Siemens 3RV1021-1CA10 Circuit Breaker Class10

Siemens Sirius 3RV1021-1CA10 is a motor-protection circuit breaker in the S0 size with Class 10 thermal-magnetic release, featuring an overload setting of 1.8–2.5 A (A-release) and a 33 A short-circuit release, plus screw terminals for straightforward wiring and an IP20 front. The device is documented as a phased-out product, with Siemens identifying 3RV2011-1CA10 as its successor, and it is compatible with DIN rail mounting for easy integration into control panels. Additional verified details include an auxiliary switch option, a typical power loss of 6 W, a surge withstand of 6,000 V, and a mechanical life around 100,000 switching cycles. Common applications include protection for small to medium motors in industrial control panels such as pumps, conveyors, and fans, where precise overload tuning and reliable short-circuit protection are required.