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EX350i Multioperator Paks

EX350i Multioperator Paks

Top Features

  • 350 Amps Output at 34 Volts, 60% Duty Cycle
  • Variable Hot Start and Arc Force Control
  • Inductance (Pinch) Control
  • 2 CC Modes, 2 CV Modes, 1 TIG Mode
  • Processes: Stick (SMAW), TIG (GTAW), Pulsed TIG, MIG (GMAW), Pulsed MIG, Multioperator, Advanced Process

Outstanding arc characteristics with both constant current and constant voltage welding processes in a rugged, compact design. Advanced Plug-and-Play control recognition with Amphenol connections for 24V, 42V and 115V wire feeders and 3-pin remote controls.

Product Details


Individual Module Specifications
DC Amperage Range: 5 - 425 A
Maximum OCV: 77 VDC
Rated CC Output: 350 A at 34 VDC, 60% duty cycle
275 A at 31 VDC, 100% duty cycle
DC Voltage Range: 10 - 45 V on CV Wire, 10 - 40 V on CV Flux-Cored
3-Phase Current: 275 A, 31 VDC, 100% duty cycle: 17 amps at 460 volts, 14 amps at 575 volts
Weight: 77 lb (35 kg)
Dimensions: H: 14.8" (376 mm) W: 13.3" (338 mm) L: 27.9" (709 mm)


Stick (SMAW)
Pulsed TIG
Pulsed MIG
Advanced Process

Additional Features


  • 5 - 425 amps output range multiprocess power source
  • 350 amps, 34 volts @ 60% duty cycle, 275 amps, 31 volts at 100% duty cycle, NEMA Class 1 Rating
  • Operates off of single or three phase power with no output power reduction on single phase
  • Extreme Duty™ construction protects internal components and ensures reliable operation
  • Wind tunnel technology for significantly improved reliability
  • Individual welders can be combined into 4Pak Multioperator System
  • Full range voltage and amperage Output Control with remote control capability
  • Advanced plug-and-play wire feeder control with automatic wire feeder/remote control recognition
  • Variable Hot Start control for regulating starting current in both Stick modes (minimizes electrode sticking at arc start-up) and TIG mode (when choosing between lift-arc and high-frequency assisted arc start-up)
  • Arc Force (slope) adjustment with continuous Arc Control in both CC Stick modes (for penetration control)
  • Pinch (inductance) adjustment with continuous Arc Control in both CV modes for a soft or crisp arc
  • Digital volt and amp meters for presetting weld output and displaying actual weld output
  • Fan-As-Needed operates the cooling system on-demand for improved efficiency
  • 3 pin MS style cable connection for CC stick, potentiometer type remote controls
  • 14 pin MS style cable connection for 24 volt and 42 volt auxiliary equipment and wire feeder controls
  • 14 pin MS style cable connection for 115 volt auxiliary equipment and wire feeder controls
  • Two individual units can be operated in parallel (output must be balanced equally between machines)
  • Line voltage compensation, 3 year warranty on parts and labor

Options, Accessories and Related Equipment

Voltage sensing wire feeders
Constant speed wire feeders
Spool guns
Remote control
TIG Module for high-frequency TIG welding
Advanced Process Panel for Pulsed MIG/TIG applications

Related Equipment
LN25 wire feeder
RC1 remote control
K930 TIG Module

EX350i Multioperator Paks

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Airgas, an Air Liquide company, is the nation's leading single-source supplier of gases, welding and safety products. Known locally nationwide, our distribution network serves more than one million customers of all sizes with a broad offering of top-quality products and unmatched expertise.