The Schneider Electric A9KF71163BQ is a 1-pole (1P) miniature circuit breaker from the Acti9 K60 series, rated at 63 A with a C-trip curve. It's built to EN/IEC 60898-1 and uses a thermal-magnetic trip unit. It occupies 2 x 9 mm pitches (18 mm width) on a DIN rail, so it takes up one standard modular slot in a consumer unit or panelboard.
The IP20 finger-safe terminals are fine for dry indoor panels. Operating altitude up to 2000 m, 95% relative humidity at 55 °C, and tropicalisation class 2 per IEC 60068-1 — it handles warm, humid environments like boiler rooms or tropical climates without derating.