The Siemens SENTRON 3VA2463-5HN32-0CA0 is a 3-pole molded case circuit breaker rated for 630 A continuous current (Iu) at 40 °C, with an ETU350 electronic trip unit and an integrated undervoltage release (UVR). Breaking capacity runs 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V — figures that tell you this breaker is sized for high-fault utility feeds or large transformer secondaries where the available short-circuit current is substantial.
Thermal derating — the real-world current you can actually run
Above that, the breaker derates in 10 °C steps: 612 A at 45 °C, 593 A at 50 °C, 575 A at 55 °C, 557 A at 60 °C, 538 A at 65 °C, and 520 A at 70 °C. If your panel ambient runs 50 °C — common in a packed switchroom — you lose about 6 % of the nominal rating. Plan the load bus accordingly; the breaker won't trip on thermal overload at 593 A, but it also won't carry the full 630 A without nuisance tripping.
What it does not carry — and why that matters for spec review
The trip indicator is also absent, so there is no local mechanical flag showing the breaker tripped on fault versus manual off — something to note if your maintenance team relies on visual trip indication at the panel.