Siemens 3RT1075-6AF36 Sirius Power Contactor

Siemens Sirius 3RT1075-6AF36 is a 3‑pole power contactor in the S12 frame rated for AC‑3e motor switching up to 400 A and about 200 kW at 400 V AC (50–60 Hz). It provides 2 normally open and 2 normally closed auxiliary contacts and uses busbar‑compatible main terminals with conventional screw terminals for control wiring, designed for panel‑mount installations in compact motor control gear. The coil operates at 110–127 V (DC operation), allowing reliable control from common DC control circuits. This non‑reversing contactor is suitable for motor‑start applications where a robust, field‑installable control solution is required, and its 3RT1075-6AF36 designation identifies it as part of Siemens’ Sirius 3RT family with size S12 and integrated auxiliaries.