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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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (JPY) Filter the results in the table by unit price based on your quantity.	Qty.	Product Type	Product	Inside Diameter	Outside Diameter	Outside Length	Outside Height	Series	Packaging	Core Material
Ferrite Toroids / Ferrite Rings 6mm ESD-R-12D KEMET 1: ¥338.8 1,895In Stock	Mfr. Part # ESD-R-12D Mouser Part # 80-ESD-R-12D	KEMET	Ferrite Toroids / Ferrite Rings 6mm Learn More about KEMET emi cores	Datasheet	1,895In Stock	¥338.8 ¥201 ¥177.7 ¥128.9 ¥112.1	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 Ferrite Bead Incased EMI 17.9mm ESD-R-38D-B KEMET 1: ¥1,597.9 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 Learn More about KEMET emi cores	Datasheet	1,691In Stock	¥1,597.9 ¥978.3 ¥847.1 ¥764.1 ¥762.4	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 10.5mm ESD-R-15C KEMET 1: ¥227.6 100In Stock 800Expected 4/13/2027	Mfr. Part # ESD-R-15C Mouser Part # 80-ESD-R-15C	KEMET	Ferrite Toroids / Ferrite Rings 10.5mm Learn More about KEMET emi cores	Datasheet	100In Stock 800Expected 4/13/2027	¥227.6 ¥134.5 ¥99.3 ¥77.4 View ¥75.1 ¥74.1	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids	10.5 mm	15.2 mm	12.5 mm		ESD-R	Bulk	Nickel Zinc
Ferrite Toroids / Ferrite Rings 29x12.7x16mm 300MHz Ni-Zn 120C ESD-R-25N-H KEMET 1: ¥571.4 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 Learn More about KEMET emi cores	Datasheet	928In Stock	¥571.4 ¥333.9 ¥292.3 ¥209.3 ¥206	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids	12.7 mm	29 mm	16 mm		ESD-R-H	Tray
Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 8.8mm ESD-R-19B KEMET 1: ¥473.4 672In Stock	Mfr. Part # ESD-R-19B Mouser Part # 80-ESD-R-19B	KEMET	Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 8.8mm Learn More about KEMET emi cores	Datasheet	672In Stock	¥473.4 ¥279 ¥245.8 ¥177.7 ¥166.1	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 48.5x26x16mm Mn-Zn Coated ESD-R-47-P KEMET 1: ¥2,053 188In Stock	Mfr. Part # ESD-R-47-P Mouser Part # 80-ESD-R-47-P	KEMET	Ferrite Toroids / Ferrite Rings 48.5x26x16mm Mn-Zn Coated Learn More about KEMET emi cores	Datasheet	188In Stock	¥2,053 ¥1,137.8 ¥1,091.3 ¥1,046.4 ¥926.8	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids	26 mm	48.5 mm	16 mm		ESD-R	Tray	Manganese Zinc (MnZn)
Ferrite Toroids / Ferrite Rings 15x5x9mm 10MHz Mn-Zn 120C ESD-R-12M-H KEMET 1: ¥235.9 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 Learn More about KEMET emi cores	Datasheet	2,486In Stock	¥235.9 ¥124.9 ¥106.1 ¥95 View ¥88.5 ¥73.6	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: ¥142.8 4,679In Stock	Mfr. Part # ESD-R-14A Mouser Part # 80-ESD-R-14A	KEMET	Ferrite Toroids / Ferrite Rings 6.2mm Learn More about KEMET emi cores	Datasheet	4,679In Stock	¥142.8 ¥76.4 ¥57 ¥49.5 View ¥41 ¥40.9	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 19x10.7x5.3mm Ni-Zn Coated ESD-R-19E-1 KEMET 1: ¥649.5 603In 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 Learn More about KEMET emi cores	Datasheet	603In Stock	¥649.5 ¥378.7 ¥302.3 ¥239.2	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: ¥3,451.6 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 Learn More about KEMET emi cores	Datasheet	57In Stock	¥3,451.6 ¥2,212.5 ¥1,963.3 ¥1,837.1	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids	33.2 mm	33.2 mm	25 mm		ESD-R-H	Tray
Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1 ESD-R-220814XH-R1 KEMET 1: ¥377 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 Learn More about KEMET emi cores	Datasheet	602In Stock	¥377 ¥224.2 ¥197.7 ¥171.1 View ¥169.4 ¥159.3 ¥154 ¥149.3	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: ¥423.6 680In 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 Learn More about KEMET emi cores		680In Stock	¥423.6 ¥249.2 ¥219.3 ¥217.6 View ¥212.6 ¥201	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: ¥749.1 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 Learn More about KEMET emi cores	Datasheet	200In Stock	¥749.1 ¥435.2 ¥382 ¥368.7 View ¥367.1 ¥348.8 ¥340.5 ¥332.2 Quote	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 Coated Toroidal Mn-Zn Low Frequency AM Band 150kHz Ring High permeability S15H ESD-R-25SR-P KEMET 1: ¥948.4 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 Learn More about KEMET emi cores	Datasheet	76In Stock	¥948.4 ¥546.5 ¥488.3 ¥486.7	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-291216XH-R1 KEMET 1: ¥531.5 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 Learn More about KEMET emi cores	Datasheet	319In Stock	¥531.5 ¥312.3 ¥274.1 ¥239.2 ¥237.5	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: ¥2,953.3 79In 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 Learn More about KEMET emi cores	Datasheet	79In Stock 120Expected 4/27/2027	¥2,953.3 ¥1,860.3	Min.: 1 Mult.: 1 Max.: 480	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: ¥961.7 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 Learn More about KEMET emi cores	Datasheet	226In Stock	¥961.7 ¥553.1 ¥483.4 ¥461.8 View ¥460.1 ¥453.5 ¥438.5 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: ¥1,345.4 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 Learn More about KEMET emi cores	Datasheet	78In Stock	¥1,345.4 ¥769 ¥667.7 ¥666.1 View ¥664.4 Quote	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: ¥3,391.8 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 Learn More about KEMET emi cores	Datasheet	70In Stock	¥3,391.8 ¥2,245.7 ¥2,244	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 10mm ESD-R-19S KEMET 1: ¥330.5 2,304In Stock 960Expected 11/26/2026	Mfr. Part # ESD-R-19S Mouser Part # 80-ESD-R-19S	KEMET	Ferrite Toroids / Ferrite Rings 10mm Learn More about KEMET emi cores	Datasheet	2,304In Stock 960Expected 11/26/2026	¥330.5 ¥196 ¥174.4 ¥145.3 View ¥136.5 ¥128.4 ¥124.6	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 25.5mm ESD-R-47 KEMET 1: ¥1,112.9 688In Stock	Mfr. Part # ESD-R-47 Mouser Part # 80-ESD-R-47	KEMET	Ferrite Toroids / Ferrite Rings 25.5mm Learn More about KEMET emi cores	Datasheet	688In Stock	¥1,112.9 ¥583 ¥534.8 ¥518.2	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: ¥229.2 167In Stock 1,500Expected 2/2/2027	Mfr. Part # ESD-R-12CM Mouser Part # 80-ESD-R-12CM	KEMET	Ferrite Toroids / Ferrite Rings 12x7x15mm Ni-Zn Coated Learn More about KEMET emi cores	Datasheet	167In Stock 1,500Expected 2/2/2027	¥229.2 ¥121.4 ¥86.2 ¥77.2 ¥76.1	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: ¥144.5 3,000In Stock	Mfr. Part # ESD-R-12E Mouser Part # 80-ESD-R-12E	KEMET	Ferrite Toroids / Ferrite Rings 7.3mm Learn More about KEMET emi cores	Datasheet	3,000In Stock	¥144.5 ¥79.2 ¥59.3 ¥51.7 View ¥45.8 ¥39.4	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: ¥244.2 257In Stock	Mfr. Part # ESD-R-12N-H Mouser Part # 80-ESD-R-12N-H	KEMET	Ferrite Toroids / Ferrite Rings 15x5x9mm 300MHz Ni-Zn 120C Learn More about KEMET emi cores	Datasheet	257In Stock	¥244.2 ¥129.4 ¥91.4 ¥90.9 View ¥88.4 Quote	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids	5 mm	15 mm	9 mm		ESD-R-H	Tray
Ferrite Toroids / Ferrite Rings 7mm ESD-R-14C KEMET 1: ¥86.4 2,603In Stock 6,000Expected 2/2/2027	Mfr. Part # ESD-R-14C Mouser Part # 80-ESD-R-14C	KEMET	Ferrite Toroids / Ferrite Rings 7mm Learn More about KEMET emi cores	Datasheet	2,603In Stock 6,000Expected 2/2/2027	¥86.4 ¥47.2 ¥35.5 ¥31.1 View ¥27.1 ¥26.4	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids	7 mm	14 mm	3 mm		ESD-R	Bulk	Nickel Zinc