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 7.3mm

ESD-R-12C
KEMET
1: 4,17 kr.
2.216Expected 23/07/2026

Mfr. Part No.
ESD-R-12C

Mouser Part No
80-ESD-R-12C

KEMET

Ferrite Toroids / Ferrite Rings 7.3mm

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Datasheet

2.216Expected 23/07/2026

4,17 kr.

2,26 kr.

1,69 kr.

1,48 kr.

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Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

7.3 mm

11.8 mm

15 mm

ESD-R

Bulk

Nickel Zinc

Ferrite Toroids / Ferrite Rings 12x7x15mm Ni-Zn Coated

ESD-R-12CM
KEMET
1: 7,98 kr.
1.792On Order

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

1.792On Order

7,98 kr.

4,21 kr.

2,99 kr.

2,68 kr.

2,67 kr.

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: 4,49 kr.
2.998Expected 29/07/2026

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

2.998Expected 29/07/2026

4,49 kr.

2,42 kr.

1,81 kr.

1,69 kr.

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Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

ESD-R

Bulk

Nickel Zinc

Ferrite Toroids / Ferrite Rings 7mm

ESD-R-12S
KEMET
1: 5,01 kr.
1.500Expected 26/03/2026

Mfr. Part No.
ESD-R-12S

Mouser Part No
80-ESD-R-12S

KEMET

Ferrite Toroids / Ferrite Rings 7mm

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Datasheet

1.500Expected 26/03/2026

5,01 kr.

2,70 kr.

2,01 kr.

1,75 kr.

1,57 kr.

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

7 mm

12 mm

5.5 mm

ESD-R

Bulk

Nickel Zinc

Ferrite Toroids / Ferrite Rings 6.3mm

ESD-R-14S
KEMET
1: 8,88 kr.
1.100On Order

Mfr. Part No.
ESD-R-14S

Mouser Part No
80-ESD-R-14S

KEMET

Ferrite Toroids / Ferrite Rings 6.3mm

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Datasheet

1.100On Order

8,88 kr.

4,70 kr.

3,45 kr.

3,04 kr.

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

6.3 mm

14.3 mm

28.5 mm

ESD-R

Bulk

Nickel Zinc

Ferrite Toroids / Ferrite Rings 9mm

ESD-R-19
KEMET
1: 10,29 kr.
480Expected 23/07/2026

Mfr. Part No.
ESD-R-19

Mouser Part No
80-ESD-R-19

KEMET

Ferrite Toroids / Ferrite Rings 9mm

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Datasheet

480Expected 23/07/2026

10,29 kr.

6,12 kr.

5,42 kr.

3,61 kr.

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

9 mm

19 mm

11 mm

ESD-R

Bulk

Manganese Zinc (MnZn)

Ferrite Toroids / Ferrite Rings 9mm

ESD-R-19D
KEMET
1: 12,23 kr.
478Expected 21/05/2026

Mfr. Part No.
ESD-R-19D

Mouser Part No
80-ESD-R-19D

KEMET

Ferrite Toroids / Ferrite Rings 9mm

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Datasheet

478Expected 21/05/2026

12,23 kr.

7,31 kr.

6,48 kr.

4,43 kr.

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

9 mm

19 mm

11 mm

ESD-R

Bulk

Nickel Zinc

Ferrite Toroids / Ferrite Rings 10mm

ESD-R-19S
KEMET
1: 12,16 kr.
1.850On Order

Mfr. Part No.
ESD-R-19S

Mouser Part No
80-ESD-R-19S

KEMET

Ferrite Toroids / Ferrite Rings 10mm

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Datasheet

1.850On Order

12,16 kr.

7,25 kr.

6,36 kr.

4,39 kr.

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

10 mm

18.5 mm

10 mm

ESD-R

Bulk

Manganese Zinc (MnZn)

Ferrite Toroids / Ferrite Rings 10mm

ESD-R-19SD
KEMET
1: 6,48 kr.
1.981Expected 04/06/2026

Mfr. Part No.
ESD-R-19SD

Mouser Part No
80-ESD-R-19SD

KEMET

Ferrite Toroids / Ferrite Rings 10mm

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Datasheet

1.981Expected 04/06/2026

6,48 kr.

3,45 kr.

2,55 kr.

2,22 kr.

2,10 kr.

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

10 mm

18.5 mm

10 mm

ESD-R

Bulk

Nickel Zinc

Ferrite Toroids / Ferrite Rings 14mm

ESD-R-25
KEMET
1: 13,95 kr.
598On Order

Mfr. Part No.
ESD-R-25

Mouser Part No
80-ESD-R-25

KEMET

Ferrite Toroids / Ferrite Rings 14mm

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Datasheet

598On Order

13,95 kr.

