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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Description Datasheet Availability Pricing (USD) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Product Type
Product
Inside Diameter
Outside Diameter
Outside Length
Outside Height
Series
Packaging
Core Material
KEMET Ferrite Toroids / Ferrite Rings 6.2mm
Datasheet
6,199In Stock
Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Toroids 6.2 mm 15 mm 3.5 mm ESD-R Bulk Manganese Zinc (MnZn)
KEMET Ferrite Toroids / Ferrite Rings 48.5x26x16mm Mn-Zn Coated
Datasheet
68In Stock
Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Toroids 26 mm 48.5 mm 16 mm ESD-R Tray Manganese Zinc (MnZn)
KEMET Ferrite Toroids / Ferrite Rings 13mm
Datasheet
108In Stock
1,400On Order
Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Toroids 13 mm 26 mm 28.5 mm ESD-R Bulk Nickel Zinc
KEMET Ferrite Toroids / Ferrite Rings 57x36x20mm Mn-Zn Bare
Datasheet
64In Stock
Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Toroids 36 mm 57 mm 20 mm ESD-R Tray Manganese Zinc (MnZn)
KEMET Ferrite Toroids / Ferrite Rings 5mm
Datasheet
14,316In Stock
Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Toroids 5 mm 10 mm 5 mm ESD-R Bulk Nickel Zinc
KEMET Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 8.8mm
Datasheet
692In Stock
Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Toroids 8.8 mm 21.5 mm 13 mm ESD-R-B Bulk Manganese Zinc (MnZn)
KEMET Ferrite Toroids / Ferrite Rings 15mm
Datasheet
899In Stock
Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Toroids 15 mm 25 mm 8 mm ESD-R Bulk Nickel Zinc
KEMET Ferrite Toroids / Ferrite Rings 19x10.7x5.3mm Ni-Zn Coated
Datasheet
635In Stock
Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Toroids 10.7 mm 19 mm 5.3 mm ESD-R Tray Nickel Zinc
KEMET Ferrite Toroids / Ferrite Rings 15x5x9mm 10MHz Mn-Zn 120C
Datasheet
2,500In Stock
Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Toroids 5 mm 15 mm 9 mm ESD-R-H Tray
KEMET Ferrite Toroids / Ferrite Rings 32x19x15.8mm Mn-Zn Coated
Datasheet
355In Stock
Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Toroids 19 mm 32 mm 15.8 mm ESD-R Tray Manganese Zinc (MnZn)
KEMET Ferrite Toroids / Ferrite Rings 9mm
Datasheet
1,420In Stock
Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Toroids 9 mm 19 mm 11 mm ESD-R Bulk Manganese Zinc (MnZn)
KEMET Ferrite Toroids / Ferrite Rings 15.1mm
Datasheet
779In Stock
Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Toroids 15.1 mm 25.3 mm 12.1 mm ESD-R Bulk Nickel Zinc
KEMET Ferrite Toroids / Ferrite Rings 7.3mm
Datasheet
3,300In Stock
Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Toroids ESD-R Bulk Nickel Zinc
KEMET Ferrite Toroids / Ferrite Rings 7mm
Datasheet
6,349In Stock
Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Toroids 7 mm 14 mm 3 mm ESD-R Bulk Nickel Zinc
KEMET Ferrite Toroids / Ferrite Rings 29x12.7x16mm 300MHz Ni-Zn 120C
Datasheet
942In Stock
Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Toroids 12.7 mm 29 mm 16 mm ESD-R-H Tray
KEMET Ferrite Toroids / Ferrite Rings 61x33.2x25mm 300MHz Ni-Zn 120C
Datasheet
57In Stock
Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings Toroids 33.2 mm 33.2 mm 25 mm ESD-R-H Tray
KEMET Ferrite Toroids / Ferrite Rings Coated Toroidal Mn-Zn Low Frequency AM Band 150kHz Ring High permeability S15H 594In Stock
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
KEMET Ferrite Toroids / Ferrite Rings Toroidal w/case Nanocrystal Low Frequency 150kHz Ring -40/+120C UL94 V-0 212In Stock
Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings EMI Cores 21 mm 41 mm 19 mm ESD-R-412119H-NC23 Tray Nanocrystal
KEMET Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1 627In Stock
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
KEMET Ferrite Toroids / Ferrite Rings Bare,Toroidal Mn-Zn Low Frequency AM Band 150kHz Ring High permeability 10H 692In Stock
Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings EMI Cores 15 mm 25 mm 12 mm ESD-R-25SH Tray Manganese Zinc (MnZn) 7H
KEMET Ferrite Toroids / Ferrite Rings Toroidal,Mn-Zn Low Frequency AM Band 150kHz Ring High permeability S15H 143In Stock
300Expected 23/07/2026
Min.: 1
Mult.: 1

Ferrite Toroids / Ferrite Rings EMI Cores 16 mm 25 mm 13 mm ESD-R-25SR Tray Manganese Zinc (MnZn) S15H
KEMET Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1 334In Stock
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
KEMET Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1 236In Stock
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
KEMET Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal,Mn-Zn -40/+120C UL94 V-0 HR1 118In Stock
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
KEMET Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1 71In Stock
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