SCCR and selectivity — what the interrupting ratings mean for panel coordination
Its interrupting capacity is the headline figure for panel coordination: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 690 V. At 415 V, 154 kA SCCR means it can sit ahead of a group of smaller breakers without requiring a current-limiting fuse upstream, provided the available fault current at its terminals stays under that threshold.
Thermal derating — where the 80 A rating holds and where it drops
At 55 °C it derates to 76.8 A, then 75.2 A at 60 °C, 73.6 A at 65 °C, and 72 A at 70 °C.
The 1 aux + 1 trip alarm switch (HP type) provides remote status and fault indication without needing a separate auxiliary module.