Siemens AG 3RT2316-1BB40 Electrical Contactor

Siemens 3RT2316-1BB40 is a four-pole Sirius contactor with a 24 V DC coil, designed for AC-1 duty and four normally open contacts. It is rated for up to 18 A at 400 V (AC-1) with a 40 °C ambient limit, and uses screw-terminal connections in the compact S00 size, supporting a maximum system voltage of 690 V. Four NO contacts across four poles enable simultaneous switching of multiple circuits, making it well suited for motor control, pumps, conveyors, and other industrial loads in compact control panels. Typical applications include controlling AC loads in automation systems where a 24 V DC control signal energizes the coil, allowing reliable remote actuation from PLCs. As part of Siemens' SIRIUS 3RT family, it combines a compact footprint with robust switching performance for panel- or rail-mounted installations. Screw terminals provide secure field wiring in rugged environments, and the unit's 690 V maximum load rating supports common industrial mains voltages.