Interrupting capacity — the real number for fault coordination
At 240 V it is rated for 330 kA; at 415 V and 440 V it holds at 242 kA; at 500 V it drops to 187 kA; and at 690 V it is 3.7 kA. For a 40 A frame, those are high-interrupt ratings — the kind you need when the transformer is close and the available fault current is stiff. The 690 V figure tells you this is not a 690 V primary breaker; it is a 400–480 V secondary breaker with a very high ceiling at the lower voltages.
The 105 mm width across three poles means it occupies roughly four 27 mm module spaces on a DIN rail, though the SENTRON 3VA series also accepts screw-mounting for bolted busbar connections.
Ground-fault monitoring and auxiliary functions
The trip indicator is also absent, so fault indication is via the handle position only. Power loss is a modest 1.6 W maximum, which matters when you are stacking multiple breakers in a sealed enclosure and counting the thermal budget.