Siemens 3RT1035-3BB40 Contactor

Siemens 3RT1035-3BB40 is a three‑pole power contactor in the S2 size designed to switch AC‑3 loads, rated for 40 A with an 18.5 kW capacity at 400 V. It uses a 24 V DC coil for control, making it compatible with standard PLC outputs and automation panels for automated motor control. The power circuit employs screw terminals, while the control circuit features spring‑clamp terminals for secure, repeatable wiring in industrial panels. Suitable for starting and stopping 3‑phase motors in applications such as conveyors, pumps, and fans, this Siemens Sirius device maintains a compact footprint and a consistent mounting interface within the 3RT family for reliable replacement and integration.