Siemens 3RV2111-1BA10 SIRIUS 3RV2 motor starter protectors. Siemens 3RV2111-1BA10 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 1.4...2 A short-circuit release 26 A screw terminal standard switching capacity.