Siemens 3RV1742-5ED10 Molded Case Circuit Breaker

The Siemens 3RV1742-5ED10 is a three-pole, S3-frame molded-case circuit breaker from the SIRIUS family, specified for plant protection with UL 489 and CSA C22.2 No. 5-02 approvals and featuring screw-terminal connections. This device supports an auxiliary switch option and provides a main-tripping mechanism with an A‑trigger rating of 30 A and an N‑trigger rating of 390 A, enabling robust short‑circuit and overload protection across a 3‑phase supply, with impulse‑voltage resistance up to 6,000 V and IP20 front protection. Built for endurance, it offers a mechanical service life of about 50,000 switching cycles for the main contacts and is designed for panel installations in industrial environments where compatibility with Siemens accessories and mounting simplifies integration. The 3RV1742-5ED10 is well suited for protecting motor feeders and distribution circuits in control panels, delivering reliable interruption and clear trip signaling in standard Siemens SIRIUS configurations.