Passive Components – Mouser Mexico

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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 (USD) 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: $18.17 372In 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	372In Stock	$18.17 $10.54 $9.05 $8.78	Min.: 1 Mult.: 1
Ferrite Clamp On Cores 15.5x18.5mm 300MHz Mn-Zn 85C ESD-SR-S10M KEMET 1: $6.41 734In 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	734In Stock	$6.41 $4.39 $3.73 $3.28 View $2.85 $2.70 $2.69	Min.: 1 Mult.: 1
Ferrite Cable Cores Ferrite Bead Core EMI 1mm B-20L-25 KEMET 1: $0.286 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	$0.286 $0.207 $0.176 $0.151 View $0.133 $0.131 $0.117 $0.096	Min.: 1 Mult.: 1
Ferrite Cable Cores Ferrite Bead Core EMI 1.6mm B-20L-44 KEMET 1: $0.247 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	$0.247 $0.187 $0.164 $0.146 View $0.133 $0.12 $0.108 $0.091	Min.: 1 Mult.: 1
Ferrite Cable Cores 56x2mm Split Core Ni-Zn for Flat Cable ESD-FPD-40-1 KEMET 1: $12.74 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	$12.74 $8.58 $7.19 $6.23 $5.53	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 17.9mm ESD-R-38D-B KEMET 1: $12.83 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	$12.83 $9.15 $7.66 $6.63 View $5.98 $5.97	Min.: 1 Mult.: 1
Ferrite Clamp On Cores 6x18.5x14mm Ni-Zn 65C ESD-SR-S10 KEMET 1: $3.51 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	$3.51 $2.07 $1.82 $1.33 View $1.21 $1.14	Min.: 1 Mult.: 1
Ferrite Cable Cores Ferrite Bead Core EMI 0.8mm B-20L-34 KEMET 1: $0.455 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	$0.455 $0.319 $0.247 $0.22 View $0.187 $0.157 $0.142 $0.113	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 6mm ESD-R-12D KEMET 1: $2.65 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	$2.65 $1.82 $1.57 $1.39 View $1.22 $1.01 $0.878	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 15x5x9mm 10MHz Mn-Zn 120C ESD-R-12M-H KEMET 1: $1.85 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	$1.85 $1.25 $1.09 $0.976 View $0.876 $0.72 $0.664 $0.615	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 6.2mm ESD-R-14A KEMET 1: $1.12 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	$1.12 $0.78 $0.673 $0.598 View $0.529 $0.446 $0.386 $0.359 $0.341	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 48.5x26x16mm Mn-Zn Coated ESD-R-47-P KEMET 1: $16.55 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	$16.55 $10.39 $8.81 $7.90 View $7.74 $7.25	Min.: 1 Mult.: 1
Ferrite Clamp On Cores 31.5x13x38mm Ni-Zn Snap-on ESD-SR-250G KEMET 1: $11.06 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	$11.06 $7.46 $6.28 $5.24 View $4.98 $4.67	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 19x10.7x5.3mm Ni-Zn Coated ESD-R-19E-1 KEMET 1: $5.08 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	$5.08 $3.48 $2.96 $2.37 View $2.03 $1.87	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 8.8mm ESD-R-19B KEMET 1: $3.71 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	$3.71 $2.55 $2.18 $1.92 View $1.68 $1.39 $1.30	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 29x12.7x16mm 300MHz Ni-Zn 120C ESD-R-25N-H KEMET 1: $4.47 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	$4.47 $3.08 $2.61 $2.29 View $1.99 $1.74 $1.72 $1.61	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 10.5mm ESD-R-15C KEMET 1: $1.70 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	$1.70 $1.18 $1.01 $0.896 View $0.801 $0.647 $0.58	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 61x33.2x25mm 300MHz Ni-Zn 120C ESD-R-57N-H KEMET 1: $27.56 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	$27.56 $18.43 $17.25 $14.38	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: $5.02 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	$5.02 $3.45 $2.93 $2.57 View $2.24 $2.12	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: $2.95 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	$2.95 $2.03 $1.74 $1.53 View $1.34 $1.14	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: $3.32 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	$3.32 $2.29 $1.95 $1.72 View $1.63 $1.51 $1.50	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: $5.86 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	$5.86 $4.02 $3.41 $2.99 View $2.59 $2.55	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: $7.42 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	$7.42 $5.06 $4.28 $3.82 View $3.78 $3.77 $3.74	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: $4.16 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	$4.16 $2.87 $2.44 $2.15 View $1.87 $1.70	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: $23.11 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	$23.11 $15.26 $14.39 $14.38	Min.: 1 Mult.: 1

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