What the ratings mean for your panel
The Siemens 3VA2463-5KP32-0CC0 is a SENTRON molded case circuit breaker rated for 630 A continuous current at 40 °C, with a breaking capacity of 187 kA at 240 V — that's the fault it can safely interrupt without welding contacts or venting arc gas into the enclosure. At 415 V it still handles 121 kA, and at 690 V it's 17 kA. The ETU850 electronic trip unit gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves, plus a communication function for remote monitoring over PROFIBUS or PROFINET. The 164.5 W max power loss at full load means you need to account for heat rise in a packed panel — don't crowd it next to drives or power supplies without leaving air gap or forced ventilation. It ships with an undervoltage release (UVR) and two HQ auxiliary switches as standard — the UVR drops the breaker if control voltage falls below the dropout threshold, so you don't need a separate undervoltage relay. The auxiliary contacts report breaker position back to a PLC or status lamp without extra wiring. No trip indicator on the front, so if you need visual trip indication at the breaker, plan for an auxiliary contact wired to a panel light.
Derating and thermal reality
The 630 A rating is at 40 °C ambient. At 45 °C it's 600 A, at 50 °C it's 570 A, at 55 °C it's 540 A, at 60 °C it's 510 A, at 65 °C it's 480 A, and at 70 °C it's 450 A. If your panel ambient hits 50 °C — say it's near a furnace line or under a non-climate-controlled roof — the breaker derates to 570 A. Size your load accordingly or spec a higher frame. The operating range is -25 °C to 70 °C, storage from -40 °C to 80 °C. The 248 mm height, 138 mm width, 110 mm depth footprint fits standard SENTRON 3VA mounting plates; measure your existing cutout before ordering.