Breaking capacity is 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V — numbers that govern selectivity and SCCR in the panel schedule.
Full 80 A rating holds through 50 °C ambient. At 55 °C it derates to 78 A, at 65 °C to 75 A, and at 70 °C to 74 A — useful for a sealed or high-ambient enclosure where the breaker shares heat with other devices.
