The Siemens SENTRON 5SQ2270-2YA06 is a 2-pole miniature circuit breaker with a C-curve trip characteristic rated at 6 A and a 3 kA breaking capacity per EN 60898 at 400 V AC. Rated at 6 A at 30 °C, it derates to 5.55 A at 40 °C, 5.37 A at 45 °C, 5.22 A at 50 °C, 5.01 A at 55 °C, and 4.8 A at 60 °C. That derating curve is the real-world rating — if your panel ambient runs 50 °C, you're sizing for 5.22 A continuous, not 6 A. Overvoltage category 3 and pollution degree 3 mean it's rated for fixed-installation panels where transients and conductive dust are expected — standard for industrial control cabinets. The 2-pole design includes neutral conductor switching (the 'N' in the description), so it breaks both phase and neutral when tripped — useful where you need full isolation on a single-phase or split-phase circuit.
Installation depth is 55 mm — fits standard distribution boards and sub-panels without crowding.