Its 75.6 kA breaking capacity at 240 V drops to 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at both 500 V and 690 V — so the available fault current at the installation point determines which voltage tap you can use it on.
Integrated auxiliaries and release
The trip indicator gives a visual flag on the breaker face, useful during panel walk-downs.
The breaker holds its full 80 A rating from 40 °C up to 50 °C, then derates to 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C (–). That means in a 55 °C panel ambient — common near top-of-enclosure heat rise — you lose only 2 A, so the 80 A frame still covers most 75 A continuous loads without upsizing.