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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 (IDR) Filter the results in the table by unit price based on your quantity.	Qty.	Product Type	Product	Type	Minimum Operating Temperature	Maximum Operating Temperature	Mounting Style	Packaging
Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 17.9mm ESD-R-38D-B KEMET 1: Rp181.075,02 1.691In 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 Learn More about KEMET emi cores	Datasheet	1.691In Stock	Rp181.075,02 Rp129.155,84 Rp108.057,94 Rp93.564,60 View Rp84.391,60 Rp84.208,14	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids	EMI, Solid Toroidal Cores	- 25 C	+ 60 C		Bulk
Ferrite Clamp On Cores 53x19mm 10MHz Mn-Zn 85C ESD-SR-S47M KEMET 1: Rp264.916,24 372In Stock	Mfr. Part No. ESD-SR-S47M Mouser Part No 80-ESD-SR-S47M	KEMET	Ferrite Clamp On Cores 53x19mm 10MHz Mn-Zn 85C Learn More about KEMET emi cores	Datasheet	372In Stock	Rp264.916,24 Rp148.786,06 Rp127.688,16 Rp123.835,50 Rp123.652,04	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 85 C	Free Hanging	Bulk
Ferrite Clamp On Cores 6x21x16.5mm Ni-Zn 65C ESD-SR-100 KEMET 1: Rp42.195,80 3.385In Stock 2.070Expected 25/12/2026	Mfr. Part No. ESD-SR-100 Mouser Part No 80-ESD-SR-100	KEMET	Ferrite Clamp On Cores 6x21x16.5mm Ni-Zn 65C Learn More about KEMET emi cores	Datasheet	3.385In Stock 2.070Expected 25/12/2026	Rp42.195,80 Rp27.885,92 Rp25.317,48 Rp24.950,56 View Rp21.648,28 Rp19.813,68 Rp16.291,25 Rp16.272,90	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Ferrite Clamp On Cores	Cable Single		+ 85 C	Free Hanging	Bulk
Ferrite Cable Cores Ferrite Bead Core EMI 1mm B-20L-25 KEMET 1: Rp3.485,74 52.517In Stock	Mfr. Part No. B-20L-25 Mouser Part No 80-B-20L-25	KEMET	Ferrite Cable Cores Ferrite Bead Core EMI 1mm Learn More about KEMET Kemet EMI Cores	Datasheet	52.517In Stock	Rp3.485,74 Rp2.531,75 Rp2.128,14 Rp1.907,98 View Rp1.742,87 Rp1.651,14 Rp1.357,60	Min.: 1 Mult.: 1	Ferrite Cable Cores	Round Cable Cores Solid	Bead Core	- 25 C	+ 85 C		Bulk
Ferrite Cable Cores Ferrite Bead Core EMI 1.6mm B-20L-44 KEMET 1: Rp2.935,36 47.031In Stock	Mfr. Part No. B-20L-44 Mouser Part No 80-B-20L-44	KEMET	Ferrite Cable Cores Ferrite Bead Core EMI 1.6mm Learn More about KEMET Kemet EMI Cores	Datasheet	47.031In Stock	Rp2.935,36 Rp2.311,60 Rp2.036,41 Rp1.889,64 View Rp1.761,22 Rp1.687,83 Rp1.522,72 Rp1.284,22	Min.: 1 Mult.: 1	Ferrite Cable Cores	Round Cable Cores Solid	Bead Core	- 25 C	+ 85 C		Bulk
Ferrite Cable Cores 56x2mm Split Core Ni-Zn for Flat Cable ESD-FPD-40-1 KEMET 1: Rp179.790,80 339In Stock	Mfr. Part No. ESD-FPD-40-1 Mouser Part No 80-ESD-FPD-40-1	KEMET	Ferrite Cable Cores 56x2mm Split Core Ni-Zn for Flat Cable Learn More about KEMET emi cores	Datasheet	339In Stock	Rp179.790,80 Rp121.083,60 Rp101.453,38 Rp87.877,34 View Rp77.970,50 Rp77.787,04	Min.: 1 Mult.: 1	Ferrite Cable Cores	Flat Ribbon Cable Cores Split	Shield Bead	- 25 C	+ 85 C		Tray
Ferrite Clamp On Cores 6x18.5x14mm Ni-Zn 65C ESD-SR-S10 KEMET 1: Rp48.800,36 6.146In Stock	Mfr. Part No. ESD-SR-S10 Mouser Part No 80-ESD-SR-S10	KEMET	Ferrite Clamp On Cores 6x18.5x14mm Ni-Zn 65C Learn More about KEMET emi cores	Datasheet	6.146In Stock	Rp48.800,36 Rp32.472,42 Rp27.702,46 Rp24.583,64 View Rp21.464,82 Rp18.712,92 Rp17.006,74 Rp16.034,40	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Ferrite Clamp On Cores	Cable Single		+ 85 C	Free Hanging	Bulk
Ferrite Cable Cores Ferrite Bead Core EMI 0.8mm B-20L-34 KEMET 1: Rp6.421,10 27.395In Stock	Mfr. Part No. B-20L-34 Mouser Part No 80-B-20L-34	KEMET	Ferrite Cable Cores Ferrite Bead Core EMI 0.8mm Learn More about KEMET Kemet EMI Cores	Datasheet	27.395In Stock	Rp6.421,10 Rp4.494,77 Rp3.485,74 Rp3.100,47 View Rp2.641,82 Rp2.146,48 Rp1.944,68 Rp1.596,10	Min.: 1 Mult.: 1	Ferrite Cable Cores	Round Cable Cores Solid	Bead Core	- 25 C	+ 85 C		Bulk
