TIG-400P ACDC-W: The Ultimate AC/DC Welding Powerhouse for Heavy Industry

2026-04-29

When the job demands consistent, high-amperage welding on both ferrous and non-ferrous metals, the TIG-400P ACDC-W delivers uncompromising performance. Engineered for professional fabricators, repair shops, and industrial manufacturing lines, this inverter-based welding machine combines raw power with fine digital control – making it equally suitable for 20mm aluminum plate and thin stainless steel sheets.

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Unmatched Output & Duty Cycle

Powered by a 3-phase 380V input, the TIG-400P ACDC-W provides a maximum rated output of 400A at 26V. In real-world conditions, you get 400A DC TIG, 360A AC TIG, and a full 400A MMA (stick) welding capability. With a 60% duty cycle at full output, you can weld continuously for minutes without overheating – a critical factor for long production runs or heavy structural joints. The 80% efficiency and Class F insulation further ensure reliable operation even in high-temperature workshops.

AC/DC Versatility for All Metals

DC TIG (5-400A): Perfect for carbon steel, stainless steel, copper, and titanium. The low initial current (as low as 5A DC) allows precise crater filling and thin-gauge work.
AC TIG (20-360A): Optimized for aluminum and magnesium alloys. The adjustable AC frequency (20-250Hz) tightens the arc cone for better penetration control, while the balance control (20-70%) lets you fine-tune cleaning action versus penetration depth.
MMA (Stick): 400A output handles all electrodes including cellulose and low-hydrogen types. A 50-meter wired remote control is available for pipeline or field work.

Advanced Waveform & Pulse Control

Unlike basic welders, the TIG-400P ACDC-W offers sine wave, triangle wave, and square wave AC modes – each providing different arc characteristics for aluminium TIG. The DC pulse frequency is adjustable from 0.2Hz to 500Hz, enabling precise heat input management and improved weld pool control. For AC pulse, the range is 0.2-200Hz. These features drastically reduce distortion on thin sections and improve out-of-position welding.

Smart Torch & Process Memory

Choose from 2T, 4T, 4T2, and SPOT torch modes. The machine is compatible with 6-pin foot pedals and a TIG torch with amperage up/down control. Pre-gas (0.1-10s) and post-gas (0-10s) are fully adjustable to protect tungsten electrodes and shield the hot crater. You can also save/load welding processes – ideal for repeatable jobs.

Built for Harsh Environments

With IP21S protection, the TIG-400P ACDC-W resists dust and dripping water. The 86kg chassis (970×490×1090mm) absorbs vibration, and multiple insulation materials protect the PCB and main circuit from moisture and contaminants. An air/water cooler switch with pressure protection lets you connect a water torch for extended high-amperage aluminum welding.

Precision That Protects Your Materials

The real AC initial current starts at 20A (and 5A DC), preventing burn-through on thin edges. Slope up (0.1-10s) and slope down (0-10s) give you smooth start/stop control, while start/stop current levels are independently settable. Whether you are performing root passes on pipe or orbital welds on aluminum vessels, this machine puts professional-grade tuning at your fingertips.

Final Verdict

If you run a heavy fabrication shop or require a single machine that can switch between delicate DC TIG and aggressive AC aluminum welding, the TIG-400P ACDC-W is a future-proof investment. Its 400A capacity, 500Hz pulse, and rugged AC/DC design outperform typical 250A hobby units – delivering industrial reliability where downtime is not an option. Upgrade your welding cell today.