Siemens 3RT2025-1BB40 is a three-pole Sirius power contactor designed for AC-3e/AC-3 duty, rated for 17 A and 7.5 kW at 400 V. It is coil-operated with a 24 V DC coil and provides one normally open and one normally closed auxiliary contact for signaling or interlocking. The unit uses screw-terminal connections and is sized as S0, suitable for compact control-panel installations.
