ESD-R-47
KEMET
1: Rp122.918
688In Stock

Mfr. Part No.
ESD-R-47

Mouser Part No
80-ESD-R-47

KEMET

Ferrite Toroids / Ferrite Rings 25.5mm

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Datasheet

688In Stock

Rp122.918

Rp64.394

Rp59.074

Rp57.423

Quote

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

25.5 mm

48 mm

16 mm

ESD-R

Bulk

Manganese Zinc (MnZn)

Ferrite Toroids / Ferrite Rings 12x7x15mm Ni-Zn Coated

ESD-R-12CM
KEMET
1: Rp25.868
217In Stock
1.500Expected 02/02/2027

Mfr. Part No.
ESD-R-12CM

Mouser Part No
80-ESD-R-12CM

KEMET

Ferrite Toroids / Ferrite Rings 12x7x15mm Ni-Zn Coated

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Datasheet

217In Stock

1.500Expected 02/02/2027

Rp25.868

Rp15.190

Rp10.769

Rp9.778

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

7 mm

12 mm

15 mm

ESD-R

Tray

Nickel Zinc

Ferrite Toroids / Ferrite Rings 7.3mm

ESD-R-12E
KEMET
1: Rp13.576
1.500In Stock
1.500Expected 01/09/2026

Mfr. Part No.
ESD-R-12E

Mouser Part No
80-ESD-R-12E

KEMET

Ferrite Toroids / Ferrite Rings 7.3mm

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Datasheet

1.500In Stock

1.500Expected 01/09/2026

Rp13.576

Rp7.283

Rp5.449

Rp4.752

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

ESD-R

Bulk

Nickel Zinc

Ferrite Toroids / Ferrite Rings 15x5x9mm 300MHz Ni-Zn 120C

ESD-R-12N-H
KEMET
1: Rp26.969
267In Stock

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

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

KEMET

Ferrite Toroids / Ferrite Rings 15x5x9mm 300MHz Ni-Zn 120C

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Datasheet

267In Stock

Rp26.969

Rp14.292

Rp10.090

Rp10.017

Quote

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

5 mm

15 mm

9 mm

ESD-R-H

Tray

Ferrite Toroids / Ferrite Rings 6.2mm

ESD-R-14A
KEMET
1: Rp15.594
4.679In Stock

Mfr. Part No.
ESD-R-14A

Mouser Part No
80-ESD-R-14A

KEMET

Ferrite Toroids / Ferrite Rings 6.2mm

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Datasheet

4.679In Stock

Rp15.594

Rp8.329

Rp6.201

Rp5.375

Rp5.174

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

6.2 mm

15 mm

3.5 mm

ESD-R

Bulk

Manganese Zinc (MnZn)

Ferrite Toroids / Ferrite Rings 7mm

ESD-R-14C
KEMET
1: Rp9.540
2.603In Stock
6.000Expected 02/02/2027

Mfr. Part No.
ESD-R-14C

Mouser Part No
80-ESD-R-14C

KEMET

Ferrite Toroids / Ferrite Rings 7mm

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Datasheet

2.603In Stock

6.000Expected 02/02/2027

Rp9.540

Rp5.210

Rp3.926

Rp3.431

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

7 mm

14 mm

3 mm

ESD-R

Bulk

Nickel Zinc

Ferrite Toroids / Ferrite Rings 7mm

ESD-R-14C-2
KEMET
1: Rp13.209
1.140In Stock

Mfr. Part No.
ESD-R-14C-2

Mouser Part No
80-ESD-R-14C-2

KEMET

Ferrite Toroids / Ferrite Rings 7mm

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Datasheet

1.140In Stock

Rp13.209

Rp7.137

Rp5.320

Rp4.642

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Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

7 mm

14 mm

3 mm

ESD-R

Bulk

Nickel Zinc

EMI Cores

Customer Service Office

Company

Resources

Support

5 mm
6 mm
6.2 mm
7 mm
7.3 mm
7.7 mm
8.8 mm
9 mm
10 mm
10.5 mm
10.7 mm
11.6 mm
12.7 mm
13.9 mm
14 mm
14.8 mm
15 mm
15.4 mm
15.8 mm
16 mm

12 mm
12.9 mm
14 mm
15 mm
15.2 mm
15.8 mm
18.5 mm
19 mm
21.5 mm
22 mm
25 mm
25.3 mm
25.9 mm
26 mm
27 mm
28 mm
28.2 mm
29 mm
29.3 mm
31 mm

3 mm
3.5 mm
5.3 mm
5.5 mm
6.4 mm
8 mm
8.4 mm
9 mm
10 mm
11 mm
12 mm
12.3 mm
12.5 mm
12.7 mm
13 mm
13.2 mm
14 mm
15 mm
15.3 mm
15.8 mm