What the ratings mean for fit
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. That 242 kA figure at 240 VAC tells you this breaker is sized for high-fault locations — main feeders, transformer secondaries, or large bus risers where the available fault current is substantial. 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. If the panel ambient runs above 40 °C, the real-world ampacity is lower than the nameplate — plan the load accordingly. The operating range spans -25 °C to 70 °C, so it handles outdoor enclosures in moderate climates without forced heating or cooling.
Panel integration and wiring
Dimensions: 248 mm high, 138 mm wide, 110 mm deep. The 138 mm width fits a standard 3-pole MCCB footprint on a DIN rail or bolted to a backplate — verify the mounting hole pattern against the existing panel layout before cutting the gland plate. The 110 mm depth leaves clearance for rear-connected bus bars or cable ladders. Auxiliary switch configuration: 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch (HQ type). 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.