The 80 A rating holds flat from 40 °C up to 50 °C, then derates to 74 A at 70 °C.
This breaker can safely clear a fault at 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at 500 V and 690 V. The 240 V figure is the highest — so if your service entrance or main panel feeds from a 240 V transformer, you have a lot of headroom for high-fault scenarios.
Fit and footprint
The IP40 front face keeps dust and incidental contact out, but it's not washdown-rated; keep it inside the cabinet.
