The Siemens SENTRON 3VA2463-5HL32-0AL0 is a 3-pole molded case circuit breaker rated for a continuous current of 630 A at 40 °C, with the ETU320 electronic trip unit providing adjustable long-time delay (tr) from 0.5 s to 12 s and an adjustable Ir up to 630 A. The thermal derating curve is published: 630 A at 40 °C, 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.
The 138 mm width (5.4 in) is the standard 3-pole MCCB footprint for this class — it occupies three 45 mm pole spaces on a DIN rail or panel-mount base. The 110 mm depth includes the rear arc chamber and front rotary handle; verify clearance behind the panel for the arc exhaust and cable bending radius.