3RW4036-1BB14, Soft Starter, 22 kW, 45 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: 3RW4036-1BB14

The Siemens 3RW4036-1BB14 is a SIRIUS 3RW40 S2 soft starter rated for 45 A (at 40 °C) and specified for motors up to 22 kW at 400 V (11 kW at 230 V) under the standard circuit. It accepts a supply voltage range of 200–480 V AC and is driven by a control/auxiliary voltage of 110–230 V AC/DC. Thyristor-based power electronics with an integrated bypass contact system provide smooth voltage ramping and adjustable current limitation to reduce inrush current and mechanical stress during start and stop cycles. Built-in device and motor overload protection, adjustable current limiting, and external reset capability make this SKU suitable for common industrial applications such as pumps, fans, compressors and conveyors where compact footprint and straightforward motor protection are required. The unit is supplied with screw terminals and is intended for panel mounting (IP00), making it a practical choice for engineers and procurement teams looking for a compact, proven soft starter for three-phase asynchronous motors in the 11–22 kW class depending on system voltage.

Key Soft Starter Attributes