8,28 kr.

7,31 kr.

5,14 kr.

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 Ferrite Bead Incased EMI 13.9mm

ESD-R-25B
KEMET
1: 16,11 kr.
600On Order

Mfr. Part No.
ESD-R-25B

Mouser Part No
80-ESD-R-25B

KEMET

Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 13.9mm

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Datasheet

600On Order

16,11 kr.

9,47 kr.

8,43 kr.

7,83 kr.

6,08 kr.

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

13.9 mm

29.3 mm

15 mm

ESD-R-B

Bulk

Manganese Zinc (MnZn)

Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 13.9mm

ESD-R-25D-B
KEMET
1: 16,11 kr.
584Expected 26/03/2026

Mfr. Part No.
ESD-R-25D-B

Mouser Part No
80-ESD-R-25D-B

KEMET

Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 13.9mm

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Datasheet

584Expected 26/03/2026

16,11 kr.

10,52 kr.

9,40 kr.

6,08 kr.

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

13.9 mm

29.3 mm

15 mm

ESD-R-B

Bulk

Nickel Zinc

Ferrite Toroids / Ferrite Rings 15mm

ESD-R-25SD
KEMET
1: 8,50 kr.
2.129On Order

Mfr. Part No.
ESD-R-25SD

Mouser Part No
80-ESD-R-25SD

KEMET

Ferrite Toroids / Ferrite Rings 15mm

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Datasheet

2.129On Order

8,50 kr.

4,45 kr.

3,27 kr.

3,23 kr.

3,19 kr.

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

15 mm

25 mm

12 mm

ESD-R

Bulk

Nickel Zinc

Ferrite Toroids / Ferrite Rings 16mm

ESD-R-28C
KEMET
1: 15,82 kr.
600Expected 27/07/2026

Mfr. Part No.
ESD-R-28C

Mouser Part No
80-ESD-R-28C

KEMET

Ferrite Toroids / Ferrite Rings 16mm

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Datasheet

600Expected 27/07/2026

15,82 kr.

9,40 kr.

8,21 kr.

6,64 kr.

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

16 mm

28 mm

13 mm

ESD-R

Bulk

Nickel Zinc

Ferrite Toroids / Ferrite Rings 32x19.5x9mm Ni-Zn Coated

ESD-R-31C-1
KEMET
1: 24,62 kr.
300Expected 23/07/2026

Mfr. Part No.
ESD-R-31C-1

Mouser Part No
80-ESD-R-31C-1

KEMET

Ferrite Toroids / Ferrite Rings 32x19.5x9mm Ni-Zn Coated

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Datasheet

300Expected 23/07/2026

24,62 kr.

14,40 kr.

12,61 kr.

10,00 kr.

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

19 mm

32 mm

9 mm

ESD-R

Tray

Nickel Zinc

Ferrite Toroids / Ferrite Rings 38x19x12.7mm 150kHz Mn-Zn 85C

ESD-R-38SR
KEMET
1: 39,61 kr.
200Expected 23/07/2026

Mfr. Part No.
ESD-R-38SR

Mouser Part No
80-ESD-R-38SR

KEMET

Ferrite Toroids / Ferrite Rings 38x19x12.7mm 150kHz Mn-Zn 85C

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Datasheet

200Expected 23/07/2026

39,61 kr.

20,74 kr.

17,83 kr.

17,46 kr.

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

EMI Cores

19 mm

38 mm

12.7 mm

ESD-R-SR

Tray

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

ESD-R-47-1
KEMET
1: 59,75 kr.
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

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Datasheet

220On Order

59,75 kr.

30,59 kr.

28,20 kr.

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

23 mm

50 mm

18 mm

ESD-R

Tray

Manganese Zinc (MnZn)

Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 25.5mm

ESD-R-47B
KEMET
1: 52,74 kr.
90On Order

Mfr. Part No.
ESD-R-47B

Mouser Part No
80-ESD-R-47B

KEMET

Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 25.5mm

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Datasheet

90On Order

52,74 kr.

32,60 kr.

28,42 kr.

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

25.5 mm

51.5 mm

17.5 mm

ESD-R-B

Bulk

Manganese Zinc (MnZn)

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

ESD-R-57A-1
KEMET
1: 135,40 kr.
60Expected 26/03/2026

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

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Datasheet

60Expected 26/03/2026

135,40 kr.

