It's a 3-pole unit rated 63 A continuously at 40 °C, and it holds that rating all the way up to 50 °C before it starts to taper: 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. That's a solid thermal curve for a warm panel — you don't lose headroom until you're past 55 °C.
Breaking capacity — the number that decides whether it clears a fault or welds shut
This MCCB carries a breaking capacity of 75.6 kA at 240 V AC, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at both 500 V and 690 V. At 690 V the 7.5 kA figure is lower, but that's still enough for most industrial feeders at that voltage level.
What's inside the can — auxiliary switches and releases
If your panel needs a UVR or GFCI function, you're looking at a different suffix. The shunt trip lets a safety PLC or E-stop circuit kill the breaker remotely — that's the usual integration point.
Depth of 70 mm means it clears most enclosure back-panels without a gland-plate conflict. Mounting is screw-clamp or bus-bar, not DIN rail.