The Schneider Electric A9F04163 is a 1-pole Acti9 iC60N miniature circuit breaker rated 63 A with a C curve. Breaking capacity is 36 kA Icu at 12-60 V AC and 20 kA Icu at 100-133 V AC per EN/IEC 60947-2, with an Icn of 6 kA at 230 V AC per EN/IEC 60898-1. That 36 kA figure at low voltage means this breaker handles high prospective fault currents common in transformer-fed panels without cascading upstream.
Trip curve and coordination
The C curve has a magnetic tripping threshold of 8 x In ±20 %, so it holds through motor inrush and capacitive loads up to roughly 500 A instantaneous before tripping. This makes it a standard choice for general distribution where moderate inrush exists but not the high peaks of a D curve.
Termination and environment
Double terminals accept 1-35 mm² rigid or 1-25 mm² flexible cable, with a tightening torque of 3.5 N.m and strip length of 14 mm. The IP20 finger-safe front and tropicalisation level 2 per IEC 60068-1 (95 % RH at 55 °C) mean it holds up in humid panel environments without condensation tracking.