Siemens 3RT1024-1BB40 Contactor

Siemens 3RT1024-1BB40 is a three-pole power contactor from the SIRIUS family with a 24 V DC control coil, designed for AC-3 motor switching at 400 VAC. It features three normally open main contacts with screw-terminal connections and a size S0 footprint suitable for panel mounting. The device is rated for 12 A at 400 VAC under AC-3, supporting a 5.5 kW motor load at the same voltage, and it also offers an AC-1 rating up to 40 A at 400 VAC for resistive loads. The coil is 24 V DC, enabling direct interfacing with standard DC control circuits, and the unit is front-protected to IP20. Operating conditions include ambient temperatures from -25 to +60°C and installation elevations up to 2000 meters. With a mechanical life of about 10,000,000 cycles and compatibility with common motor-control applications such as conveyors, pumps, and fans, this 3RT1024-1BB40 delivers compact, reliable three-pole switching for demanding 400 VAC motor control projects.