Siemens 3RT2035-1KB44-3MA0 is a 3-pole power contactor from the SIRIUS 3RT2 family designed to switch three‑phase motors up to 18.5 kW at 400 V with a 24 V DC coil. It is rated for AC-3e/AC-3 service at 41 A and includes an integrated varistor for surge suppression, along with 2 normally open and 2 normally closed auxiliary contacts for PLC interfacing. The unit uses screw-terminal connections, comes in frame size S2, and includes a captive auxiliary switch, making it well-suited for panel installations where PLC outputs control motor loads. Coil voltage tolerance is 0.8–1.2 × Uc for the 24 V DC coil.
