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West Country Welding Supplies

Miller Maxstar 150 STH - West Country Welding Supplies, UK - West Country Welding Supplies, UK

Miller Maxstar 150 STH

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Miller Maxstar 150 STH


  • Low OCV Stick is a simple design that reduces the opencircuit voltage to 15 volts when the welding power source is not in use. This circuit design is now built into the Maxstar 150 STH eliminating the need for add-on voltage reducers.
  • Portable in the shop or at the job site—at 13.7 lb the shoulder strap allows the end user to easily move from location to location.
  • Best in class TIG and Stick arc characteristics for those demanding jobs.
  • Built-in pulsing capabilities allow the operator to select from four fixed pulse frequencies to satisfy the application.
  • HF start for non-contact arc starting that eliminates tungsten or material contamination.
  • Lift-Arc™ start provides TIG arc starting without the use of high frequency.
  • Easy installation — Auto-Line™ provides state-of-the-art flexibility to the end user. The Auto-Line circuitry automatically connects to 115–230 VAC, single-phase power without removing the covers to relink the power source. No longer is there a concern if you have the correct machine for the shop or job site.
  • Inverter-based, DC power source has a simple-to-use operator interface providing only the necessary controls in a compact machine.
  • Thermal overload protection with indicator light helps prevent machine damage if the duty cycle is exceeded or airflow is blocked.
  • Single amperage range allows operator to accurately set amperage on both 115 or 230 V primary power.
  • Full function remote control allows operator to crater out when doing critical work.
  • Selectable trigger configuration allows the operator to choose standard or 2T trigger method to meet the application.
  • Built-in gas solenoid eliminates the need for bulky torch with a gas valve.
  • Adaptive Hot Start™ for Stick arc starts automatically increases the output amperage at the start of a weld should the start require it. Prevents the electrode from sticking and creating an inclusion.

Industrial Applications

  • Dairy Industry
  • Food/Beverage Industry
  • Restaurant/Kitchen Repair
  • Experimental Aircraft
  • Petrochemical
  • Shipboard Installation/Repair
  • Maintenance Repair

Technical Specifications


  • TIG (GTAW)
  • Pulsed TIG (GTAW-P)
  • Stick (SMAW)

Input Power

  • 1-Phase Power

Rated Output

  • 115 VAC Stick
    70 A at 22.8 VDC, 100% Duty Cycle
    100 A at 24.0 VDC, 35% Duty Cycle
  • 115 VAC TIG
    100 A at 14.0 VDC, 100% Duty Cycle
    150 A at 16.0 VDC, 30% Duty Cycle
  • 230 VAC Stick
    100 A at 24.0 VDC, 100% Duty Cycle
    150 A at 26.0 VDC, 30% Duty Cycle
  • 230 VAC TIG
    100 A at 14.0 VDC, 100% Duty Cycle
    150 A at 16.0 VDC, 30% Duty Cycle

Max. Open-Circuit Voltage

  • 90, 12–16 V*

Amps Input at rated output, 50Hz 400/230

  • 115 VAC Stick
    17.4, 100% Duty Cycle
    26.4, 30% Duty Cycle
  • 115 VAC TIG
    18.4, 100% Duty Cycle
    28.0, 30% Duty Cycle
  • 230 VAC Stick
    13.1, 100% Duty Cycle
    21.6, 30% Duty Cycle
  • 230 VAC TIG
    8.3, 100% Duty Cycle
    14.2, 30% Duty Cycle


  • H: 9 in (229 mm)
    W: 5-1/2 in (140 mm)
    D: 13-1/4 in (337 mm)

Weight (Net)

  • 13.7 lb (6.2 kg)

*Sense voltage for stick and lift-arc TIG.

Contact us for more details or to discuss any of your welding needs

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