The Schneider Electric A9N4P25CGN is a 4-pole Acti9 xC60 miniature circuit breaker rated 25 A with a C-trip curve, built for distribution boards on 35 mm DIN rail. The C curve (magnetic trip 5–10× In) handles moderate inrush from motor starters and lighting ballasts without nuisance tripping, while the 10 kA Icn breaking capacity at both 240 V and 415 V AC covers most commercial and light industrial fault levels under IS/IEC 60898-1.
The 25 A continuous rating (In) sets the maximum load current the breaker carries without opening — size the downstream conductor and load for this figure, not the bus rating. The C curve's 5–10× In magnetic trip window means it holds through transformer energization and motor start peaks but clears fast on hard shorts. The thermal-magnetic trip unit combines a bimetal strip for overload protection (time-delayed) and a solenoid for short-circuit protection (instantaneous above the magnetic threshold).
The IP20 finger-safe terminals suit enclosed panels only; no washdown rating.