Siemens 3RT1026-1BB44-3MA0 Contactor

Siemens 3RT1026-1BB44-3MA0 is a 3-pole Sirius power contactor built for AC-3 motor switching at up to 400 V. It employs a 24 V DC coil to energize three normally open main contacts that connect three-phase lines when commanded by the control circuit. The device also includes a pair of auxiliary contacts: two normally open and two normally closed, providing additional feedback and interlock possibilities in control logic. With a current rating of 25 A and a load capacity of 11 kW at 400 V in AC-3 service, this contactor is intended for starter circuits in machinery such as conveyors, pumps, fans, and similar equipment. As part of Siemens’ Sirius family, it is designed for reliable actuation within standard industrial control panels and can be integrated with compatible auxiliary blocks and control wiring commonly used in Siemens automation schemes. This combination of main contacts and auxiliary contacts in a compact, three-pole form makes it suitable for compact, robust motor control applications where both switching and signaling are required.