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. It carries an ETU350 electronic trip unit configured for LSI protection — long-time (overload), short-time (short-circuit with delay), and instantaneous — with a nominal current In=160 A. 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.
What the ratings mean for fit
The 150 kA breaking capacity at 415 V AC places this breaker in IEC class L. It interrupts fault currents up to that level without cascading upstream. 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.