What the ratings mean for fit
The Siemens 3VA2463-6KP32-0HC0 is a SENTRON molded case circuit breaker (MCCB) rated for continuous current of 630 A at 40 °C, with a thermal derating curve that drops to 450 A at 70 °C ambient — so if this breaker lands in a hot panel or next to other heat sources, the actual ampacity is the derated figure, not the nameplate 630 A. Short-circuit breaking capacity is voltage-dependent: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V. That 9 kA at 690 V is the binding constraint for a 690 V bus — verify the available fault current at the point of installation doesn't exceed that figure. The adjustable trip block covers 945 A to 5,670 A (1.5x to 9x the 630 A rating), which gives selectivity headroom for downstream feeders and motor circuits. No undervoltage release is fitted; the auxiliary release is a shunt trip (STL), and the auxiliary switch is a 2-switch HQ type.
Panel integration and mounting
Footprint is 138 mm wide by 248 mm tall by 110 mm deep — a 3-pole frame that fits a standard MCCB cutout. No DIN-rail mount; this is a bolted-frame breaker for fixed or plug-in base mounting inside a distribution panel or switchboard. Maximum power loss is 162 W at rated current — that's heat that must be ventilated or factored into the enclosure's thermal budget. At full 630 A load, expect the panel internal temperature rise to include this dissipation.