What this 630 A MCCB delivers
The Siemens 3VA2463-5HL32-0AC0 is a SENTRON 3-pole molded case circuit breaker rated for 630 A continuous current at 40 °C, with a maximum breaking capacity of 121 kA at 415 V AC. It ships without undervoltage release, without ground-fault monitoring, and without communication function — a straightforward thermal-magnetic or electronic trip unit for distribution duty.
Breaking capacity varies with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 9 kA at 690 V. The 690 V figure is low enough that you need to verify coordination if that's your line voltage — this breaker is really at home on 400–480 V systems where it delivers its full interrupting rating.
It derates linearly as the panel temperature rises: 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. Maximum power loss is 162 W, which matters for ventilation planning in sealed enclosures.