The Schneider Electric A9KS15163BQ is an Acti9 SW switch disconnector — a manually operated, toggle-controlled isolating device rated for 63 A at 240 V AC (50/60 Hz) in AC-22A utilisation category, meaning it handles mixed resistive and inductive loads including moderate motor switching without exceeding the rated making and breaking capacity. Built to IEC 60947-3, the standard for disconnect switches, it provides visible isolation for a single pole circuit and carries a rated impulse withstand voltage of 4 kV and a short-time withstand current of 756 A for 300 ms. The part ships as a set of 12 units, each occupying 18 mm (2 x 9 mm pitches) on a DIN rail — a compact footprint for multi-circuit panels.
The 63 A rating at 240 V AC is the operational current under AC-22A duty — the utilisation category for switching mixed loads. For purely resistive loads (AC-21A) the same current applies; for motor loads (AC-23A) the switch would be derated, so verify the load type against the AC-22A boundary. The tunnel-type terminals accept up to 35 mm² rigid or 25 mm² flexible conductors, with a tightening torque of 3.5 N·m and a strip length of 9 mm. Pollution degree 2 and tropicalisation class 2 indicate the device is rated for normal indoor environments with non-conductive pollution and occasional condensation — typical for a climate-controlled panel.
Each unit occupies 18 mm of rail width (2 modules at 9 mm pitch). The 68.5 mm depth and 81 mm height fit standard distribution board cutouts. Downstream compatibility with biconnect comb busbars simplifies daisy-chaining multiple switches in a row.