Inverter DC TIG Welding Machine
(High voltage start method)



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* In addition to this product (welding power source), a torch and gas regulator are required for welding.

Key functions

  • Reduces noise through an arc start without using high frequencies. Also reduces electrode wear

  • Improved arc start performance that is ideal for welding for plant construction, etc.

  • Versatile waveform control that can be selected according to the application

  • Case structure with improved transportability and storage efficiency enables stacking

  • 3-phase / single-phase, 200 / 220 V, 50 / 60 Hz (common)


High frequency noise at welding sites causes stress

High frequencies are not used when starting the arc, thereby reducing the impact of noise on other electronic devices. Furthermore, this model is equipped with a noise filter as standard.

Operating costs

This model achieves a stable output with high-speed control 1.6 times faster than conventional inverter machines. It is also equipped with energy saving functions.

There is not enough storage space

The body is 7 kg lighter than conventional models. This product has adopted a case structure, allowing it to be vertically stacked in two tiers for transportation or three tiers for storage, thereby enabling effective use of space.

Strengths and Features

Noise reduction through an arc start without using high frequencies

Noise reduction through an arc start without using high frequencies

Since no high frequencies are used when starting the arc, high frequency noise that affects other electronic devices is suppressed. Since the electrode surface is not roughened, the service life of the electrode is extended and stable operation can be performed even during frequent arc starts.

Improved arc start performance ideal for tack welding

Improved arc start performance ideal for tack welding

The adoption of arc starts without using high frequencies has improved the arc start performance. Instantaneous starts are possible even when performing repetitive operations, such as for tack welding or when using an extension cable, making it ideal for welding in plant construction.

Versatile waveform control that can be selected according to the application

Versatile waveform control that can be selected according to the application

Equipped with various welding waveforms for middle pulse control (effective for thin plate welding) and low pulse control (optimal for medium to thick plate welding) as well as initial current control and other control for uniform welding. Settings can be performed on the front panel.

effective for DC manual welding

Effective even for DC manual welding

This product achieves high-quality welding of mild steel, stainless steel, high-tensile steel, Cr-Mo steel, etc., and can increase the efficiency of additional welding of the second and subsequent layers after TIG welding.

Effective check and protection functions

Effective check and protection functions

This product is equipped with an error indicator, power switch with a no-fuse breaker, electric shock prevention function, and connection terminals for various jigs.

Compact and lightweight

Compact and lightweight case structure

This product has achieved a 7 kg lighter body than conventional machines. A case structure has been adopted for the ease of transportation and storage. The units can be stacked vertically up to two tiers for transportation and up to three tiers for storage.

Option List

オプション トーチ TIG用

Welding torch

Torches for TIG welding
● Various types with rated currents from 80 to 300 A
(Standard cables with lengths of 4 m and 8 m are available)

Welding torches

Extension cables for welding torches

オプション ガス調整器

Gas regulator

For argon gas welding

オプションリモコン tig

Remote control unit

* With a 5 m long extension cable


Water-cooling option


Model number YC-300BC2
Rated input voltage and frequency 200 / 220 V ± 10% (common), 50 / 60 Hz (common)
Number of phases Single-phase 3-phase
Rated input kVA(kW) 10.4 (6.5) 14.0 (10.2)
Applicable welding process (DC) TIG (pulse TIG acceptable), arc spot, manual welding
Rated output current DC TIG A 180 DC 300 DC
Manual welding A 180 DC 250 DC
Rated output voltage DC TIG V 17.6 DC 20 DC
Manual welding V 28 DC 30 DC
Rated duty cycle (10-minute cycle) 40
Maximum open circuit voltage V 80 DC
Output current adjustment range Initial current, crater current, pulse current A 4 to 180 4 to 300
Welding current TIG, spot A 4 to 180 4 to 300
Manual welding A 4 to 180 4 to 250
Up-slope time s (seconds) 0 or 0.1 to 5
Down-slope time s (seconds) 0 or 0.2 to 10
Pre-flow time s (seconds) 0 or 0.2 to 10
Post-flow time s (seconds) 2 to 20
Arc spot time s (seconds) 0.2 to 5
Pulse frequency Middle pulse Hz 10 to 500
Low pulse Hz 0.5 to 25
Pulse width 10 to 90
Control method IGBT inverter type
TIG welding starting method DC high-voltage start method
Crater control On, Off, Repeated (Arc stop when Repeated is selected: By pulling up the torch)
Electrical shock prevention (during manual welding) Factory default: ON (23 V)
Cooling method Forced air cooling (exhalation) (with a power saving function during TIG and spot welding)
Insulation type Type H
External dimensions (width x depth x height)*1 mm 288 × 520 × 552
Mass kg 41

*1: The depth dimension does not include the input power supply terminal cover on the rear panel.
● View the required power supply capacity and cable thickness data



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