What this MCB delivers
The A9F03713 is a Schneider Electric Acti9 iC60N miniature circuit-breaker rated 13 A, 3P+N, curve B. Thermal-magnetic trip unit, so it handles both overload (thermal bimetal) and short-circuit (magnetic coil) protection in one package. Curve B means magnetic tripping occurs at 4 x In ±20 % — that is 52 A minimum — making it suited for resistive or lighting loads where inrush is low. The 36 kA Icu at 12…133 V AC (EN/IEC 60947-2) is the interrupting capacity under industrial fault conditions; the 6000 A Icn at 400 V (EN/IEC 60898-1) governs residential/commercial coordination. For a 13 A circuit, that is substantial headroom — selectivity with upstream devices is straightforward. Mounts on DIN rail, 72 mm wide (8 x 9 mm pitches). Suitability for isolation marked per both standards — pull the toggle and the contact position indicator confirms open.
Overvoltage category IV (equipment at the origin of the installation, before the main distribution board).