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28A Ferrite Clamp Filters

Laird 28A Ferrite Clamp Filters are split, snap-on cores in plastic cases for broadband EMI filtering. The 28A series is designed for round cables and wiring harnesses. For retrofit and post-assembly operations, Laird offers a selection of "split" cores that perform similarly to one-piece core designs. The 28A split ferrite cores provide excellent common and differential mode EMI suppression on round cable assemblies. Lightweight plastic snap-on cases provide the secure closure of the split cores onto the cable. The cases are available in black or white with dimensions ranging from 5mm (0.197") to 56.63mm (2.23"). Laird 28A Ferrite Clamp Filters feature an operating temperature range of -40°C to +125°C. Typical impedance ranges from 50Ω to 232Ω at 25MHz, 120Ω to 511Ω at 100MHz, and 230Ω to 627Ω at 300MHz.

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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	Type	Minimum Operating Temperature	Maximum Operating Temperature	Packaging
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 170ohms 100MHz 28A0392-0A2 Laird 1: £1.07 59,972In Stock	Mfr. Part No. 28A0392-0A2 Mouser Part No 875-28A0392-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 170ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	59,972In Stock	£1.07 £0.818 £0.688 £0.62 View £0.545 £0.454 £0.448	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk
Ferrite Clamp On Cores Rnd,Spl,BB,CSNO Snap-on 28A2025-000 Laird 1: £1.94 1,041In Stock	Mfr. Part No. 28A2025-000 Mouser Part No 875-28A2025-000	Laird	Ferrite Clamp On Cores Rnd,Spl,BB,CSNO Snap-on Learn More about Laird 28a ferrite clamp filters	Datasheet	1,041In Stock	£1.94 £1.29 £1.10 £0.978 View £0.849 £0.826 £0.69 £0.689	Min.: 1 Mult.: 1	Ferrite Clamp On Cores				Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 240ohms 100MHz 28A0350-0B2 Laird 1: £1.48 18,464In Stock	Mfr. Part No. 28A0350-0B2 Mouser Part No 875-28A0350-0B2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 240ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	18,464In Stock	£1.48 £1.06 £0.917 £0.818 View £0.728 £0.617	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 572ohms 100MHz 28A0592-0A2 Laird 1: £2.27 26,883In Stock	Mfr. Part No. 28A0592-0A2 Mouser Part No 875-28A0592-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 572ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	26,883In Stock	£2.27 £1.57 £1.19 £1.04 £0.969	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 407ohms 100MHz 28A0593-0A2 Laird 1: £1.98 41,094In Stock 22,464Expected 15/12/2026	Mfr. Part No. 28A0593-0A2 Mouser Part No 875-28A0593-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 407ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	41,094In Stock 22,464Expected 15/12/2026	£1.98 £1.54 £1.35 £1.20 View £1.05 £0.995	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 250ohms 100MHz 28A2029-0A2 Laird 1: £2.11 12,357In Stock	Mfr. Part No. 28A2029-0A2 Mouser Part No 875-28A2029-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 250ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	12,357In Stock	£2.11 £1.82 £1.58 £1.40 View £1.21 £1.06	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 220ohms 100MHz 28A2736-0A2 Laird 1: £1.59 56,143In Stock	Mfr. Part No. 28A2736-0A2 Mouser Part No 875-28A2736-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 220ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	56,143In Stock	£1.59 £1.10 £0.943 £0.834 View £0.727 £0.637	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 183 Ohms 100MHz 28A2307-0A2 Laird 1: £1.59 5,791In Stock	Mfr. Part No. 28A2307-0A2 Mouser Part No 875-28A2307-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 183 Ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	5,791In Stock	£1.59 £1.10 £0.943 £0.834 £0.759	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single			Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 233 Ohms 100MHz 28A2738-0A2 Laird 1: £4.75 3,939In Stock	Mfr. Part No. 28A2738-0A2 Mouser Part No 875-28A2738-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 233 Ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	3,939In Stock	£4.75 £3.25 £2.67 £2.40 View £2.08 £2.00	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single			Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 425ohms 100MHz 28A5131-0A2 Laird 1: £18.32 423In Stock 846Expected 04/11/2026	Mfr. Part No. 28A5131-0A2 Mouser Part No 875-28A5131-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 425ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	423In Stock 846Expected 04/11/2026	£18.32 £11.86 £11.01	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 227ohms 100MHz 28A0434-0A2 Laird 1: £1.63 2,989In Stock 2,816Expected 28/12/2026	Mfr. Part No. 28A0434-0A2 Mouser Part No 875-28A0434-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 227ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	2,989In Stock 2,816Expected 28/12/2026	£1.63 £1.13 £0.969 £0.856 £0.78	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER WHT 240ohms 100MHz 28A0640-0A0 Laird 1: £2.42 2,183In Stock 4,500Expected 