Siemens 3RV1742-5HD10 Molded Case Circuit Breaker

Siemens 3RV1742-5HD10 is a three-pole molded-case circuit breaker (size S3) designed for plant protection in industrial electrical systems. This UL 489 and CSA C22.2 No. 5-02 listed device uses screw terminals and is offered with standard switching capacity, making it suitable for feeders, panel boards, and other protection applications in control and distribution schemes. It is rated for 45 A nominal current (In) in the compact S3 frame and is intended for three‑phase service where reliable overload and short‑circuit protection are required. The 3RV1742-5HD10 is part of the SIRIUS 3RV1 family of molded‑case breakers, a line commonly used in industrial equipment protection that conforms to UL and CSA requirements and is suitable for integration in systems needing certified protection devices. Its form factor and termination style are compatible with standard industrial enclosures, enabling straightforward mounting and wiring in control panels and small switchgear assemblies.