Siemens 3RV2111-0CA10 SIRIUS 3RV2 motor starter protectors. Siemens 3RV2111-0CA10 is the exact printed commercial reference for a motor protection circuit breaker in the SIRIUS 3RV Motor Protection range. Siemens' official product description is: circuit breaker frame size S00 for motor protection, Class 10 with overload relay function thermal release 0.18...0.25 A short-circuit release 3.3 A screw terminal standard switching capacity.