Its headline breaking capacity reaches 242 kA at 240 V AC, dropping to 187 kA at 415 V and 440 V, then 121 kA at 500 V, and 9 kA at 690 V — meaning it can safely interrupt fault currents up to those levels without cascading upstream, which is the key selectivity figure for a main or feeder breaker in a high-fault installation. The adjustable thermal-magnetic trip unit covers a range from 945 A minimum to 5 670 A maximum, giving the specifying engineer room to coordinate with downstream breakers.
Thermal derating — the real-world current you can actually use
The 630 A rating holds only at 40 °C ambient. At 45 °C it derates to 600 A, at 50 °C to 570 A, at 55 °C to 540 A, at 60 °C to 510 A, at 65 °C to 480 A, and at 70 °C to 450 A.
Integration and footprint
The 110 mm depth keeps the breaker clear of the gland plate in a 600 mm deep enclosure.