Ferrite Toroids / Ferrite Rings 6mm ESD-R-12D KEMET 1: Rp37.425,84 1.895In Stock	Mfr. Part No. ESD-R-12D Mouser Part No 80-ESD-R-12D	KEMET	Ferrite Toroids / Ferrite Rings 6mm Learn More about KEMET emi cores	Datasheet	1.895In Stock	Rp37.425,84 Rp25.684,40 Rp22.198,66 Rp19.630,22 View Rp17.153,51 Rp14.236,50 Rp12.383,55	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids	EMI, Solid Toroidal Cores	- 25 C	+ 85 C		Bulk
Ferrite Clamp On Cores 9x39x20mm Ni-Zn 65C ESD-SR-160 KEMET 1: Rp77.420,12 5.314In Stock	Mfr. Part No. ESD-SR-160 Mouser Part No 80-ESD-SR-160	KEMET	Ferrite Clamp On Cores 9x39x20mm Ni-Zn 65C Learn More about KEMET emi cores	Datasheet	5.314In Stock	Rp77.420,12 Rp54.854,54 Rp47.149,22 Rp41.278,50 View Rp35.774,70 Rp32.655,88 Rp30.087,44 Rp28.436,30	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Ferrite Clamp On Cores	Cable Single		+ 85 C	Free Hanging	Bulk
Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 8.8mm ESD-R-19B KEMET 1: Rp52.286,10 672In 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 Learn More about KEMET emi cores	Datasheet	672In Stock	Rp52.286,10 Rp35.958,16 Rp30.821,28 Rp27.152,08 View Rp23.666,34 Rp19.630,22 Rp18.346,00	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids	EMI, Solid Toroidal Cores	- 25 C	+ 60 C		Bulk
Ferrite Toroids / Ferrite Rings 15x5x9mm 10MHz Mn-Zn 120C ESD-R-12M-H KEMET 1: Rp26.051,32 2.486In 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 Learn More about KEMET emi cores	Datasheet	2.486In Stock	Rp26.051,32 Rp17.502,08 Rp15.337,26 Rp13.704,46 View Rp12.273,47 Rp10.163,68 Rp9.374,81 Rp8.677,66	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids		- 40 C	+ 120 C		Tray
Ferrite Toroids / Ferrite Rings 6.2mm ESD-R-14A KEMET 1: Rp15.777,56 4.679In Stock	Mfr. Part No. ESD-R-14A Mouser Part No 80-ESD-R-14A	KEMET	Ferrite Toroids / Ferrite Rings 6.2mm Learn More about KEMET emi cores	Datasheet	4.679In Stock	Rp15.777,56 Rp11.007,60 Rp9.503,23 Rp8.439,16 View Rp7.466,82 Rp6.292,68 Rp5.320,34 Rp4.825,00 Rp4.659,88	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids	EMI, Solid Toroidal Cores	- 25 C	+ 85 C		Bulk
Ferrite Toroids / Ferrite Rings 48.5x26x16mm Mn-Zn Coated ESD-R-47-P KEMET 1: Rp233.544,58 188In Stock	Mfr. Part No. ESD-R-47-P Mouser Part No 80-ESD-R-47-P	KEMET	Ferrite Toroids / Ferrite Rings 48.5x26x16mm Mn-Zn Coated Learn More about KEMET emi cores	Datasheet	188In Stock	Rp233.544,58 Rp146.584,54 Rp124.385,88 Rp111.543,68 View Rp109.158,70 Rp102.370,68	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids		- 25 C	+ 85 C		Tray
Ferrite Toroids / Ferrite Rings 19x10.7x5.3mm Ni-Zn Coated ESD-R-19E-1 KEMET 1: Rp71.732,86 603In 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 Learn More about KEMET emi cores	Datasheet	603In Stock	Rp71.732,86 Rp49.167,28 Rp41.828,88 Rp33.389,72 View Rp28.619,76 Rp26.418,24	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids		- 25 C	+ 85 C		Tray
Ferrite Clamp On Cores 31.5x13x38mm Ni-Zn Snap-on ESD-SR-250G KEMET 1: Rp156.124,46 241In Stock	Mfr. Part No. ESD-SR-250G Mouser Part No 80-ESD-SR-250G	KEMET	Ferrite Clamp On Cores 31.5x13x38mm Ni-Zn Snap-on Learn More about KEMET emi cores	Datasheet	241In Stock	Rp156.124,46 Rp105.306,04 Rp88.611,18 Rp73.934,38 View Rp70.265,18 Rp65.862,14	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Snap On Cores	Cable Single	- 25 C	+ 85 C	Snap On	Tray
