The 2643173851 is a 43 material grade split flat cable EMI suppression core manufactured by Fair-Rite Products for reducing conducted electromagnetic interference in flat cable applications. This ferrite core accommodates multi-conductor flat cables with widths ranging from 12.7 mm (0.500 inch) to 77 mm (3.0 inches), and is engineered to suppress EMI across a frequency range from 1 MHz to hundreds of MHz. The core features typical impedance values of 16 O at 10 MHz, 26 O at 25 MHz, 54 O at 100 MHz, and 93 O at 250 MHz, with dimensions of 16.5 mm × 12.5 mm × 10.25 mm and a weight of 1.2 grams. The split design allows for easy installation on existing flat cables without requiring disassembly, making it ideal for retrofit applications and new designs requiring EMI mitigation in ribbon cable and flex circuit assemblies.