The Schneider Electric A9N4P04CIN is a 4 A miniature circuit breaker from the Acti9 xC60 range, designed for distribution applications per IS/IEC 60947-2. The four-pole configuration (4P) makes it the right choice for three-phase plus neutral circuits where all poles need coordinated overcurrent protection.
Rated breaking capacity is 10 kA Icn at 380–415 V AC 50/60 Hz per IS/IEC 60947-2, with a DC rating of 6 kA Icu at 220–250 V DC. For DC circuits, the 6 kA at 250 V DC covers battery-backed control buses and solar combiner boxes within that voltage ceiling. Limitation class 3 per the same standard means it limits let-through energy on high-fault currents — useful for downstream component protection.
The 72 mm width (9 mm pitches × 8) occupies four modular spaces on the rail. Tightening torque spec is 2 N·m. IP20 finger-safe protection means it is intended for enclosed panel installation, not exposed outdoor use.