EPCOS B65888 RM 14 Accessories EPCOS offer accessories to complement their B6588 ferrite cores and coil formers. Clamp The clamp has solderability to IEC 60068-2-20 at +235°C for two seconds. The clamp is constructed from 0.5 mm thick stainless spring steel (tinned) with a ground terminal. Insulating Washer The insulating washer is for use with double clad PCBs. It is a natural colour and constructed from 0.25 mm thick Makrofol FR7-2 polycarbonate.