The 2661102402 is a round cable EMI suppression core manufactured by Fair-Rite Products, designed to reduce electromagnetic interference in cable applications. This ferrite core features material grade 61 with burnished edges to remove sharp surfaces, and is available with a modifiable core length (C dimension) to suit specific application requirements. The core exhibits typical impedance values of 163 O at 100 MHz, 252 O at 250 MHz, 375 O at 500 MHz, and 550 O at 1000 MHz, with a calculated DC bias field of 0.22 Oe for single-turn, single-ampere conditions. With dimensions of 25.9 mm (A) × 12.8 mm (B) × 21.3 mm (C) and a weight of 41 grams, this core is ideal for signal integrity and noise suppression in high-frequency cable assemblies, instrumentation, and data transmission systems.