The 2643540102 is a round cable EMI suppression core manufactured by Fair-Rite Products, designed to attenuate electromagnetic interference in cable applications. This ferrite core features a 43 material grade with burnished edges for safe handling, and provides typical impedance values of 43 O at 10 MHz, 68 O at 25 MHz, 98 O at 100 MHz, and 106 O at 250 MHz. The core has outer diameter A of 14.3 mm, inner diameter B of 6.35 mm, and length C of 10.15 mm (all with specified tolerances), with a weight of 6.3 grams. The DC bias field is 0.43 Oe per ampere-turn, and the core length can be modified to suit specific applications. These suppression cores are ideal for use in signal cables, power distribution systems, and other applications requiring controlled impedance filtering to reduce EMI.