15/12/2026	Mfr. Part No. 28A0640-0A0 Mouser Part No 875-28A0640-0A0	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER WHT 240ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	2,183In Stock 4,500Expected 15/12/2026	£2.42 £1.67 £1.42 £1.26 View £1.08 £1.00 £0.952	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 240ohms 100MHz 28A0640-0A2 Laird 1: £1.95 1,901In Stock	Mfr. Part No. 28A0640-0A2 Mouser Part No 875-28A0640-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 240ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	1,901In Stock	£1.95 £1.35 £1.15 £1.01 £0.96	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 348 Ohms 100MHz 28A0807-0A2 Laird 1: £2.57 6,835In Stock 7,200Expected 28/12/2026	Mfr. Part No. 28A0807-0A2 Mouser Part No 875-28A0807-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 348 Ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	6,835In Stock 7,200Expected 28/12/2026	£2.57 £1.86 £1.63 £1.46 £1.38	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 123 Ohms 100MHz 28A1507-0A2 Laird 1: £1.03 6,466In Stock	Mfr. Part No. 28A1507-0A2 Mouser Part No 875-28A1507-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 123 Ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	6,466In Stock	£1.03 £0.718 £0.617 £0.547 View £0.482 £0.403 £0.38	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single			Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 190 Ohms 100MHz 28A2005-0A2 Laird 1: £1.31 8,255In Stock 8,448Expected 06/01/2027	Mfr. Part No. 28A2005-0A2 Mouser Part No 875-28A2005-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 190 Ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	8,255In Stock 8,448Expected 06/01/2027	£1.31 £0.908 £0.78 £0.689 View £0.608 £0.54 £0.48	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single			Bulk
Ferrite Clamp On Cores CLAMP-ON Fltr 100MHz 280ohms White Case 28A2024-0A0 Laird 1: £3.51 2,338In Stock 1,620Expected 04/11/2026	Mfr. Part No. 28A2024-0A0 Mouser Part No 875-28A2024-0A0	Laird	Ferrite Clamp On Cores CLAMP-ON Fltr 100MHz 280ohms White Case Learn More about Laird 28a ferrite clamp filters	Datasheet	2,338In Stock 1,620Expected 04/11/2026	£3.51 £2.40 £2.04 £1.79	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER WH 320ohms 100MHz 28A2025-0A0 Laird 1: £1.59 7,844In Stock 17,040Expected 16/11/2026	Mfr. Part No. 28A2025-0A0 Mouser Part No 875-28A2025-0A0	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER WH 320ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	7,844In Stock 17,040Expected 16/11/2026	£1.59 £1.11 £0.952 £0.841 View £0.658 £0.657 £0.61	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 320ohms 100MHz 28A2025-0A2 Laird 1: £1.40 6,503In Stock 10,080Expected 13/01/2027	Mfr. Part No. 28A2025-0A2 Mouser Part No 875-28A2025-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 320ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	6,503In Stock 10,080Expected 13/01/2027	£1.40 £1.10 £0.943 £0.834 View £0.653 £0.652 £0.606	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 270ohms 100MHz 28A2026-0A2 Laird 1: £1.68 13,252In Stock	Mfr. Part No. 28A2026-0A2 Mouser Part No 875-28A2026-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 270ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	13,252In Stock	£1.68 £1.16 £0.995 £0.882 £0.863	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER WHT 250ohms 100MHz 28A2029-0A0 Laird 1: £2.43 3,184In Stock 2,250Expected 07/12/2026	Mfr. Part No. 28A2029-0A0 Mouser Part No 875-28A2029-0A0	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER WHT 250ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	3,184In Stock 2,250Expected 07/12/2026	£2.43 £1.68 £1.42 £1.26 View £1.09 £1.06	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 160ohms 100MHz 28A2432-0A2 Laird 1: £2.13 9,293In Stock	Mfr. Part No. 28A2432-0A2 Mouser Part No 875-28A2432-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 160ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	9,293In Stock	£2.13 £1.48 £1.26 £1.14	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 130ohms 100MHz 28A3039-0A2 Laird 1: £2.79 1,058In Stock	Mfr. Part No. 28A3039-0A2 Mouser Part No 875-28A3039-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 130ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	1,058In Stock	£2.79 £1.92 £1.63 £1.43 View £1.25 £1.17	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 260ohms 100MHz 28A3851-0A2 Laird 1: £6.38 1,312In Stock 1,200Expected 18/01/2027	Mfr. Part No. 28A3851-0A2 Mouser Part No 875-28A3851-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 260ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	1,312In Stock 1,200Expected 18/01/2027	£6.38 £4.32 £3.84	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 210ohms 100MHz 28A5776-0A2 Laird 1: £7.99 621In Stock 1,008Expected 21/12/2026	Mfr. Part No. 28A5776-0A2 Mouser Part No 875-28A5776-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 210ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	621In Stock 1,008Expected 21/12/2026	£7.99 £6.02 £5.05 £4.52	Min.: 1 Mult.: 1	Ferrite Clamp On Cores	Cable Single	- 40 C	+ 125 C	Bulk

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