What this 3VA1 delivers
That rating means it clears high-fault currents on a 400 V distribution bus without the arc flash escalating upstream; it's sized for main or heavy-feeder protection in an industrial panel. The TM210 thermal-magnetic trip unit is set with a fixed overload Ir of 80 A and a fixed short-circuit pickup Ii of 10 × In (800 A). No dials to mis-adjust — what's on the nameplate is what you get, which simplifies coordination studies and keeps the BOM repeatable. Four poles with 100% neutral conductor protection, plus a nut keeper kit, and the order-code suffix flags this as a DC Power OEM variant built for China-market integration. The nut keeper holds the line-side lug in place during high-vibration transport — a small detail that saves a call-back on a new line.