3RW5075-6AB14, Soft Starter, 200 kW, 370 A, 200 to 480V AC

Siemens 3RW50 Soft Starter Series – Overview

Siemens 3RW50 soft starters are high-performance motor starting solutions designed for demanding industrial applications requiring reliable control of three-phase asynchronous motors. The 3RW50 series focuses on reducing mechanical stress, limiting inrush current, and supporting higher motor power ratings compared to compact soft starters. With robust construction and advanced motor protection capabilities, Siemens 3RW50 soft starters are well suited for heavy-duty applications such as large pumps, compressors, conveyors, mixers, and industrial process machinery where dependable motor starting is critical.

Product Description: 3RW5075-6AB14

The Siemens 3RW5075-6AB14 is a SIRIUS 3RW50 soft starter rated for an operational current of 370 A (at 40 °C) and specified for three‑phase motor power up to 200 kW at 400 V. It is designed for supply voltages from 200 to 480 V AC and uses a 110–250 V AC control supply. Typical motor compatibility covers large industrial three‑phase asynchronous motors used in pumps, compressors, conveyors and other heavy‑duty machinery where a controlled, low‑stress start is required. Verified functional features for this SKU include an integrated bypass contact system to reduce internal heating and running losses, electronic motor overload protection, an analog output (4–20 mA default, parameterizable), adjustable current limiting (130–700 %), and selectable voltage ramp start (start voltage 30–100 %, ramp time 0–20 s). Communication capability is provided via optional plug‑in modules (PROFINET, PROFIBUS, Modbus TCP/RTU, Ethernet/IP), allowing integration into industrial control networks. These confirmed characteristics make the 3RW5075-6AB14 suitable where controlled starts, remote monitoring and modular communication are required to protect equipment and reduce mechanical stress during industrial motor starting.

Key Soft Starter Attributes