Siemens 3RT2025-2BB40 Three Phase AC Contactor

Siemens 3RT2025-2BB40 is a three-pole power contactor in the 3RT20 family designed for AC-3 duty, featuring three normally open main contacts and an integrated auxiliary contact pair (NO + NC). It uses a 24 V DC coil and is rated for up to 690 V insulation, with a mains current rating of 17 A (7.5 kW at 400 V) for AC-3 operation. The unit is size S0 and supports panel mounting or DIN-rail mounting, with spring-clamp terminations for straightforward wiring. Typical applications include starting and stopping three-phase motors, pumps, and conveyors in industrial control panels where reliable inductive-load switching and signaling are required.