KEMPPI X5 POWER SOURCE 400

Kemppi X5 Power Source 400 — Industrial Synergic MIG/MAG Power Source with Wise Intelligence

The Kemppi X5 Power Source 400 is an industrial multi-process synergic MIG/MAG power source delivering 400 A at 60% duty cycle and 350 A continuous. Manual and 1-MIG synergic welding with 90% efficiency. Compatible with WiseFusion, WiseSteel, MAX Speed, MAX Cool, and WisePenetration. Cobot-capable. WeldEye ArcVision native. 5-year warranty via MyFleet.

What Is the Kemppi X5 Power Source 400?

The Kemppi X5 Power Source 400 is the entry-level model of the X5 FastMig family and the most efficient power source in the range — delivering 400 A at a 60% duty cycle and 350 A at 100% continuous duty from a 3-phase 380–460 V supply, with a confirmed 90% power efficiency at rated maximum current.

Positioned as the synergic-focused variant of the X5 platform, the X5 Power Source 400 supports Manual MIG/MAG and 1-MIG (synergic) welding — without pulse MIG or Double Pulse capability. This makes it the natural choice for operations running heavy steel fabrication, structural welding, cored wire production, and robotic or cobot welding cells where synergic arc control is sufficient and pulse capability is not required or not justified at the application level.

Crucially, the absence of pulse hardware does not reduce the X5 400's intelligence or digital capability. It carries the full X5 FastMig platform features — native WeldEye ArcVision integration, digital WPS (dWPS) support via an APC wire feeder, cobot compatibility via the Kemppi Cobotics app, and compatibility with WiseFusion, WiseSteel, MAX Speed, MAX Cool, and WisePenetration as purchasable add-on processes.

The X5 Power Source 400 is a power source only — it pairs with the X5 Wire Feeder HD200 AP/APC or X5 Wire Feeder HD300 AP/APC to form a complete X5 FastMig welding system. The APC wire feeder variant is required to access wireless connectivity, dWPS, and WeldEye ArcVision.

A 5-year warranty is available through end-user registration in the Kemppi MyFleet service.

Designed and manufactured in Finland. Compliant with IEC 60974-1 and -10.

Key Features of the Kemppi X5 Power Source 400

400 A Synergic Output — 90% Efficiency, 350 A Continuous

The X5 Power Source 400 delivers 400 A MIG output at 60% duty cycle and sustains 350 A at 100% continuous duty — supporting uninterrupted long-seam, high-deposition, and production welding without thermal interruption. At 90% efficiency at rated maximum current, it is the most energy-efficient model in the X5 FastMig range — a meaningful operating cost advantage in high-utilisation production environments running multiple shifts.

1-MIG Synergic Welding — Automatic Parameter Control

In 1-MIG (synergic) mode, the X5 400 automatically coordinates welding voltage and wire feed speed from a single arc length control input using the selected welding program. This eliminates the need to manually balance two independent variables, reduces setup errors, and delivers consistent, repeatable weld quality across different operators, materials, and joint types. Combined with the X5's intelligent arc platform and optional Wise processes, 1-MIG on the X5 400 is substantially more capable than 1-MIG on the X3 FastMig range.

No Pulse — The Right Choice for Synergic-Only Applications

The X5 Power Source 400 does not support Pulse MIG or Double Pulse MIG welding. This is not a limitation — it is a deliberate positioning decision that makes the X5 400 the correct and more cost-efficient choice for a wide range of high-volume industrial applications:

• Heavy steel fabrication on solid, metal-cored, and flux-cored wires where synergic arc control delivers excellent results without pulse
• Structural and civil steel welding where high deposition rates and consistent arc stability are the priorities
• Cored wire production welding — flux-cored and metal-cored wires typically perform optimally in synergic modes, not pulse
• Robotic and cobot welding cells running synergic programs on carbon steel where pulse is not specified
• Operations upgrading from X3S FastMig who want X5 Wise intelligence and digital connectivity without paying for pulse capability

WiseFusion — Faster Welding, Lower Heat Input (Compatible Add-On)

The X5 400 is compatible with WiseFusion as a purchasable process add-on. WiseFusion produces a narrow, energy-dense arc delivering up to 25% lower heat input and welding speeds up to 25% faster than conventional MIG/MAG — directly improving productivity and reducing distortion on stainless steel, aluminium, and precision fabrication. Note that WiseFusion on a synergic power source operates in 1-MIG mode rather than pulse mode.

