Breaking capacity hits 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 3.4 kA at 690 V — numbers that tell you this breaker handles high-fault utility feeds and transformer secondaries without cascading upstream. The 63 A rating holds flat from 40 °C through 50 °C, then derates to 53.55 A at 70 °C ambient. Communication function is present, so this breaker can report status and trip events over a bus — useful for a plant-wide power monitoring scheme.
The integrated auxiliary trip (3VA9608-0BB25) and the supplied basic switch (3VA2063-5KP32-0AA0) are specific to this variant; if you're holding spares for a panel built around this order code, those sub-components are what you'd order alongside it.
The 7.9 W maximum power loss means ventilation is minimal; no forced cooling needed in a typical IP54 cabinet.