Siemens 3RT1035-1BB44-3MA0 is a Sirius three-pole power contactor with a 24 V DC coil, designed for AC-3 duty up to 40 A and up to 18.5 kW at 400 V, making it suitable for motor control and other line-switching tasks in industrial automation. The main circuit uses three normally open contacts, while the auxiliary set provides two normally open and two normally closed contacts, all in a compact Size S2 enclosure with screw terminals for reliable wiring. As part of Siemens' Sirius family, this variant is now superseded by newer 3RT2 models, and Siemens notes the 3RT1035-1BB44-3MA0 variant is no longer available in the catalog.
