Siemens 3RT1035-1B Three Phase General Purpose Contactor

Siemens Sirius 3RT1035-1B is a three‑pole power contactor (Size S2) with a 24 V DC control coil and screw-terminal main circuit. It provides three normally open main contacts for switching the three‑phase load and is rated for AC‑3 duty up to 40 A at 400 V AC, corresponding to about 18.5 kW motor starting capability at 400 V. This general‑purpose contactor is designed for motor control in industrial equipment such as pumps, fans, conveyors, and machine tools, offering reliable switching with durable contacts and a robust coil. The compact S2 enclosure and screw‑terminal connections support secure wiring in panel installations, while the DC coil configuration enables straightforward control via standard 24 V DC control circuits. With Siemens' Sirius lineage, the 3RT1035‑1B combines straightforward 3‑pole operation, screw terminals, and a 40 A rating to efficiently handle mid‑size three‑phase motors in demanding industrial environments.