The Siemens 3VA2463-6JP32-0DH0 is a SENTRON molded case circuit breaker (MCCB) rated for 630 A continuous current at 40 °C, with a 3-pole configuration and an interrupting capacity of 242 kA at 240 V.
Above that, the thermal derating curve applies: 600 A at 45 °C, 570 A at 50 °C, down to 450 A at 70 °C. Interrupting capacity is 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V. At typical 400 V-class industrial voltages, the 187 kA figure gives substantial fault-current headroom for most distribution panels. Adjustable current pickup range: 945 A minimum to 5,670 A maximum.
Physical Integration and Panel Fit
Maximum power loss is 164.5 W — account for this heat dissipation in the enclosure thermal calculation, especially if the breaker is enclosed with other heat-generating devices.