Siemens AG 3RT2046-1KB44-3MA0 Power Contactor

Siemens 3RT2046-1KB44-3MA0 is a three-pole power contactor (frame size S3) designed for AC-3e/AC-3 motor loads, capable of switching up to 95 A and delivering up to 45 kW at 400 V. The device is driven by a 24 V DC coil and uses screw terminals for reliable field wiring, making it well-suited for compact control panels. A built-in varistor provides surge protection to help absorb transients when switching inductive loads. The contactor includes one normally open and one normally closed auxiliary contact, enabling simple signaling or interlocking with PLC-based control systems. This Siemens Sirius 3RT2 family member is intended for motor control applications where straightforward interfacing with automation hardware is desired, such as pumps, fans, or conveyors, and the compact S3 frame supports space-constrained installations. A captive auxiliary option simplifies mounting and wiring, while the unit’s compatibility with PLC outputs helps streamline control logic in industrial equipment. Typical applications include controlling fans, pumps, conveyors, and other three-phase motors in manufacturing, processing, and packaging lines.