3RW4046-1BB14, Soft Starter, 45 kW, 80 A, 200 to 480V AC

Siemens 3RW40 Soft Starter Series – Overview

Siemens 3RW40 soft starters are advanced compact motor starting solutions designed for smooth starting and stopping of three-phase asynchronous motors in industrial applications. The 3RW40 series focuses on reducing mechanical stress, limiting inrush current, and providing enhanced motor protection compared to basic soft starters. With integrated bypass functionality and flexible configuration options, Siemens 3RW40 soft starters are well suited for pumps, fans, compressors, conveyors, and general industrial machinery requiring reliable and efficient motor starting.

Product Description: 3RW4046-1BB14

The Siemens 3RW4046-1BB14 is a SIRIUS 3RW40 soft starter sized for medium‑power three‑phase motors. It is rated for an operational current of 80 A and a maximum motor power of 45 kW at 400 V (with lower power ratings at 230 V), operating from a wide supply voltage range of 200–480 V AC. Typical motor compatibility is inline three‑phase asynchronous motors in the 22–45 kW class (dependant on system voltage and installation conditions), making this unit appropriate for pumps, fans, compressors, conveyors and other continuous‑duty industrial loads. The 3RW4046-1BB14 provides adjustable start/stop ramps and current limiting (starting current limiter) to reduce mechanical stress and peak electrical demand, includes an internal bypass to minimise power dissipation during run, and offers built‑in motor overload protection. These verified features make the model a practical choice when you need a compact soft starter that lowers inrush current, extends motor life, and simplifies panel wiring in industrial motor starting applications.

Key Soft Starter Attributes