What this breaker delivers
The Siemens 3VA1332-4GF42-0AA0-ZD00 is a 4-pole IEC frame 400 circuit breaker with breaking capacity class S, Icu=36kA at 415V. It ships with a TM240 thermal-magnetic trip unit: In=320A, Ir adjustable from 224A to 320A, Ii adjustable from 5 to 10 times In. The N conductor is protected at 100% of the phase rating — a detail that matters for 4-wire distribution panels where the neutral carries harmonic or unbalanced current.
Integration notes
Mounts in a standard IEC panel — the 4-pole footprint occupies the same DIN-rail or bolted-backplane space as other 3VA1 frame breakers, so a panel layout already designed for a 3VA1 accepts this unit without re-drilling. The nut keeper kit (included per the order-code suffix) is specified for DC Power OEM assembly in China — it retains the terminal nuts during vibration, which is a practical concern for breakers shipped inside pre-wired enclosures.