The Siemens SIRIUS 3RV1011-0JA10-ZW95 is a motor protection circuit breaker designed to protect motors against overload and short-circuit faults. It carries a 100 kA breaking capacity at 400 V AC, meaning it can safely interrupt fault currents up to that level without upstream fuses needing to clear — a key spec for high-fault panels where you want to avoid cascading failures.
Trip Class and Protection Features
Rated Trip Class 10, so it trips within 10 seconds at 7.2× the thermal setting — standard for protecting standard induction motors during startup. Phase failure detection is built in, which prevents single-phasing damage on a motor that loses a phase. No ground fault detection on this variant, so if your application requires that, you'd need a separate ground-fault relay or a different SIRIUS model.
Mounting and Integration
Mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715, in any position. The 45 mm width and 75 mm depth fit standard panel layouts — it occupies one 45 mm slot on the rail, leaving room for auxiliary contact blocks or a downstream contactor in the same footprint. Clearance requirements: 20 mm above and below, 9 mm to the side, zero forwards or backwards — tight enough for dense panels if you respect the ventilation gaps.