Siemens 3RT1024-1BB40 Three-Phase Power Contactor

Siemens 3RT1024-1BB40 is a three-pole SIRIUS power contactor with a 24 V DC control coil, designed for AC-3 motor control in industrial automation. It provides three normally open main contacts (3NO) and is rated for 12 A at 400 V AC, which corresponds to about 5.5 kW at 400 V. The device uses screw terminals and is sized at S0 for compact panel installations. It features an IP20 front enclosure with IP00 protection at the terminal block and offers a mechanical life of up to 10,000,000 cycles, making it suitable for frequent switching of inductive three-phase loads. As part of Siemens’ SIRIUS lineup, this contactor is intended for reliable switching and control of three-phase motors and other power loads in automation cabinets.