3RW5072-6AB14, Soft Starter, 110 kW, 210 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: 3RW5072-6AB14

The Siemens 3RW5072-6AB14 is a SIRIUS 3RW50 soft starter engineered for medium‑to‑large three‑phase motor installations. This SKU is rated for 210 A operational current and supports a line supply range of 200–480 V AC, with the control/supply voltage for auxiliary electronics specified at 110–250 V AC. At standard operating temperatures (40 °C) the device covers typical motor sizes up to 110 kW at 400 V (and 55 kW at 230 V), making it suitable for heavy pumps, large compressors, conveyor drives and other industrial motor loads where reduced mechanical stress and controlled starting currents are required. The unit is supplied with screw-terminals and includes an analog output for process monitoring or integration into control systems. Use cases where stable ramped starts, reduced peak torque and extended mechanical life are priorities will benefit from this model’s rated current and wide supply-voltage compatibility. Procurement teams and engineers will find this variant appropriate when replacing older 3RW40 series starters or upgrading installations that require higher continuous current capacity and an analog status signal for downstream automation.

Key Soft Starter Attributes