The Siemens SENTRON 3VA2463-6JP32-0CL0 is a 3-pole molded case circuit breaker rated for 630 A continuous current at 40 °C, with a breaking capacity of 242 kA at 240 V and 187 kA at 415 V. The 630 A frame means it handles the full load of a large motor control center or a secondary distribution subpanel without needing a parallel breaker arrangement. The continuous current derates as ambient temperature rises: 630 A at 40 °C, down to 450 A at 70 °C.
The 110 mm depth leaves clearance for rear-connected bus bars or cable ladders. The undervoltage release is wired separately from the main power path — it drops the breaker if control voltage falls below the dropout threshold, which is useful for safety circuits or emergency-stop chains that need a hard shunt trip without a separate shunt trip module. Maximum power loss is 164.5 W at full rated current. That heat has to leave the enclosure — factor it into the panel thermal budget, especially if the breaker is in a sealed stainless steel box with no forced ventilation.