The Miller Big Blue 400 Pro (Mitsubishi) is a powerhouse engine-driven welder designed for the most demanding industrial environments. At its core lies the heavy-duty, low-speed Mitsubishi S4L2 industrial diesel engine. Engineered for longevity, this Tier 4 Final compliant engine is built to operate for 10,000 hours before requiring a major overhaul, ensuring maximum uptime and return on investment for fleet managers and industrial operators. The unit delivers a robust 400 Amps of welding output at 100% duty cycle, making it capable of continuous operation in high-demand applications.
Miller has integrated their proprietary Dynamic DIG™ technology into the Big Blue 400 Pro. Unlike traditional DIG settings that offer a fixed short-clearing current, Dynamic DIG utilizes a time-based algorithm to automatically adjust the current as needed. This results in a significantly smoother and more consistent arc that adapts to the specific material, fit-up, and welder technique. Whether you are performing Stick, MIG, or Flux-Cored welding, the machine provides infinite arc control to fine-tune the heat input for tough-to-weld materials and out-of-position work.
Beyond welding, this machine serves as a substantial power generator, providing 12,000 watts of peak power and 10,000 watts of continuous single-phase power. This allows operators to run job site tools, lights, and other equipment simultaneously. The unit also features an Industrial USB Port, enabling quick software updates and the retrieval of machine log files for diagnostics and statistics. The Auto Remote Sense™ (ARS) feature eliminates the confusion of manual switching by automatically detecting when a remote control is connected to the 14-pin receptacle.
Built to withstand harsh field conditions, the Big Blue 400 Pro features an HD Powder Coat finish with a zinc-rich primer, offering rust and corrosion resistance comparable to stainless steel. Safety features include Low OCV Stick (VRD), which reduces open-circuit voltage to 15 volts when not in use, and thermal overload protection. The digital meters utilize SunVision™ technology, ensuring that welding parameters are clearly visible even in direct sunlight, enhancing operational efficiency and safety.
| Additional Information |
|---|
| Amperage:400 |
| Brand:Miller |
| Duty Cycle:100% |
| Weld Process:Multi-Process |
| Packaging Description:1 Per Ea |
| Process Type:Multi-Process, MIG, TIG, Stick, FCAW, CAC-A |
| Power Source Type:Diesel Engine |
| Engine Model:Mitsubishi S4L2 |
| Output Range:20 - 400 A |
| Auxiliary Power:12,000 Watts Peak, 10,000 Watts Continuous |
| Dimensions:32 in (H) x 26.25 in (W) x 56 in (L) |
| Net Weight:993 lbs |
| Warranty Period:3 Years |
| Voltage:n/a |
