Split emi suppression ferrite cable cores meisongbei sf 130a a cylindrical split ferrite cable core that can take a max cable diameter of 130mm the core has an impedance of 50omega at 25mhz and 130omega 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 130a 130mm split ferrite cable core