Siemens 3RV2721-4BD10 Molded Case Circuit Breaker

Siemens 3RV2721-4BD10 is a three-pole molded‑case circuit breaker (frame size S0) engineered for system protection in industrial wiring, with UL 489 and CSA C22.2 No. 5-02 approvals and a screw-terminal connection for durable panel mounting. It belongs to the Sirius 3RV2 family and carries a nominal current rating of 20 A, with a current‑dependent overload release adjustable from 14 to 20 A and a short‑circuit release rated at 260 A, enabling reliable protection against overloads and faults in 3‑phase circuits. The device includes IP20 protection on the front and a three‑pole main circuit, designed for standard switching capacity and long mechanical/electrical life—up to 100,000 switching cycles—making it well suited for motor protection, pumps, and other machine protection in control panels.