The interrupting capacity hits 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3.7 kA at 690 V — that last figure drops sharply because the arc energy at 690 V is harder to extinguish, so this breaker is sized for 400 V-class distribution, not 690 V motor circuits.
Thermal performance and panel fit
That 86 mm depth is compact for a 4-pole MCCB at this interrupting level; it leaves clearance behind a standard 200 mm deep gland plate.
