The Siemens 3VA1110-5EF32-0JC0 is an IEC frame 160 molded-case circuit breaker from the 3VA1 series, built for line protection with a thermal-magnetic TM240 trip unit. It's rated In=100A continuous, with overload pickup adjustable Ir=70A...100A and instantaneous short-circuit pickup Ii=5...10 x In. The breaking capacity class M delivers Icu=55kA at 415 VAC — enough for high-fault industrial distribution panels without cascading upstream breakers.
This 3-pole breaker ships with a factory-installed shunt trip (STL) rated 110-127 V DC/AC 50/60 Hz and two auxiliary switches (HQ). The nut keeper kit is included, which saves a few minutes on panel assembly — the nuts stay captured on the busbar studs while you torque down. Mounts on a standard DIN rail or direct to the backplate; the frame 160 footprint is common across the 3VA1 range, so busbar and cable lug kits transfer if you swap ratings later.
The TM240 thermal-magnetic trip provides fixed magnetic pickup at 5 to 10 times In, which suits motor branch circuits and general distribution where you need moderate short-circuit withstand without nuisance tripping on inrush. The 55kA interrupting rating at 415 VAC puts it in the 'M' (medium) breaking capacity class per IEC 60947-2 — appropriate for main or sub-feed breakers in industrial switchboards where fault current runs high but not into the ultra-high range.