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- Kemppi X5 FastMig 500A Pulse Water-Cooled MIG Welder With GXE405W Torch
Kemppi X5 FastMig 500A Pulse Water‑Cooled MIG Welder With GXE405W Torch
The Kemppi X5 FastMig 500A Pulse is a professional‑grade water‑cooled MIG/MAG welding system engineered for demanding industrial applications requiring high performance, precision, and reliability. Designed to deliver advanced pulse welding capabilities, this robust welder provides exceptional control and arc stability across a wide range of materials and thicknesses, making it ideal for fabrication, structural welding, and production environments.
With a powerful 500 A output and water‑cooled design, the FastMig 500A Pulse ensures excellent thermal management and extended duty cycles — even under heavy usage. The included GXE405W water‑cooled MIG torch offers enhanced operator comfort and superior cooling performance, enabling longer weld runs with reduced heat‑related strain on consumables and cables.
Equipped with pulse welding technology, this system allows for refined control over penetration, bead shape, and spatter reduction, providing welders with clean, high‑quality results on challenging joints and materials. The intuitive control interface simplifies parameter selection, while the rugged construction ensures durability and longevity in tough workshop conditions.
Whether tackling precision fabrication or high‑volume production work, the Kemppi X5 FastMig 500A Pulse welder delivers consistent, premium‑grade performance you can rely on.
Key Features:
- 500 A water‑cooled MIG/MAG welding system
- Manual, synergic, pulse, and double pulse welding options are available
- Includes GXE405W water‑cooled MIG torch for enhanced thermal performance
- Excellent duty cycle and heat management for extended welding runs
- Ideal for fabrication, structural welding, and industrial applications
- Compatible with all MAX welding processes as well as WiseFusion, WisePenetration, and WiseSteel welding processes
- A 5-year warranty is available through end-user registration in the MyFleet service.
- Built to last
- Easy to operate and fast to adapt.
- 5.7" TFT screen panel
- Weld Assist
- Energy Efficient Cooling
- Native connection to WeldEye welding management software
- Fully customisable screen
- Easy changing of wire spools
- 30% less spatter in steel welding
- Intelligent narrow gap welding
A high‑performance, versatile MIG welding solution built for professionals demanding consistent quality and power.
Kit Includes
- X5 FastMIG 500 A water‑cooled MIG/MAG welding system
- GXE405W water‑cooled MIG torch
- X5 Wire Feeder 300
- X5 Water Cooler

5 Year Warranty
Kemppi are so confident in the quality of their X5 welding machines that they have extended the warranty to five years. To validate the warranty, simply register your machine within two months of purchase.
5 Year Warranty
Kemppi are so confident in the quality of their X5 welding machines that they have extended the warranty to five years. To validate the warranty, simply register your machine within two months of purchase.
More Control on Weld Pool
MAX position helps manage gravitational effects on a molten weld pool. MAX position improves control and confidence when working in the position, and is excellent when filling and capping in steel, stainless steel, and aluminium applications in the PF position.
More Control on Weld Pool
MAX position helps manage gravitational effects on a molten weld pool. MAX position improves control and confidence when working in the position, and is excellent when filling and capping in steel, stainless steel, and aluminium applications in the PF position.


Over 30% Lower Heat Input
MAX Cool lowers heat input by up to 32%, improving control where excessive temperatures negatively impact weld pool stability and increase joint distortion. MAX Cool is the ideal solution for a variety of applications, including thin sheet fabrication, root welding, gap bridging, and joining thin extruded sections in solid Fe, Ss, CuAI8, and CuSi3 filler materials.
Over 30% Lower Heat Input
MAX Cool lowers heat input by up to 32%, improving control where excessive temperatures negatively impact weld pool stability and increase joint distortion. MAX Cool is the ideal solution for a variety of applications, including thin sheet fabrication, root welding, gap bridging, and joining thin extruded sections in solid Fe, Ss, CuAI8, and CuSi3 filler materials.
25% Faster Welding
WiseFusion produces a very narrow and energy-dense arc that allows welding at a significantly higher speed without the risk of undercut. WiseFusion is up to 25% faster than conventional synergic 1-MIG and pulsed MIG, and it also facilitates weld pool control in position welding. Adaptive arc length regulation eliminates the need for constant parameter adjustment.
25% Faster Welding
WiseFusion produces a very narrow and energy-dense arc that allows welding at a significantly higher speed without the risk of undercut. WiseFusion is up to 25% faster than conventional synergic 1-MIG and pulsed MIG, and it also facilitates weld pool control in position welding. Adaptive arc length regulation eliminates the need for constant parameter adjustment.

