Siemens 3RV1742-5AD10 Molded Case Circuit Breaker

Siemens 3RV1742-5AD10 is a three-pole Sirius molded‑case circuit breaker (size S3) designed for plant protection with UL 489 and CSA C22.2 No.5-02 approvals, rated for up to 690 V AC. It uses an A‑trigger of 10 A and an N‑trigger of 150 A for short‑circuit protection coordination, with screw‑terminal connections and removable auxiliary/control terminals for wiring flexibility. The main circuit comprises 3 poles and the front is IP20 protected; the device supports about 50,000 mechanical switching cycles and 6,000 V impulse voltage resistance, and is rated for ambient temperatures from -20 to +70 C at elevations up to 2,000 m; it withstands 25 g / 11 ms shock. Typical active power loss is 8 W. This unit is intended for distribution protection in industrial panels, safeguarding feeders and motors in plant protection applications where a compact, standards‑compliant three‑pole breaker is required.