What this part is and where it fits
The Siemens SIRIUS 3RV1011-1GA10-ZI45 is a motor protection circuit breaker in size S00, designed to protect three-phase motor circuits against overload and short-circuit faults. It carries a CLASS 10 trip class, meaning it will trip within 10 seconds under a locked-rotor condition — fast enough to protect standard induction motors during start-up without nuisance tripping. The overload release is adjustable from 4.5 A to 6.3 A, and the rated operating current is 6.3 A, so it fits motors in that full-load current band. Mounting is via screw and snap-on onto 35 mm DIN rail per DIN EN 60715, and the mounting position is any — no derating needed for horizontal or vertical orientation in the panel.
Integration notes
Screw-type terminals on the main current circuit accept solid or stranded copper; the S00 frame keeps the width to 45 mm, so it fits a standard DIN-rail footprint alongside contactors and auxiliary blocks. Power loss at rated current in hot operating state is 7.25 W total (2.4 W per pole), which is low enough that no special ventilation is needed in a typical IP20 enclosure.