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Miller® XMT® 350 1 or 3 Phase CC/CV Multi-Process Welder With 208 - 575 Input Voltage, Auto-Line™ Power Management Technology And Adaptive Hot Start™

Airgas Part #:MIL907161011

Manufacturer Part #:907161011

$8,495.00 /Each

Item Details

  • Miller® XMT® 350 CC/CV 3-Phase Multiprocess Welder with Auto-Line power management technology allows for any input voltage hook-up with no manual linking, providing convenience in any job setting. Welder with auxiliary power operates at voltage rating of 208 - 575 VAC with frequency of 60 Hz. Welding machine provides 350 A of welding output at 60% duty cycle that enables improved deposition through using larger diameter electrodes common in construction applications. Welder has large and dual digital meters to offer ease of view and presettable to setting welded output for convenience. It is ideal for use in construction, shipbuilding, heavy manufacturing, rental, railroad, truck and trailer manufacturing.


  • Auto-Line™ Power Management technology allows for any input voltage hook-up (208-575V) with no manual linking, providing convenience in any job setting. Ideal solution for dirty or unreliable input power
  • 350 amps of welding output at 60% duty cycle enables improved deposition through using larger diameter electrodes common in construction applications
  • Tweco-style output connectors provided standard on the XMT-350 VS. Eliminates the need for cable adapters at the construction site
  • Power factor of .95 enables smaller fuses/breakers and primary wiring. Primary amperage draw at rated output is 25% less than the competition
  • Exceptional electrical efficiency. At 400 amps, efficiency is 87.24%, this helps to reduce the utility bill or fuel supply required to weld
  • Inverter arc control technology provides greater puddle control for superior 6010 Stick electrode performance
  • Auto Remote Sense enables unit to automatically use remote control if connected to remote control receptacle (CC/CV models only)
  • Reduced OCV operation - an internal dip switch enables reduced open-circuit voltage Stick welding capability. OCV is typically below 15 volts
  • Process selector switch reduces the number of control setup combinations without reducing any features
  • Large, dual digital meters are easy to view and presettable to ease setting weld output
  • Pulsed MIG capabilities with optional Optima™ control reduces spatter and distortion, allows better out-of-position puddle control, and provides potential reduction of fume particle emission
  • Lightweight, aerospace-grade aluminum case offers protection with the benefit of reduced weight
  • Optional - 115 VAC auxiliary power provides 10 amps of circuit-breaker-protected power for water circulators, ect
  • Optional gas solenoid for TIG welding
  • Fan-On-Demand™ - Internal power source cooling system that only works when needed, keeping internal components cleaner
  • Lift-Arc™ start provides TIG arc starting without use of high frequency
  • Wind Tunnel Technology™ protects electrical components and PC boards from contamination, significantly improving reliability
  • Adaptive Hot Start™ automatically increases output amperage at the start of a weld should the start require it and prevents the electrode from sticking and creating an inclusion
  • LVC™ Line Voltage Compensation - Keeps output of the power source constant regardless of fluctuation in input power 10%


  • ISO 9001 registered quality system
  • True Blue® Three year warranty
  • Power source is warranted for 3 years, parts and labor
  • Original main power rectified parts are warranted for 5 years
  • Gun warranted for 90 days, parts and labor


  • Auto-Line™ Power Management Technology
  • Auxiliary Power


  • Construction
  • Shipbuilding
  • Railroad
  • Truck/Trailer Manufacturing
  • Fabrication
  • Repair Shops
  • Rental Fleets
  • Power Generation Plants

Product Attributes

Trade Name

» XMT® 350
» XMT®

Input AC Voltage

» 230 V
» 208 V
» 220 V
» 240 V
» 380 V
» 400 V
» 440 V
» 460 V
» 480 V
» 575 V

Output Mode



» Arc Cutting (CAC-A)
» Flux Cored (FCAW)
» Stick (SMAW)

Output Voltage

» 38 V
» 10 V


» 1 or 3 Phase


» 60 Hz

Amperage Range

» 425 A

Duty Cycle

» Single-phase: 300 Amps At 32 Volt at 60% Duty Cycle
» Three-phase: 350 Amps At 34 Volt at 60% Duty Cycle

Power Supply Type

» Inverter


» 80 lb

Output DC Amps Max

» 425

Output AC Amps Max

» 425