The Siemens 3VA2463-7HN32-0AJ0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated for line protection. It carries a continuous current Iu of 630 A at 40 °C, with the ETU350 electronic trip unit managing the overcurrent release. The 330 kA breaking capacity at 240 V tells you this breaker can interrupt a massive fault without upstream cascading — that's the figure that governs your SCCR coordination study.
Breaking capacity across the voltage range
At 415 V and 440 V it still holds 242 kA; at 500 V it's 187 kA; at 690 V it drops to 52.5 kA. These are the numbers your selectivity study needs — the breaker stays coordinated downstream across the full voltage band, not just at one test point.
Thermal derating and power dissipation
Rated 630 A at 40 °C ambient, but if your panel runs hotter — and most do — the derating curve is published: 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, 520 A at 70 °C. Maximum power loss is 162 W, so factor that into your enclosure thermal budget.
Physical fit and panel integration
Mounts on a standard DIN rail. Dimensions: 248 mm high, 138 mm wide, 110 mm deep. IP40 on the front — protected against tools and wires >1 mm, but not washdown. The 3-pole footprint matches the SENTRON 3VA2 family; if you're swapping out an older frame, check the depth clearance — 110 mm is deeper than some compact MCCBs.