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Kemppi Master T 355 DC Water-Cooled TIG/MMA Welder
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.
Package Includes
Kemppi power source MasterTig Cooler 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
This is ideal for:
Professional DC TIG welding of mild steel and stainless steel High-amperage TIG welding requiring water-cooled torch performance Continuous production and fabrication welding Industrial workshops and heavy fabrication environments Maintenance and repair applications MMA (stick) welding in industrial settings
What Does it Weld?
Mild steel Stainless steel Carbon steels Copper and copper alloys (DC TIG) MMA electrodes (stick) – 1.6 to 6.0 mm
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
Technical Data – Power Source (Master T 355 DC) Mains connection voltage: 380–460 V ±10 % Mains phases: 3-phase, 50/60 Hz Mains fuse: 16 A Maximum supply current (I1max): 16–13 A Effective supply current (I1eff): 11–10 A Rated maximum input power: 12 kVA No-load voltage (MMA/TIG): 75–95 V Idle power: 20 W TIG Output Maximum output: 350 A @ 30 % 230 A @ 60 % 190 A @ 100 % Output range: 5 A / 1 V – 350 A / 38 V MMA Output Maximum output: 270 A @ 35 % 230 A @ 60 % 190 A @ 100 % Output range: 10 A / 10 V – 270 A / 39 V Power factor: 0.93 Efficiency: 89 % Stick electrode size: 1.6 – 6.0 mm Degree of protection: IP23 Operating temperature: -20 °C to +40 °C Recommended generator size: 20 kVA Dimensions & Weight (Power Source) Length: 544 mm Width: 205 mm Height: 443 mm Weight (without accessories): 21 kg
Technical Data – Cooling Unit (MasterTig Cooler M) Supply voltage: 220–460 V Tank capacity: 3 litres Cooling power:
0.9 kW @ 1.0 l/min 1.0 kW @ 1.6 l/min Maximum coolant pressure: 4 bar Recommended coolant: Kemppi MGP 4456 Idle power consumption: 5 W Degree of protection: IP23S Dimensions & Weight (Cooler) Length: 615 mm Width: 206 mm Height: 268 mm Weight (without accessories): 12.5 kg
Communication & Control Wired communication: Analog, Kemppi Remote-Bus Wireless communication: Bluetooth Remote compatibility: Hand, foot, and on-torch controls
Why Buy the Kemppi Master T 355 DC Water-Cooled?
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.
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