The Schneider Electric A9N19805 is an Acti9 C120H miniature circuit breaker (MCB) with 2 poles, rated 63 A at 30 °C, D curve, and a 10 kA breaking capacity at 400 V AC per IEC 60898-1. The D curve means its magnetic trip threshold is 10–14× In, suited for loads with high inrush current like motors or transformers — the breaker holds through the start-up spike and trips only on sustained overload or short circuit.
Deployment Context
The clip-on mounting and 6-module width (9 mm pitches) fit standard DIN-rail enclosures. The 73 mm depth leaves clearance for shallow gland plates. Rated for isolation (suitability for isolation: yes) with a contact position indicator, so it doubles as a visible-break disconnect in distribution panels.