Automation solution

The Siemens 3RT series, a core member of the SIRIUS Classic and Innovation families, is a modular, high-performance AC/DC contactor (including multiple sub-series such as 3RT1/2/3/5/6). Known for its compactness, reliability, and scalability, it is widely used in various applications, including motor starting and stopping, heating, lighting, wind power, and building automation. The following provides a systematic review of these contactors from four perspectives: technical features, model system, typical applications, and key selection considerations.