Siemens 3RT2025-2BB40 Three-Phase AC-3 Power Contactor

Siemens 3RT2025-2BB40 is a 3‑pole Sirius power contactor designed for AC‑3 duty, able to switch three mains conductors at up to 400 V and 17 A, supporting loads up to 7.5 kW. It provides 3 main contacts and a single auxiliary contact block consisting of 1 normally open and 1 normally closed contact, driven by a 24 V DC coil. Spring‑loaded terminals ensure reliable connections, and the device belongs to the S0 size class, enabling compact installation in control panels alongside other 3RT2 accessories. This contactor is suitable for motor control in automation applications such as conveyors, pumps, and fans, where a contactor is used to start and stop AC loads. Its compatibility with Siemens Sirius accessories and standard control circuits allows straightforward interlocking and feedback arrangements in common motor control schemes.