Breaking capacity across voltages — the so-what
This breaker delivers 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V.
Thermal derating — real-world current capability
Rated 80 A from 40 °C through 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. In a crowded panel where ambient hits 55 °C, you lose 2 A — still within most motor-circuit sizing margins.
Integrated auxiliaries and release
The auxiliary switches report breaker position back to a PLC or status lamp without extra wiring.
Lifecycle and compliance posture
No PCN or EOL notice on record.