3RW4425-1BC44

This 3RW4425-1BC44 listing is for a SIRIUS soft starter, part number 3RW4425-1BC44, designed for high-feature AC motor control applications across a wide range of industrial environments. Built to smooth motor start-up sequences and reduce mechanical stress, this unit is rated for a standard circuit operating current of 57 A and 30 kW at 400 V and 40 °C, with an inside-delta configuration capable of handling 99 A and 55 kW — making it well suited for pumps, compressors, conveyors, fans, and other demanding motor-driven equipment.

The  condition means this unit has been returned to full operational specification through a professional refurbishment process. Each component is tested and verified to meet original design tolerances, offering a reliable and cost-effective alternative to purchasing new. For facilities maintaining aging SIRIUS-based motor control systems, sourcing a refurbished unit like this one can minimize downtime without the lead times often associated with new industrial controls.3RW4425-1BC44

Compatible with operating voltages from 200 to 460 V AC and a 230 V AC control supply voltage, this soft starter integrates into both North American and international 50/60 Hz electrical systems with ease. Screw terminal connections simplify installation and wiring within existing cabinet layouts. The unit also features integrated bypass contacts, thyristor-based power electronics, motor overload protection, thermistor motor protection evaluation, adjustable current limiting, and an external reset function — providing comprehensive motor management in a single compact device.3RW4425-1BC44

Whether you are maintaining a legacy production line or seeking a budget-conscious solution for a new build, a properly remanufactured soft starter of this type delivers the performance characteristics of the original platform. Always verify compatibility with your motor nameplate data and control circuit voltage before installation, and consult the original product documentation for full application guidelines.

Soft Start Control: Gradually ramps up voltage to connected AC motors, reducing inrush current and mechanical stress during start-up.
Dual Circuit Ratings: Supports both standard (57 A / 30 kW) and inside-delta (99 A / 55 kW) circuit configurations at 400 V and 40 °C.
Wide Voltage Range: Operates across a 200–460 V AC power supply range, making it compatible with both European and North American industrial systems.
Integrated Bypass: Features a built-in bypass contact system that reduces heat generation and power loss once the motor reaches full speed.
Motor Protection: Includes adjustable motor overload protection and thermistor motor protection evaluation to safeguard connected equipment.