Interrupting capacity is the headline here: 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V. That puts this breaker in the high-fault tier — suitable for main or feeder positions where available fault current exceeds what a standard MCCB can clear.
Integration notes — panel fit and wiring
The 86 mm depth matters when you're laying out a shallow backpanel or a gland-plate clearance. At 140 mm wide, it occupies three standard 45 mm module positions on a DIN rail — verify your rail length if you're swapping into an existing assembly. The 40 A rating is continuous at any temperature in that operating range, so no summer derating worry.