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 15.5x18.5mm 300MHz Mn-Zn 85C ESD-SR-S10M KEMET 1: $6.34 747In 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	747In Stock	$6.34 $3.99 $3.48 $2.70 $2.69	Min.: 1 Mult.: 1 Max.: 3,200
Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 17.9mm ESD-R-38D-B KEMET 1: $12.21 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	$12.21 $7.66 $6.63 $5.98 $5.97	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 $0.247 $0.187 $0.155 View $0.14 $0.139 $0.113 $0.112	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 $1.57 $1.39 $1.01 $0.878	Min.: 1 Mult.: 1
Ferrite Clamp On Cores 6x33x16.4mm Ni-Zn 65C ESD-SR-120 KEMET 1: $4.21 4,340In Stock	Mfr. Part # ESD-SR-120 Mouser Part # 80-ESD-SR-120	KEMET	Ferrite Clamp On Cores 6x33x16.4mm Ni-Zn 65C Learn More about KEMET emi cores	Datasheet	4,340In Stock	$4.21 $2.70 $2.48 $1.77 View $1.76 $1.68	Min.: 1 Mult.: 1 Max.: 2,800
Ferrite Clamp On Cores 53x19mm 10MHz Mn-Zn 85C ESD-SR-S47M KEMET 1: $17.93 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	$17.93 $10.53 $8.78 $8.76	Min.: 1 Mult.: 1
Ferrite Cable Cores Ferrite Bead Core EMI 1mm B-20L-25 KEMET 1: $0.26 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	$0.26 $0.165 $0.129 $0.121 View $0.116 $0.096 $0.095	Min.: 1 Mult.: 1 Max.: 60,000
Ferrite Cable Cores Ferrite Bead Core EMI 1.6mm B-20L-44 KEMET 1: $0.195 48,566In 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	48,566In Stock	$0.195 $0.138 $0.125 $0.118 View $0.111 $0.101 $0.091	Min.: 1 Mult.: 1 Max.: 20,000
Ferrite Cable Cores 56x2mm Split Core Ni-Zn for Flat Cable ESD-FPD-40-1 KEMET 1: $12.65 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	$12.65 $7.18 $6.21 $5.53 View $5.51 $5.45 Quote	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 8.8mm ESD-R-19B KEMET 1: $3.71 673In 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	673In Stock	$3.71 $2.18 $1.92 $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 $2.61 $2.29 $1.64 $1.61	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 61x33.2x25mm 300MHz Ni-Zn 120C ESD-R-57N-H KEMET 1: $27.00 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	$27.00 $14.89 $14.38 Quote Quote	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 $0.962 $0.692 $0.628 View $0.582 $0.576	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 19x10.7x5.3mm Ni-Zn Coated ESD-R-19E-1 KEMET 1: $5.08 615In 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	615In Stock	$5.08 $2.96 $2.37 $1.87	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 942In 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	942In Stock	$5.02 $2.93 $2.57 $2.46 View $2.44 $2.28	Min.: 1 Mult.: 1 Max.: 1,600
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 $1.76 $1.55 $1.34 View $1.33 $1.25 $1.21 $1.17	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 682In 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		682In Stock	$3.32 $1.95 $1.72 $1.70 View $1.66 $1.57	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 $3.41 $2.99 $2.89 View $2.87 $2.73 $2.67 $2.60 Quote	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 $4.28 $3.82 $3.81	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: $3.97 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	$3.97 $2.33 $2.04 $1.83 $1.82	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 83In 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	83In Stock 120Expected 4/27/2027	$23.11 $14.56	Min.: 1 Mult.: 1 Max.: 480
Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1 ESD-R-421617XH-R1 KEMET 1: $7.53 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	$7.53 $4.33 $3.78 $3.61 View $3.60 $3.55 $3.43 Quote	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal,Mn-Zn -40/+120C UL94 V-0 HR1 ESD-R-512419XH-R1 KEMET 1: $10.53 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	$10.53 $6.02 $5.23 $5.21 View $5.20 Quote	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1 ESD-R-613325XH-R1 KEMET 1: $26.55 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	$26.55 $17.58 $17.56	Min.: 1 Mult.: 1
Ferrite Clamp On Cores Mn-Zn HR1 Round Snap On 500MHz 85C 5x28x14.4x14.2mm ESD-SR-130527X-R1 KEMET 1: $3.55 1,210In Stock	Mfr. Part # ESD-SR-130527X-R1 Mouser Part # 80-ESD-SR-130527X-R1	KEMET	Ferrite Clamp On Cores Mn-Zn HR1 Round Snap On 500MHz 85C 5x28x14.4x14.2mm Learn More about KEMET emi cores	Datasheet	1,210In Stock	$3.55 $2.09 $1.85 $1.65 View $1.56 $1.55 $1.48 $1.43 $1.42	Min.: 1 Mult.: 1

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