Breaking capacity and voltage ratings
The 5SN6106-8CP: Rated 6 kA per EN 60898 and 30 kA per IEC 60947-2. That dual rating covers both residential/commercial branch circuits (EN 60898) and industrial panel applications (IEC 60947-2) where higher fault current is expected. DC rated maximum is 72 V — useful for control circuit protection in DC bus applications.
DIN-rail footprint and wiring
Accepts solid conductors up to 35 mm² — that's a heavy feed for a 1-pole MCB, typically used for incoming supply tails or large-gauge branch circuits.
Power loss and thermal considerations
For a single-pole breaker in a crowded DIN rail, that's modest — no special derating needed in standard enclosures, but worth noting if grouping many breakers in a sealed box.