What this 630 A MCCB delivers
The Siemens SENTRON 3VA2463-6JP32-0JL0 is a 3-pole molded case circuit breaker rated for 630 A continuous current (Iu) at 40 °C, with an ETU550 electronic trip unit for line protection. Its breaking capacity hits 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 40 kA at 690 V — figures that give you headroom for high-fault utility feeds or transformer secondaries without cascading upstream.
Above that, derate linearly: 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. If your panel sits in a hot mezzanine or near a furnace line, use the 50 °C or 60 °C column for your continuous load calculation — don't spec it at 630 A and hope the ambient stays cool.
Auxiliaries and communication
The undervoltage release is not fitted. Communication function is present, so you can integrate status and trip data into a higher-level control system. The base switch is order code 3VA2463-6JP32-0AA0; the auxiliary trip module is 3VA9688-0BL32.
The 138 mm width for a 3-pole 630 A frame is standard for this class — verify your enclosure's gland-plate cutout and busbar spacing against those numbers before committing the panel layout.