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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 (GBP) Filter the results in the table by unit price based on your quantity.	Qty.	Product Type	Product
Ferrite Toroids / Ferrite Rings Toroidal w/case Nanocrystal Low Frequency 150kHz Ring -40/+120C UL94 V-0 ESD-R-412119H-NC23 KEMET 1: £13.35 79In 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	79In Stock 120Expected 27/04/2027	£13.35 £8.82 £8.31 £8.30	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	EMI Cores
Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1 ESD-R-421617XH-R1 KEMET 1: £4.35 226In Stock	Mfr. Part No. ESD-R-421617XH-R1 Mouser Part No 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	£4.35 £2.96 £2.50 £2.18 £1.96	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	EMI Cores
Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal,Mn-Zn -40/+120C UL94 V-0 HR1 ESD-R-512419XH-R1 KEMET 1: £6.13 78In Stock	Mfr. Part No. ESD-R-512419XH-R1 Mouser Part No 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	£6.13 £4.14 £3.47 £3.02 £2.94	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	EMI Cores
Ferrite Toroids / Ferrite Rings High Heat Resistance with Case Toroidal Mn-Zn -40/+120C UL94 V-0 HR1 ESD-R-613325XH-R1 KEMET 1: £15.42 70In Stock	Mfr. Part No. ESD-R-613325XH-R1 Mouser Part No 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	£15.42 £10.09 £9.72 £9.71	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	EMI Cores
Ferrite Clamp On Cores Mn-Zn HR1 Round Snap On 500MHz 85C 5x28x14.4x14.2mm ESD-SR-130527X-R1 KEMET 1: £2.05 1,206In Stock	Mfr. Part No. ESD-SR-130527X-R1 Mouser Part No 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	1,206In Stock	£2.05 £1.42 £1.20 £1.07 View £0.934 £0.818	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	EMI Cores
Ferrite Clamp On Cores Mn-Zn HR1 Round Snap On 500MHz 85C 6x33x16x16.4mm ESD-SR-150632X-R1 KEMET 1: £2.23 996In Stock	Mfr. Part No. ESD-SR-150632X-R1 Mouser Part No 80-ESD-SR-150632X-R1	KEMET	Ferrite Clamp On Cores Mn-Zn HR1 Round Snap On 500MHz 85C 6x33x16x16.4mm Learn More about KEMET emi cores	Datasheet	996In Stock	£2.23 £1.54 £1.31 £1.15 View £1.00 £0.899	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	EMI Cores
Ferrite Clamp On Cores Mn-Zn HR1 Round Snap On 500MHz 85C 9x39x20.2x20mm ESD-SR-190938X-R1 KEMET 1: £2.91 685In Stock	Mfr. Part No. ESD-SR-190938X-R1 Mouser Part No 80-ESD-SR-190938X-R1	KEMET	Ferrite Clamp On Cores Mn-Zn HR1 Round Snap On 500MHz 85C 9x39x20.2x20mm Learn More about KEMET emi cores	Datasheet	685In Stock	£2.91 £2.00 £1.69 £1.48 View £1.29 £1.23	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	EMI Cores
Ferrite Cable Cores Split Core Flat 25.4mm Cable ESD-FPD-16 KEMET 1: £5.22 906In Stock	Mfr. Part No. ESD-FPD-16 Mouser Part No 80-ESD-FPD-16	KEMET	Ferrite Cable Cores Split Core Flat 25.4mm Cable Learn More about KEMET Kemet EMI Cores	Datasheet	906In Stock	£5.22 £3.54 £2.99 £2.60 £2.44	Min.: 1 Mult.: 1	Ferrite Cable Cores	Flat Ribbon Cable Cores Split
Ferrite Toroids / Ferrite Rings 10mm ESD-R-19S KEMET 1: £1.49 2,294In Stock 960Expected 29/12/2026	Mfr. Part No. ESD-R-19S Mouser Part No 80-ESD-R-19S	KEMET	Ferrite Toroids / Ferrite Rings 10mm Learn More about KEMET emi cores	Datasheet	2,294In Stock 960Expected 29/12/2026	£1.49 £1.04 £0.882 £0.78 View £0.684 £0.563	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids
