What this 630 A MCCB brings to a distribution panel
Three-pole, line-protection design (no ground-fault monitoring, no undervoltage release, no communication module).
Standard screw-mount to a backplate; no DIN-rail adapter on this frame size. Verify cutout and bus-bar spacing against the existing panel layout before ordering.
Thermal derating and trip unit
Rated 630 A at 40 °C ambient, but the frame derates linearly: 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 ETU350 trip unit supports adjustable Ir (long-time pickup) from 0.4x to 1.0x In, plus short-time and instantaneous bands — enough flexibility for feeder or main breaker duty.
