630 A MCCB with high interrupting capacity
The Siemens SENTRON 3VA2463-5JP32-0KC0 is a 3-pole molded case circuit breaker rated for 630 A continuous current at 40 °C ambient. That 630 A rating is the backbone of the part — it's sized for main feeder or large motor protection in industrial switchgear. The interrupting capacity hits 187 kA at 240 V AC and 121 kA at 415 V, which means it can safely clear a fault up to those levels without the arc re-striking or the case rupturing. For a 630 A frame, those are high-end numbers — you're looking at strong fault current handling for heavy industrial service. This breaker is designed for line protection, not motor or generator protection. It carries a shunt trip release (STL) and two auxiliary switches (HQ) built in, plus a communication function for remote monitoring or integration into a plant control system. The basic switch module is order code 3VA2463-5JP32-0AA0 — that's the core trip unit this variant ships with.
Thermal derating and panel fit
The 630 A rating holds at 40 °C. Above that, the breaker derates linearly: 600 A at 45 °C, 570 A at 50 °C, 540 A at 55 °C, 510 A at 60 °C, 480 A at 65 °C, and 450 A at 70 °C. If your panel ambient runs hot — say near a furnace line or in a non-conditioned enclosure — size the load side for the derated figure, not the nameplate 630 A. The maximum operating temperature is 70 °C; storage range is -40 to 80 °C. Mounting dimensions: 248 mm high, 138 mm wide, 110 mm deep. That's a standard 3-pole MCCB footprint for this class — it drops into most SENTRON mounting plates or DIN-rail adapters without panel rework. Power loss at full load is 162 W, so factor that into enclosure ventilation calcs.