Siemens 3RT2327-1BB40 Contactor

Siemens 3RT2327-1BB40 is a SIRIUS 3RT2 four-pole power contactor designed for AC-1 duty, capable of switching up to 50 A at 400 V with ambient operation up to 40 °C. The device uses a 24 V DC coil for control, enabling integration with standard 24 V control circuits. It includes four normally open main contacts and an auxiliary contact block with one normally open and one normally closed contact, improving signaling and interlocking options in motor-control circuits. Built in the compact S0 frame, it uses screw terminals for secure, serviceable wiring. This combination makes it suitable for starting and stopping small to mid-size motors, pumps, and similar loads in industrial panels where reliable isolation and straightforward control wiring are required. As part of Siemens’ SIRIUS 3RT2 family, the 3RT2327-1BB40 is designed for panel mounting and compatibility with the broader Siemens control ecosystem, with easy accessory integration for additional signaling or interlocking as needed.