4-pole (4 NO) TeSys K changeover contactor for AC-1 load applications up to 20 A/690 V. It offers 24 V 50/60 Hz AC coils, screw terminal connection, pre-wired mains switching circuit, mechanical interlock. Without built-in auxiliary switches, additional plug-in auxiliary switch blocks can be added on the front (to be ordered separately). Compact DIN rail mounting and screw fixing ensure reliability and durability in standard applications. Certified with multiple standards (IEC, UL, CSA, CCC, EAC) and Green Premium (RoHs/Reach).