The Schneider Electric A9N3P25CGN is an Acti9 xC60 miniature circuit breaker — a 3-pole, 25 A thermal-magnetic MCB with a C-curve trip characteristic, designed for distribution boards on 35 mm DIN rail. It clips on, terminates tunnel-type terminals up to 25 mm² rigid, and carries a 10 kA breaking capacity at both 240 V and 415 V AC per IS/IEC 60898-1. The C-curve (magnetic trip at 5–10× In) suits it for general-purpose branch circuits with moderate inrush — think lighting panels, socket outlets, or small motor feeders where the start-up surge stays under 10× the rated load.
Rated at 10 kA Icn at both 240 V and 415 V AC (50/60 Hz), this MCB can clear a fault up to 10 kA without welding or arc-over. That is the standard domestic and light-commercial fault level in many IEC markets; if your upstream transformer or service entrance can deliver more than 10 kA prospective short-circuit current, you need a higher-rated breaker upstream or a current-limiting device to keep the let-through within this MCB's capability. The 3-pole version (3P) switches all three phases simultaneously, which is what you want for a three-phase distribution sub-feed or a motor branch — no shared neutral pole.
Integration notes
The IP20 finger-safe front allows panel mounting without additional shrouding.