Siemens 3RT2017-1BB42 SIRIUS 3RT Series Contactor

Siemens 3RT2017-1BB42 is a SIRIUS 3RT-series three-pole power contactor (size S00) that uses a 24 V DC control coil, built for AC-3e/AC-3 duty and intended to switch motors and other inductive loads in compact control panels. This device supports screw-terminal wiring, provides a robust, screw-terminal connection for reliable field assembly, and is designed for upright mounting to simplify wiring routing and panel layout in standard industrial environments. On a 400 V electrical network, the 3RT2017-1BB42 is rated for up to 12 A continuous current, with a nominal switching capacity of 5.5 kW at 400 V, aligning with common small to medium motor applications such as pumps, fans, and machine tools; its AC-3e/AC-3 rating indicates suitability for starting and stopping asynchronous motors. The unit includes one normally closed auxiliary contact for signaling or control interlock, completing the essential feedback loop in control circuits, and its compact S00 frame makes it a space-efficient choice for panel builders integrating Siemens Sirius 3RT components.