Passive Components – Mouser Denmark

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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 (DKK) Filter the results in the table by unit price based on your quantity.	Qty.
Ferrite Toroids / Ferrite Rings 14mm ESD-R-25D KEMET 1: 15,82 kr. 600Expected 21/01/2027	Mfr. Part No. ESD-R-25D Mouser Part No 80-ESD-R-25D	KEMET	Ferrite Toroids / Ferrite Rings 14mm Learn More about KEMET emi cores	Datasheet	600Expected 21/01/2027	15,82 kr. 10,74 kr. 9,18 kr. 8,06 kr. View 7,12 kr. 5,89 kr.	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 13.9mm ESD-R-25D-B KEMET 1: 16,93 kr. 419Expected 22/04/2027	Mfr. Part No. ESD-R-25D-B Mouser Part No 80-ESD-R-25D-B	KEMET	Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 13.9mm Learn More about KEMET emi cores	Datasheet	419Expected 22/04/2027	16,93 kr. 11,71 kr. 9,92 kr. 8,73 kr. View 7,61 kr. 6,74 kr.	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 25.5mm ESD-R-47B KEMET 1: 54,98 kr. 90Expected 29/12/2026	Mfr. Part No. ESD-R-47B Mouser Part No 80-ESD-R-47B	KEMET	Ferrite Toroids / Ferrite Rings Ferrite Bead Incased EMI 25.5mm Learn More about KEMET emi cores	Datasheet	90Expected 29/12/2026	54,98 kr. 39,24 kr. 34,17 kr. 31,26 kr.	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 57x36x20mm Ni-Zn Bare ESD-R-57D KEMET 1: 202,32 kr. 20Expected 25/03/2027	Mfr. Part No. ESD-R-57D Mouser Part No 80-ESD-R-57D	KEMET	Ferrite Toroids / Ferrite Rings 57x36x20mm Ni-Zn Bare Learn More about KEMET emi cores	Datasheet	20Expected 25/03/2027	202,32 kr. 122,19 kr. 117,94 kr.	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 32.4mm ESD-R-57D-1 KEMET 1: 188,81 kr. 31Expected 25/03/2027	Mfr. Part No. ESD-R-57D-1 Mouser Part No 80-ESD-R-57D-1	KEMET	Ferrite Toroids / Ferrite Rings 32.4mm Learn More about KEMET emi cores	Datasheet	31Expected 25/03/2027	188,81 kr. 122,64 kr. 114,36 kr.	Min.: 1 Mult.: 1
Ferrite Clamp On Cores Mn-Zn HR1 Round Snap On 500MHz 85C 6x21x16.5x16.5mm ESD-SR-160620X-R1 KEMET 1: 14,85 kr. 896Expected 24/12/2026	Mfr. Part No. ESD-SR-160620X-R1 Mouser Part No 80-ESD-SR-160620X-R1	KEMET	Ferrite Clamp On Cores Mn-Zn HR1 Round Snap On 500MHz 85C 6x21x16.5x16.5mm Learn More about KEMET emi cores	Datasheet	896Expected 24/12/2026	14,85 kr. 9,92 kr. 8,50 kr. 7,45 kr. View 6,54 kr. 5,81 kr. 5,59 kr.	Min.: 1 Mult.: 1
Ferrite Cable Cores 4.8x2.4mm 300MHz Ni-Zn Coated B-20L-48B-A KEMET 30.000: 4,44 kr. Non-Stocked Lead-Time 29 Weeks	Mfr. Part No. B-20L-48B-A Mouser Part No 80-B-20L-48B-A	KEMET	Ferrite Cable Cores 4.8x2.4mm 300MHz Ni-Zn Coated Learn More about KEMET emi cores	Datasheet	Non-Stocked Lead-Time 29 Weeks	4,44 kr.	Min.: 30.000 Mult.: 5.000
Ferrite Cable Cores Split Core Flat 56mm Cable ESD-FPD-40 KEMET 1: 60,35 kr. Non-Stocked Lead-Time 23 Weeks	Mfr. Part No. ESD-FPD-40 Mouser Part No 80-ESD-FPD-40	KEMET	Ferrite Cable Cores Split Core Flat 56mm Cable Learn More about KEMET emi cores	Datasheet	Non-Stocked Lead-Time 23 Weeks	60,35 kr. 40,66 kr. 34,17 kr. 29,77 kr. 28,65 kr.	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 9mm ESD-R-19 KEMET 1: 11,12 kr. Non-Stocked Lead-Time 23 Weeks	Mfr. Part No. ESD-R-19 Mouser Part No 80-ESD-R-19	KEMET	Ferrite Toroids / Ferrite Rings 9mm Learn More about KEMET emi cores	Datasheet	Non-Stocked Lead-Time 23 Weeks	11,12 kr. 7,76 kr. 6,61 kr. 5,86 kr. View 5,15 kr. 3,96 kr.	