Siemens 3RT1036-1BB40 Electrical Power Contactor

Siemens 3RT1036-1BB40 is a three-pole Sirius power contactor designed for AC-3 motor switching in industrial control panels. It provides a main current rating of 50 A and can switch up to 22 kW at 400 V, with a 3-pole configuration of normally open main contacts (3NO). The device is actuated by a DC 24 V control coil, wired via screw terminals, and it is listed as size S2. Designed for frequent motor starting and stopping in 3-phase circuits, it offers a mechanical service life of up to 10,000,000 switching cycles. With its combination of a 24 VDC coil, 3 main contacts, and AC-3 rating, this model is well suited for motor starters in industrial control cabinets and equipment that require reliable, compact control of induction motors.