The Siemens SENTRON 3VA2463-8HM32-0AA0 is a 3-pole molded case circuit breaker rated 630 A at 40 °C, fitted with an ETU330 electronic trip unit. It carries a 440 kA interrupting rating at 240 V and 330 kA at 415 V, with the rating dropping to 52.5 kA at 690 V. That kind of fault-clearing capacity means it's sized for high-fault service-entrance or distribution positions where the available short-circuit current is substantial — not a branch feeder.
Ratings and what they mean for fit
The 630 A continuous rating is at 40 °C ambient; it derates to 520 A at 70 °C. If the panel ambient runs hot — say, crowded with drives or transformers — the effective current capacity drops. The ETU330 trip unit handles LSIG (long-time, short-time, instantaneous, ground-fault) curves, and the ground-fault monitoring is summation-current on the line conductors. That matters for a solidly-grounded system where you want a single device to cover phase and ground protection without an external relay.
Mounting and integration
The 3VA2463-8HM32-0AA0 measures 138 mm wide, 248 mm high, and 110 mm deep. That's a standard SENTRON 3VA frame footprint — it bolts into a panel on a mounting plate, not a DIN rail. The IP40 front face means it's protected against solid objects >1 mm but not sealed against moisture; keep it inside a dry enclosure. Power loss at rated load is 162 W, so factor that into the enclosure's thermal budget — especially if it's grouped with other high-current devices.