Key Specifications (MMA-400T) Feature Specification (Commonly Listed) Impact on Use Welding Process MMA (Stick) / TIG (Lift TIG) This model (often listed as TIG/MMA-400) typically offers both stick welding and optional TIG welding capability. Technology Advanced Full-Bridge IGBT Inverter Provides the most stable, smooth, and powerful DC arc for industrial use. Max Output Current 400 Amps (DC) Extremely high power, capable of welding the thickest steel sections and running large welding rods (up to $5.0 \text{ mm}$) for prolonged periods. Input Voltage 3P AC $380\text{V}$ (Three-Phase) Crucial: Requires an industrial three-phase power supply or a large three-phase generator.
