Siemens Sirius 3RT1044-3BB40 is a three-pole power contactor designed for AC-3 motor switching, rated for 65 A and up to 30 kW at 400 V. It uses a 24 V DC control coil and belongs to the Size S3 family, offering a compact form factor suitable for control panels and motor starters. This Siemens device is intended to reliably start and stop three-phase motors in industrial applications where AC-3 duty, solid main contacts, and a robust coil drive are required.