| Mains connection voltage 3~ 50/ 60 Hz | 380...460 V ±10 % |
|---|---|
| Mains connection cable type | H07RN-F |
| Mains connection cable size | 6 mm² |
| Fuse | 32 A |
| Output at +40°C - 60% | 500 A |
| Output at +40°C - 100% | 400 A |
| Operating temperature range | -20 ... 40 °C |
| Storage temperature range | -40 ... 60 °C |
| Degree of protection | IP23S |
| External dimensions LxWxH | 750 mm x 263 mm x 456 mm |
| Weight without accessories | 39.5 kg |
| Recommended generator power (min) | 35 kVA |
| Standards | IEC 60974-1, -10 |
| Maximum supply current [I1max] | 39 ... 34 A |
| Effective supply current [I1eff] | 30 ... 27 A |
| Rated maximum input power [S1max] | 27 kVA |
| Idle state power consumption [P1idle] | 31 W |
| No-load state power consumption (MMA), power save | 32 W |
| No-load state power consumption (MMA), fans ON | 240 W |
| No-load voltage [U0] | 76 ... 94 V |
| Open circuit voltage [Uav] | 76 ... 94 V |
| Output range, MIG | 15 A / 10 V ... 500 A / 50 V |
| Output range, TIG | 15 A / 1 V ... 500 A / 50 V |
| Output range, MMA | 15 A / 10 V ... 500 A / 50 V |
| Voltage adjustment range, MIG | 8 ... 50 V |
| Power factor at rated maximum current [λ] | 0.89 |
| Efficiency at rated maximum current [η] | 89 % |
| EMC class | A |
| Minimum short-circuit power of supply network [Ssc] | 6.7 MVA |
| Voltage supply for auxiliary devices | 12 V, 48 V |
| Voltage supply for cooling unit | 24 V, 380...460 V |
| Wired communication type | CAN bus |
| Supply voltage | 380...460 V ±10 % |
|---|---|
| Idle state power consumption [P1idle] | 3 W |
| Cooling power at 1 I/min | 1.1 kW |
| Recommended coolant | Kemppi MGP 4456 |
| Tank volume | 3 l |
| Operating temperature range with recommended coolant | -10 ... 40 °C |
| Storage temperature range | -40 ... 60 °C |
| EMC class | A |
| Degree of protection (when mounted) | IP23S |
| External dimensions LxWxH | 730 mm x 263 mm x 288 mm |
| Weight without accessories | 14.3 kg |
| Standards | IEC 60974-2, -10 |
| Maximum coolant pressure | 4 Bar |
| Welding connection type | Euro |
|---|---|
| Type of cooling | Liquid |
| Minimum coolant flow rate | 1 l/min |
| Minimum cooling power at 1 l/min | 0.9 kW |
| Contact tip | M10x1 |
| Method of guidance | Manual |
| Load capacity 100% / Ar + 18% CO₂ | 400 A |
| Load capacity test, filler wire material | Fe |
| Load capacity test, filler wire diameter | 1.6 mm |
| Load capacity test, stick out length | 22 mm |
| Load capacity test, gas flow | 20 l/min |
| Gun handle | Yes |
| Neck type | Standard |
| Neck dimensions: length | 144 mm |
| Neck dimensions: height | 99 mm |
| Neck dimensions: angle | 48 ° |
| Welding torch cable length | 5 m |
| Remote control | Optional |
| Standards | IEC 60974-7 |
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