What this 630 A MCCB delivers — and where the ratings matter
What sets this variant apart is the integrated shunt trip (STL) and communication function, making it suitable for remote-trip and monitored feeders where you need coordinated protection with a PLC or BMS. Breaking capacity is the headline: 187 kA at 240 V AC, 121 kA at 415/440 V, 75.6 kA at 500 V, and 9 kA at 690 V. At 690 V the 9 kA rating is still adequate for most motor control center applications, but confirm the available fault current if feeding a 690 V drive bank. The I²t let-through range is 945 A to 5,670 A, which governs how much energy passes during a fault — lower values for better downstream coordination on branch circuits.
Thermal derating — the real-world current you can carry
At 45 °C it drops 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; at 70 °C to 450 A. The max power loss is 162 W, which must be dissipated through the enclosure; factor that into your thermal budget.