Click on the Accessory Packages tab to see what items are included in each package.
S400 F40 – The Industrial Production Monster Has Arrived
The S400 F40 isn’t just another welder. It’s the world’s most advanced MIG and PULSE MIG welding machine — a true beast built for serious fabricators who demand maximum power, precision, and reproducibility on the shop floor.
This inverter-powered industrial monster delivers **400 amps on 3-phase power** and a rock-solid **300 amps on single-phase**, giving you the muscle to tackle everything from thin aluminum to heavy structural work without breaking a sweat.
Here’s what makes the S400 F40 stand apart:
- Full multi-process capability: MIG, PULSE MIG, DC TIG, Stick, and Carbon Arc Gouging
- Advanced real-time resistance measurement technology that delivers perfect welds every single time
- Synergic programs for Steel, Stainless, Aluminum, and Brazing — plus dedicated Pipe Root programs
- Revolutionary Pulse and I-Cold Pulse™ programs for superior arc control and a beautiful bead appearance
- Seamless interfacing with robotic welding systems
- Exportable settings and parameters — send them to your dealer for deep analysis or optimization
- Clone function — own multiple S400 + F40 units? Make every machine identical in seconds
- Available in air-cooled or water-cooled packages
- Full compatibility with the advanced F40 4-roll wire feeders
Whether you’re running production, building trailers, welding aluminum, or chasing code-quality pipe roots, the S400 F40 gives you the technology, power, and repeatability that tomorrow’s shops demand — available right now.
**The future is here.**
Weld like you mean it.
Ready to step up your game? The S400 F40 is waiting. 🔥⚡
IMPORTANT INFORMATION REGARDING TRUCK FREIGHT SHIPMENTS
The S400 SHIPS to any business/commercial address with access to a forklift in the Contiguous United States (i.e., the lower 48) for a flat fee of $250. If you choose to ship the machine to your residence, accessorial fees will apply (a residential delivery fee, a lift-gate service fee, and possibly a limited access fee). Accessorial fees vary by ship to location and by freight carrier. 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 machine to your nearest freight terminal, where the carrier will hold your machine for you to pick-up. **Please note that if you have indicated that you do not need lift gate at time of delivery and the carrier drops the lift gate, you will be contacted to pay the additional charge for this service. **
Also, 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.
IMPORTANT INFORMATION REGARDING TRUCK FREIGHT SHIPMENTS AND LOST OR DAMAGED GOODS
KEEP ALL SHIPPING CARTONS AND PACKAGING MATERIALS!
Your truck freight shipment leaves our facility and is accepted by the freight carrier in good condition. The material becomes your property when signed for by the freight carrier. Our responsibility for the shipment ceases when signed for and removed from our facility by the freight carrier.
Inspect your shipment thoroughly as soon as received. If possible, unpack the shipment in the presence of the driver. If this is a "HOLD ON DOCK FOR PICK-UP" shipment, inspect the shipment prior to leaving the freight terminal. If you do not inspect the shipment for loss or damage prior to signing for and leaving the freight terminal with the shipment, then the freight carrier will claim that you damaged the shipment bringing it home. If you notice loss or damage, then you must note this on the freight bill.
We are willing to assist you in every possible manner in the collections of claims for loss or damage, but this willingness does not make us responsible for such collection of claims or replacement of materials.
| Input Voltage | Single Phase: 230V (208 to 240V) 3-Phase: 200 to 575V |
| Input Amperage (@ Max Output) | Single Phase: 51A 3-Phase, 240V: 31A 3-Phase, 480V: 15A |
| Maximum Output Amperage | MIG: 320A TIG & Stick: 300A |
| Minimum Output Amperage | MIG: 12A TIG & Stick: 4A |
| Maximum Recommended Thickness *Single pass capacity varies depending on the material being welded and the settings of the machine. |
Up to 5/8" |
| Duty-Cycle | 40% @ 300A (77º F) 100% @ 220A (77º F) 35% @ 300A (104º F) 60% @ 250A (104º F) 100% @ 200A (104º F |
| Arc Voltage | 13-35V (MIG +/-8) |
| Open Circuit Voltage | 79V |
| Electronic Overload Protection | Yes |
| Cooling (On-demand, electric fan, variable speed) | Dual Fan (Forced Air) |
| Wire Spool Capability *Up to a 44 Lb. weight capacity. |
8" and 12" |
| Wire Diameter *Depends on the material being welded (not all wire can be welded in all sizes). |
.023" to .045" |
| Frequency | 50/60 Hz |
| Wire Feed Rate (In./Min.) | 55 to 787 IPM |
| Dimensions (Length x Width x Height) | 26-3/4" x 12" x 17-1/4" |
| Weight *Without wire and cables. |
95 Lbs. |
Downloads/Manuals
The HTP S400 is available in three packages:
Here are the details of each package:
S400 Air Cooled Steel Package ($9,999)
S400 Power Source
S400 Wire Feeder
S400 Control Cable for wire feeder FC 5M Air 70mm 2x
S400 welding cart
15' Air Cooled Steel gun
Steel drive rollers- 1.0/1.2 steel drive roller installed in the machine for .035, .040 &.045 steel wire
15' ground cable
Gas hose and Harris Regulator
PVC spacer for spindle
User’s Manual
S400 Water Cooled Steel Package ($12,999)
S400 Power Source
S400 Water Cooler
1 gallon of coolant
S400 Wire Feeder
S400 control cable for wire Feeder FC 5m + H2O 70 mm 2x
S400 Welding Cart
15' Water cooled Liberty Steel gun 501150-IT
Steel drive rollers- 1.0/1.2 steel drive roller installed in the machine for .035, .040 &.045 steel wire
15' ground cable
Gas hose and Harris Regulator
PVC spacer for spindle
User’s Manual
S400-PS S400 Power Source only ($5,999)
S400 Power Source only
2-1/4BSP to 5/8-18RH Adapters for the gas connections
User’s Manual
Cart is not included
These package deals allow you to choose the option that best suits your needs. If you require any customization or additional options, you can call in and provide the details to get a tailored package.
Warning: Welding and cutting equipment, accessories, and fumes can expose you to chemicals, including Chromium (Hexavalent Compounds), Lead, and Nickel, which are known to the State of California to cause cancer and/or birth defects or other reproductive harm.
For more information, please visit www.P65Warnings.ca.gov.Rates from 0% APR or 10-36% APR. Payment options through Shop Pay Installments are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required. State notices to consumers affirm.com/licenses.
Owner’s Manual