The Siemens 3VA2463-5HN42-0AH0 is a 4-pole IEC frame 630 molded-case circuit breaker in the 3VA2 series, fitted with an ETU350 LSI electronic trip unit. Rated In=630A with overload protection adjustable Ir=250A...630A and short-circuit protection Isd=1.5...9x Ir plus instantaneous Ii=9x In, it delivers Icu=55kA at 415V — breaking capacity class M. The N-conductor protection is adjustable (OFF, 50%, 100%), and the unit ships with a nut keeper kit, two auxiliary switch changeover contacts, and one trip alarm switch changeover.
What the ratings mean for fit
The 55 kA Icu at 415 V is the ultimate breaking capacity — the breaker can safely interrupt a fault up to that level once without needing replacement. For a panel feeding a 630 A bus, that rating covers most industrial secondary-distribution fault levels. The ETU350 LSI trip unit gives you independent adjustment of long-time (Ir), short-time (Isd), and instantaneous (Ii) pickup, so you can coordinate selectively with downstream feeders. The adjustable neutral protection (OFF, 50%, 100%) is useful on 4-wire systems where neutral loading varies.
Panel integration
This is a 4-pole unit on the 3VA2 frame, designed for fixed mounting in a distribution panel or switchboard. The included nut keeper kit simplifies bus-bar connection during panel build. The two auxiliary changeover contacts and one trip alarm switch provide status feedback to a PLC or annunciator — wire them to a 24 VDC digital input module for remote trip indication.