The A9KF71416BQ is a Schneider Electric Acti9 K60 miniature circuit breaker rated 16 A with a C-curve magnetic trip (5 to 10 times In). That 10 kA Icn at 415 V AC per EN/IEC 60898-1 means it can safely interrupt fault currents up to 10,000 A in a 415 V AC distribution panel — enough headroom for most commercial and light industrial sub-distribution boards where the prospective short-circuit current stays under that threshold. The thermal-magnetic trip unit handles overloads (thermal bimetal) and short-circuits (magnetic coil) in one compact package, with 20,000 electrical and 20,000 mechanical cycles giving a solid service life for a panel that sees regular switching.
Tunnel terminals accept 1–25 mm² rigid or 1–16 mm² flexible copper, with a 2 N·m tightening torque and 14 mm strip length. IP20 finger-safe terminals are standard for enclosed panels; the IP rating is for the terminal area only, not the breaker body in a wet environment.