The Siemens SIRIUS 3RV1011-0FA10-ZI45 is a motor protection circuit breaker in the compact S00 frame, designed to protect small induction motors against overload and short circuit. Its CLASS 10 trip characteristic means the overload release responds within 10 seconds at 7.2× the set current — fast enough to protect standard squirrel-cage motors from stall damage without nuisance tripping during normal start-up.
Key ratings and what they mean for fit
The adjustable overload release covers 0.35 to 0.5 A, so this breaker is sized for the smallest motor loads — fractional-horsepower pumps, fans, or conveyor drives drawing under half an amp. The magnetic short-circuit trip responds at 6.5 A (fixed), giving a clean selectivity window above the start-up inrush. Rated operational current is 0.5 A at 400 V, with a switching capacity of 100 kA at 400 V AC — that SCCR rating lets it interrupt a hard fault without cascading upstream, even on high-capacity distribution. Mounts on a 35 mm DIN rail per EN 60715, screw or snap-on, in any position. The S00 footprint (45 mm wide) saves panel space — three poles in a single module width. Screw terminals accept up to 2.5 mm² stranded or solid, top and bottom entry.