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D302K 3+12

D302K 3+12 Portable Diesel Welder With Trailer for Rent

Top Features

  • DC CC CV 12kW
  • Built to Red-D-Arc Extreme-Duty Specifications
  • Kubota V1505-E2BG1, Tier 2, 20.2 HP Liquid-Cooled Diesel Engine
  • 12,000 Watts Peak, 10,000 Watts Continuous 120/240 VAC Power
  • Low Noise Level - 74 dba at 13 ft (94 Lwa) at maximum output
  • Processes: Stick (SMAW), TIG (GTAW), MIG (GMAW), Air Carbon Arc Cutting, Flux-Cored (FCAW)

The 3+12 is a constant current/constant voltage, DC diesel engine-driven welder with a high-efficiency, three-phase welding generator that requires less fuel but has enough power for gouging with up to 1/4" carbons.

Product Details


DC Amperage Range: 20 - 410 A
DC Voltage Range: 14 - 40 V
Maximum OCV: 65
Rated CC Output: 300 A at 32 VDC 60% duty cycle
400 A at 23 VDC 30% duty cycle
Auxiliary Power: 12,000 watts peak, 10,000 watts continuous 83/42 A, 120 GFCI/240 VAC, 60 Hz
Fuel Capacity: 11.5 gallons (43.5 L)
Weight: 1,200 lb (544 kg)
Dimensions: H: H: 32" (813 mm) W: 26" (660 mm)
L: 56" (1422 mm)


Stick (SMAW)

  • Lift-Arc DC TIG

  • MIG (GMAW)

    Air Carbon Arc Cutting

    Flux-Cored (FCAW)

    Additional Features

    The D302K 3+12 is a 300 amp @ 60% duty cycle, constant current, constant voltage, DC diesel engine-driven welder with 12,000 watts peak and 10,000 watts continuous 120/240 VAC auxiliary power. Its high-efficiency, three-phase welding generator requires less fuel and has enough power for gouging with up to 1/4" carbons. Output adjustment is via a potentiometer-type, full-range, Amperage/Voltage Adj ust Control and a six-range Process/Contactor Control switch which includes four arc drive (dig) settings in Stick mode. Remote contactor control, as well as remote amperage and voltage control, are via 3-pin and 14-pin MS style receptacles mounted on the front control panel.

    Kubota V1505-E2BG1, Tier 2, liquid-cooled, four cylinder, 20.2 HP @ 1800 rpm, 92 with automatic engine shutdown


    • Low Noise Level of only 74 dba at 13 ft (94 Lwa) at maximum output
    • Thermal Overload Protection prevents machine damage if the duty cycle is exceeded or airflow is blocked
    • Dual Digital Weld Ammeter and Voltmeter with Troubleshooting Diagnostic Display
    • Tailored Arc Control (DIG) allows arc characteristics to be changed for specific applications and electrodes
    • Auto Sense Remote (ASR) automatically detects a remote control connection in both Remote Control Receptacles
    • 3-pin Remote Control Receptacle for operation with Red-D-Arc potentiometer-type remote controls
    • 14-pin Remote Control Receptacle for operation wit h 24 volt and 115 volt wire feeders
    • Lift-Arc for DC TIG arc starting without the use of a high-frequency generator
    • Automatic OCV Reduction (Low CV) drops open-circuit voltage to 41 V when the welding machine is not in use
    • Kubota V1505 clean running Tier 2 industrial diesel engine designed for 10,000 hours before first basic overhaul
    • Runs at a constant 1800 RPM for longer service intervals, long engine life and low operating expenses
    • Fuel Level Gauge/Hour meter with Engine Shutdown Indicator Light and Battery Ammeter
    • Two 120 VAC, 20 A GFCI Duplex Receptacles and one 120/240 VAC, 50 A Receptacle

    Options, Accessories and Related Equipment

    Construction trailer
    CV MIG welding wire feeder
    Remote control

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    D302K 3+12

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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.