The Schneider Electric A9N3P16DGN is an Acti9 xC60 miniature circuit breaker with a 16 A rated current, three protected poles, and a D tripping curve (magnetic threshold 10–14 x In). The breaking capacity is 10 kA Icn at both 240 V and 415 V AC, 50/60 Hz, certified to IS/IEC 60898-1. That 10 kA rating at 415 V is what governs coordination in a distribution board — it determines whether the MCB clears a bolted fault upstream of the load without the main breaker tripping.
Mounts via clip-on onto 35 mm DIN rail. The 3-pole body occupies 6 x 9 mm pitches (54 mm wide). The IP20 finger-safe front is standard for enclosed distribution boards.