What this MCB does in the panel
The SENTRON 5SQ2160-2YA06 is a 1-pole miniature circuit breaker with a B tripping characteristic rated 6 A at 240 V AC, breaking 3 kA per EN 60898. At 40 °C ambient the continuous rating derates to 5.55 A; at 60 °C it drops to 4.8 A, so a panel sitting near a hot drive or transformer needs the next size up or forced ventilation. IP20 means finger-safe terminals but no protection against dripping water or washdown — keep this inside a sealed enclosure, not in a wet-well cabinet or outdoors.