Its interrupting capacity is 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V — per the datasheet, these are the maximum fault currents the breaker can safely clear at each voltage level. For a 480 V panel, the 52.5 kA at 440 V is the closest published figure; at 480 V the actual capability will be slightly lower, so verify coordination with the upstream fault current available. The rated current holds at 40 A from 40 °C through 50 °C ambient, then derates to 39 A at 55 °C and 60 °C, 38 A at 65 °C, and 37 A at 70 °C — that derating curve matters if the breaker sits in a warm enclosure near other heat sources.
It mounts on a DIN rail or directly to a panel backplate — the 3-pole width of 76.2 mm (3 inches) is standard for this frame size, so it fits existing SENTRON 3VA cutouts without modification.