SIEMENS 3RV2021-4NA20-0BA0 – Circuit breaker | JUAL SIEMENS 3RV2021-4NA20-0BA0 – Special type Circuit breaker size S0 for motor protection, CLASS 10 A-release 23…28 A N-release 364 A Spring-type terminal Standard switching capacity Ambient temperature -50 °C 500 switching cycles