First single- or three-phase power Millermatic that welds material from 22 gauge to 1/2 in thick in a single pass. Perfect for fabrication, manufacturing, maintenance and repair.


Built-in Pulsed MIG programs

• .035 and .045 inch (0.9 and 1.2 mm) for mild or stainless steel.

• .035 and .047 inch (0.9 and 1.2 mm) for 4000 and 5000 series aluminum.

• .045 inch (1.2 mm) for metal core.


All programmed information is stored for MIG, push-pull and spool guns, and is restored after each power up.


Single- or three-phase input power with line voltage compensation for constant output even with fluctuations to the input power.


Aluminum Pulse Hot Start™ automatically provides more arc power to eliminate a “cold start” that is inherent with aluminum starts.


Superior aluminum performance. Direct connection for optional XR™ push-pull guns or Spoolmatic® spool gun. With Gun-On-Demand™, simply pull the trigger for the gun to be used and you’re ready to weld.


EXCLUSIVE! Auto-Gun Detect™ automatically adjusts voltage, wire speed and timers for faster switching between MIG, push-pull and spool guns.


Fan-On-Demand™ cooling system only operates when needed, reducing power consumption and contaminants drawn into the machine.


Industrial four-roll wire drive system features two easy-to-set, scaled, tension adjustments and quick-change reversible drive rolls for .035- and .045-inch (0.9 and 1.2 mm) wire.


Internal timers

Adjustable crater feature optimizes crater size for steel, stainless, aluminum and metal-core applications.

Crater time delay allows deactivation of crater feature for tack or small welds.


Special features

• Run-in adjustment for MIG, push-pull and spool guns.

• Built-in two-minute spot timer.

• Pre-flow and post-flow adjustment.

• View actual welding amperage/voltage during welding, and five seconds after arc has shutoff.

• SharpArc™ controls welding arc cone width in Pulsed MIG welding mode.

• Inductance control customizes weld out put characteristics in MIG welding mode.



  • Millermatic 350P power source
  • Bernard® Q300 15 ft (4.6 m) MIG gun with extra Centerfire™ contact tips
  • 10 ft (3 m) work cable with clamp
  • 10 ft (3 m) Industrial power cord (without plug) for single- or three-phase
  • Factory-installed gas solenoid
  • Argon mix regulator/flow meter
  • Factory-installed, low-mounted running gear/cylinder rack
  • .035/.045 in (0.9/1.2 mm) reversible V-groove drive rolls (order U-groove drive roll kits for aluminum welding)
  • Extra Contact tips



    Industries Interests Racing / Customizing / Restoring
    Boat / Yacht
    DIY / Home Hobbyist
    Weldable Metals Steel
    Stainless Steel
    Input Voltage 208 V 
    220/230/240 V 
    460/480 V 
    Input Phase 1- and 3-Phase
    Input Hz 60 Hz
    Input Amperage 61 A
    Current Type DC
    Rated Output 300 Amps at 32 VDC, 60% duty cycle, 1- or 3-Phase 
    Max Open Circuit Voltage 72 VDC
    Amperage Range 25 A - 400 A
    Wire Feed Speed 1.3 m/min - 17.8 m/min
    50 IPM - 700 IPM
    Wire Diameter Solid Steel 0.023 in 0.045 in
    Solid Steel 0.6 mm 1.2 mm
    Stainless 0.03 in 0.045 in
    Stainless 0.8 mm 1.2 mm
    Aluminum 0.035 in 0.047 in
    Aluminum 0.9 mm 1.2 mm
    Metal-Core 0.035 in 0.052 in
    Metal-Core 0.9 mm 1.3 mm
    Flux Cored 0.03 in 0.052 in
    Flux Cored 0.8 mm 1.3 mm
    Spool Size 12 in (305 mm)
    Net Width 19 in
    Net Height 34 in
    Net Length 41 in
    Net Weight 181 lbs
    Warranty 3 Years 
    Miller's True Blue Warranty
    Portability Running Gear / Cart (Standard)
    Weld Output CV



    Millermatic® 350P MIG Welder 200/230/460V 60Hz 1/3-Phase

    SKU: 907300




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      Phone: 305-888-6292


      10005 NW 58th Street

      Doral, FL 33178

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