The Schneider Electric A9N2P16DGN is a 2-pole miniature circuit breaker from the Acti9 xC60 range, rated 16 A with a D tripping curve and a breaking capacity of 10 kA at 240 V AC and also at 415 V AC per IS/IEC 60898-1. Rated operational voltage covers 220–240 V AC and 380–415 V AC at 50/60 Hz, so it handles standard single-phase and three-phase distribution panels. The thermal-magnetic trip unit gives you both overload protection (thermal bimetal) and short-circuit protection (magnetic coil) in one package.
Clip-on mounting on a 35 mm DIN rail, 36 mm wide (2 module spaces at 9 mm pitch = 4 pitches). Depth is 77.5 mm, height 85 mm — standard for the Acti9 family, so it slots into existing distribution boards without re-spacing.
The 20,000 electrical and 20,000 mechanical cycles give a solid service life for normal switching duty. Earth-leakage protection requires a separate block (not integrated), so if you need RCD functionality, add a compatible Acti9 vigi module downstream. The toggle switch gives local ON/OFF indication — useful for troubleshooting without a meter.