It carries a 25 kA interrupting capacity at 230 V AC (both Icu and Ics), built to BS EN 60947-2 for isolation suitability.
That is a high-capacity short-circuit rating for a single-pole distribution breaker, suited for high-fault-capacity panels. The 8 kV impulse withstand (Uimp) confirms it handles transient overvoltages common in industrial mains.
Panel-mounted via backplate, with horizontal or vertical orientation allowed. It occupies a single 35 mm module width. The toggle control is manual; no auxiliary contacts or earth-leakage module are integrated. Rated insulation voltage is 750 V, giving headroom for the 230 V circuit.