The Siemens 3VA1110-3ED42-0AA0-ZD00 is a 4-pole circuit breaker in the 3VA1 IEC frame 160 platform, rated 100 A with a fixed thermal-magnetic trip (TM210, FTFM). Its breaking capacity hits 25 kA Icu at 415 V — breaking capacity class N — which means it clears line-to-line faults up to that level without upstream cascading in a 400 V industrial panel. The N conductor is unprotected, and the nut keeper kit is specific to DC Power OEM builds in China.
What the ratings mean for fit
The 100 A fixed overload protection (Ir = 100 A) and fixed short-circuit protection set at 10 x In (Ii = 1000 A) mean this breaker is a straight thermal-magnetic device — no adjustable trip module, no electronic trip unit. That suits a dedicated feeder or a fixed-load branch where you don't need dial-down flexibility. The 4-pole construction with unprotected N conductor is standard for 3-phase + neutral systems where the neutral is not switched or monitored.
Deployment context
Mounts on a DIN rail or panel-mount base in a standard 160 A frame footprint. The nut keeper kit is pre-fitted for DC Power OEM applications in China — verify the kit matches your busbar or cable lug pattern before panel integration.