What this breaker does in the panel
The Siemens SIRIUS 3RV2011-1AA10-ZW96 is a motor protection circuit breaker designed to protect motor branch circuits against overload and short-circuit faults. It snaps onto a 35 mm DIN rail per DIN EN 60715 and occupies a 45 mm wide footprint — a standard single-module slot that fits neatly into a motor control center or distribution panel. Trip Class 10 means it disconnects within 10 seconds at 7.2× the thermal setting, matching the starting profile of standard induction motors. Phase failure detection is built in, so a lost phase on the line side will trip the breaker rather than letting the motor single-phase and burn. The breaking capacity is 100 kA at 400 V AC (also 100 kA at 240 V, 500 V, and 690 V), which means it can safely interrupt very high fault currents without upstream fuses needing to clear first. That 100 kA rating covers most industrial service-entrance and sub-distribution scenarios.
Motor sizing and trip coordination
This breaker carries a motor rating of 1 hp at 460/480 V and 0.8 hp at 575/600 V. At 230 V it is rated 0.1 hp. The thermal overload setting range is not listed in the spec excerpt, but the 20...690 V rated value covers the full low-voltage motor range. For a 1 hp 480 V motor, this breaker provides coordinated protection without needing a separate overload relay in most panel designs.
Mounting and wiring
Mounting position is any, with screw and snap-on onto 35 mm standard rail. The main circuit terminals are M3 screw-type, accepting 2x (0.75 to 2.5 mm²) solid or stranded, or 2x 4 mm². Clearance: 50 mm upwards and downwards, 30 mm to the side, 0 mm forwards and backwards — so it can be packed tight against a backplane or adjacent devices as long as vertical airflow and wiring space are respected.