What the ratings mean for fit
The Siemens 3VA2463-5KP32-0CH0 is a SENTRON molded case circuit breaker (MCCB) rated for 630 A continuous at 40 °C, with a 3-pole construction for three-phase line protection. That 630 A figure is the maximum uninterrupted current it can carry in a 40 °C ambient — above that, you follow the derating curve: 600 A at 45 °C, 570 A at 50 °C, stepping down to 450 A at 70 °C. For a panel near a tire-curing press where ambient can push 50–55 °C, the effective rating drops to 540–570 A, so size the upstream transformer and bus accordingly. Breaking capacity tells you the maximum fault current this MCCB can safely interrupt at a given voltage. At 240 V it handles 187 kA; at 415 V and 440 V it handles 121 kA; at 500 V it handles 75.6 kA; at 690 V it handles 9 kA. For a 480 V industrial panel (common in North America), the relevant figure is the 121 kA at 440 V — that gives headroom for high-fault installations like a main service entrance. The 9 kA at 690 V is the ceiling for 690 V drives or transformer secondaries. This breaker includes a communication function and an undervoltage release (UVR), plus two auxiliary switches and one trip alarm switch (HQ configuration). The UVR trips the breaker when control voltage drops below a threshold — useful for safety circuits where loss of control power must open the main feeder. The communication function allows remote monitoring or trip indication over a fieldbus, though the protocol is not specified in the base listing; verify compatibility with your PLC or BMS gateway.
Lifecycle and sourcing reality
Maximum power loss is 164.5 W at full rated current. That heat must be dissipated inside the enclosure; for a panel with multiple breakers, factor this into the thermal budget to avoid cascading derating. The storage temperature range is -40 °C to 80 °C, and operating range is -25 °C to 70 °C — the storage limit governs handling and warehousing, not running conditions.
Panel integration and dimensions
The 3VA2463-5KP32-0CH0 measures 248 mm high, 138 mm wide, and 110 mm deep. The 138 mm width is standard for a 3-pole MCCB in this class — it fits the same DIN-rail or bolt-on footprint as other SENTRON 3VA2 frames. The 110 mm depth is shallow enough for most 300 mm deep enclosures, but verify gland-plate clearance if the panel has rear-mounted bus bars or cable ducts.