Contactor, size 4, 2-pole, DC-3 and 5, 75A at 750V Auxiliary contacts 21 (2 NO + 1 NC) DC 220V DC operation with varistor and series resistor Operating range 0.7...1.25 x US 3TC contactor for switching direct current, 2-pole.The 3TC direct current contactors impress with their high performance combined with a compact design and high contact reliability. They are also characterized by a particularly long switching life. The devices are approved worldwide (e.g. IEC and UL/CSA).They are available in AC and DC operation, in various voltages and with various auxiliary contacts.Accessories include arc chambers, magnetic coils and surge suppressors.