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D402K 4+12 CC/CV Diesel Generator Welder

D402K 4+12 Diesel Engine-Driven CC/CV Generator Welder

Top Features

  • 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
  • Processes: Air Carbon Arc Cutting, Flux-Cored (FCAW), MIG (GMAW), Stick (SMAW), TIG (GTAW)

The 4+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: 400 A at 23 VDC 30% duty cycle
Single-Phase 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: 32" (813 mm) W: 26" (660 mm) L: 56" (1422 mm)
Product specifications and availability may vary by country


Air Carbon Arc Cutting

Flux-Cored (FCAW)


Stick (SMAW)


Additional Features

Output adjustment is via a potentiometer-type, full-range, Amperage/Voltage Adjust 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 on the front panel.

All Product Resources

Options, Accessories and Related Equipment

Construction trailer
RC1 (3-pin or 3-pin with 14-pin adapter) remote control
Miller RHC-14 (14-pin) remote control

Related Equipment
12VS wirefeeder or LN25 wirefeeder for CV MIG welding processes

D402K 4+12 CC/CV Diesel Generator Welder

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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.