Siemens Circuit breaker for motor protection, size S0, 82AProduct Overview The Siemens 3RV2021 1GA15 is a motor protection circuit breaker in size S0 designed for reliable protection and manual switching of three phase motors. It features a CLASS 10 thermal overload release with an adjustable setting range of 4. 56. 3 A, an instantaneous short circuit release (N release) of 82 A, screw terminals for secure wiring, standard switching capacity, and integrated auxiliary contacts (1 NO + 1 NC). This compact