The Schneider Electric A9N1P25DGN is a 1-pole miniature circuit breaker from the Acti9 xC60 range, rated 25 A with a D tripping curve. The D curve means magnetic tripping between 10 and 14 times rated current. That curve suits loads with high inrush — motor starters, transformers, discharge lighting.
Breaking capacity is 10 kA Icn at 240 V AC, 50/60 Hz, certified to IS/IEC 60898-1. Thermal-magnetic trip unit — thermal element handles overloads (slow, I²t curve), magnetic coil handles short-circuits (instantaneous above the D-curve threshold). IP20 enclosure — fingersafe terminals but not sealed. Mount it inside a cabinet, not in a washdown zone.
What's on the nameplate
ON/OFF toggle with contact position indicator — green band visible when contacts are open. Local signalling is mechanical, no auxiliary contacts built in. Earth-leakage protection requires a separate block (Vigi or iC60 add-on). Electrical durability is 10,000 cycles; mechanical durability 20,000 cycles — plenty for a distribution board that sees a few operations a year.