What this MCCB delivers on the line
The Siemens SENTRON 3VA2463-5JP32-0KH0 is a 3-pole molded case circuit breaker rated for 630 A continuous at 40 °C, with a breaking capacity of 187 kA at 240 V — enough headroom to handle high-fault utility feeds or transformer secondaries without cascading upstream. At 415 V it still delivers 121 kA, dropping to 9 kA at 690 V; that 690 V figure tells you this is a 600 V class breaker being pushed to its ceiling — spec it at the voltage you actually run, not the nameplate maximum. Thermal derating is baked in: 630 A at 40 °C, 570 A at 50 °C, 510 A at 60 °C, 450 A at 70 °C. If your panel ambient runs hot, size the breaker off the 60 °C or 70 °C column, not the 40 °C sticker.
Lifecycle and sourcing posture
The 3VA2463-5JP32-0KH0 carries a shunt trip (STL) and two auxiliary switches plus a trip alarm switch HQ — field-configurable, not a sealed assembly. If a line-down situation hits, the aux switch pack can be swapped on site without pulling the breaker from the panel.
Physical fit and panel integration
Dimensions: 248 mm high, 138 mm wide, 110 mm deep. That 110 mm depth is the key number for enclosure depth — it fits standard 200 mm deep wall-mount enclosures with room for wiring gutters behind it. Rated for operation from -25 °C to 70 °C ambient, storage from -40 °C to 80 °C. The storage range exceeds the operating range — that's handling and shipping limits, not running conditions. Max power loss is 162 W at full rated current. That's not trivial — factor it into your enclosure thermal calculation, especially if the MCCB shares a compartment with other heat sources.
Selectivity and coordination note
Line protection design with a trip indicator and voltage trigger — the trip indicator gives a visual flag on the breaker face, useful for a quick walk-down after a fault without opening the panel door. The adjustable trip range runs from 945 A minimum to 5,670 A maximum — that's the short-time and instantaneous pickup adjustment band. For selective coordination with downstream breakers, set the pickup above the let-through of the largest downstream device.