What this MCCB does on the line
Its breaking capacity reaches 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V — so it clears high fault currents across common low-voltage network levels without needing an upstream current-limiting fuse.
Rated current derates with ambient temperature: 630 A at 40 °C, 612 A at 45 °C, 593 A at 50 °C, 575 A at 55 °C, 557 A at 60 °C, 538 A at 65 °C, and 520 A at 70 °C — the full load rating only holds below 40 °C ambient.
