Siemens 3RV1721-1ED10 Three Pole Circuit Breaker

Siemens 3RV1721-1ED10 is a three-pole circuit breaker in size S0, designed for plant protection in industrial electrical installations. This UL 489-listed device (CSA C22.2 No.5-02 compliant) uses screw-terminal connections for secure wiring in control panels. It carries Siemens’ release ratings: A-release 4 A and N-release 52 A, reflecting its preconfigured protection settings for different circuit configurations. With three poles, it interrupts all phases simultaneously to protect 3-phase feeders and associated equipment in industrial environments. The 3RV1721-1ED10 is intended for use in panel assemblies that require UL 489-listed protection and a compact, screw-terminal form factor, offering standard switching capacity appropriate for its size. Common applications include plant protection schemes and motor-control feeder configurations within industrial automation panels where reliable, code-compliant overcurrent protection is required.