The Schneider Electric A9N2P63DGN is an Acti9 xC60 miniature circuit breaker (MCB) rated for 63 A continuous current, with a D tripping curve that triggers magnetic trip between 10 and 14 times the rated current. The 2-pole configuration protects both phase conductors in a single-phase or split-phase distribution circuit. Breaking capacity is 10 kA Icn at both 240 V and 415 V AC, 50/60 Hz, certified to IS/IEC 60898-1. The thermal-magnetic trip unit combines a bimetal for overload protection and a solenoid for short-circuit — standard MCB architecture, but the D curve's wider magnetic band is what makes this part distinct from the more common C-curve sibling.
Clip-on mounting to a 35 mm DIN rail, 4 module pitches wide (36 mm per pole, so 72 mm total width for the 2P unit). Depth is 77.5 mm, height 85 mm — standard for the Acti9 xC60 family, so it fits existing rail layouts without re-spacing. That matters for panels in coastal plants or unairconditioned enclosures.