The 2643102402 is a round ferrite cable EMI suppression core manufactured by Fair-Rite Products, designed to reduce electromagnetic interference in cable applications. This core features material grade 43 ferrite with burnished edges to remove sharp surfaces, and has a cylindrical geometry with outer diameter of 25.9 mm, inner diameter of 12.8 mm, and length of 21.3 mm. The core exhibits typical impedance values of 73 O at 10 MHz, 109 O at 25 MHz, 157 O at 100 MHz, and 186 O at 250 MHz, with a calculated DC bias field of 0.22 Oe for single-turn, single-ampere conditions. These suppression cores are ideal for cable shielding applications in electronic equipment, telecommunications, and industrial systems where EMI mitigation is critical for signal integrity and regulatory compliance.