
Siemens 3RW4055-2BB45
Need something we currently don't have available? Our sourcing team can help you find what you need
The Siemens SIRIUS 3RW4055-2BB45 soft starter from the S6 series is designed for reliable starting and stopping of three-phase asynchronous motors in demanding industrial environments.
With a rated current of 134 A and a motor rating up to 90 kW at 500 V, this soft starter ensures reduced mechanical stress, lower inrush currents, and extended service life of motors and connected equipment. It operates within a supply voltage range of 400–600 V AC at 40 °C, making it suitable for a wide range of standard industrial applications.
The device is equipped with spring-type terminals for secure and vibration-resistant connections, supporting fast and efficient installation in control panels. Typical applications include pumps, fans, compressors, conveyors, and other heavy-duty motor-driven systems.
Please note that this is a phased-out product. Siemens recommends the SIRIUS 3RW5 series as the successor, with the preferred replacement being 3RW5055-2AB15, offering enhanced functionality and long-term availability.