Siemens 3RT1033-1AK60 Contactor

Siemens Sirius 3RT1033-1AK60 is a three‑pole power contactor (Size S2) engineered for AC‑3 motor control duties, delivering 25 A and up to 11 kW at 400 V. It uses screw-terminal connections for robust panel or machine wiring and is designed for compact installation in control cabinets. The coil is AC operated, compatible with 110 V at 50 Hz or 120 V at 60 Hz control circuits, enabling reliable actuation from common control supplies. The main circuit is rated for up to 400 V with an insulation rating of 690 V, and the coil‑to‑main contact isolation is specified at 400 V in EN 60947‑1 terms, ensuring safe separation between control and load contacts. This non‑reversing contactor includes three main contacts suitable for three‑phase switching and is intended for AC‑3 duty applications such as starting and stopping motors in industrial environments. Siemens notes that the 3RT1033‑1AK60 is a phased‑out model in the Sirius family, with the recommended successor being the 3RT2026‑1AK60 for future installations and replacements.