The Schneider Electric A9F68204 is an Acti9 iT60 miniature circuit breaker rated at 4 A with a C-curve magnetic trip (8 x In ±20 %), 2-pole configuration, and a 50 kA ultimate breaking capacity (Icu) at 380–415 V AC per EN/IEC 60947-2. It also carries a 10 kA Icn rating at 400 V AC per EN/IEC 60898-1, so it meets both the higher-fault industrial standard and the residential/commercial standard on the same device — useful when a panel must satisfy both a utility requirement and an internal plant spec. The C-curve means the magnetic trip activates between 5 and 10 times the rated current (here 8 x In ±20 %), making it the standard choice for general distribution circuits feeding mixed resistive and moderate inductive loads — lighting, socket outlets, small motor starters — where inrush isn't severe enough to need a D curve but a B curve would nuisance-trip on start-up.
Snaps onto a DIN rail (mounting support: DIN rail per) and occupies 36 mm width (4 x 9 mm pitches). The removable comb busbar is installed from the factory, so busbar alignment is pre-set — no fiddling with loose bridges on site. Terminals accept 1–25 mm² rigid or 1–16 mm² flexible, with a 2 N·m tightening torque and 14 mm strip length.
Rated for operation from -35 °C to 70 °C ambient, storage from -40 °C to 85 °C, with 95 % relative humidity tolerance and tropicalisation level 2 per EN/IEC 60068-2-78. Overvoltage category IV suits it for main distribution board installation, not just sub-circuits.