Siemens 3RT1054-6AF36 Contactor

The Siemens 3RT1054-6AF36 Sirius three-pole power contactor is designed for AC-3e duty in three‑phase motor control, delivering 115 A with a 55 kW rating at 400 V (AC, 50–60 Hz). It operates from a 110–127 V DC coil, enabling reliable control from standard control circuits, and is configured with two normally open and two normally closed auxiliary contacts for interlocking and signaling. The main circuit is wired via screw terminals, while the auxiliary circuit also uses screw connections, and the unit supports conventional busbar control for streamlined panel integration. Sized for the S6 frame, this compact contactor weighs about 3.3 kg, balancing robust current capacity with a compact footprint suitable for demanding industrial environments. Typical uses include starting and protecting three-phase motors, pumps, fans, and other heavy loads in machine tools and automated production lines, where dependable switching and clear auxiliary feedback are essential.