630 A MCCB with ETU860 — what the ratings decide
The Siemens SENTRON 3VA2463-0KQ32-0AA0 is a 3-pole molded case circuit breaker rated for 630 A continuous current at 40 °C, with an electronic trip unit ETU860 that handles adjustable N-conductor protection from OFF to 160 % of the phase setting.
The 630 A rating holds only at 40 °C ambient. Above that, the continuous current must be derated: 600 A at 45 °C, 570 A at 50 °C, 540 A at 55 °C, 510 A at 60 °C, 480 A at 65 °C, and 450 A at 70 °C. The maximum power loss is 162 W, so the enclosure ventilation needs to handle that dissipation at the chosen derated current.
Panel integration — footprint and protection class
That depth (110 mm) is the dimension from the mounting surface to the front cover — critical for enclosure depth planning, especially if the panel has a shallow gland plate or a rear-mounted busbar system.
Ground-fault and communication — what the ETU860 adds
Communication function is present (yes), which means this breaker can report status and trip events over a bus system, though the exact protocol is not listed in this spec set. The undervoltage release is not fitted on this variant; if undervoltage protection is required, a different order code or an add-on module is needed.