The Siemens SENTRON 5SL6106-6RC is a 1-pole miniature circuit breaker rated 6 A with a B tripping characteristic and a 7.5 kA breaking capacity per EN 60898.
The B characteristic means the breaker trips between 3 and 5 times rated current — 18 A to 30 A — which suits resistive and lighting loads with low inrush. The 7.5 kA breaking capacity (per EN 60898) tells you it can safely interrupt a fault current up to that level at the rated voltage; for most residential panels with a typical prospective short-circuit current under 6 kA, this provides headroom. The 6 A rating at 30 °C ambient is the continuous current the breaker carries without tripping; derate if the panel ambient exceeds 30 °C. Rated for AC operation up to 415 V (single-phase 250 V, multi-phase 440 V max) and DC up to 72 V.
One modular width (18 mm) means it occupies a single slot in the distribution board. Mounting position is any — vertical, horizontal, or upside-down — which simplifies panel layout. Sealable terminals allow the installer to lock the cover after commissioning, preventing tampering.