Siemens 3RV1021-1GA10 Circuit Breaker

Siemens 3RV1021-1GA10 is a 3-pole Sirius motor-protection circuit breaker (size S0) designed for DIN-rail mounting in 3‑phase motor circuits. It provides overload protection via an A-rel thermal release adjustable from 4.5 A to 6.3 A and a fixed N-rel short-circuit release rated at 82 A, enabling responsive protection against both sustained overloads and brief faults. The device is intended for 220–690 VAC service and, in typical motor applications, supports about 2.2 kW of motor protection at standard voltages. It uses screw terminals for wiring and is part of Siemens’ Sirius 3RV family; however, it has been discontinued with the stated successor 3RV2011-1GA10.