The Siemens SENTRON 3VA2463-6JP32-0JC0 is a 3-pole molded case circuit breaker rated for 630 A continuous at 40 °C, with an interrupting capacity of 242 kA at 240 V and 187 kA at 415 V. The adjustable thermal-magnetic trip range (945 A minimum, 5 670 A maximum) lets you coordinate downstream breakers without swapping the frame.
Derating and thermal budget — what the 40 °C rating really means
The 630 A rating is valid at 40 °C ambient. Above that, the breaker derates 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. The maximum power loss of 162 W (at rated current) drives the heat load inside the enclosure; factor that into the panel's ventilation or cooling calcs.
The 110 mm depth (4.33 in) leaves clearance for rear-connected bus bars or a cable duct behind the breaker.