The Siemens 5SL6506-7CC is a SENTRON miniature circuit breaker (MCB) — a 1P+N, 2-pole unit with a C-curve trip characteristic, rated 6 A at 230 V AC and a 6 kA breaking capacity per EN 60898. The 6 kA rating is the standard fault-interruption level for most domestic distribution boards in Europe. That's a standard SENTRON 5SL-series footprint; it drops into any panel already kitted with that family.
At 40 °C it derates to 5.66 A; at 50 °C to 5.29 A; at 55 °C to 5.1 A. That's the number to use for a real load calculation, not the 30 °C figure.
Sealable, halogen-free, silicon-free. Touch protection is included on the terminals. Neutral conductor switching is built in (1P+N design), so the neutral pole opens and closes with the phase. That's required in some regional wiring codes and useful for full isolation on the load side.