Siemens 3RV1742-5DD10 Circuit Breaker

The Siemens SIRIUS 3RV1742-5DD10 is a three‑pole Size S3 circuit breaker designed for plant protection, rated for 690 V and 25 A with an N‑trigger short‑circuit release of 325 A and an A‑release of 25 A, all built to UL 489 and CSA C22.2 No.5‑02 approvals. It uses screw terminals, includes an auxiliary switch, and provides standard switching capacity for industrial power distributions. Key specs include front IP20 protection, surge voltage resistance up to 6,000 V, a typical power loss of 12 W, operation from -20 to +60 °C, and installation up to 2,000 m above sea level. The main contacts offer about 50,000 mechanical switching cycles, and the overload release is adjustable with a 25 A setting. This three‑phase device is suitable for protecting motors, feeders, and control circuits in plant‑level electrical systems while complying with applicable UL/CSA standards. Note: this model is a phased‑out product with a recommended successor in the SIRIUS line (3RV2742-5DD10).