Siemens 3RV2742-5CD10 Sirius Circuit Breaker

Siemens Sirius 3RV2742-5CD10 is a size S3 motor protection circuit breaker from the SIRIUS 3RV2 family, purpose-built for system protection in industrial motor circuits. It carries UL 489 and CSA C22.2 No.5-02 approvals and specifies an A-release rating of 20 A with a N-release of 260 A, with screw terminals for secure, simple wiring. The unit is designed for use in systems up to 690 V AC and supports ordering of lateral and transverse auxiliary switches to tailor control options in a panel or motor starter assembly. Typical applications include motor protection in equipment such as pumps, conveyors, and fans where compact protection within a control cabinet is required, leveraging the compact S3 form factor and the Sirius lineage for reliable overload and short‑circuit protection.