Motor protection circuit breaker for the 1 A line
The Siemens SIRIUS 3RV1011-0JA10-ZI45 is a motor protection circuit breaker in the compact S00 frame, sized for a 1 A rated operating current with an adjustable overload release spanning 0.7 to 1 A. Its CLASS 10 trip characteristic means it will trip within 10 seconds at 7.2× the set current — fast enough to protect standard induction motors during a locked-rotor event without nuisance tripping on normal starting inrush. The breaker combines a thermal overload release (for sustained overcurrent) and a magnetic short-circuit trip for fault clearing, all in a three-pole package with screw-type terminals arranged top and bottom for straightforward line and load wiring. Mounting is via screw and snap-on onto 35 mm standard mounting rail per DIN EN 60715, in any position. The S00 frame width of 45 mm means it occupies a single DIN-rail module space, which simplifies panel layout when grouping multiple motor starters. Power dissipation runs 5.5 W total (1.8 W per pole) in the hot operating state — worth factoring into enclosure thermal calculations if the panel is densely packed.