The 3VA2116-0HL42-0AA0 is a Siemens 3VA2 IEC Frame 160 molded case circuit breaker with a breaking capacity class E rating of Icu=200 kA at 415 V — that's the maximum short-circuit current it can safely interrupt without welding or bursting its contacts. The ETU320 LI trip unit gives you adjustable overload protection (Ir from 63 A to 160 A) and short-circuit protection (Ii from 1.5 to 12 times In). That range lets you dial in the exact motor or distribution feeder load without swapping breaker frames — handy when the BOM calls for a 125 A feeder today and a 160 A one next quarter. The neutral conductor protection is adjustable too (OFF, 50%, 100%), so you can match the neutral protection to the load balance without adding an external module.
The 3VA2 frame mounts with a nut keeper kit included — no loose hardware to lose during panel assembly. Packaging dimensions are 200 x 169 x 145 mm, so it fits in a standard distribution enclosure without tight corner clearance issues. The 4-pole configuration handles three-phase plus neutral in one unit, which keeps the wiring neat on a DIN-rail or backplate layout.