Kemppi MST355DCG Master T 355 DC G Power Source

KEMPPI

Kemppi MST355DCG Master T 355 DC G Power Source

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Kemppi MST355DCG Master T 355 DC G Power Source

A professional DC TIG welder delivers 350 A from a 3-phase 400 V power supply. Suitable for generator use.

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.

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

Technical Data

Description Value
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] 89 %
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 21.5 kg
Standards IEC 60974-1,-3,-10, IEC 61000-3-12, GB 15579.1

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

Datasheet