At 415 V it still breaks 121 kA, at 440 V it's 75.6 kA, and at 500 V or 690 V it holds at 17 kA. That means on a 480 V panel you've got 75.6 kA of interrupting capacity — enough to coordinate with most downstream breakers without cascading.
Thermal derating and power loss
At 55 °C it drops to 39 A, at 65 °C to 38 A, and at 70 °C to 37 A. Maximum power loss is 10.8 W, so heat buildup inside a compact panel is manageable. The IP40 front protection means it's fine for clean indoor switchgear but not washdown areas.
Physical fit and mounting
That 4-inch width is standard for a 4-pole MCCB in the SENTRON 3VA platform — it fits the same mounting footprint as other 3VA frame sizes.