The Siemens 3VA2463-6HL42-0KA0 is a 4-pole IEC frame 630 molded-case circuit breaker with class H interrupting capacity — Icu rated 85 kA at 415 V AC. That 85 kA symmetrical rating at 415 V means it can safely clear a bolted fault at the main distribution board without upstream fuses needing to open first, which simplifies selective coordination studies. The ETU320 LI trip unit gives you adjustable long-time pickup (Ir) from 250 A to 630 A and instantaneous pickup (Ii) from 1.5× to 9× In, so you dial in the cable and load protection, not the other way around.
Neutral protection and accessories
Neutral conductor protection is field-adjustable to OFF, 50%, or 100% of the phase pickup — useful on 4-wire systems where the neutral may carry harmonic currents. The breaker ships with a nut keeper kit and a shunt trip (STL) rated 220-250 V DC and 208-277 V AC, so you can integrate remote tripping from a fire alarm or emergency-stop circuit without adding an external relay.
Lifecycle and sourcing
This order code carries a current lifecycle stage — it remains in Siemens' active catalog as a standard 3VA2 frame offering. For a BOM line that needs this exact breaker with the ETU320 and shunt trip, the part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.