Siemens 3RT1056-6AF36 Three-Phase AC Contactor

Siemens SIRIUS 3RT1056-6AF36 is a three-pole power contactor designed for AC-3e/AC-3 motor-starting duty, rated up to 185 A and 90 kW at 400 V AC (50–60 Hz). The device uses a 110–127 V DC coil to energize its main contacts, and it includes 2 normally open and 2 normally closed auxiliary contacts for control logic. Sized as S6 within the 3RT1 family, it offers insulation voltage up to 1000 V for the main circuit, with main-circuit connections intended for busbar control and auxiliary-circuit connections via screw terminals. This robust contactor is suitable for use in industrial motor control panels, conveyors, pumps, and fans where reliable remote switching is required, and it integrates with standard Siemens accessories for expanded functionality.