The inverter-rectifier welding unit TIG-200PAC is the best for alternating-current (AC) welding and direct-current (DC) welding of various parts from aluminium and aluminium alloys (TIG AC welding mode), and parts from steel, non-ferrous metals, and copper alloys (TIG DC welding mode). The welding unit can be used for manual arc welding with coated stick electrodes (MMA welding mode). The welding unit ensures reliable arc starting, arc stability, high quality of welding joints, and operating convenience.