Siemens 3RT1033-1AK60 Three-Phase Power Contactor

Siemens 3RT1033-1AK60 is a three-pole Sirius power contactor in frame size S2, designed for AC-3 duty with a 25 A current rating and up to 11 kW at 400 V. The coil is rated 110 V AC at 50 Hz / 120 V AC at 60 Hz, enabling direct control from standard control circuits, and it uses screw-terminal connections for secure wiring. This non-reversing contactor is built for motor-control applications in industrial settings and is part of Siemens’ legacy Sirius lineup, now superseded by the 3RT2 family (notably 3RT2026-1AK60). Common uses include starting and stopping three-phase motors, pumps, and conveyors when a compact, IEC-rated switch is required for 3-phase loads powered from a 400 V supply.