Siemens 3RT2025-1DB44-3MA0 Power Contactor

Siemens 3RT2025-1DB44-3MA0 is a 3-pole power contactor designed for AC-3e/AC-3 motor switching, delivering 17 A and 7.5 kW at 400 V with a 24 V DC coil. It features two normally open and two normally closed auxiliary contacts, a screw-terminal main circuit connection, and a captive auxiliary switch for control circuits. The contactor includes an inserted varistor for surge protection, is sized in the S0 class for compact installation, and provides a maximum switching voltage of up to 690 V AC on the main contacts. Protected to IP20 on the front, this Siemens Sirius 3RT2 device is commonly used in industrial automation to reliably start and stop motors such as conveyors, pumps, and fans, with AC-3 duty ensuring controlled motor switching under load. Coil voltage is 24 V DC, and the unit uses screw terminals with a size S0 footprint, designed for installation in standard control cabinets.