ACT1210E Ethernet 10BASE-T1S Common Mode Filter TDK ACT1210E Common Mode Filter is designed for automotive Ethernet 10BASE-T1S and comes in a 3.2mm x 2.5mm x 2.5mm package. This filter utilizes TDK's proprietary wire-winding structure and optimal materials to accomplish high scattering parameters (S-parameters) and a maximum line-to-line capacitance of 10pF. The ACT1210E operates in a temperature range from -40°C to +125°C. High thermal shock resistance and outstanding reliability are achieved by laser welding the winding wires to the metallizing terminals.