400 Pro Mitsubishi Welder/Generator

This Mitsubishi-diesel welder/generator is rated for a maximum 410-amp output, with a duty cycle of 60 percent at 300 amps rather than a continuous full-power rating, and at 1,083 pounds it is the heaviest of the plain (non-ArcReach) 400-series machines in this lineup. It suits single-phase heavy industrial shops that cycle between welding and generator use.

Where this one differs

Unlike the ArcReach version of this engine package, control stays at the machine rather than the feeder. Quick-reference output figures put DC stick and DC TIG at 20 to 400 amps and FCAW/MIG at 14 to 40 volts, with generator capacity peaking at 12,000W and 10,000W continuous, matched to an idle sound rating of 68.7 dB and 72.1 dB under load.

Fitment and setup notes

• Case size runs 56 inches long by 26.25 wide and 32 tall; confirm it clears your trailer deck or storage bay
• This is a Career Welder-rated, single-phase, DC-polarity machine
• It ships new with a 3-year manufacturer's warranty
• Plan for a 1,083-pound shipping weight when arranging unloading

Controls stick to the same short list used across this diesel range: metering, hot start, idle control, a block heater, and a powder coat meant to resist rust on site.

Is the 60 percent duty cycle a limitation for me? It means sustained full-power welding at 300 amps is rated intermittently rather than continuously; check your typical arc-on time against that figure.

Why is it heavier than other 400-amp models here? The listed shipping weight of 1,083 pounds reflects this particular build.

Specifications