The Siemens SIRIUS 3RV1041-4LA10-ZW97 is a motor-protection circuit breaker rated for 90 A continuous current, switching 45 kW at 400 V with a Class 10 trip characteristic. For a panel-builder, that means no special tooling beyond a standard screwdriver, and the 70 mm² stranded capacity handles the feed from a 90 A motor starter without a separate terminal block.
Breaking capacity and fault clearing
At 240 V it handles 100 kA, at 500 V it drops to 8 kA, and at 690 V to 5 kA. The 690 V rated value of the device is 690 V, so it can live on a 690 V line but the fault current at that level needs to stay under 5 kA.
The 70 mm width and 165 mm height fit a standard 8-module row in a 600 mm enclosure. Depth is 174 mm, so it clears a 200 mm deep gland plate with room for wiring.