MMA-400 — Industrial Stick Welding Power Built for the Toughest Jobs
When you're welding on a pipeline, an offshore rig, or a heavy fabrication floor, you need a machine that delivers rock-solid arc stability without flinching. The MMA-400 Industrial Stick Welder from Doughty is built for exactly that — 350A output, dual IGBT modules, and a feature set designed for professional welders who can't afford downtime.
Why Professionals Choose the MMA-400:
Key Features
- 350A output, compatible with 6010/6011/6013/7018 rods, providing deep penetration welding.
- Dual IGBT module design ensures industrial-grade arc stability and impulse current suppression.
- Hot start & anti-stick technology for instant arc ignition and automatic rod release.
- Adjustable arc force and adaptive arc enhancement maintain stability over long cable runs.
- Portable 16.4kg body—easy to move yet robust enough for industrial production.
Suitable Scenarios
- Pipeline construction, shipbuilding, heavy steel structures.
- Offshore platforms or outdoor job sites with unstable power supply.
- Continuous long-duration work, e.g., 24-hour welding with 4.0mm rods.
- Precision welding of carbon steel, stainless steel, cast iron, and nickel alloys.
- Mobile operations and field maintenance—easy to transport and deploy quickly.
Differentiation from Competitors
- Up to 350A output with dual IGBT modules for a more stable, deeper arc.
- Unique hot start, anti-stick, and adaptive arc enhancement reduce downtime and user error.
- High-duty capability (60% @ 350A), allowing continuous operation rarely seen in this class.
- Handles 380V ±15% unstable power inputs, adapting to diverse job site conditions.
- Combines portability with industrial strength—lightweight without sacrificing performance.
Technical Specifications:
- Power Input: 3-phase 380V, 50/60Hz
- Max Load Power: 15.0KW | Rated Input: 22.8A
- Output Range: 40–350A
- Open Circuit Voltage: 65V DC
- Duty Cycle: 60%@350A / 100%@270A
- Max Electrode: 6.0mm
- IP Grade: IP21S | Insulation Grade: F
- Dimensions: 595×315×530mm | Weight: 16.4kg / 21.5kg (N.W/G.W)
MMA-400 Industrial Stick Welder : FAQ
Q1: What welding rods can I use?
A1: Supports 6010, 6011, 6013, 7018 rods up to 6.0mm.
Q2: Can it handle long cable runs?
A2: Yes, adaptive arc force ensures stability over 100-meter cables.
Q3: Is it suitable for continuous work?
A3: Yes, 60% duty cycle at 350A, 100% at 270A for long-duration welding.
Q4: Can I use it with unstable power?
A4: Works with 3-phase 380V ±15%, including generators.
Q5: Is it portable?
A5: At 16.4kg, it’s easy to carry for on-site work yet industrial-grade.
Q6: What materials can it weld?
A6: Carbon steel, stainless steel, mild steel, cast iron, nickel alloys.
Backed by Doughty's commitment to quality and reliability.
Your specific delivery date will depend on the dispatch country and delivery address.
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All of our products are made with care and covered for one year against manufacturing defects
Contact us 24 hours a day, 7 days a week Call Us: 0123-456-789
Subtitle from happy customers
Vinova Testimonials
I've used all types, brands, mig, tig, spool guns, arc, and for the money this little guy surprised me, outperformed my expectations, hopefully it lasts, welded for 2 hours straight today right out the box. Only downfall is the fixed whip and lack of ability to run gas. But for a portable 110 mig on a 100 ft extension cord it delivered
Jetsk Jon
This mig welder works great for what it is. It's a light duty welder, and they make no claims for it being anything else, but it's absolutely perfect for most home and hobbyist use.
Jesse C. Benton
I ran weld’s within its duty cycle and it performed perfectly. I’m truly impressed by the little button that adjusts the wire feed automatically. As far as performance, weak. If’n it can put out 80 amps I’d be impressed and if cranked up? Well it just kicks off. Maybe my units defective, idk. Nice even arc below 3/4 power though.
Robert Davis
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