Breaking capacity steps are given per voltage: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, 17 kA at 500 V, and 11.9 kA at 690 V. That covers most industrial distribution voltages up to 690 V, with the highest fault-interrupting ability at the lower voltages — typical for a line-protection MCCB sized for high-fault panels.
Temperature derating and thermal management
Above that it derates linearly: 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C.
Rated insulation voltage is 800 V, and the operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C.