Motor-protective circuit breaker for a 0.09 kW motor branch
The Siemens SIRIUS 3RV1021-0DA10-ZW96 is a 3-pole motor-protective circuit breaker rated at 0.32 A continuous current, sized for a 0.09 kW motor at 400 V AC. Its Class 10 trip characteristic clears overloads within 10 seconds at 7.2× rated current, matching the thermal curve of standard induction motors during start-up. The interrupting rating reaches 100 kA at 400 V AC, meaning it can safely break a bolted fault up to that level without upstream fuses — a key figure for high-fault-capacity MCCs or distribution panels where coordination with a downstream contactor is required.
DIN-rail integration and panel envelope
Mounts via screw and snap-on onto a 35 mm standard mounting rail per DIN EN 50022. The 45 mm width and 97 mm height fit a standard 45 mm modular-device slot; depth is 96 mm. Any mounting position is permitted, and zero clearance is required at the rear or sides, so it can be packed tightly against other devices on the rail. IP20 on the front means protected against finger contact — suitable for enclosed panel installation, not for exposed outdoor use.