The Siemens series SIRIUS Special type Circuit breaker size S00 for motor protection and CLASS 10 A-release current 2.2-3.2 A N release 42 A. screw terminal Standard switching capacity Ambient temperature -50 °C 500 switching cycles. Circuit breaker for motor protection shuts down safe in the event of a short circuit and protection of the loads and system against overload, as well as for safe separation of the system from the network. The 3RV2 circuit breakers replace the 3RV1 series because it proved to be more efficient, simple and up to date.