Interrupting capacity hits 242 kA at 240 V, 187 kA at 415/440 V, 121 kA at 500 V, and 3.7 kA at 690 V — the 690 V figure is low, so verify the available fault current at that voltage before specifying.
Rated insulation voltage 800 V, power loss 10 W maximum — budget that heat in the enclosure; the flat derating curve means no extra margin needed for elevated ambient up to 70 °C.
What the interrupting ratings mean for selection
At 690 V the 3.7 kA limit means this breaker is not a primary choice for 690 V systems unless the fault current is tightly controlled.