Siemens 3RT2017-1BB42 AC Magnetic Contactor 3RT Series

Siemens 3RT2017-1BB42 is a compact S00-size three-pole power contactor from the SIRIUS 3RT2 family, designed for AC-3e/AC-3 motor control duty. It uses a 24 V DC coil to energize and switches a rated current of 12 A, enabling a motor load up to 5.5 kW at 400 V across three main contacts. The unit includes one normally closed auxiliary contact and employs screw terminals for straightforward field wiring, making it suitable for small motors in automation, conveyors, pumps, and general machine control. With its compact footprint and three-pole configuration, it fits into space-constrained control panels while meeting standard industrial electrical specifications for AC-3 duty applications. This model is part of Siemens’ Sirius power-contactor lineup, providing consistent coil-to-main-contact performance in a compact S00 package.