The Siemens SENTRON 3VA2463-6HL32-0BH0 is a 3-pole molded case circuit breaker rated for 630 A continuous current at 40 °C, with a line protection profile (ETU320 trip unit). Breaking capacity hits 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 40 kA at 690 V — so it's sized for high-fault distribution panels where the upstream transformer can dump serious energy. No ground-fault monitoring, no phase-failure detection, no communication module — this is a straight feeder breaker, not a smart device.
At 45 °C it's 612 A; at 50 °C, 593 A; at 55 °C, 575 A; at 60 °C, 557 A; at 65 °C, 538 A; at 70 °C, 520 A. The maximum power loss is 164.5 W, which matters for enclosure heat rise calculations.
Panel fit — dimensions and mounting
The 110 mm depth means it clears most standard enclosure gland plates. The auxiliary switch block (2 aux + 1 trip alarm) is factory-fitted; no field assembly needed for that.
What's inside the trip unit
The ETU320 is an electronic trip unit with LSI protection curves (long-time, short-time, instantaneous). No voltage trigger, no communication function, no phase-failure detection — it's a basic adjustable electronic trip for feeder protection. Latching endurance is 15,000 operations.