Motor protection circuit breaker, SIRIUS 3RV2011-1JA10-0BA0
Sizing and coordination
The gG fuse backup limits: at 400 V it coordinates with a 50 A gG fuse, at 500 V and 690 V with 40 A gG. That matters for selectivity — if the breaker sees a fault beyond its interrupting rating, the upstream fuse clears instead of the breaker failing. Power rating at 230 V is 2.2 kW, which lines up with a standard 3 HP motor at 230 V single-phase or a small three-phase motor.
It needs 50 mm clearance upward and downward, 30 mm to the side, and zero forward or backward — so it fits tight against the back panel. Screw terminals accept up to 2x 2.5 mm² or 2x 4 mm² solid/stranded. Mounting position is any, which helps in crowded enclosures where you might need to rotate the rail.