74,30 kr.

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

32.4 mm

61 mm

24 mm

ESD-R

Tray

Manganese Zinc (MnZn)

Ferrite Toroids / Ferrite Rings 32.4mm

ESD-R-57D-1
KEMET
1: 179,86 kr.
59Expected 23/04/2026

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

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

KEMET

Ferrite Toroids / Ferrite Rings 32.4mm

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Datasheet

59Expected 23/04/2026

179,86 kr.

104,07 kr.

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

32.4 mm

61 mm

24 mm

ESD-R

Bulk

Nickel Zinc

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

ESD-R-57M-H
KEMET
1: 130,85 kr.
60Expected 28/05/2026

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

60Expected 28/05/2026

130,85 kr.

71,39 kr.

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

33.2 mm

61 mm

25 mm

ESD-R-H

Tray

Ferrite Toroids / Ferrite Rings 26x14x15mm Ni-Zn Case and Tape

ESD-R-25D-1
KEMET
1: 15,89 kr.
Non-Stocked Lead-Time 23 Weeks

Mfr. Part No.
ESD-R-25D-1

Mouser Part No
80-ESD-R-25D-1

KEMET

Ferrite Toroids / Ferrite Rings 26x14x15mm Ni-Zn Case and Tape

Learn More

Datasheet

Non-Stocked Lead-Time 23 Weeks

15,89 kr.

9,40 kr.

8,21 kr.

5,99 kr.

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

14 mm

26 mm

15 mm

ESD-R

Tray

Nickel Zinc

Ferrite Toroids / Ferrite Rings 25.3x14.8x12.3mm Mn-Zn Coated

ESD-R-25MK
KEMET
1: 20,96 kr.
Lead-Time 23 Weeks

Mfr. Part No.
ESD-R-25MK

Mouser Part No
80-ESD-R-25MK

KEMET

Ferrite Toroids / Ferrite Rings 25.3x14.8x12.3mm Mn-Zn Coated

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Datasheet

Lead-Time 23 Weeks

20,96 kr.

11,26 kr.

8,28 kr.

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

14.8 mm

25.3 mm

12.3 mm

ESD-R

Tray

Manganese Zinc (MnZn)

Ferrite Toroids / Ferrite Rings 51x24.4x19mm 300MHz Ni-Zn 120C

ESD-R-47N-H
KEMET
1: 60,43 kr.
Lead-Time 23 Weeks

Mfr. Part No.
ESD-R-47N-H

Mouser Part No
80-ESD-R-47N-H

KEMET

Ferrite Toroids / Ferrite Rings 51x24.4x19mm 300MHz Ni-Zn 120C

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Datasheet

Lead-Time 23 Weeks

60,43 kr.

33,57 kr.

30,59 kr.

30,51 kr.

View

Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings

Toroids

24.4 mm

51 mm

19 mm

ESD-R-H

Tray

Ferrite Toroids / Ferrite Rings 57x36x20mm 150kHz Mn-Zn 85C

ESD-R-57SR
KEMET
60: 87,58 kr.
Non-Stocked Lead-Time 23 Weeks

Mfr. Part No.
ESD-R-57SR

Mouser Part No
80-ESD-R-57SR

KEMET

Ferrite Toroids / Ferrite Rings 57x36x20mm 150kHz Mn-Zn 85C

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Datasheet

Non-Stocked Lead-Time 23 Weeks

87,58 kr.

Min.: 60
Mult.: 15

Ferrite Toroids / Ferrite Rings

EMI Cores

36 mm

57 mm

20 mm

ESD-R-SR

Tray

EMI Cores

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Support

5 mm
5.5 mm
6 mm
6.2 mm
6.3 mm
7 mm
7.3 mm
7.7 mm
8.5 mm
8.8 mm
9 mm
9.4 mm
9.5 mm
10 mm
10.5 mm
10.7 mm
11.6 mm
12.7 mm
13 mm
13.8 mm

9.5 mm
10 mm
10.5 mm
11.8 mm
12 mm
12.9 mm
14 mm
14.3 mm
14.4 mm
15 mm
15.2 mm
15.8 mm
16 mm
16.5 mm
17.5 mm
17.7 mm
18 mm
18.5 mm
19 mm
19.6 mm

3 mm
3.5 mm
5 mm
5.3 mm
5.5 mm
6 mm
6.4 mm
8 mm
8.4 mm
9 mm
10 mm
11 mm
12 mm
12.1 mm
12.3 mm
12.5 mm
12.7 mm
13 mm
13.2 mm
14 mm