The interrupting ratings are the headline: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3 kA at 690 V. Ground-fault monitoring is built in via summation current formation on the L + N conductors, which means it can detect leakage without needing an external GFCI module — useful on distribution panels feeding sensitive loads or wet-area circuits.
That 140 mm width for a 4-pole MCCB is standard for the SENTRON 3VA frame — it occupies the same footprint as other 63 A 4-pole units in the series, so a panel laid out for a 3VA2063-8JQ42-0AA0 will accept this breaker without re-drilling the mounting plate or re-routing the bus bars.