The 2643166551 is a solid flat cable suppression core made from 43 ferrite material, engineered to reduce conducted electromagnetic interference (EMI). It is designed to accommodate flat cables with maximum dimensions of 33.70 mm by 1.20 mm. This core provides typical impedance values of 128 Ω at 25 MHz and 263 Ω at 100 MHz, effectively suppressing noise from 1 MHz into the hundreds of MHz range. Its one-piece construction is ideal for internal or post-assembly installation on flat and ribbon cables in various electronic devices to aid in EMI compliance.