Three poles, rated 80 A continuous at 40 °C, with an interrupting capacity of 75.6 kA at 240 V AC — that's the number that tells you it'll clear a serious fault without welding its contacts shut or blowing apart.
At 415 V it still holds 52.5 kA, at 440 V it's 32 kA, and at 500 V or 690 V it drops to 11.9 kA. The 80 A rating holds from 40 °C up to 50 °C; above that it derates to 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. If your panel runs hot, that's the number you size by, not the 80 A sticker. Power loss maxes at 21.7 W — that's the heat it dumps into the enclosure. For a multi-breaker panel, that adds up and drives ventilation or derating choices. The breaker includes an undervoltage release and two HQ auxiliary switches, so it's ready for remote status and shunt-trip control without add-on modules.