The 2643800602 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 43 with a burnished finish to remove sharp edges, and is engineered with guaranteed minimum impedance specifications across multiple frequency bands. The core has outer diameter A of 20.95 mm, inner diameter B of 13.2 mm, and length C of 6.35 mm (all dimensions modifiable for specific applications), with a weight of 6.3 grams. Typical impedance values are 15 O at 10 MHz, 24 O at 25 MHz, 39 O at 100 MHz, and 59 O at 250 MHz, with a calculated DC bias field of 0.24 Oe per ampere-turn. This suppression core is ideal for signal integrity applications in instrumentation, data acquisition systems, and high-speed digital circuits where EMI mitigation is critical.