What it is and what it does
The Siemens 5SL6110-8CC is a 1-pole miniature circuit breaker from the SENTRON 5SL series, rated 10 A with a D tripping characteristic. It breaks fault currents up to 6 kA per EN 60898 at 230/400 V AC, single- or multi-phase. The D-curve means it tolerates high inrush currents — think motor starts, transformer energization, or capacitive loads — without nuisance tripping, while still clearing a hard short fast.
Where it fits and how it mounts
Snaps onto a standard DIN rail, one width unit (18 mm). Depth is 76 mm, installation depth 70 mm — leaves clearance for wiring behind the panel door. Mounting position any, so it works upright, sideways, or inverted inside a crowded enclosure. Rated IP20 with connected conductors, so it's intended for dry indoor panels, not washdown zones.
What the ratings mean for your panel
Rated 10 A at 400 V AC, 50 Hz. The D-curve's magnetic trip threshold is 10–20× In (100–200 A), so it's sized for loads with a high starting surge — small motors, solenoid banks, or power supplies with large input caps. The 6 kA breaking capacity per EN 60898 is the standard domestic/commercial fault level; if your available fault current exceeds that, you need an upstream current-limiting device or a higher-rated breaker. Overvoltage category III and pollution degree 2 suit fixed installations inside a building's distribution board. Sealable terminals let you lock the setting after commissioning — useful for tenant or process areas where you don't want the breaker switched off casually.