Siemens 3RV2901-1G Solid State Transverse Auxiliary Switch

Siemens 3RV2901-1G is a transverse auxiliary switch designed for front mounting on the Sirius 3RV2 molded-case circuit-breaker family. Described as solid-state compatible, this accessory provides a single changeover contact (1 CO) via a screw-terminal connection compatible with 3RV2 breakers. It is intended for circuit-breaker sizes S00, S0, S2, and S3, placing it squarely within the Sirius modular system’s auxiliary-contact options. The unit carries IP20 protection on the front and is rated for operation in ambient temperatures from -20°C to +60°C, with storage temperatures from -50°C to +80°C. The 3RV2901-1G sits on the front of the breaker and is compatible with electronics for front-accessible auxiliary contacts in panel installations. As a Siemens part, it is cataloged specifically as a transverse auxiliary switch, solid-state compatible, 1 CO, with screw-terminal connections for circuit breaker 3RV2, ensuring straightforward installation without additional interface hardware.