It carries a rated insulation voltage of 800 V and delivers a breaking capacity of 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V — so the interrupting rating drops sharply above 500 V, which is the figure to check if your fault current is on a 690 V bus.
The 3-pole design with three auxiliary switches (HQ type) gives you one spare signaling contact beyond the standard alarm and trip-indicator pair, useful for remote status on a PLC input.
