Breaking capacity — what it handles at your bus voltage
This MCCB's interrupting rating varies with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 4.5 kA at 690 V. For a 480 V plant distribution panel, the 121 kA at 440 V figure is the closest published value — that's well above typical available fault current in most industrial MCC rooms, so selectivity with downstream breakers is achievable without worrying about the main tripping on a feeder fault.
Thermal performance — rated for the heat, not the office
At 55 °C it derates to 238 A, at 60 °C to 225 A, at 65 °C to 213 A, and at 70 °C to 200 A.
The 105 mm width per 3-pole unit is the standard SENTRON 3VA footprint, so it drops into existing busbar and mounting arrangements without re-drilling.
Maximum power loss is 50.5 W at rated current. Plan for forced ventilation or a larger enclosure if you're grouping several of these in a confined space.