The Siemens SIRIUS 3RV2011-0GA25-ZW96 is a motor protection circuit breaker designed to protect motors against overload and short-circuit. It is Trip Class 10, meaning it will trip within 10 seconds at 7.2× the rated current — fast enough to protect standard induction motors during a locked-rotor event. The unit carries a 100 kA short-circuit breaking capacity at 400 V, so it can interrupt a fault up to that level without upstream fuses needing to clear first. Phase failure detection is built in, which catches a lost phase before single-phasing damages the motor winding.
Mounting and clearance
Mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715. The 45 mm width takes up a single 9 mm modular unit — five units wide — so it fits standard panel layouts. Clearance requirements: 50 mm above and below, 30 mm at the sides, and zero forwards or backwards. That zero forwards/backwards clearance means it can be mounted flush against a backplate or enclosure wall, saving depth in tight cabinets. The 97 mm depth is the body depth; account for wiring space in front of the spring-loaded terminals.
Ratings and what they mean
The 100 kA SCCR at 400 V means this breaker can safely interrupt a fault current up to 100,000 A without welding its contacts or rupturing. That is a high interrupting rating for a 45 mm wide device — it lets you place it close to a large transformer without needing upstream current-limiting fuses. The auxiliary contact ratings (1 A at 24 V, 0.5 A at 120 V, 0.5 A at 230 V) are for the integrated signal contact; they handle PLC or relay coil loads directly. The 0.1 kW at 230 V rating is the motor power the breaker can protect at that voltage — it is sized for small motors, not large drives. The maximum operating frequency of 15 switching operations per hour (AC-3) means it is intended for occasional motor starting, not continuous jogging or high-duty-cycle applications.