Siemens 3RT2024-1BB40 is a 3-pole power contactor with a 24 V DC coil, designed for AC-3e/AC-3 duty. It switches three-phase loads up to 12 A and up to 5.5 kW at 400 V. The device features three main contacts and an auxiliary contact block comprising one normally open and one normally closed contact; wiring uses screw terminals; compact size S0. Energizing the 24 V DC coil pulls in the contact set to control the load. This makes the 3RT2024-1BB40 suitable for motor control circuits, fans, pumps and other loads in three-phase AC systems where a DC-operated control circuit is used.
