That 63 A holds flat through 50 °C; it derates to 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C — so in a warm panel you lose less than 10 % of headroom even near the top of the operating range. It's a straight line-protection breaker — no ground-fault monitoring, no auxiliary measurement functions. Breaking capacity is where this breaker earns its panel space: 121 kA at 240 VAC, 75.6 kA at 415 V, 52.5 kA at 440 V, and still 11.9 kA at 500 V and 690 V. That's high-interrupting capability for a 63 A frame — it handles fault currents that would weld a standard MCCB's contacts shut.
Dimensions are 70 mm deep, 76.2 mm wide, 130 mm tall — a compact 3-pole footprint that fits standard DIN-rail or screw-mount panel layouts. The 17.3 W maximum power loss means you don't need forced ventilation for a single unit, but cluster several in a sealed enclosure and that heat adds up. No communication function, so no bus wiring to pull — just power in, load out, and the TM220 release does the rest.