
Siemens 3RW4423-1BC45
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The Siemens SIRIUS 3RW4423-1BC45 is a robust soft starter designed for reliable motor starting and protection in industrial applications. Operating at up to 500 V AC, this unit provides a rated current of 36 A under standard conditions at 40 °C, making it suitable for three-phase motors up to 22 kW.
For inside-delta configurations, the soft starter supports currents up to 62 A, enabling motor ratings up to 37 kW at 400–600 V AC. The integrated soft start and soft stop functions help reduce mechanical stress, limit inrush current, and extend the service life of motors and driven equipment.
The device is equipped with screw terminals for secure and reliable electrical connections and is part of the proven Siemens SIRIUS portfolio, widely used in control cabinets and industrial automation systems. Manufactured in Germany, it meets high quality and performance standards expected in the electrical industry.
Please note that the 3RW4423-1BC45 is a phased-out product. For new projects or long-term availability, Siemens recommends the SIRIUS 3RW5 series, with the preferred successor being 3RW5517-1HA15.