What this MCCB is and what the ratings mean
The Siemens SENTRON 3VA2463-5KP32-0CA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 630 A at 40 °C. That 630 A figure is the thermal baseline — the breaker is designed to carry that load continuously without tripping, making it a fit for main feeders or large sub-feeders in industrial distribution. The interrupting ratings climb to 187 kA at 240 V and 121 kA at 415 V and 440 V, then drop to 75.6 kA at 500 V and 9 kA at 690 V. Those numbers tell you the maximum fault current the breaker can safely clear at each voltage level — critical for selectivity studies. If your available fault current at the panel exceeds 9 kA at 690 V, this breaker won't hold; at 240 V, it handles nearly twenty times that. The thermal derating curve is published: 630 A at 40 °C, stepping down to 450 A at 70 °C. That means if your enclosure runs hot, you lose nearly a third of the ampacity — plan the ventilation or upsize the frame.
Integration and panel fit
Dimensions are 248 mm high, 138 mm wide, 110 mm deep. That 110 mm depth is the body only — factor in the handle throw and rear terminal clearance when laying out the enclosure. The breaker includes an undervoltage release (UVR) and a communication function, so it can be wired into a safety circuit that drops the main on power loss and report status back to a PLC or BMS. No auxiliary switch or ground-fault monitoring module is fitted as-delivered; those are add-on options if the application requires them. The basic switch variant is 3VA2463-5KP32-0AA0 — same frame, no UVR or comms.