Breaking capacity drops as voltage climbs: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 7.5 kA at 690 V. Continuous current holds at 400 A up to 50 °C, then derates to 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C. In a hot panel near a transformer or drive, use the 70 °C figure for sizing.
Auxiliary switch configuration and power loss
Maximum power loss is 96 W, which matters for enclosure heat rise calculations.
The 138 mm width is the critical panel cutout dimension — verify it clears adjacent breakers or busbar shrouds. Depth of 110 mm includes the arc-chamber volume; leave clearance for outgoing cable bends and the auxiliary switch wiring.