63 A MCCB with a flat thermal curve and a 330 kA interruption at 240 V
The Siemens 3VA2163-7KQ46-0AA0 is a 4-pole SENTRON molded case circuit breaker rated for 63 A continuous current, and it holds that 63 A rating flat from 40 °C all the way up to 70 °C — no derating to calculate when the panel runs hot. The interrupting capacity at 240 V is 330 kA, which drops to 242 kA at 415 V and 440 V, then to 187 kA at 500 V, and finally to 3.7 kA at 690 V.
The communication function (listed as present on this variant) means it can talk to a higher-level system for power monitoring and remote trip indication, which saves a maintenance electrician from having to walk the whole line to find what opened. The ground-fault monitoring uses summation current formation on L + N, so it catches leakage on the neutral as well as the phases. Power loss is 4 W maximum, which is low enough that you don't need to factor heat into the enclosure sizing for a single breaker.
Deployment context
This breaker is a panel-mounted device — it bolts into a switchboard or a distribution panel, not onto a DIN rail.