Siemens 3RT2025-1AC20 Three Phase AC Contactor

Siemens 3RT2025-1AC20 is a three‑pole power contactor from the Sirius 3RT2 family designed for AC‑3 motor control duty, with a 24 V AC coil (50/60 Hz) and screw-terminal connections in size S0. It provides 1 normally open and 1 normally closed auxiliary contact for control interlock and feedback, and is rated for 17 A at 400 V AC, corresponding to a 7.5 kW motor load at 400 V, 50/60 Hz. This configuration makes it suitable for compact motor-start applications such as conveyors, fans, and pumps in industrial automation, where reliable switching of three‑phase motors is required and compatibility with standard Siemens auxiliary blocks and overload accessories simplifies integration into complete control circuits.