The TM240 ATAM trip unit gives adjustable overload protection (Ir = 350 A to 500 A) and fixed short-circuit pickup (Ii = 5 to 10 x In). The 100% N-conductor protection means the neutral pole is fully rated, not reduced — important for 4-wire systems with harmonic content or unbalanced loads where the neutral carries phase current. This variant includes a nut keeper kit and is configured for a DC Power OEM in China — the nut keeper secures the busbar or cable lug connection against vibration in transport or operation, a detail that matters if you're panel-building for a solar farm or battery storage system where the breaker sees road freight before commissioning.
Siemens 3VA1450-4GF42-0AA0-ZD00 Circuit Breaker, 500A, 36kA
MPN3VA1450-4GF42-0AA0-ZD00
Siemens 3VA1 IEC frame 630 circuit breaker, breaking capacity class S, Icu=36kA @ 415V, 4-pole, line protection TM240 ATAM, In=500A, overload Ir=350A...500A, short-circuit Ii=5...10 x In, N conductor protection 100%, nut keeper kit for DC Power OEM in China.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
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Frequently asked questions
What are the key ratings for 3VA1450-4GF42-0AA0-ZD00?
IEC frame 630, breaking capacity class S with Icu = 36 kA at 415 V, 4-pole, TM240 ATAM trip unit, In = 500 A, overload protection Ir adjustable 350 A to 500 A, short-circuit protection Ii = 5 to 10 x In, and 100% N-conductor protection.
MPN
3VA1450-4GF42-0AA0-ZD00