Circuit breaker size S0 for motor protection CLASS 10 A-release 0.7 …1 A Short-circuit release 13 A Screw terminal Standard switching capacity, -E01. Circuit breaker size S0 for motor protection CLASS 10 A-release 0.7 …1 A Short-circuit release 13 A Screw terminal Standard switching capacity, -E01 3RV1021-0JA10 Siemens is a reliable circuit breaker suitable for industrial applications. This high-quality product can be purchased at PLC2Day for all your electrical protection needs.