Passive Components – Mouser Canada

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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 (CAD) Filter the results in the table by unit price based on your quantity.	Qty.
Ferrite Clamp On Cores 53x19mm 10MHz Mn-Zn 85C ESD-SR-S47M KEMET 1: $20.13 373In Stock	Mfr. Part # ESD-SR-S47M Mouser Part # 80-ESD-SR-S47M	KEMET	Ferrite Clamp On Cores 53x19mm 10MHz Mn-Zn 85C Learn More about KEMET emi cores	Datasheet	373In Stock	$20.13 $11.68 $10.02 $9.72	Min.: 1 Mult.: 1
Ferrite Clamp On Cores 15.5x18.5mm 300MHz Mn-Zn 85C ESD-SR-S10M KEMET 1: $7.10 534In Stock	Mfr. Part # ESD-SR-S10M Mouser Part # 80-ESD-SR-S10M	KEMET	Ferrite Clamp On Cores 15.5x18.5mm 300MHz Mn-Zn 85C Learn More about KEMET emi cores	Datasheet	534In Stock	$7.10 $4.87 $4.13 $3.63 View $3.15 $3.00 $2.98	Min.: 1 Mult.: 1
Ferrite Cable Cores Ferrite Bead Core EMI 1mm B-20L-25 KEMET 1: $0.317 52,517In Stock	Mfr. Part # B-20L-25 Mouser Part # 80-B-20L-25	KEMET	Ferrite Cable Cores Ferrite Bead Core EMI 1mm Learn More about KEMET Kemet EMI Cores	Datasheet	52,517In Stock	$0.317 $0.229 $0.194 $0.167 View $0.147 $0.145 $0.13 $0.107	Min.: 1 Mult.: 1
Ferrite Cable Cores Ferrite Bead Core EMI 1.6mm B-20L-44 KEMET 1: $0.274 47,031In Stock	Mfr. Part # B-20L-44 Mouser Part # 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	$0.274 $0.207 $0.181 $0.161 View $0.147 $0.132 $0.12 $0.101	Min.: 1 Mult.: 1
Ferrite Cable Cores 56x2mm Split Core Ni-Zn for Flat Cable ESD-FPD-40-1 KEMET 1: $14.11 364In Stock	Mfr. Part # ESD-FPD-40-1 Mouser Part # 80-ESD-FPD-40-1	KEMET	Ferrite Cable Cores 56x2mm Split Core Ni-Zn for Flat Cable Learn More about KEMET emi cores	Datasheet	364In Stock	$14.11 $9.50 $7.96 $6.90 $6.12	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 17.9mm ESD-R-38D-B KEMET 1: $14.21 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	$14.21 $10.14 $8.48 $7.34 View $6.62 $6.61	Min.: 1 Mult.: 1
Ferrite Clamp On Cores 6x18.5x14mm Ni-Zn 65C ESD-SR-S10 KEMET 1: $3.83 6,152In Stock	Mfr. Part # ESD-SR-S10 Mouser Part # 80-ESD-SR-S10	KEMET	Ferrite Clamp On Cores 6x18.5x14mm Ni-Zn 65C Learn More about KEMET emi cores	Datasheet	6,152In Stock	$3.83 $2.55 $2.17 $1.93 View $1.68 $1.47 $1.33 $1.26	Min.: 1 Mult.: 1
Ferrite Cable Cores Ferrite Bead Core EMI 0.8mm B-20L-34 KEMET 1: $0.504 27,395In Stock	Mfr. Part # B-20L-34 Mouser Part # 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	$0.504 $0.353 $0.274 $0.243 View $0.207 $0.174 $0.157 $0.125	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 6mm ESD-R-12D KEMET 1: $2.94 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	$2.94 $2.02 $1.74 $1.54 View $1.35 $1.12 $0.972	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 15x5x9mm 10MHz Mn-Zn 120C ESD-R-12M-H KEMET 1: $2.04 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	$2.04 $1.38 $1.21 $1.08 View $0.971 $0.798 $0.736 $0.681	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 6.2mm ESD-R-14A KEMET 1: $1.24 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	$1.24 $0.864 $0.746 $0.662 View $0.586 $0.494 $0.428 $0.397 $0.377	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 48.5x26x16mm Mn-Zn Coated ESD-R-47-P KEMET 1: $18.33 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	$18.33 $11.51 $9.76 $8.76 View $8.57 $8.04	Min.: 1 Mult.: 1