Ferrite Toroids / Ferrite Rings 25.5mm ESD-R-47 KEMET 1: £5.05 688In Stock	Mfr. Part No. ESD-R-47 Mouser Part No 80-ESD-R-47	KEMET	Ferrite Toroids / Ferrite Rings 25.5mm Learn More about KEMET emi cores	Datasheet	688In Stock	£5.05 £3.02 £2.63 £2.42 £2.34	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids
Ferrite Clamp On Cores 6x21x16.5mm Ni-Zn 65C ESD-SR-100 KEMET 1: £1.80 3,685In 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	3,685In Stock 2,070Expected 25/12/2026	£1.80 £1.26 £1.07 £1.02 View £0.882 £0.811 £0.711	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Ferrite Clamp On Cores
Ferrite Clamp On Cores 6x33x16.4mm Ni-Zn 65C ESD-SR-120 KEMET 1: £2.44 1,331In Stock 4,900Expected 12/04/2027	Mfr. Part No. ESD-SR-120 Mouser Part No 80-ESD-SR-120	KEMET	Ferrite Clamp On Cores 6x33x16.4mm Ni-Zn 65C Learn More about KEMET emi cores	Datasheet	1,331In Stock 4,900Expected 12/04/2027	£2.44 £1.68 £1.42 £1.26 View £1.10 £0.986	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Ferrite Clamp On Cores
Ferrite Clamp On Cores 13x38x31.6mm Ni-Zn 65C ESD-SR-250 KEMET 1: £6.84 995In Stock 1,320Expected 14/12/2026	Mfr. Part No. ESD-SR-250 Mouser Part No 80-ESD-SR-250	KEMET	Ferrite Clamp On Cores 13x38x31.6mm Ni-Zn 65C Learn More about KEMET emi cores	Datasheet	995In Stock 1,320Expected 14/12/2026	£6.84 £4.66 £3.95 £3.32 £3.08	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Ferrite Clamp On Cores
Ferrite Cable Cores Ferrite Bead Core EMI 2.4mm B-20L-48B KEMET 1: £0.217 13,639In Stock 80,000On Order	Mfr. Part No. B-20L-48B Mouser Part No 80-B-20L-48B	KEMET	Ferrite Cable Cores Ferrite Bead Core EMI 2.4mm Learn More about KEMET Kemet EMI Cores	Datasheet	13,639In Stock 80,000On Order On Order Ship Dates Mfr. No: B-20L-48B Stock: 13,639 Can Dispatch Immediately On Order: 40,000 Expected 19/11/2026 40,000 Expected 09/02/2027 Factory Lead Time: 29 Weeks	£0.217 £0.12 £0.091 £0.08 View £0.071 £0.06	Min.: 1 Mult.: 1	Ferrite Cable Cores	Round Cable Cores Solid
Ferrite Cable Cores 4.8x2.4mm 300MHz Ni-Zn Bare B-20L-48B-L KEMET 1: £0.196 8,845In Stock 35,000Expected 10/05/2027	Mfr. Part No. B-20L-48B-L Mouser Part No 80-B-20L-48B-L	KEMET	Ferrite Cable Cores 4.8x2.4mm 300MHz Ni-Zn Bare Learn More about KEMET emi cores	Datasheet	8,845In Stock 35,000Expected 10/05/2027	£0.196 £0.137 £0.113 £0.094 View £0.081 £0.074 £0.065 £0.052 £0.051	Min.: 1 Mult.: 1	Ferrite Cable Cores	Round Cable Cores Solid
Ferrite Cable Cores Ferrite Bead Core EMI 4.8mm B-20L-95B KEMET 1: £0.555 4,515In Stock 15,000Expected 08/03/2027	Mfr. Part No. B-20L-95B Mouser Part No 80-B-20L-95B	KEMET	Ferrite Cable Cores Ferrite Bead Core EMI 4.8mm Learn More about KEMET Kemet EMI Cores	Datasheet	4,515In Stock 15,000Expected 08/03/2027	£0.555 £0.388 £0.335 £0.299 View £0.265 £0.223 £0.196 £0.19 £0.179	Min.: 1 Mult.: 1	Ferrite Cable Cores	Round Cable Cores Solid
Ferrite Cable Cores Split Core Flat 25.4mm Cable ESD-FPD-16-1 KEMET 1: £5.43 60In Stock 1,600On Order	Mfr. Part No. ESD-FPD-16-1 Mouser Part No 80-ESD-FPD-16-1	KEMET	Ferrite Cable Cores Split Core Flat 25.4mm Cable Learn More about KEMET emi cores	Datasheet	60In Stock 1,600On Order On Order Ship Dates Mfr. No: ESD-FPD-16-1 Stock: 60 Can Dispatch Immediately On Order: 800 Expected 02/11/2026 800 Expected 18/01/2027 Factory Lead Time: 23 Weeks	£5.43 £3.68 £3.10 £2.70 £2.50	Min.: 1 Mult.: 1	Ferrite Cable Cores	Flat Ribbon Cable Cores Split
