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Magnum THF 400 PULS AC/DC TIG inverter welder
The Magnum THF 400 PULS AC/DC is an industrial inverter welder built for the most demanding welding work. With a strong 400A output on a three phase 400V supply, it is a dependable tool for professional production plants and workshops. Full TIG AC/DC functionality with advanced double pulse plus an efficient MMA mode let the machine weld practically every metal, aluminium, magnesium, stainless steel, titanium and copper included, and keep the quality and the appearance of the welds at the top level.
Key features
Strong 400A output and a high 60% duty cycle for industrial use.
TIG AC/DC welding, at home on aluminium, stainless steel and other metals.
Advanced welding with Double Pulse for welds with the stacked bead look.
Contactless HF (High Frequency) arc ignition for a clean start of the weld.
Full control over the arc parameters: AC balance, wave shape, pulse frequency.
Efficient MMA welding mode with Arc Force adjustment and a Hot Start function.
Modern IGBT inverter technology that brings stability and high energy efficiency.
Prepared for work with a cooling unit for the highest TIG torch output.
Technical details
Technology in detail
The heart of the THF 400 welder is inverter technology based on IGBT transistors, which guarantees a stable arc, high efficiency and room for advanced functions. The key technology is TIG AC/DC welding with double pulse. The AC mode with balance and wave shape adjustment (square, sine, triangular) allows precise aluminium welding with excellent cleaning action and control over penetration. The double pulse function changes what a weld looks like: by modulating current and pulse frequency it gives welds with the characteristic stacked bead appearance, on a par with the most expensive machines on the market. It also cuts heat input a great deal, which keeps distortion down when welding thin material. In MMA mode the adjustable Arc Force and Hot Start functions give excellent welding behaviour with every type of electrode.
Recommended applications
- Professional production and repair of aluminium structures (tanks, frames, wheel rims).
- Food and chemical industry (welding stainless steel pipework and tanks).
- Advanced locksmith and production work in workshops.
- Automotive, aerospace and shipbuilding sectors.
- Heavy assembly and rebuilding work in MMA mode.
- Welding titanium and other special alloys.
Control panel
The control panel was drawn up for professionals who need quick and precise access to every welding parameter. A large, legible digital display shows the key values, and the ergonomic knobs and buttons allow stepless adjustment of functions such as peak and base current, pulse frequency, AC balance, current up slope and down slope, and gas flow before and after welding. The logical layout of the panel makes operation intuitive and gives full control over the welding process.
Product specification
| Feature | Value |
|---|---|
| Power supply | AC 400V / 50Hz |
| Welding methods | TIG AC/DC (HF), MMA |
| Build technology | IGBT inverter |
| Maximum welding current [A] | 400 |
| Duty cycle TIG [%] | 60% at 400A |
| Welding current adjustment | Stepless |
| Maximum power draw [kVA] | 18.5 |
| Weight [kg] | 35 |
What do you get in the set?
- Magnum THF 400 PULS AC/DC machine
- Professional liquid cooled TIG welding torch, type T-18 (4m)
- MMA electrode holder
- Earth cable
- Operating manual in Polish
- Set of wear parts for the TIG torch
About the Magnum brand
Magnum is a Polish brand that has been one of the leaders of the welding market since 1996. Its business model rests on supplying technically advanced machines (made in Asia to Polish specifications) at a very competitive price. The strength of the brand is its excellent value for money, a deep offer that forms a complete workshop ecosystem, plus dependable service and a door-to-door warranty, which build customer trust from hobbyists up to professional workshops.