Ferrite Clamp On Cores 31.5x13x38mm Ni-Zn Snap-on ESD-SR-250G KEMET 1: $12.25 241In Stock	Mfr. Part # ESD-SR-250G Mouser Part # 80-ESD-SR-250G	KEMET	Ferrite Clamp On Cores 31.5x13x38mm Ni-Zn Snap-on Learn More about KEMET emi cores	Datasheet	241In Stock	$12.25 $8.27 $6.96 $5.80 View $5.52 $5.17	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 19x10.7x5.3mm Ni-Zn Coated ESD-R-19E-1 KEMET 1: $5.63 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	$5.63 $3.86 $3.28 $2.62 View $2.25 $2.07	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 8.8mm ESD-R-19B KEMET 1: $4.10 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	$4.10 $2.82 $2.42 $2.13 View $1.86 $1.54 $1.44	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 29x12.7x16mm 300MHz Ni-Zn 120C ESD-R-25N-H KEMET 1: $4.95 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	$4.95 $3.41 $2.89 $2.53 View $2.20 $1.93 $1.90 $1.79	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 10.5mm ESD-R-15C KEMET 1: $1.89 100In Stock 800Expected 2027-04-13	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 2027-04-13	$1.89 $1.31 $1.12 $0.992 View $0.887 $0.717 $0.642	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 61x33.2x25mm 300MHz Ni-Zn 120C ESD-R-57N-H KEMET 1: $31.72 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	$31.72 $20.06 $17.55 $16.99 $15.93	Min.: 1 Mult.: 1
Ferrite Clamp On Cores Mn-Zn HR1 Round Snap On 500MHz 85C 7x37.4x19.6x20.3mm ESD-SR-190736X-R1 KEMET 1: $5.56 924In Stock	Mfr. Part # ESD-SR-190736X-R1 Mouser Part # 80-ESD-SR-190736X-R1	KEMET	Ferrite Clamp On Cores Mn-Zn HR1 Round Snap On 500MHz 85C 7x37.4x19.6x20.3mm Learn More about KEMET emi cores	Datasheet	924In Stock	$5.56 $3.82 $3.24 $2.85 View $2.48 $2.35	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1 ESD-R-220814XH-R1 KEMET 1: $3.27 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	$3.27 $2.25 $1.93 $1.70 View $1.48 $1.26	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings Bare,Toroidal Mn-Zn Low Frequency AM Band 150kHz Ring High permeability 10H ESD-R-25SH KEMET 1: $3.67 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	$3.67 $2.53 $2.16 $1.90 View $1.80 $1.67 $1.66	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings Toroidal,Mn-Zn Low Frequency AM Band 150kHz Ring High permeability S15H ESD-R-25SR KEMET 1: $6.49 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	$6.49 $4.45 $3.77 $3.31 View $2.87 $2.82	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings Coated Toroidal Mn-Zn Low Frequency AM Band 150kHz Ring High permeability S15H ESD-R-25SR-P KEMET 1: $8.22 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	$8.22 $5.60 $4.74 $4.23 View $4.19 $4.18 $4.15	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1 ESD-R-291216XH-R1 KEMET 1: $4.61 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	$4.61 $3.18 $2.71 $2.38 View $2.07 $1.89	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings Toroidal w/case Nanocrystal Low Frequency 150kHz Ring -40/+120C UL94 V-0 ESD-R-412119H-NC23 KEMET 1: $25.60 79In Stock 120Expected 2027-04-27	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 2027-04-27	$25.60 $16.91 $15.94 $15.93	Min.: 1 Mult.: 1

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