Siemens 3RT2024-1BB40 Contactor

Siemens 3RT2024-1BB40 is a three-pole power contactor with a 24 V DC coil designed for AC-3e/AC-3 motor-starting duty. It handles up to 12 A and up to 5.5 kW at 400 V, making it suitable for light- to medium-load motor control in industrial automation. The unit belongs to the Siemens SIRIUS 3RT2 family and comes in size S0 with screw terminals for straightforward wiring. It includes a single auxiliary contact: one normally open (NO) and one normally closed (NC), enabling simple control logic and feedback wiring alongside the main contacts. This 3-pole unit is crafted for reliable operation in compact control panels, enabling safe isolation and switching of three-phase motors. Use cases include machine tools, conveyors, pumps, and other automation applications where a compact DC-signal-coil contactor is paired with a robust AC-3 duty motor-controlling function.