Breaking capacity is the headline: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V. That 220 kA at 240 V puts this in the high-fault category — suitable for transformer secondaries or large bus risers where prospective fault current exceeds 100 kA. Thermal derating is tight: full 63 A from 40 °C through 50 °C, then 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, 58 A at 70 °C. That means in a 50 °C panel ambient you get the full nameplate; above that you lose roughly 1 A per 5 °C rise. Four-pole width at 101.6 mm (4 inches) is standard for this frame size — it occupies one 4-inch module on the DIN rail or panel-mount footprint. IP40 on the front means tools and fingers stay out; the rest of the breaker is open to the enclosure air for cooling.
The 70 mm depth (2.76 in) leaves clearance behind a standard enclosure door. The TM220 release is fixed — no interchangeable trip units, no voltage-trigger accessory.