3RW5225-1AC14, Soft Starter, 30 kW, 63 A, 200 to 480V AC

Siemens 3RW52 Soft Starter Series – Overview

Siemens 3RW52 soft starters are high-performance motor starting solutions designed for demanding industrial applications requiring precise and reliable control of three-phase asynchronous motors. The 3RW52 series focuses on reducing mechanical stress, limiting inrush current, and supporting higher motor power ratings with advanced protection functions compared to compact soft starters. With robust construction and enhanced motor protection capabilities, Siemens 3RW52 soft starters are well suited for heavy-duty applications such as large pumps, compressors, conveyors, mixers, and industrial process machinery where dependable motor starting and operational reliability are critical.

Product Description: 3RW5225-1AC14

The Siemens 3RW5225-1AC14 is a SIRIUS 3RW52 series motor soft starter rated for a nominal operating current of 63 A and a standard rated motor output of 30 kW at 400 V. It is designed for three-phase supply voltages from 200 to 480 V AC (50/60 Hz) and uses a 110–250 V AC control supply. This model is suitable for starting medium-power industrial motors in applications such as large pumps, material conveyors, mixers and other continuous-process machinery where controlled start torque and reduced inrush currents are required.

Practical compatibility: the 3RW5225-1AC14 typically matches motors in the ~18.5–30 kW class for direct-start-equivalent installations (30 kW is the standard rated motor power at 400 V specified for this SKU). It supports common plant requirements for controlled acceleration and reduced mechanical stress, helping to extend drive-train lifetime and reduce peak electrical demand during starts.

Standout, verified features for this SKU include screw-type main terminals for secure power connections and an analog output option for external monitoring or integration with plant automation. The device is supplied as a factory-active SIRIUS 3RW52 product with available Siemens documentation, M‑CAD/E‑CAD files and a downloadable datasheet and manual for detailed wiring and configuration.

Who should consider this unit: procurement and electrical engineers specifying a compact but robust industrial motor soft starter for 200–480 V three-phase systems where a 63 A rated starter and 30 kW (at 400 V) motor support are required, and where integration with analog monitoring is needed.

Key Soft Starter Attributes