SIEMENS 3RW4046-1BB04 – SIRIUS Soft Starter

The Siemens SIRIUS 3RW4046-1BB04 is a compact SIRIUS-series soft starter designed for starting and stopping three-phase asynchronous motors. It provides controlled inrush current limiting, smooth ramp-up and ramp-down to reduce mechanical stress and voltage disturbance on the supply. Commonly panel-mounted, it is used with a bypass contactor and can be integrated into standard control systems via control signals. Suitable for industrial motor starting applications such as production lines and conveyor systems where soft starting and additional motor protection are required.