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  Home > TIG Welders > Invertig 400 AC/DC >

HTP America® Invertig 400 AC/DC
Invertig 400 AC/DC 12.5' Lead Water-Cooled Package
Cart capable of holding a large, 330 cu. ft. cylinder, but gas cylinder not included in package price.

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The Invertig 400 AC/DC complete water-cooled package includes the following items:

Invertig 400 AC/DC Power Source
Welding Cart
Smart Water-Cooler
12' 18 Series Trim Line Water-Cooled TIG Torch
12' Foot Pedal
Gas Hose
1 Gallon of Coolant
TIG Torch Consumable Kit
15' Ground Cable and Clamp Assembly

*Please note: This is the base package for the Invertig 400. Upgrade options are available. Please contact Customer Service at (847) 357-0700 to discuss your upgrade options.

Item# Item Name Our Price Qty Add
70400WC Invertig 400 AC/DC Complete Water-Cooled Package
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Product Description:

We designed the all new HTP America® Invertig 400 AC/DC for heavy use in industrial settings, specifically for applications such as precision fabrication, motor sports and racing fabrication, heavy fabrication, pipe fabrication, aluminum fabrication, aerospace work and repair, along with work and repair in ship and rail yards. The Invertig 400 runs the following processes: TIG (GTAW), Pulsed TIG (GTAW-P), Stick (SMAW), and Pulsed Stick (SMAW-P). When connected to single phase 208-240V power, the Invertig 400 has the highest output of any welder on a 50 amp circuit — a full 350 amps of raw welding power. Additionally, the versatile Invertig 400 runs on 3-phase power from 208V to 575V, providing the full welding amperage range of 4 to 400 amps. The Invertig 400 features a rated output of 350 amps when run on single phase and a rated output of 400 amps, with a remarkable 100% duty cycle @ 300 amps, when run on 3-phase.

General Features

Automatically adjusts for input voltage: 208-240V on Single Phase and 208-575V on 3-Phase
– Meters can be calibrated for certification
Smart Cooler that only turns on when needed and stops the arc when it detects a low coolant level
The cooling fans blow directly into heat sinks and the circuit boards are protected from grinding dust and moisture by a special lacquer coating that makes the machine IP23
Cooling fans work on demand; the fans only power up when cooling is required, reducing noise and eliminating unwanted grinding dust from being pulled into the machine while the machine is idling
Lift Arc Start gives you the option of TIG arc initiation without high frequency when you work around sensitive electronics where high frequency is unwanted
30 memory programs allow you to save specific welding parameters for 30 different welding jobs

Stick Features

Arc Force (DIG): Helps reduce "sticking" of the electrode
Hot Start: For easy arc strikes
DC and AC Stick Welding: AC frequency and balance can be adjusted in Stick mode as well
Pulse Stick Welding: Makes bridging gaps easier, welds out of position better, and reduces heat input

IG Features

350 amp output on 50 amp Single Phase Circuit
Asymmetric AC allows you to limit Electrode Positive or Electrode Negative amperages separately, which gives you more control over heat input on critical welds
AC Balance: Adjustable from 10 to 90%; allows for precise control of oxide removal vs. penetration
AC Frequency: 20Hz to 400Hz (up to 99 amps); 20Hz to 200Hz (over 100 amps); Helps to reduce or enhance heat input and focus the arc
Three AC Waveforms: Soft Square, Square, and Triangular

The Invertig 400 SHIPS FREE to any business/commercial address with access to a forklift in the Contiguous United States (i.e., the lower 48). If you choose to ship the Invertig 400 to your residence, accessorial fees will apply (a residential delivery fee and a lift-gate service fee). Accessorial fees vary by location and by freight line. You may place your order online, but you will be contacted by Customer Service to arrange and pay for any applicable accessorial fees.To avoid accessorial fees, we can also ship the Invertig 400 to your nearest freight terminal, where they will hold your equipment for you to pick-up.

lso, if your ship to address is in Alaska, Guam, Hawaii, Puerto Rico, or any other U.S. Territory outside of the Contiguous United States, partial shipping charges will apply and accessorial fees may apply. You may still place your order online, but you will be contacted by Customer Service to arrange and pay for partial shipping along with any applicable accessorial fees.

Invertig 400 AC/DC Specifications
Welding Current Single Phase 4 to 350 Amps
Welding Current 3-Phase 4 to 400 Amps
Single Phase Rated Output 35% @ 350 Amps
230V Single Phase Input Amps @ Rated Load 50 Amps
3-Phase Rated Output 30% @ 400 Amps
3-Phase Input Amps @ Rated Load 230V = 36 Amps
400V = 21 Amps
460V = 17.6 Amps
500V = 16.8 Amps
Welding Modes (5) Stick
TIG Spot
TIG Reset
Programmable Memories 30
Asymmetric AC Yes
AC Frequency (Hz) 20 to 400 (Up to 100 Amps)
20 to 200 (Over 100 Amps)
AC Balance (%) 10 to 90
Pre-Flow (Seconds) 0.1 to 5.0
Post-Flow (Seconds) 0.1 to 99.9
Initial Amps (%) 10 to 90
Final Amps (%) 10 to 90
Slope Up (Seconds) 0.1 to 10.0
Slope Down (Seconds) 0.1 to 10.0
Spot Time (Seconds) 0.1 to 10.0
Hot Start (%) 0 to 50
Arc Force (%) 0 to 500
Wave Forms Soft Square
EN Amperage (%) 10 to 99
EP Amperage (%) 10 to 99
Duty Cycle Single Phase TIG 35% @ 350 Amps
60% @ 250 Amps
100% @ 200 Amps
Duty Cycle 3-Phase TIG 30% @ 400 Amps
60% @ 340 Amps
100% @ 300 Amps
Duty Cycle Single Phase Stick 35% @ 260 Amps
60% @ 200 Amps
100% @ 180 Amps
Duty Cycle 3-Phase Stick 35% @ 300 Amps
60% @ 240 Amps
100% @ 200 Amps
Power Source Alone
On Welding Cart

26-1/2” L x 12-1/4” W x 17-1/2” H
38-1/2” L x 20-1/2” W x 41” H
Power Source Alone
Power Source & Cart
Power Source, Cart, & Water-Cooler

117 Lbs.
204 Lbs.
250 Lbs.
Pulse Parameters:
Pulses/Second (PPS) Stick AC & DC
Pulses/Second (PPS) TIG AC
Pulses/Second (PPS) TIG DC
Peak Time (%)
Background Amps (%)

0.4 to 5.0
0.4 to 10.0
0.4 to 999.9
10 to 90
10 to 90

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