Passive Components – Mouser United Kingdom

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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.
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 £1.31 £1.15 £1.05 View £0.978 £0.969 £0.943 £0.917 £0.899	Min.: 1 Mult.: 1
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 £1.69 £1.48 £1.42 View £1.32 £1.28 £1.26 Quote	Min.: 1 Mult.: 1
Ferrite Cable Cores Ferrite Bead Core EMI 2.4mm B-20L-48B KEMET 1: £0.217 22,121In 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	22,121In Stock 80,000On Order On Order Ship Dates Mfr. No: B-20L-48B Stock: 22,121 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 £0.068 £0.065	Min.: 1 Mult.: 1 Max.: 20,000
Ferrite Cable Cores Split Core Flat 25.4mm Cable ESD-FPD-16 KEMET 1: £5.21 911In 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	911In Stock	£5.21 £2.99 £2.60 £2.47 £2.44	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 10mm ESD-R-19S KEMET 1: £1.49 2,314In Stock 960Expected 26/11/2026	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	2,314In Stock 960Expected 26/11/2026	£1.49 £0.882 £0.788 £0.657 View £0.617 £0.581 £0.563	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 25.5mm ESD-R-47 KEMET 1: £5.03 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	£5.03 £2.64 £2.42 £2.34	Min.: 1 Mult.: 1
Ferrite Clamp On Cores 9x39x20mm Ni-Zn 65C ESD-SR-160 KEMET 1: £3.28 5,314In Stock	Mfr. Part No. ESD-SR-160 Mouser Part No 80-ESD-SR-160	KEMET	Ferrite Clamp On Cores 9x39x20mm Ni-Zn 65C Learn More about KEMET emi cores	Datasheet	5,314In Stock	£3.28 £1.93 £1.69 £1.53 View £1.43 £1.34	Min.: 1 Mult.: 1
Ferrite Clamp On Cores 13x38x31.6mm Ni-Zn 65C ESD-SR-250 KEMET 1: £6.54 1,170In 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	1,170In Stock 1,320Expected 14/12/2026	£6.54 £4.10 £3.41 £3.35	Min.: 1 Mult.: 1 Max.: 120
Ferrite Clamp On Cores 6x18.5x14mm Ni-Zn 65C ESD-SR-S10 KEMET 1: £2.03 6,180In Stock	Mfr. Part No. ESD-SR-S10 Mouser Part No 80-ESD-SR-S10	KEMET	Ferrite Clamp On Cores 6x18.5x14mm Ni-Zn 65C Learn More about KEMET emi cores	Datasheet	6,180In Stock	£2.03 £1.20 £1.05 £0.766 View £0.759 £0.751	Min.: 1 Mult.: 1
Ferrite Cable Cores 4.8x2.4mm 300MHz Ni-Zn Bare B-20L-48B-L KEMET 1: £0.188 17,205In Stock	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	17,205In Stock	£0.188 £0.102 £0.078 £0.069 View £0.06 £0.058 £0.057	Min.: 1 Mult.: 1 Max.: 20,000
Ferrite Cable Cores Ferrite Bead Core EMI 4.8mm B-20L-95B KEMET 1: £0.555 4,865In 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	4,865In Stock 15,000Expected 08/03/2027	£0.555 £0.299 £0.223 £0.196 View £0.192 £0.191	Min.: 1 Mult.: 1 Max.: 30,000
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 £3.33 £3.06 £2.78 View £2.55 £2.50	Min.: 1 Mult.: 1
Ferrite Cable Cores Split Core Flat 48.3mm Cable ESD-FPD-34 KEMET 1: £6.36 249In 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	249In Stock 240Expected 18/01/2027	£6.36 £4.24 £3.68 £3.50	Min.: 1 Mult.: 1 Max.: 480
Ferrite Cable Cores 68.6x2mm Split Core Ni-Zn for Flat Cable ESD-FPD-50 KEMET 1: £7.43 129In 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	129In Stock	£7.43 £3.97 £3.81	Min.: 1 Mult.: 1
Ferrite Cable Cores Split Core Flat 68.6mm Cable ESD-FPD-50-1 KEMET 1: £7.80 150In 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	150In Stock	£7.80 £4.43 £4.42 £3.95	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 12x7x15mm Ni-Zn Coated ESD-R-12CM KEMET 1: £1.04 217In 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	217In Stock 1,500Expected 02/02/2027	£1.04 £0.549 £0.389 £0.349 £0.344	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 7.3mm ESD-R-12E KEMET 1: £0.653 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	£0.653 £0.358 £0.268 £0.233 View £0.207 £0.178	Min.: 1 Mult.: 1
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 £0.585 £0.413 £0.41 View £0.40 £0.397	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 6.2mm ESD-R-14A KEMET 1: £0.646 4,679In Stock	Mfr. Part No. ESD-R-14A Mouser Part No 80-ESD-R-14A	KEMET	Ferrite Toroids / Ferrite Rings 6.2mm Learn More about KEMET emi cores	Datasheet	4,679In Stock	£0.646 £0.346 £0.258 £0.223 View £0.217 £0.212	Min.: 1 Mult.: 1
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 £0.213 £0.161 £0.141 View £0.122 £0.12	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 7mm ESD-R-14C-2 KEMET 1: £0.548 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	£0.548 £0.306 £0.229 £0.20 View £0.198 £0.197 £0.196	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 10.5mm ESD-R-15C KEMET 1: £1.03 660In Stock	Mfr. Part No. ESD-R-15C Mouser Part No 80-ESD-R-15C	KEMET	Ferrite Toroids / Ferrite Rings 10.5mm Learn More about KEMET emi cores	Datasheet	660In Stock	£1.03 £0.608 £0.449 £0.39 View £0.337 £0.335	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 10.5mm ESD-R-15C-1 KEMET 1: £0.646 210In Stock	Mfr. Part No. ESD-R-15C-1 Mouser Part No 80-ESD-R-15C-1	KEMET	Ferrite Toroids / Ferrite Rings 10.5mm Learn More about KEMET emi cores	Datasheet	210In Stock	£0.646 £0.345 £0.257 £0.246 View £0.245 £0.213 £0.211	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 11.6mm ESD-R-16 KEMET 1: £0.908 1,032In Stock	Mfr. Part No. ESD-R-16 Mouser Part No 80-ESD-R-16	KEMET	Ferrite Toroids / Ferrite Rings 11.6mm Learn More about KEMET emi cores	Datasheet	1,032In Stock	£0.908 £0.481 £0.37 £0.32 View £0.312 £0.274 £0.267	Min.: 1 Mult.: 1
Ferrite Toroids / Ferrite Rings 22x7.7x14mm 10MHz Mn-Zn 120C ESD-R-19M-H KEMET 1: £1.87 380In Stock	Mfr. Part No. ESD-R-19M-H Mouser Part No 80-ESD-R-19M-H	KEMET	Ferrite Toroids / Ferrite Rings 22x7.7x14mm 10MHz Mn-Zn 120C Learn More about KEMET emi cores	Datasheet	380In Stock	£1.87 £1.10 £0.89 £0.834 View £0.796 £0.751 £0.738	Min.: 1 Mult.: 1

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