Siemens 3RT1055-6...6 IEC Contactor 3-Phase Motor Starter

Siemens Sirius 3RT1055-6AP36 is a 3-pole power contactor designed for IEC motor control in AC-3e/AC-3 service, rated for 150 A and 75 kW at 400 V AC with a 50/60 Hz supply. The main circuit is intended for conventional wiring (busbar control) and the auxiliary circuit uses screw terminals, with 2 normally open and 2 normally closed contacts to support interlocking and signaling. The coil energization is DC, 220–240 V, enabling reliable PLC-friendly control from standard automation panels. This 3‑pole device is suited for switching squirrel-cage motors in industrial equipment such as pumps, fans, conveyors, and other load-driven machines, and it adheres to the IEC 60947-4-1 standards for motor-contactor assemblies.