The Schneider Electric A9N4P25DIN is an Acti9 xC60 miniature circuit breaker — 4 poles, 25 A rated current, D-curve trip characteristic, rated to IS/IEC 60947-2.
Breaking capacity and duty
Breaking capacity is 10 kA Icn at 380–415 V AC 50/60 Hz and 6 kA Icu at 220–250 V DC. For a 25 A distribution board fed from a transformer of typical impedance, 10 kA covers most commercial and light-industrial installations in IEC 60947-2 Category A. The DC rating matters for battery-backed or solar-combiner circuits — 6 kA at 250 V DC is not a universal match for every string combiner, but it is a real figure to check against your worst-case fault current.
The Acti9 range is Schneider's current-generation DIN-rail MCB family, so the A9N4P25DIN is the standard production order code for a 25 A D-curve 4P breaker.
Integration notes
Mounts via clip-on to 35 mm DIN rail. Tightening torque 2 N·m.