What this 3VA2463-6HN32-0AB0 brings to the panel
The Siemens SENTRON 3VA2463-6HN32-0AB0 is a 3-pole molded case circuit breaker rated for 630 A continuous current at 40 °C, with an interrupting capacity of 242 kA at 240 V. That interrupting rating means it can safely clear a fault up to that level without the arc flashing over or the breaker failing — critical for high-fault-current panels near transformers or large motor banks. The ETU350 electronic trip unit gives you adjustable long-time, short-time, and instantaneous protection curves, so you can shape the trip response to the load instead of living with a fixed thermal-magnetic curve.
Physical fit and panel integration
The case measures 248 mm high, 138 mm wide, and 110 mm deep. That 110 mm depth is a key number for shallow enclosures or gland-plate clearance — it's shallower than many MCCBs in this current class, so it fits where a deeper breaker would hit the back wall. The front face carries IP40 protection, meaning it's sealed against tools and wires over 1 mm but not against water spray; keep it inside a rated enclosure.
Derating and ambient temperature
The 630 A rating holds only at 40 °C ambient. As the panel warms up, the breaker derates: 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. If your panel runs hot — say, a packed MCC lineup near a furnace line — you need to size up or accept the lower continuous current. The maximum operating temperature is 70 °C; storage range is -40 °C to 80 °C.
Auxiliary contacts and accessories
This variant comes with two auxiliary switches (high-performance type) built in — handy for status feedback to a PLC or for interlocking without adding a separate contact block. There is no undervoltage release, no shunt trip, no ground-fault monitoring, and no voltage trip on this order code. If you need those, you'd look at a different suffix. The power loss at full load is 162 W, so factor that into your enclosure thermal budget.