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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 (USD) Filter the results in the table by unit price based on your quantity.	Qty.
Ferrite Clamp On Cores CLAMP-ON FILTER WHT 170ohms 100MHz 28A0392-0A0 Laird 1: $1.40 8,715In Stock	Mfr. Part # 28A0392-0A0 Mouser Part # 875-28A0392-0A0	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER WHT 170ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	8,715In Stock	$1.40 $1.05 $0.931 $0.852 View $0.762 $0.635 $0.632	Min.: 1 Mult.: 1
Ferrite Clamp On Cores Rnd,Spl,BB,CSNO Snap-on 28A2025-000 Laird 1: $2.41 1,041In Stock	Mfr. Part # 28A2025-000 Mouser Part # 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	$2.41 $1.66 $1.42 $1.26 View $1.10 $0.971 $0.919 $0.918	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 170ohms 100MHz 28A0392-0A2 Laird 1: $1.11 61,632In Stock	Mfr. Part # 28A0392-0A2 Mouser Part # 875-28A0392-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 170ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	61,632In Stock	$1.11 $0.985 $0.95 $0.808 View $0.713 $0.599 $0.597	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 572ohms 100MHz 28A0592-0A2 Laird 1: $3.15 27,299In Stock	Mfr. Part # 28A0592-0A2 Mouser Part # 875-28A0592-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 572ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	27,299In Stock	$3.15 $2.17 $1.64 $1.43 View $1.32 $1.29	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 407ohms 100MHz 28A0593-0A2 Laird 1: $2.62 42,420In Stock 22,464Expected 12/8/2026	Mfr. Part # 28A0593-0A2 Mouser Part # 875-28A0593-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 407ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	42,420In Stock 22,464Expected 12/8/2026	$2.62 $2.05 $1.80 $1.59 View $1.39 $1.32	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 220ohms 100MHz 28A2736-0A2 Laird 1: $2.12 34,603In Stock 25,900Expected 10/7/2026	Mfr. Part # 28A2736-0A2 Mouser Part # 875-28A2736-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 220ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	34,603In Stock 25,900Expected 10/7/2026	$2.12 $1.47 $1.26 $1.11 View $0.969 $0.856 $0.849	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 183 Ohms 100MHz 28A2307-0A2 Laird 1: $2.12 5,856In Stock	Mfr. Part # 28A2307-0A2 Mouser Part # 875-28A2307-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 183 Ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	5,856In Stock	$2.12 $1.47 $1.26 $1.11 $1.01	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 233 Ohms 100MHz 28A2738-0A2 Laird 1: $6.08 3,939In Stock	Mfr. Part # 28A2738-0A2 Mouser Part # 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	$6.08 $4.17 $3.54 $3.10 View $2.70 $2.66	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 240ohms 100MHz 28A0350-0B2 Laird 1: $1.90 8,560In Stock 10,780Expected 10/20/2026	Mfr. Part # 28A0350-0B2 Mouser Part # 875-28A0350-0B2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 240ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	8,560In Stock 10,780Expected 10/20/2026	$1.90 $1.35 $1.18 $1.05 View $0.936 $0.829 $0.822	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 227ohms 100MHz 28A0434-0A2 Laird 1: $2.24 3,139In Stock 2,816Expected 12/21/2026	Mfr. Part # 28A0434-0A2 Mouser Part # 875-28A0434-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 227ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	3,139In Stock 2,816Expected 12/21/2026	$2.24 $1.59 $1.36 $1.20 View $1.06 $1.04	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 240ohms 100MHz 28A0640-0A2 Laird 1: $2.59 1,976In Stock	Mfr. Part # 28A0640-0A2 Mouser Part # 875-28A0640-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 240ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	1,976In Stock	$2.59 $1.80 $1.53 $1.35 $1.28	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 348 Ohms 100MHz 28A0807-0A2 Laird 1: $3.57 3,392In Stock 10,920On Order	Mfr. Part # 28A0807-0A2 Mouser Part # 875-28A0807-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 348 Ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	3,392In Stock 10,920On Order On Order Ship Dates Mfr. #: 28A0807-0A2 Stock: 3,392 Can Ship Immediately On Order: 3,720 Expected 10/12/2026 7,200 Expected 12/21/2026 Factory Lead-Time: 13 Weeks	$3.57 $2.46 $2.09 $1.84	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 123 Ohms 100MHz 28A1507-0A2 Laird 1: $1.30 2,445In Stock 4,032Expected 10/12/2026	Mfr. Part # 28A1507-0A2 Mouser Part # 875-28A1507-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 123 Ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	2,445In Stock 