The Schneider Electric A9N1P03CGN is an Acti9 xC60 miniature circuit breaker — a 1-pole, 3 A thermal-magnetic MCB with a C-curve (magnetic tripping between 5 and 10 times In).
Rated breaking capacity is 10 kA Icn at 240 V AC, 50/60 Hz, per IS/IEC 60898-1. That's the standard domestic and light commercial short-circuit rating for this class — adequate for most final distribution boards where the upstream device limits prospective fault current. The C-curve means it holds magnetic trips for inrush-heavy loads (small motors, transformers, lighting ballasts) while still clearing fast on hard shorts.
Depth is 77.5 mm, height 85 mm. Overvoltage category IV (suitable for main incoming panels). Pollution degree 3 (condensation and conductive pollution allowed). Tightening torque 2 N·m.