Split emi suppression ferrite cable cores meisongbei sf 50 a cylindrical split ferrite cable core that can take a max cable diameter of 50mm the core has an impedance of 33omega at 25mhz and 92omega at 100mhz this device will greatly reduce both common and differential mode emirfi and is a cost effective solution for retrofit and post assembly use for internal and external power and data cables meisongbei sf 50 50mm split ferrite cable core