SIRIUS 45 A circuit breaker for starter combinations
It handles motor loads up to 22 kW at 400 V under AC-3 duty, meaning it's sized for a standard 22 kW motor on a 400 V line — a common sweet spot for pumps, fans, and small conveyors. The 50 kA short-circuit breaking capacity at 400 V gives it enough interrupting ability for most industrial panel feeds without needing upstream fuses for fault protection. The 55 mm width means it takes up one standard 55 mm module on the rail — plan your enclosure layout accordingly.
Panel integration
Dimensions: 55 mm wide, 140 mm high, 149 mm deep. The 149 mm depth is the body depth behind the panel — account for wiring space in front. Zero clearance needed at the back or sides, so you can pack modules tight on the DIN rail. The screw-type box terminals for the main circuit and separate screw terminals for auxiliary/control keep power and signal wiring separate. An auxiliary switch can be added for remote status indication. Shock resistance is 25g for 11 ms — fine for normal industrial vibration, but verify if mounting near a large impact source like a stamping press.