The Siemens 3RV1021-0HA10-ZW97 is a SIRIUS motor protection circuit breaker rated for 0.8 A continuous current with a 100 kA breaking capacity across 240 V to 690 V AC, making it suitable for high-fault-current industrial panels where a standard MCB would not hold. It snaps onto a 35 mm DIN rail per EN 50022 and occupies 45 mm width, so it fits standard panel layouts without extra bracketing. The Class 10 trip characteristic means it clears overloads within 10 seconds at 7.2× rated current, matching the thermal protection curve of most standard induction motors.
Integration Notes
Screw-type terminals on both main and auxiliary circuits accept 1–2.5 mm² solid or stranded (two conductors per clamp) and 2.5–6 mm² for larger feeds, so it handles mixed wire sizes common in retrofit panels. Mounting position is any orientation, and the IP20 front protection keeps fingers away from live parts inside the enclosure. Phase failure detection is built in; ground fault detection is not, so for GFCI applications an external residual-current device is needed.