4,032Expected 10/12/2026	$1.30 $0.903 $0.776 $0.688 View $0.606 $0.507 $0.506	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 190 Ohms 100MHz 28A2005-0A2 Laird 1: $1.68 3,117In Stock 13,728On Order	Mfr. Part # 28A2005-0A2 Mouser Part # 875-28A2005-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 190 Ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	3,117In Stock 13,728On Order On Order Ship Dates Mfr. #: 28A2005-0A2 Stock: 3,117 Can Ship Immediately On Order: 5,280 Expected 10/12/2026 8,448 Expected 12/21/2026 Factory Lead-Time: 13 Weeks	$1.68 $1.16 $0.998 $0.918 View $0.809 $0.657 $0.636	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON Fltr 100MHz 280ohms White Case 28A2024-0A0 Laird 1: $4.41 2,418In Stock 1,620Expected 11/9/2026	Mfr. Part # 28A2024-0A0 Mouser Part # 875-28A2024-0A0	Laird	Ferrite Clamp On Cores CLAMP-ON Fltr 100MHz 280ohms White Case Learn More about Laird 28a ferrite clamp filters	Datasheet	2,418In Stock 1,620Expected 11/9/2026	$4.41 $3.02 $2.56 $2.38	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER WH 320ohms 100MHz 28A2025-0A0 Laird 1: $2.04 8,449In Stock 17,040Expected 11/9/2026	Mfr. Part # 28A2025-0A0 Mouser Part # 875-28A2025-0A0	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER WH 320ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	8,449In Stock 17,040Expected 11/9/2026	$2.04 $1.48 $1.19 $1.10 View $0.877 $0.876 $0.813	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 320ohms 100MHz 28A2025-0A2 Laird 1: $1.78 9,682In Stock	Mfr. Part # 28A2025-0A2 Mouser Part # 875-28A2025-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 320ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	9,682In Stock	$1.78 $1.32 $1.16 $1.09 View $0.87 $0.842 $0.809 $0.808 $0.807	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 270ohms 100MHz 28A2026-0A2 Laird 1: $2.85 13,594In Stock 200On Order	Mfr. Part # 28A2026-0A2 Mouser Part # 875-28A2026-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 270ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	13,594In Stock 200On Order	$2.85 $1.97 $1.68 $1.48 $1.15	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER WHT 250ohms 100MHz 28A2029-0A0 Laird 1: $3.23 3,244In Stock 2,250Expected 11/30/2026	Mfr. Part # 28A2029-0A0 Mouser Part # 875-28A2029-0A0	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER WHT 250ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	3,244In Stock 2,250Expected 11/30/2026	$3.23 $2.23 $1.90 $1.67 View $1.44 $1.41	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 250ohms 100MHz 28A2029-0A2 Laird 1: $2.58 7,645In Stock 4,712Expected 10/23/2026	Mfr. Part # 28A2029-0A2 Mouser Part # 875-28A2029-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 250ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	7,645In Stock 4,712Expected 10/23/2026	$2.58 $1.86 $1.59 $1.41	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 160ohms 100MHz 28A2432-0A2 Laird 1: $2.70 4,393In Stock 4,900Expected 10/5/2026	Mfr. Part # 28A2432-0A2 Mouser Part # 875-28A2432-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 160ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	4,393In Stock 4,900Expected 10/5/2026	$2.70 $1.87 $1.59 $1.52	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 130ohms 100MHz 28A3039-0A2 Laird 1: $3.57 1,282In Stock	Mfr. Part # 28A3039-0A2 Mouser Part # 875-28A3039-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 130ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	1,282In Stock	$3.57 $2.45 $2.08 $1.82 View $1.58 $1.56	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 260ohms 100MHz 28A3851-0A2 Laird 1: $9.87 1,600In Stock	Mfr. Part # 28A3851-0A2 Mouser Part # 875-28A3851-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 260ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	1,600In Stock	$9.87 $7.01 $5.55 $5.22 $5.12	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 210ohms 100MHz 28A5776-0A2 Laird 1: $9.90 647In Stock 1,008Expected 12/21/2026	Mfr. Part # 28A5776-0A2 Mouser Part # 875-28A5776-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 210ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	647In Stock 1,008Expected 12/21/2026	$9.90 $8.03 $6.72 $6.02	Min.: 1 Mult.: 1
Ferrite Clamp On Cores CLAMP-ON FILTER BLK 220 Ohms 100MHz 28A2809-0A2 Laird 1: $3.44 619In Stock 700Expected 12/14/2026	Mfr. Part # 28A2809-0A2 Mouser Part # 875-28A2809-0A2	Laird	Ferrite Clamp On Cores CLAMP-ON FILTER BLK 220 Ohms 100MHz Learn More about Laird 28a ferrite clamp filters	Datasheet	619In Stock 700Expected 12/14/2026	$3.44 $2.37 $2.02 $1.77 $1.57	Min.: 1 Mult.: 1

28A Ferrite Clamp Filters

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