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DC400 Multioperator Paks

DC400 Multioperator PaksDC400 Multioperator Paks

Top Features

  • Available in 4Pak and 6Pak Configurations
  • Rugged Tubular Pak-Lok-Frame
  • 400 amps DC at 36 volts and 100% Duty Cycle
  • Built to Red-D-Arc Extreme-Duty Specifications
  • Processes: Stick (SMAW), TIG (GTAW), MIG (GMAW), Multiprocess, Multioperator, Submerged Arc (SAW)

All the flexibility of a single DC400 multiprocess welder, in a multioperator package available in both a 4Pak and 6Pak welding system. Since each welder in the Pak operates independently of the others, any combination of welding processes and electrode polarities can be used.

Product Details


Individual Module Specifications
DC Amperage Range: 60 A at 22 V - 500 A at 42 V
Maximum OCV: 57 VDC
Rated CC Output: 500 A at 40 VDC, 50% duty cycle
450 A at 38 VDC, 60% duty cycle
400 A at 36 VDC, 100% duty cycle
DC Voltage Range: 12 - 42 V
Rated Input Current: 400 A, 36 VDC, 100% duty cycle: 78 A at 230 V, 39 A at 460 V, 31 A at 575 V
Weight: 544 lb (248 kg) including frame
Dimensions: H: 32" (813 mm) W: 28" (711 mm) L: 34.25" (870 mm)
4Pak Specifications
Weight: 2.666 lb (1201.1 kg)
Dimensions: H: 76" (1930 mm) W: 57" (1448 mm) D: 43.5" (1105 mm)
6Pak Specification
Weight: 3,924 lb (1779.9 kg)
Dimensions: H: 76" (1930 mm) W: 84" (2134 mm) D: 43.5" (1105 mm)


Stick (SMAW)

  • DC TIG welding with optional K930-2 TIG module

  • MIG (GMAW)
  • MIG (GMAW) welding up to 400 amps at 100% duty cycle

  • Multiprocess


    Submerged Arc (SAW)

    Additional Features

    Built to Red-D-Arc Extreme-Duty specifications including a unique, proprietary Pak-Lok connection system which permits the removal or replacement of individual units without having to disassemble the complete system. Each Pak operates on either 460 or 575 volt three-phase input power from a single power supply. An available insulated steel base (shown) provides electrical isolation for the Pak when set on a conductive surface, such as the steel deck of a ship.


    • Extreme-Duty™ stainless steel construction for operation in harsh environments
    • Outstanding arc characteristics on both constant current and constant voltage processes
    • Windings and rectifiers protected against moisture and corrosive environments
    • Single range full output current/voltage potentiometer for easy operation
    • Solid state circuitry provides extra-long life for repetitive welding applications
    • Ammeter/voltmeter
    • Three position mode switch - CC (Stick, TIG), CVI (MIG, Flux-Cored), CV (Submerged Arc)
    • Arc force control (CC mode only) to adjust short circuit current for a soft arc or a forceful driving arc
    • Arc control (pinch effect) to control splatter, fluidity, and bead shape (operates only in CVI mode)
    • Line voltage compensation for constant output regardless of input power fluctuations
    • Fan cooled with electronic and thermostatic protection from current overload and excessive temperatures
    • Amphenol and terminal strip connections for remote control and wire feeders
    • Power on/off switch with pilot light
    • 3 year warranty on parts and labor
    • Certified to ISO requirements, CSA approved
    • Rugged tubular Pak-Lok-Frame™ enclosure for increased protection

    Options, Accessories and Related Equipment

    4Pak and 6Pak configurations
    wire feeders
    2 kW 120 VAC duplex auxiliary receptacles
    remote control
    common ground bar

    Related Equipment
    LN25 wire feeders
    RC1 remote control

    DC400 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.