That 80 A holds steady from 40 °C up to 50 °C ambient — no derating needed in a warm panel — then drops to 78 A at 55 °C and 74 A at 70 °C. The breaking capacity tells you where it can safely interrupt a fault: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 500 V or 690 V.
Four poles mean it switches all phases plus neutral in a single unit, saving rail space over a 3-pole breaker plus separate neutral block.
