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MultiMig 621

The 621 delivers high current output with Three Phase supply voltage

Double Pulse feature - mechanically and electrically controls the welding parameters to make aluminum welding easier and for increased confidence.

  • Synergic pulsed technolgy is required by most OEMs for aluminum welding. Includes a complete set of synergic programs in memory for brazing, welding and aluminum wire.
  • Inverter technology enables precision electronic control of output power for better quality welds.
  • GREEN technology - Integrated Power Factor Correction (PFC) technology reduces input power by avoiding energy waste found in most electronic-based equipment and ultimately reduces operating costs. High Harmonic Distortion is hard on the power grid and contains non-working energy, which is costly & environmentally wasteful.
  • Two types of torches can be used with MultiMig power source - a standard MIG torch or the unique push-pull torch. The Chief Elektron Fusion Technologies push-pull system torch has an up-down digital current adjust at your finger tip, thanks to a feeder built into the grip. The very small and light weight torch (no bulky spool-gun) enables real-time control of welding process by control of the wire feed speed and current level. The push-pull system corrects many of the problems encountered when feeding and welding soft aluminum wire, down to 0.6mm.
  • Many programmable options are available to customize the unit operation to meet most working conditions. Options include: Arc Length, 2 time, 4 time, Spot Time, Pause Time, Inductance, Burn Back, Soft Start etc. Can operate in pulse synergic, synergic, or conventional mode.

Product BrochureOperating Manual


Supply VoltageMultiple, 3Ø * 
Current Output15A to 275A

Duty Cycle**

275A - 40%
255A - 60%
240 - 100% 
Inverter Synergic PulseYes
Double Pulse Yes
Wire type0.6/0.8/0.9/1.0/1.2 Fe
0.6/0.8/0.9/1.0/1.2 AL
0.6/0.8/0.9/1.0/1.2 SS
0.8/0.9/1.0 CuSi3
Upgrade Synergic programs in memoryYes 
Power units/torches1
Push-pull torch optional
Max Spool sizeØ 200 mm / 5 kg
Ø 300 mm / 15 kg
Built-in cartYes 
Torch cable lengths3.5m standard
4.0m push-pull
Programmable Options 
Trigger -2T/4TYes 
Arc Length Yes 
Spot WeldYes 
Inductance Yes 
Burnback Yes 
Soft Start Yes 
Hot Start Yes 
Crater Fill Yes 
Pre/Post GasYes 

* Selectable input voltage from 200V to 480V
**Duty Cycle - For example 200A - 20% meansthe welder can output 200A for 2 minutes non-stop, at 40°C ambient