WiseSteel — Superior Out-of-Position and High-Speed Steel Welding (Compatible Add-On)

The X5 400 is compatible with WiseSteel as a purchasable add-on. WiseSteel alternates between short arc and spray transfer to handle the challenging globular arc range. It provides adaptive arc stability for out-of-position steel welding and uses micropulsing in spray mode to increase travel speed significantly — making it highly effective for high-speed horizontal fillet welding and overhead structural steel applications on the synergic platform.

WisePenetration — Consistent Arc Penetration (Compatible Add-On)

The X5 400 is compatible with WisePenetration as a purchasable add-on. WisePenetration actively adjusts wire feed speed to maintain consistent arc penetration regardless of electrode stick-out variation, reducing defect risk on fillet and butt welds where stick-out changes during welding.

MAX Speed and MAX Cool — Compatible Arc Process Add-Ons

The X5 400 is compatible with MAX Speed and MAX Cool as purchasable add-ons:

• MAX Speed — increases travel speed on steel and stainless steel in PA/PB flat and horizontal positions
• MAX Cool — delivers reduced heat-input synergic MIG for root pass welding, thin sheet, and gap bridging

Note: MAX Position and MAX Root require pulse welding capability and are not available on the X5 400.

WeldEye ArcVision — Native Industry 4.0 Integration

The X5 FastMig platform includes a native connection to WeldEye welding management software, accessible directly from the welding machine's user interface via an APC wire feeder. X5 FastMig provides a free three-month trial for the WeldEye ArcVision module and Welding Procedures module, including digital WPS functionality. WeldEye ArcVision records welding parameters, arc-on time, and production data in real time — making this data immediately available for quality reporting, productivity analysis, and management review without manual data entry. This native integration is a core X5 platform capability, not a feature limited to higher-tier models.

Digital WPS (dWPS) — Welding Procedure Compliance at the Machine

With an APC wire feeder, the X5 400 supports digital WPS (dWPS) via WeldEye ArcVision — enforcing approved welding procedure specification parameter limits directly at the welding machine and generating a digital compliance record for every weld. This is essential for fabrication to AS/NZS, ISO, EN, and ASME welding standards where WPS adherence must be demonstrable, auditable, and traceable. Available on the synergic X5 400 to the same standard as the higher-tier Pulse models.

Cobot-Capable — Ready for Collaborative Robot Integration

The X5 400 is cobot-capable and integrates with collaborative robots via a digital connectivity module and the Kemppi Cobotics app. For robotic welding applications, TIG and MMA processes are not available — the machine operates in MIG/MAG mode only in robotic configurations. The X5 400's synergic arc performance and Wise process compatibility (WiseFusion, WiseSteel) make it well-suited for cobot-controlled structural steel and production welding cells.

Weld Assist — Guided Parameter Setup

Weld Assist guides welders through application-specific welding procedure and parameter selection — reducing setup time and improving first-pass accuracy across the full program and process library. On the X5 400, Weld Assist supports 1-MIG synergic program selection and any activated Wise process parameters.

5-Year Warranty via MyFleet Registration

A 5-year warranty is available through end-user registration in the Kemppi MyFleet fleet management service. Without MyFleet registration the standard 3-year warranty applies. MyFleet provides service history, maintenance scheduling, and fleet management across multiple X5 units.

Power Source Only — Requires X5 Wire Feeder AP/APC

The X5 400 is a power source only and requires a compatible X5 Wire Feeder HD200 AP/APC or X5 Wire Feeder HD300 AP/APC. The APC wire feeder variant is required to access wireless connectivity, dWPS, WeldEye ArcVision, and the full optional Wise and MAX process library. Note that X3 FastMig wire feeders are not compatible with the X5 power source.

Who Is the Kemppi X5 Power Source 400 For?

