What this breaker is
The Siemens 3VA2116-8HN32-0KG0 is a 3-pole IEC molded-case circuit breaker from the 3VA2 series, frame size 160, with a breaking capacity class L rated at Icu=150 kA at 415 V AC. Overload protection Ir is adjustable from 63 A to 160 A; short-circuit protection Isd ranges from 1.5 to 10 × Ir, and the instantaneous pickup Ii is fixed at 10 × In. This listing includes a factory-installed shunt trip on the left side, rated 208–277 V AC 50/60 Hz and 220–250 V DC, plus one auxiliary contact. The nut keeper kit is also included for secure mounting.
The ETU350 electronic trip unit gives adjustable LSI curves, which is essential for selective coordination in a distribution panel: you can set the short-time delay (Isd) to ride through downstream faults and only trip on a sustained fault within its own zone. The 160 A frame with Ir down to 63 A means one physical breaker covers a wide range of load sizes — useful for BOM consolidation. The shunt trip on the left side allows remote tripping from an emergency-stop circuit or a fire-alarm relay. The auxiliary contact provides a status signal back to the PLC or DCS for fault annunciation.