It delivers 75.6 kA breaking capacity at 240 V and 52.5 kA at 415 V, so it handles high-fault utility feeds without cascading upstream.
The 125 A rating holds flat from 40 °C to 50 °C, then derates to 120 A at 55 °C, 117.5 A at 60 °C, 115 A at 65 °C, and 112.5 A at 70 °C. For a panel running at 60 °C ambient, expect to budget 117.5 A continuous — not the full 125 A.
Breaking capacity by voltage
Breaking capacity steps down with system voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. At 415 V it covers most European industrial mains; at 690 V it still clears 10.5 kA, enough for low-fault 690 V sub-distribution.