The X5 Power Source 400 is designed for:

• Heavy structural steel and civil fabricators running high-deposition synergic MIG on solid, metal-cored, and flux-cored wires where pulse is not required
• Operations upgrading from the X3S FastMig to the X5 platform for Wise intelligence, WeldEye ArcVision, and dWPS capability — without the cost of pulse hardware
• Robotic and cobot welding cell integrators running synergic MIG programs on carbon steel where pulse is not specified in the welding procedure
• Quality-certified fabrication workshops requiring dWPS compliance, digital welding data, and WPS enforcement on synergic processes to AS/NZS, ISO, EN, or ASME standards
• High-efficiency production environments where the 90% power efficiency of the X5 400 — the highest in the X5 range — delivers meaningful operating cost savings across extended multi-shift operations
• Production managers who need real-time welding parameter data, arc-on time records, and WPS compliance reporting via WeldEye ArcVision on synergic welding operations

Kemppi X5 Power Source 400 — Technical Specifications

X5 400 — Pre-Installed vs Compatible Processes

No processes are pre-installed on the base X5 400 model. All compatible processes require separate purchase. For a pre-configured model including WiseSteel, WiseFusion, and 33 synergic programs, see the X5 Power Source 400 WP.

X5 400 vs X5 400 Pulse WP vs X5 400 Pulse+ WP — Choosing the Right X5 Model

Frequently Asked Questions — Kemppi X5 Power Source 400

What is the difference between the X5 Power Source 400 and the X5 Power Source 400 Pulse? The X5 Power Source 400 supports 1-MIG synergic and Manual MIG/MAG welding only — it does not include Pulse MIG or Double Pulse capability. The X5 Power Source 400 Pulse adds Pulse MIG and Double Pulse (DPulse) MIG welding, enabling advanced pulse arc control for aluminium, stainless steel, and thin sheet. The 400 non-pulse model achieves 90% efficiency (vs 89% for the Pulse model) and weighs slightly less at 39 kg (vs 39.5 kg). If pulse MIG is not required for the intended applications, the X5 400 is the more efficient and more cost-effective choice.

Does the X5 Power Source 400 support WiseFusion? Yes — WiseFusion is compatible with the X5 400 as a purchasable add-on. On a synergic power source, WiseFusion operates in 1-MIG synergic mode, delivering its narrow energy-dense arc and reduced heat input benefits without requiring pulse hardware.

What welding processes does the X5 Power Source 400 support? The X5 400 supports 1-MIG (synergic) MIG/MAG, Manual MIG/MAG, DC TIG, MMA (stick), and carbon arc gouging. Pulse MIG and Double Pulse MIG are not available on this model. TIG and MMA are not available in robotic welding configurations.

Is the X5 Power Source 400 suitable for robotic or cobot welding? Yes. The X5 400 is cobot-capable and integrates with collaborative robots via a digital connectivity module and the Kemppi Cobotics app. In robotic configurations, the machine operates in MIG/MAG mode only (TIG and MMA not available). Its synergic arc performance and Wise process compatibility make it a strong choice for cobot welding cells running high-deposition synergic programs on carbon steel.

What is the efficiency of the X5 Power Source 400? The X5 Power Source 400 achieves 90% efficiency at rated maximum current — the highest efficiency rating in the X5 FastMig range. This is a meaningful operating cost advantage in production environments running extended shifts at high output.

Is the X5 Power Source 400 a complete welding system? No. It is a power source only and requires a compatible X5 Wire Feeder HD200 AP/APC or X5 Wire Feeder HD300 AP/APC to form a complete X5 FastMig welding system. For dWPS, WeldEye ArcVision, and wireless connectivity, the APC wire feeder variant is required. Note that X3 FastMig wire feeders are not compatible with X5 power sources.

What is the difference between the X5 Power Source 400 and the X5 Power Source 400 WP? Both models have identical hardware and process compatibility. The 400 WP includes WiseSteel, WiseFusion, and the X5 Work Pack 1-MIG (33 synergic programs) pre-installed — providing immediate out-of-the-box capability across all common filler materials without additional purchases. The base 400 model has no pre-installed processes or programs; all must be purchased separately. If immediate production capability across multiple materials with Wise processes is the priority, the 400 WP is the recommended choice.

What is the 5-year warranty on the X5 Power Source 400? A 5-year warranty is available by registering the product in the Kemppi MyFleet end-user service. Without MyFleet registration, the standard 3-year warranty applies. MyFleet also provides fleet management, maintenance scheduling, and service history tracking for X5 units.

Can the X5 Power Source 400 be upgraded to pulse MIG later? No. The X5 400 is synergic-only hardware — Pulse MIG and Double Pulse capability cannot be added via software upgrade. To access pulse MIG welding within the X5 platform, the X5 Power Source 400 Pulse, 400 Pulse+, or higher-tier models are required. Purchasable add-ons such as WiseFusion and WiseSteel are fully upgradeable via software on the X5 400.