What the ratings mean for your panel
The 3VA2463-7HN42-0KF0 is a Siemens 3VA2 IEC frame 630 circuit breaker with a breaking capacity class C rating of Icu=110kA at 415 V AC. That 110 kA figure means it can safely interrupt a fault current up to that level without failing catastrophically — critical for high-fault installations like large transformer secondaries or distribution switchboards where upstream SCCR needs to be held. The 4-pole construction with adjustable N-conductor protection (OFF, 50%, 100%) makes it suitable for 3-phase + neutral systems where you need to protect the neutral against harmonics or unbalanced loads. The ETU350 LSI trip unit provides adjustable long-time (Ir=250A...630A), short-time (Isd=1.5...9x Ir), and instantaneous (Ii=9x In) protection. The LSI designation means it has short-time delay for selectivity coordination downstream — you can set the Isd delay to ride through inrush without nuisance tripping, then clear a bolted fault fast. The shunt trip left (208-277 V AC 50/60 Hz, 220-250 V DC) and auxiliary switch are factory-installed accessories, so this breaker arrives ready for remote tripping and status feedback without field retrofitting.
Deployment context
The 3VA2 frame mounts on a DIN rail or panel base inside a distribution enclosure. The 630 A frame size and 110 kA interrupting rating place it in main or feeder breaker duty for industrial switchboards, not branch-circuit protection. The shunt trip and auxiliary switch give the controls integrator a clean way to interface with a PLC or safety relay for emergency-off or status monitoring without adding external contactors.