3RW5214-1AC14, Soft Starter, 7.5 kW, 18 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: 3RW5214-1AC14

The Siemens 3RW5214-1AC14 is a SIRIUS 3RW52 soft starter rated for 18 A and specified for a motor power rating of 7.5 kW (reference rating). It is designed for use on three-phase supply voltages from 200 to 480 V AC and accepts a control/auxiliary supply of 110 to 250 V AC. Typical motor compatibility is small-to-medium industrial three-phase induction motors up to the referenced 7.5 kW class (consult motor nameplate and installation conditions for precise selection). This model suits industrial motor starting tasks where reduced mechanical stress and controlled inrush current are needed — for example medium-capacity pumps, fans, conveyors and mixers in manufacturing or water utilities. Verified, model-specific features include screw-type power/auxiliary terminals for secure field wiring and an analog output (analog monitoring signal) for easy integration into local control or PLC systems. The unit also supports optional HMI and fieldbus/industrial Ethernet communication modules for PROFINET, PROFIBUS, Modbus (TCP/RTU) and Ethernet/IP, allowing flexible system integration where remote monitoring or control is required.

Key Soft Starter Attributes