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Maxstar® 150 STH

Light-weight and portable DC output TIG/Stick machine that utilizes both non-contact HF and Lift Arc™ TIG arc starting, plus built in pulser.

Miller Maxstar® 150 STH Product Literature (PDF)

Miller Dynasty® 200 Series

Maxstar® 150 STH

Use on 115 and 230 Volt Input Power

Use on 115 and 230 Volt Input Power  Miller's Multi-Voltage Plug (MVP) allows you to connect to common 115 or 230 volt power receptacles without the use of any tools. Simply choose the plug that fits the receptacle and connect it to the power cord.
Easier to TIG Weld Thin Gauge Material

Too much heat added to thin material usually ends up in warpage of the item being welded. By using the Pulser feature included in the Maxstar 150 STH, you minimize the heat put into the work piece. This allows you to weld that thin material with less warpage. We've also taken much of the complication out of deciding what pulse frequency to select, because we've streamlined the setting choices down to four of the most used fixed pulse frequencies.

No Need For A Gas Valve On Your TIG Torch
With a built-in gas solenoid, the Maxstar 150 eliminates the need for a bulky TIG torch with a gas valve.

Compact Design Allows for Great Portability

At less than 14 lbs, this little inverter-based TIG/Stick machine can be taken anywhere. It's an excellent tool for the maintenance and repair professional who needs a welder that can be easily taken with them to the job. This eliminates the need for long lead extensions and eliminates unwanted cable clutter.

Latest Inverter Technology Provides Amazing Power Per Pound Performance
By utilizing an inverter-based power source in the Maxstar 150s, we are able to provide superior arc starts in both the TIG and Stick settings along with excellent weld puddle control all in a small, light-weight package.


Min 0.020 in (0.5 mm) Min 0.020 in (0.5 mm)
Max 3/16 in (4.8 mm) Max 3/16 in (4.8 mm)


  • TIG (GTAW)
  • Stick (SMAW)

  • Applications

    Heavy Industrial
  • Precision Metal Fabrication
  • Heavy Fabrication
  • Pipe and Tube Fabrication
  • Aerospace
  • Aluminum Ship Repair
  • Anodized Aluminum Fabrication

  • Specifications

    Input Power
  • 115/230 Volts, 1-Phase, 50/60 Hz

  • Rated Output
    TIG 115V 150 Amps at 16 VDC, 30% Duty Cycle
    TIG 230V 150 Amps at 16 VDC, 30% Duty Cycle

    Stick 115V 100 Amps at 24 VDC, 35% Duty Cycle
    Stick 230V 150 Amps at 26 VDC, 30% Duty Cycle

    Welding Amperage Range
    TIG 115V 5 - 150 Amps
    TIG 230V 5 - 150 Amps

    Stick 115V 20 - 100 Amps
    Stick 230V 20 - 150 Amps

    Net Weight
    13.7 lb (6.2 kg)



    With the best coverage in the industry, Miller's True Blue® Warranty [PDF] delivers unparalleled peace-of-mind.

    Welding Machine