What this 630 A MCCB does on the line
The Siemens SENTRON 3VA2463-6JP32-0JH0 is a 3-pole molded case circuit breaker rated for 630 A continuous current at 40 °C, designed for line protection in industrial distribution panels. Its 242 kA breaking capacity at 240 V means it can safely interrupt fault currents up to that level without upstream devices needing to coordinate — a key spec for high-fault service entrances or transformer secondaries. The 187 kA rating at 415 V and 440 V covers the common low-voltage motor control center bus ranges across Europe and Asia. Thermal derating is published across the full operating range: 630 A at 40 °C drops to 450 A at 70 °C. If this breaker lives in a non-air-conditioned enclosure near a furnace or solar combiner, that 70 °C figure governs the real load it can carry — not the 40 °C nameplate. The auxiliary switch configuration includes two auxiliary switches plus one trip alarm switch (HQ), and a shunt trip release (STL) is built in. That means remote tripping and status feedback are wired from the factory — no field retrofit of the shunt trip coil.
Panel fit and mounting
The 3VA2463-6JP32-0JH0 measures 248 mm high by 138 mm wide by 110 mm deep. It mounts on a DIN rail or directly to a backplate via the molded case's screw-down lugs. At 138 mm wide, it occupies three 45 mm pole spaces on a standard DIN rail — typical for a 3-pole MCCB in this class.
Breaking capacity at system voltages
Breaking capacity is voltage-dependent and published per IEC/UL: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V. The 690 V figure is notably lower — if the breaker is used on a 690 V IT system or a wind turbine collector, the available fault current must be verified against that 9 kA limit.