WELPRO 20–120A Inverter Welder Model WEL MMA 120

MMA Inverter Welder, compact in size and high in quality, designed to meet the needs of household welding, DIY projects, maintenance, and general installation work. It delivers a full rated welding current of up to 120 amps, providing a smooth, stable, and consistent welding arc. The MMA welding current can be adjusted from 10 to 120 amps, with the welding current clearly displayed on a digital display.

The machine supports welding electrodes ranging from 1.6 mm to 2.6 mm and is designed for continuous welding with 2.6 mm electrodes throughout the day without interruption. It also supports the TIG LIFT function, allowing optional accessories to be connected for Lift TIG welding, providing greater versatility.

The MMA welding cable polarity can be conveniently switched at the front of the machine. For enhanced safety, the VRD (Voltage Reduction Device) system reduces the output voltage at the front terminals to just 14 volts while changing the welding electrode, helping reduce the risk of electric shock.

The machine is equipped with advanced welding assistance technologies, including Hot Start (0–100% adjustable), which increases the starting current for easier arc ignition; Arc Force (0–100% adjustable), which compensates for welding current fluctuations to maintain a stable arc and produce a better-looking weld; and a built-in Anti-Stick system that immediately cuts the welding current when the electrode sticks to the workpiece, helping prevent electrode sticking and burning.

Key Features

• Delivers a full rated welding current of up to 120A, providing smooth, stable, and consistent welding performance.
  
• Adjustable MMA welding current from 10–120A, suitable for a wide range of welding applications.
  
• Equipped with a clear Digital Display for easy and accurate monitoring of the welding current.
  
• Compatible with welding electrodes ranging from 1.6 mm to 2.6 mm.
  
• Designed to support continuous welding with 2.6 mm electrodes for extended periods without interruption.
  
• Convenient front-panel MMA polarity terminals allow the welding cable polarity to be switched according to the application.
  
• Enhanced safety with VRD (Voltage Reduction Device), reducing the output voltage to just 14V during standby/electrode changing to help reduce the risk of electric shock.
  
• Supports an optional TIG LIFT function for Lift TIG welding when used with additional accessories.
  
• Built-in Anti-Stick system automatically cuts the welding current when the electrode sticks to the workpiece, helping prevent electrode sticking.
  
• Hot Start, adjustable from 0–100%, increases the welding current when starting the arc for easier ignition.
  
• Arc Force, adjustable from 0–100%, compensates for welding current fluctuations when the arc length varies, helping maintain arc stability and improve weld quality.

Technical Specifications

• Brand : WELPRO
  
• Model : WEL MMA 120
  
• Product Type : MMA Inverter Welder
  
• MMA Welding Current Range : 10–120 A
  
• TIG Welding Current Range (TIG LIFT) : 10–120 A
  
• Electrode Diameter : 1.6–2.6 mm
  
• Input Power : Approx. 4.2 kVA (approx. 3.6 kW)
  
• Input Voltage : AC 220V ±15%, 1 Phase, 50Hz
  
• No-Load Voltage : 14V with VRD ON / approx. 60–67V under normal conditions
  
• Tungsten Electrode Diameter : 1.6–2.4 mm (TIG LIFT mode)
  
• Power Factor : 0.93
  
• Insulation Class : Class F
  
• Display : Digital Display
  
• Safety System : VRD – reduces voltage to 14V during welding standby

Package Includes

• 1 × Inverter Welder
  
• 1 × Electrode Holder: H01N5-D, 16 mm² / 4 m
  
• 1 × Earth Clamp: H01N5-D, 16 mm² / 3 m