Ferrite Cable Cores Split Core Flat 48.3mm Cable ESD-FPD-34 KEMET 1: £6.36 248In Stock 240Expected 18/01/2027	Mfr. Part No. ESD-FPD-34 Mouser Part No 80-ESD-FPD-34	KEMET	Ferrite Cable Cores Split Core Flat 48.3mm Cable Learn More about KEMET emi cores	Datasheet	248In Stock 240Expected 18/01/2027	£6.36 £4.29 £3.71 £3.13 £2.99	Min.: 1 Mult.: 1	Ferrite Cable Cores	Flat Ribbon Cable Cores Split
Ferrite Cable Cores 68.6x2mm Split Core Ni-Zn for Flat Cable ESD-FPD-50 KEMET 1: £7.63 124In Stock	Mfr. Part No. ESD-FPD-50 Mouser Part No 80-ESD-FPD-50	KEMET	Ferrite Cable Cores 68.6x2mm Split Core Ni-Zn for Flat Cable Learn More about KEMET emi cores	Datasheet	124In Stock	£7.63 £5.12 £4.30 £3.81	Min.: 1 Mult.: 1	Ferrite Cable Cores	Flat Ribbon Cable Cores Split
Ferrite Cable Cores Split Core Flat 68.6mm Cable ESD-FPD-50-1 KEMET 1: £7.87 123In Stock	Mfr. Part No. ESD-FPD-50-1 Mouser Part No 80-ESD-FPD-50-1	KEMET	Ferrite Cable Cores Split Core Flat 68.6mm Cable Learn More about KEMET emi cores	Datasheet	123In Stock	£7.87 £5.29 £4.43 £3.95	Min.: 1 Mult.: 1	Ferrite Cable Cores	Flat Ribbon Cable Cores Split
Ferrite Toroids / Ferrite Rings 12x7x15mm Ni-Zn Coated ESD-R-12CM KEMET 1: £1.02 167In Stock 1,500Expected 02/02/2027	Mfr. Part No. ESD-R-12CM Mouser Part No 80-ESD-R-12CM	KEMET	Ferrite Toroids / Ferrite Rings 12x7x15mm Ni-Zn Coated Learn More about KEMET emi cores	Datasheet	167In Stock 1,500Expected 02/02/2027	£1.02 £0.71 £0.608 £0.539 View £0.474 £0.388 £0.349 £0.344	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids
Ferrite Toroids / Ferrite Rings 7.3mm ESD-R-12E KEMET 1: £0.571 3,000In Stock	Mfr. Part No. ESD-R-12E Mouser Part No 80-ESD-R-12E	KEMET	Ferrite Toroids / Ferrite Rings 7.3mm Learn More about KEMET emi cores	Datasheet	3,000In Stock	£0.571 £0.396 £0.344 £0.306 View £0.271 £0.229 £0.20 £0.187 £0.178	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids
Ferrite Toroids / Ferrite Rings 15x5x9mm 300MHz Ni-Zn 120C ESD-R-12N-H KEMET 1: £1.10 257In Stock	Mfr. Part No. ESD-R-12N-H Mouser Part No 80-ESD-R-12N-H	KEMET	Ferrite Toroids / Ferrite Rings 15x5x9mm 300MHz Ni-Zn 120C Learn More about KEMET emi cores	Datasheet	257In Stock	£1.10 £0.773 £0.66 £0.585 View £0.514 £0.413 £0.397	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids
Ferrite Toroids / Ferrite Rings 7mm ESD-R-14C KEMET 1: £0.39 2,603In Stock 6,000Expected 02/02/2027	Mfr. Part No. ESD-R-14C Mouser Part No 80-ESD-R-14C	KEMET	Ferrite Toroids / Ferrite Rings 7mm Learn More about KEMET emi cores	Datasheet	2,603In Stock 6,000Expected 02/02/2027	£0.39 £0.274 £0.238 £0.19 View £0.189 £0.16 £0.135 £0.122 £0.12	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids
Ferrite Toroids / Ferrite Rings 7mm ESD-R-14C-2 KEMET 1: £0.503 1,140In Stock	Mfr. Part No. ESD-R-14C-2 Mouser Part No 80-ESD-R-14C-2	KEMET	Ferrite Toroids / Ferrite Rings 7mm Learn More about KEMET emi cores	Datasheet	1,140In Stock	£0.503 £0.399 £0.344 £0.306 View £0.271 £0.229 £0.20 £0.196 £0.184	Min.: 1 Mult.: 1	Ferrite Toroids / Ferrite Rings	Toroids

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