Miller Dynasty 400 DX AC/DC TIG Power Source

Stock Code: WM.2520

Lead time 2-3 days
£7,855.20 inc VAT £6,546.00 ex VAT Per Item

Latest technology - powerful, compact AC/DC inverter delivers superior arc performance with total AC arc-shaping capabilities. Auto-Line™ allows connection to any voltage or frequency in the world while using half the power of a conventional machine.

Auto-Line™ power management technology

Allows for any input voltage hookup (380–575 V) with no manual linking, providing convenience in any job setting. Ideal solution for dirty or unreliable power.

Meter calibration

Allows digital meters to be calibrated for certification.

Cooler Power Supply (CPS)

Is an integrated 120-volt dedicated-use receptacle for the Coolmate™ 3.5.

Wind Tunnel Technology™

Protects internal electrical components from airborne contaminants, extending the product life.


Power source cooling system operates only when needed, reducing noise, energy use and the amount of contaminants pulled though the machine.


Provides AC or DC arc initiation without the use of high frequency.

Blue Lightning™

High-frequency (HF) arc starter for non-contact arc initiation. Provides more consistent arc starts and greater reliability compared to traditional HF arc starters.

Program memory

Features nine independent program memories that maintain/save your parameters.


Adjusts the length of postflow time based on the amperage setting, shielding your tungsten and eliminating the need to set the postflow time.

AC/DC Stick Features

DIG control allows the arc characteristics to be changed for specific applications and electrodes. Lower the DIG setting for smooth running electrodes like E7018 and increase the DIG setting for stiffer, more penetrating electrodes like E6010. Hot Start™ adaptive control provides positive arc starts without sticking. AC frequency control adds additional stability when stick welding in AC for smoother welds.

AC TIG Features

Independent amplitude/amperage control allows EP and EN amperages to be set independently to precisely control heat input to the work and electrode.

Balance control provides adjustable oxide removal which is essential for creating the highest quality aluminum welds. These models provide extended ranges.

Frequency controls the width of the arc cone and can improve directional control of the arc.

DC TIG Features

Exceptionally smooth and precise arc for welding exotic materials.

Pulse. Pulsing can increase puddle agitation, arc stability and travel speeds while reducing heat input and distortion. These models provide extended ranges.



Pulsed TIG (GTAW-P)

Stick (SMAW)

Air carbon arc (CAC-A)

400: 6 mm maximum

Technical Data

Miller part number 907717002
Industries Interests Precision fabrication
Heavy fabrication
Pipe and tube fabrication
Aluminum ship repair
Anodized aluminum fabrication
Weldable Metals Steel
Special Alloys
Material Thickness Thin to thick materia
Input Voltage 380–575 V
Input Phase 3-phase power
Input Hz 50 Hz
Amperage Range 3–400 A
Current Type AC/DC
Rated Output 300 A at 32 V, 60% duty cycle
Max Open Circuit Voltage 75 VDC
Weld Output CC
Net Width 349 mm (13.75 in.)
Net Height 629 mm (24.75 in.)
Net Length 559 mm (22 in.)
Net Weight 61 kg (134 lb.)
Warranty 3 Years
Miller’s True Blue Warranty

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© 2024 AES Industrial Supplies Limited

Company Registration: 07988136 Registered Office: Olympic House, Collett, Southmead Park, Didcot, Oxfordshire, United Kingdom, OX11 7WB


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