The Siemens 3VA2510-5HN42-0KH0 is a 4-pole IEC molded-case circuit breaker on the 3VA2 frame 1000, rated In=1000A with an ETU350 LSI trip unit. Its headline breaking capacity is Icu=55kA at 415V AC — class M in the 3VA2 family, meaning it handles high fault currents typical of industrial main feeders or large distribution panels. The LSI protection profile (Long-time, Short-time, Instantaneous) gives you adjustable overload Ir=400A...1000A, short-circuit pickup Isd=1.5...10 x Ir, and a fixed instantaneous Ii=10 x In. The N-conductor protection is adjustable OFF/50%/100%.
This breaker ships with a shunt trip fitted on the left side, rated 208-277V AC 50/60 Hz and 220-250V DC — a remote-trip coil for emergency-off or supervisory circuits. Two auxiliary switches are included for status feedback to a PLC or panel indication. The nut keeper kit is factory-installed, which simplifies panel assembly: no loose hardware to drop into live gear during installation.