SIRIUS motor-protective circuit breaker, CLASS 10, 100 kA
Rated breaking capacity reaches 100 kA at 240 V, 400 V, 500 V, and 690 V AC — that is the fault current level it can safely interrupt without welding contacts or cascading failure upstream. For a panel builder, that SCCR headroom simplifies coordination with a downstream contactor and upstream feeder breaker. No ground-fault detection on this variant.
Clearance distances: 20 mm upwards and downwards, 9 mm to the side, zero forwards or backwards (–). That is the free air gap needed around the arc chamber for safe fault interruption — respect it in a crowded enclosure. Main circuit terminals accept 2× (0.5…1.5 mm²) or 2× (0.75…2.5 mm²) solid or stranded wire, screw-type.
