The Siemens 3VA2463-0HL32-0AA0 is a 3-pole SENTRON molded case circuit breaker rated for 630 A continuous current at 40 °C, with an adjustable overcurrent release (ETU320) that trips between 945 A and 5,670 A. Breaking capacity is 440 kA at 415 V AC and 187 kA at 690 V AC, which means it safely interrupts fault currents up to those levels without cascading upstream — critical for high-fault panels where the available short-circuit current is above 100 kA.
Thermal derating — the real-world current you can carry
At 45 °C it carries 612 A; at 50 °C, 593 A; at 55 °C, 575 A; at 60 °C, 557 A; at 65 °C, 538 A; and at 70 °C, 520 A. The ETU320 release compensates thermally, but the frame's heat dissipation (162 W max at rated load) needs ventilation or forced airflow in a sealed cabinet.
The 3-pole footprint matches standard SENTRON 3VA2 cutouts; verify the depth (110 mm) against your gland plate clearance before committing the BOM.