The Siemens 3RV1011-0JA20 is a SIRIUS motor protection circuit breaker rated for 1 A continuous current with a CLASS 10 trip characteristic, sized for a 0.25 kW motor at 400 V AC. It delivers a 100 kA breaking capacity across the 240 V to 690 V range, so it can interrupt high fault currents without upstream fusing in most panel designs. The spring-loaded terminals on both main and auxiliary circuits accept 2x (0.25... 2.5 mm²) solid or 2x (0.25... 1.5 mm²) finely stranded with ferrule, which matches the wiring practice for control panels feeding motor starters.
IP20 finger-safe front protection allows panel-front access without additional shrouding. Any mounting position is permitted, which simplifies layout in crowded enclosures.
Protection and duty cycle
Rated for 15 operations per hour at AC-3 duty, which covers frequent starting cycles on conveyors or pumps. Power dissipation is 5.5 W total (1.8 W per pole) at rated load in hot operating state; account for this heat in enclosure sizing.