Ferrite Toroids / Ferrite Rings 29x12.7x16mm 300MHz Ni-Zn 120C ESD-R-25N-H KEMET 1: Rp63.110,24 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 Learn More about KEMET emi cores	Datasheet	928In Stock	Rp63.110,24 Rp43.480,02 Rp36.875,46 Rp32.288,96 View Rp28.069,38 Rp23.849,80 Rp23.482,88 Rp22.749,04	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids		- 40 C	+ 120 C		Tray
Ferrite Toroids / Ferrite Rings 10.5mm ESD-R-15C KEMET 1: Rp24.033,26 38In Stock 800Expected 13/04/2027	Mfr. Part No. ESD-R-15C Mouser Part No 80-ESD-R-15C	KEMET	Ferrite Toroids / Ferrite Rings 10.5mm Learn More about KEMET emi cores	Datasheet	38In Stock 800Expected 13/04/2027	Rp24.033,26 Rp16.694,86 Rp14.291,53 Rp12.640,39 View Rp10.915,87 Rp9.136,31 Rp8.622,62 Rp8.182,32	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids	EMI, Solid Toroidal Cores	- 25 C	+ 85 C		Bulk
Ferrite Toroids / Ferrite Rings 61x33.2x25mm 300MHz Ni-Zn 120C ESD-R-57N-H KEMET 1: Rp403.978,92 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 Learn More about KEMET emi cores	Datasheet	57In Stock	Rp403.978,92 Rp250.055,98 Rp216.849,72 Rp202.906,76	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids		- 40 C	+ 120 C		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: Rp41.645,42 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 Learn More about KEMET emi cores	Datasheet	602In Stock	Rp41.645,42 Rp28.619,76 Rp24.583,64 Rp21.648,28 View Rp18.896,38 Rp16.071,10	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	EMI Cores	White Ring Toroidal Core	- 40 C	+ 120 C		Tray
Ferrite Toroids / Ferrite Rings Bare,Toroidal Mn-Zn Low Frequency AM Band 150kHz Ring High permeability 10H ESD-R-25SH KEMET 1: Rp46.782,30 680In 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 Learn More about KEMET emi cores	Datasheet	680In Stock	Rp46.782,30 Rp32.288,96 Rp27.519,00 Rp24.216,72 View Rp22.932,50 Rp21.281,36 Rp21.097,90	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	EMI Cores	Ring Bare Toroidal Core	- 25 C	+ 85 C		Tray
Ferrite Toroids / Ferrite Rings Toroidal,Mn-Zn Low Frequency AM Band 150kHz Ring High permeability S15H ESD-R-25SR KEMET 1: Rp82.740,46 200In 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 Learn More about KEMET emi cores	Datasheet	200In Stock	Rp82.740,46 Rp56.689,14 Rp48.066,52 Rp42.195,80 View Rp36.508,54 Rp35.958,16	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	EMI Cores	Ring Bare Toroidal Core	- 25 C	+ 85 C		Tray
Ferrite Toroids / Ferrite Rings Coated Toroidal Mn-Zn Low Frequency AM Band 150kHz Ring High permeability S15H ESD-R-25SR-P KEMET 1: Rp104.755,66 76In 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 Learn More about KEMET emi cores	Datasheet	76In Stock	Rp104.755,66 Rp71.365,94 Rp60.358,34 Rp53.937,24 View Rp53.386,86 Rp53.203,40 Rp52.836,48	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	EMI Cores	Ring Coated Toroidal Core	- 25 C	+ 85 C		Tray
Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1 ESD-R-291216XH-R1 KEMET 1: Rp58.707,20 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 Learn More about KEMET emi cores	Datasheet	319In Stock	Rp58.707,20 Rp40.544,66 Rp34.490,48 Rp30.270,90 View Rp26.418,24 Rp24.033,26	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	EMI Cores	White Ring Toroidal Core	- 40 C	+ 120 C		Tray
Ferrite Toroids / Ferrite Rings Toroidal w/case Nanocrystal Low Frequency 150kHz Ring -40/+120C UL94 V-0 ESD-R-412119H-NC23 KEMET 1: Rp326.191,88 66In 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 Learn More about KEMET emi cores	Datasheet	66In Stock 120Expected 27/04/2027	Rp326.191,88 Rp215.382,04 Rp203.090,22 Rp202.906,76	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	EMI Cores	Ring Toroidal Core	- 40 C	+ 120 C		Tray

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