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.

Results: 33
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Description Datasheet Availability Pricing (JPY) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Product Type
Shape
Core Material
Inside Diameter
Outside Diameter
Outside Length
Outside Width
Outside Height
Series
Packaging
Laird Ferrite Clamp On Cores Rnd,Spl,BB,CSNO Snap-on
Datasheet
1,041In Stock
Min.: 1
Mult.: 1

Ferrite Clamp On Cores 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 170ohms 100MHz
Datasheet
63,307In Stock
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 5.44 mm 13.72 mm 30.56 mm 13.72 mm 12.72 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 572ohms 100MHz
Datasheet
28,017In Stock
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 5.04 mm 18.75 mm 53.39 mm 18.75 mm 18.75 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 407ohms 100MHz
Datasheet
43,130In Stock
22,464Expected 12/8/2026
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 6.75 mm 18.75 mm 52.91 mm 18.75 mm 18.75 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 220ohms 100MHz
Datasheet
35,903In Stock
25,900Expected 10/20/2026
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 9 mm 19.7 mm 35.1 mm 19.7 mm 18 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 183 Ohms 100MHz
Datasheet
5,862In Stock
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 7 mm 16.5 mm 30.5 mm 15.25 mm 16.5 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 233 Ohms 100MHz
Datasheet
3,982In Stock
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 9 mm 19.7 mm 35.1 mm 19.7 mm 18 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 240ohms 100MHz
Datasheet
9,603In Stock
10,780Expected 10/20/2026
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 3.5 mm 13 mm 25.2 mm 13 mm 11.5 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER WHT 170ohms 100MHz
Datasheet
8,815In Stock
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 5.44 mm 13.72 mm 30.56 mm 13.72 mm 12.72 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 227ohms 100MHz
Datasheet
3,972In Stock
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 5.44 mm 14.71 mm 42.88 mm 14.71 mm 14.71 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 240ohms 100MHz
Datasheet
1,976In Stock
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 9.07 mm 20.07 mm 41.4 mm 19.9 mm 21.65 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 348 Ohms 100MHz
Datasheet
3,498In Stock
3,720Expected 10/20/2026
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 10 mm 24.82 mm 37.5 mm 20.5 mm 9.55 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 123 Ohms 100MHz
Datasheet
3,179In Stock
4,032Expected 10/20/2026
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 7 mm 15 mm 18 mm 15 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 190 Ohms 100MHz
Datasheet
5,636In Stock
5,280Expected 10/20/2026
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 5 mm 13 mm 25.5 mm 13 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON Fltr 100MHz 280ohms White Case
Datasheet
2,418In Stock
1,620Expected 11/9/2026
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 13 mm 32.5 mm 29 mm 29.62 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 320ohms 100MHz
Datasheet
9,962In Stock
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 7.05 mm 32.5 mm 18.15 mm 18.9 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 270ohms 100MHz
Datasheet
8,896In Stock
5,800Expected 9/29/2026
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 6.8 mm 21 mm 41.7 mm 21 mm 21 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER WHT 250ohms 100MHz
Datasheet
3,394In Stock
2,250Expected 11/30/2026
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 10 mm 32.77 mm 22.28 mm 21.84 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 250ohms 100MHz
Datasheet
2,765In Stock
9,600On Order
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 10 mm 32.77 mm 22.28 mm 21.84 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 160ohms 100MHz
Datasheet
4,993In Stock
4,900Expected 10/7/2026
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 8.2 mm 19.2 mm 19.9 mm 19.2 mm 23.1 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 130ohms 100MHz
Datasheet
1,317In Stock
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 10.2 mm 24.55 mm 13.6 mm 24.55 mm 28.5 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 260ohms 100MHz
Datasheet
1,000In Stock
750Expected 9/22/2026
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 13 mm 30 mm 33.7 mm 30 mm 30 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 210ohms 100MHz
Datasheet
802In Stock
1,008Expected 12/7/2026
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 19.4 mm 42 mm 29.2 mm 29.4 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 220 Ohms 100MHz
Datasheet
619In Stock
700Expected 11/30/2026
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 9 mm 19.7 mm 28 mm 18.25 mm 16 mm 28A Bulk
Laird Ferrite Clamp On Cores CLAMP-ON FILTER BLK 177 Ohms 100MHz
Datasheet
583In Stock
Min.: 1
Mult.: 1

Ferrite Clamp On Cores Round 28 13.06 mm 23.5 mm 36.25 mm 22 mm 23.5 mm 28A Bulk