Kemppi MST355DCG Master T 355 AC/DC TIG Air/Water Cooled Ready to Weld Package 400V
The Kemppi Master T 355 DC is a high-performance professional DC TIG and MMA welding power source, delivering up to 350 A from a 3-phase 400 V power supply. Designed for demanding industrial applications, it offers outstanding arc stability, precise control, and excellent duty cycles for continuous production welding.
Paired with the MasterTig Cooler M, this water-cooled configuration allows extended high-current welding with reduced torch heat, improved operator comfort, and increased torch lifespan. Advanced welding features, robust construction, and full remote compatibility make it ideal for fabrication shops, heavy industry, and site work.
The Kemppi Master T 355 DC Water-Cooled is built for professionals who require powerful, precise DC TIG welding with sustained performance. With a high 350 A output, excellent arc stability, and the benefits of water-cooled torch operation, it delivers consistent weld quality during long or high-amperage welding tasks. Designed and manufactured in Finland, it combines robust industrial construction with advanced control features, making it a reliable long-term investment for demanding fabrication and production environments.
Package Includes:-
Kemppi power source
MasterTig Cooler(for water cooled)
7" TFT control panel (AC/DC compatible)
Kemppi Flexlite TX 225G TIG torch – 4 m or 8m
Earth return cable (35 mm² × 5 m)
Trolley
Features
- Professional DC TIG and MMA welding
- 350 A output from a 3-phase 400 V supply
- Designed for water-cooled TIG torches
- Stable arc ignition and precise parameter control
- Compatible with wired and wireless Kemppi remotes
- Generator compatible (minimum 20 kVA recommended)
- Industrial-grade durability, designed and manufactured in Finland
Technical Data
| Mains connection voltage | 380...460 V ±10 % |
| Mains connection phases | 3~50/60 Hz |
| Mains connection cable type | 4G, H07RN-F |
| Mains connection cable size | 2.5 mm² |
| Maximum supply current [I1max] | 17 ... 14 A |
| Effective supply current [I1eff] | 11 ... 10 A |
| Rated maximum input power [S1max] | 12 kVA |
| Mains fuse | 16 A |
| No-load voltage, MMA/TIG [U0] | 75 ... 95 V |
| Idle power | 20 W |
| Output, duty cycle % at rated max. current, TIG | 30 % |
| Output at +40 °C, rated max current, TIG | 350 A |
| Output at +40 °C, 60% TIG | 230 A |
| Output at +40 °C, 100% TIG | 190 A |
| Output, duty cycle % at rated max. current, MMA | 35 % |
| Output at +40 °C, rated max current, MMA | 270 A |
| Output at +40 °C, 60% MMA | 230 A |
| Output at +40 °C, 100% MMA | 190 A |
| Output range, TIG | 5 A / 1 V ... 350 A / 38 V |
| Output range, MMA | 10 A / 10 V ... 270 A / 39 V |
| Power factor at rated maximum current [λ] | 0.9 |
| Efficiency at rated maximum current [η] | 86 % |
| EMC class | A |
| Minimum short-circuit power of supply network [Ssc] | 1.9 MVA |
| Stick electrode diameter | 1.6 ... 6 mm |
| Voltage supply for cooling unit | 380...460 V |
| Welding connection type | R1/4 |
| Wired communication type | Analog, Kemppi Remote-Bus |
| Wireless communication type | Bluetooth |
| Transmitter frequency and power | 2400...2483.5 MHz, 10 dBm |
| Operating temperature | -20 ... 40 °C |
| Storage temperature | -40 ... 60 °C |
| Recommended minimum generator power [Sgen] | 20 kVA |
| Degree of protection (fully installed) | IP23 |
| External dimensions, length | 544 mm |
| External dimensions, width | 205 mm |
| External dimensions, height | 443 mm |
| Weight without accessories | 22.5 kg |
| Standards | IEC 60974-1,-3,-10, IEC 61000-3-12, GB 15579.1 |