Lincoln Electric Frontier 400X Diesel Welder Generator, 400A, Kubota, K3484-4
The Lincoln Electric Frontier 400X (Kubota, K3484-4) is a diesel welder generator that delivers up to 400 A in CC and CV modes (IEC rated 325 A) plus 11,000 W of continuous three-phase auxiliary power. A liquid-cooled Kubota diesel drives it for pipeline and structural steel work and for industrial maintenance on sites without grid power.
Six optimized CC/CV modes and advanced modes for STT, pulsed MIG, pulsed TIG and mechanized welding cover stick (SMAW), MIG (GMAW), pulsed MIG, flux-cored (FCAW), TIG (GTAW), pulsed TIG, STT and air carbon arc gouging (CAC-A). STT suits low-heat-input root passes on open-root pipe joints, and the CC output runs E7018 and E8018 structural electrodes.
CrossLinc sets voltage or current at the arc over the standard weld cable, so no control cable is needed even when working at height, and True Voltage Technology (TVT) compensates for voltage drop on long leads. The 7-inch digital display stores weld memory, shows maintenance alerts and offers PIN authorization for fleet control, and Auto-Stop/Start trims idle fuel use and engine wear. The welder comes with the operator's manual, a 12VDC battery and starter system, and single- and three-phase receptacles.
Highlights
Up to 400 A (IEC rated 325 A) in CC and CV modes
Three-phase auxiliary power: 11,000 W continuous
Six optimized CC/CV modes plus STT, pulsed MIG, pulsed TIG and mechanized modes
CrossLinc with True Voltage Technology (TVT)
7-inch display with weld memory, maintenance alerts and PIN authorization
Auto-Stop/Start idle management; liquid-cooled Kubota diesel
Specifications
Brand | Lincoln Electric |
Manufacturer part number | K3484-4 |
Welding output | Max 400 A (CC and CV modes); IEC rated 325 A |
Welding modes | 6 optimized CC/CV modes + advanced specialized modes |
Advanced processes | STT, pulsed MIG, pulsed TIG, mechanized welding mode |
Welding processes | SMAW, GMAW, GMAW-P, FCAW, GTAW, GTAW-P, STT, CAC-A |
Three-phase auxiliary power | 11,000 W continuous |
Engine | Kubota diesel, liquid-cooled |
Fuel type | Diesel |
Display | 7-inch digital display with weld memory, maintenance alerts, PIN authorization |
Communication | CrossLinc, True Voltage Technology (TVT) |
Idle management | Auto-Stop/Start |
What's in the box
Frontier 400X engine-driven welder/generator
Operator's manual and safety documentation
12VDC battery and starter system
Three-phase and single-phase auxiliary power receptacles
Good to know
Engine-driven equipment gives off carbon monoxide: run it outdoors only, away from doors, windows and vents.






