What this breaker does in the panel
The Siemens 3RV1011-1JA15-ZI45 is a SIRIUS motor protection circuit breaker in size S00, designed to protect a motor branch circuit against overload and short-circuit in one device. Its CLASS 10 trip class 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 starts. The adjustable overload release covers 7 to 10 A, and the magnetic short-circuit release is fixed at 130 A. At 400 V it is rated for 4 kW motor load. It snaps onto 35 mm DIN rail per DIN EN 60715 and accepts screw-type terminals top and bottom for the main circuit.