The A9F56103 is a 1-pole Acti9 IKQ miniature circuit breaker rated 3 A with a B-curve, meaning its magnetic trip activates between 3 and 5 times the rated current (9–15 A). The 10 kA breaking capacity (Icn at 240 V AC, 50/60 Hz, per EN 60898-1) tells you this MCB can safely interrupt a fault current up to 10,000 A at the panel voltage; for most commercial and light industrial distribution boards fed by a transformer of typical impedance, that is enough to clear a bolted fault without the upstream device having to back it up.
The bottom terminal accepts 1–25 mm² rigid or 1–16 mm² flexible, with a tightening torque of 2 N·m and a wire strip length of 14 mm. A padlock provision and trip indicator are built into the toggle — useful for lockout/tagout on a lighting or control circuit where you need visual confirmation the breaker is open.