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 26x14x15mm Ni-Zn Case and Tape ESD-R-25D-1 KEMET 1: 16,71 kr. Non-Stocked Lead-Time 23 Weeks	Mfr. Part No. ESD-R-25D-1 Mouser Part No 80-ESD-R-25D-1	KEMET	Ferrite Toroids / Ferrite Rings 26x14x15mm Ni-Zn Case and Tape Learn More about KEMET emi cores	Datasheet	Non-Stocked Lead-Time 23 Weeks	16,71 kr. 11,56 kr. 9,85 kr. 8,58 kr. View 7,53 kr. 6,61 kr.	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 25.3x14.8x12.3mm Mn-Zn Coated ESD-R-25MK KEMET 1: 22,08 kr. Non-Stocked Lead-Time 23 Weeks	Mfr. Part No. ESD-R-25MK Mouser Part No 80-ESD-R-25MK	KEMET	Ferrite Toroids / Ferrite Rings 25.3x14.8x12.3mm Mn-Zn Coated Learn More about KEMET emi cores	Datasheet	Non-Stocked Lead-Time 23 Weeks	22,08 kr. 15,22 kr. 12,91 kr. 11,34 kr. View 9,85 kr. 9,18 kr.	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 39.5x18x14mm Mn-Zn Coated ESD-R-38-P KEMET 1: 61,32 kr. Non-Stocked Lead-Time 23 Weeks	Mfr. Part No. ESD-R-38-P Mouser Part No 80-ESD-R-38-P	KEMET	Ferrite Toroids / Ferrite Rings 39.5x18x14mm Mn-Zn Coated Learn More about KEMET emi cores	Datasheet	Non-Stocked Lead-Time 23 Weeks	61,32 kr. 41,33 kr. 31,41 kr. 30,81 kr. 30,29 kr.	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 17.5mm ESD-R-38C-1 KEMET 1: 49,46 kr. Non-Stocked Lead-Time 23 Weeks	Mfr. Part No. ESD-R-38C-1 Mouser Part No 80-ESD-R-38C-1	KEMET	Ferrite Toroids / Ferrite Rings 17.5mm Learn More about KEMET emi cores	Datasheet	Non-Stocked Lead-Time 23 Weeks	49,46 kr. 33,57 kr. 28,57 kr. 24,69 kr. 22,90 kr.	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 51x24.4x19mm 300MHz Ni-Zn 120C ESD-R-47N-H KEMET 1: 64,53 kr. Non-Stocked Lead-Time 23 Weeks	Mfr. Part No. ESD-R-47N-H Mouser Part No 80-ESD-R-47N-H	KEMET	Ferrite Toroids / Ferrite Rings 51x24.4x19mm 300MHz Ni-Zn 120C Learn More about KEMET emi cores	Datasheet	Non-Stocked Lead-Time 23 Weeks	64,53 kr. 41,03 kr. 35,29 kr. 31,11 kr. View 29,09 kr. 29,02 kr. 28,35 kr. 28,20 kr.	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 59x34x21mm Mn-Zn Coated ESD-R-57-P KEMET 1: 135,70 kr. Non-Stocked Lead-Time 23 Weeks	Mfr. Part No. ESD-R-57-P Mouser Part No 80-ESD-R-57-P	KEMET	Ferrite Toroids / Ferrite Rings 59x34x21mm Mn-Zn Coated Learn More about KEMET emi cores	Datasheet	Non-Stocked Lead-Time 23 Weeks	135,70 kr. 92,13 kr. 84,30 kr. 79,08 kr. View 78,26 kr. 77,81 kr. 77,36 kr. 77,29 kr.	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 61x33.2x25mm 10MHz Mn-Zn 120C ESD-R-57M-H KEMET 1: 143,90 kr. Non-Stocked Lead-Time 23 Weeks	Mfr. Part No. ESD-R-57M-H Mouser Part No 80-ESD-R-57M-H	KEMET	Ferrite Toroids / Ferrite Rings 61x33.2x25mm 10MHz Mn-Zn 120C Learn More about KEMET emi cores	Datasheet	Non-Stocked Lead-Time 23 Weeks	143,90 kr. 88,18 kr. 78,48 kr.	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 57x36x20mm 150kHz Mn-Zn 85C ESD-R-57SR KEMET 60: 96,23 kr. Non-Stocked Lead-Time 23 Weeks	Mfr. Part No. ESD-R-57SR Mouser Part No 80-ESD-R-57SR	KEMET	Ferrite Toroids / Ferrite Rings 57x36x20mm 150kHz Mn-Zn 85C Learn More about KEMET emi cores	Datasheet	Non-Stocked Lead-Time 23 Weeks	96,23 kr.	Min.: 60 Mult.: 15

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EMI Cores

Types of Passive Components