Kemppi Master T 355 DC Air-Cooled TIG/MMA Welder (400V, 3-Phase)

Kemppi Master T 355 DC Air-Cooled TIG/MMA Welder – 400V, 3-Phase

At Premier Welding we aim to offer amazing value for top quality products. The Kemppi Master T 355 DC is a professional DC TIG and MMA welding power source delivering up to 350 amps from a 3-phase 400 V power supply. Designed for demanding industrial environments, this air-cooled machine offers outstanding arc stability, precise control, and high energy efficiency for production, fabrication, and maintenance welding.

Manufactured in Finland, the Master T 355 DC combines Kemppi’s advanced inverter technology with a robust, ergonomic design. Smooth arc ignition, low noise operation, and excellent control at both low and high current levels ensure consistent, high-quality welds across a wide range of applications.

Package Includes

• Kemppi power source
  7" TFT control panel (AC/DC compatible)
  Kemppi Flexlite TX 225G TIG torch – 4 m or 8m
  Earth return cable (35 mm² × 5 m)

This is ideal for:

• Heavy-duty industrial fabrication
  Production and maintenance welding
  Workshops and site-based applications
  DC TIG welding requiring high output and precision
  MMA (stick) welding with large diameter electrodes

What Does it Weld?

• Mild steel
  Stainless steel
  Carbon steels
  Copper and copper alloys (DC TIG)
  MMA electrodes from 1.6 – 6.0 mm

Features

• DC TIG and MMA welding capability
  Maximum output 350 A from a 3-phase supply
  Smooth, reliable arc ignition with excellent arc stability
  Low noise levels for improved operator comfort
  High energy efficiency (up to 89%)
  Compatible with air-cooled TIG torches
  Wired and wireless remote control capability
  Bluetooth connectivity
  Kemppi Remote-Bus support
  Robust industrial design with ergonomic handling
  Designed and manufactured in Finland

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Technical Data

• Power Supply

  Mains connection voltage: 380–460 V ±10 %
  Mains connection phases: 3-phase, 50/60 Hz
  Mains fuse: 16 A
  Rated maximum input power (S1max): 12 kVA
  Maximum supply current (I1max): 16–13 A
  Effective supply current (I1eff): 11–10 A
  Recommended minimum generator size: 20 kVA
  Output – TIG

  Output range: 5 A / 1 V – 350 A / 38 V
  Duty cycle @ 40 °C (max current): 30% @ 350 A
  60% duty cycle: 230 A
  100% duty cycle: 190 A
  Output – MMA

  Output range: 10 A / 10 V – 270 A / 39 V
  Duty cycle @ 40 °C (max current): 35% @ 270 A
  60% duty cycle: 230 A
  100% duty cycle: 190 A
  Electrical Performance

  No-load voltage (MMA/TIG): 75–95 V
  Power factor (λ): 0.93
  Efficiency (η): 89 %
  Idle power consumption: 20 W
  Cooling & Connectivity

  Voltage supply for cooling unit: 380–460 V
  Welding connection type: R1/4
  Wired communication: Analog, Kemppi Remote-Bus
  Wireless communication: Bluetooth (2.4 GHz, 10 dBm)
  Environmental

  Operating temperature: -20 to +40 °C
  Storage temperature: -40 to +60 °C
  Degree of protection: IP23
  EMC class: A
  Dimensions & Weight

  Dimensions (L × W × H): 544 × 205 × 443 mm
  Weight (without accessories): 21 kg

Why Buy the Kemppi Master T 355 DC?

The Kemppi Master T 355 DC is engineered for professionals who need powerful DC TIG and MMA welding with absolute reliability. Delivering up to 350 A, it combines high duty cycles, excellent arc control, and energy-efficient performance in a compact, robust machine. With Finnish build quality and advanced control technology, it’s a dependable long-term investment for serious industrial welding applications.