Siemens 3RT1056-6AF36 3-Pole Contactor

Siemens 3RT1056-6AF36 is a Sirius three‑pole power contactor (frame size S6) designed for AC‑3e/AC‑3 duty, rated to 185 A and up to 90 kW at 400 V AC (50–60 Hz). It switches a three‑phase main circuit via screw terminals with busbar connections and includes an auxiliary contact block offering 2 normally open and 2 normally closed contacts for control wiring. The main circuit is insulated to 1,000 V and the auxiliary circuit to 500 V. The coil voltage is 110–127 V, and the unit weighs about 3.36 kg. This 3RT1056‑6AF36 is built for reliable motor starting and switching of heavy inductive loads in industrial environments, and is commonly used in control panels and motor control centers where a compact, high‑current, three‑pole contactor with integrated auxiliary contacts is required. As part of the Siemens Sirius lineup, it supports robust operation in demanding applications such as conveyor drives, pumps, and processing equipment, where interlocking and direct PLC integration of the control circuit are beneficial.