Description
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TELWIN MASTERMIG 405i 230V/400V: Synergistic Power and Precision Welding for Professionals! ??
Meet the TELWIN MASTERMIG 405i, a revolutionary microprocessor-controlled inverter MIG/MAG welder that redefines the standards of performance and versatility in professional welding. Designed for the most demanding industrial and shop applications, this machine is the answer to the need for a reliable, precise and flexible tool that meets every challenge. Whether you’re working with heavy steel structures, precision stainless steel parts or delicate aluminum details, the MASTERMIG 405i delivers unparalleled weld quality and comfort.
Imagine a welder that intelligently adjusts welding parameters, minimizing setup time and eliminating the risk of errors. Thanks to the advanced Wave OS operating system, the MASTERMIG 405i offers intuitive operation and access to a wide range of synergistic welding programs, optimized for different materials and shielding gases. This not only saves time, but more importantly guarantees the repeatability and highest quality of each joint. In addition, its unique ability to operate on both three-phase 400V and single-phase 230V power (with adequate power) makes it an extremely mobile and versatile solution, ready to work in any conditions – from the production floor to field assembly work.
Investing in the TELWIN MASTERMIG 405i is a step towards the future of your workshop. This welder is not only a powerful tool, but a partner that understands your needs. Advanced technologies, such as ATC (Advanced Thermal Control) for welding thin sheet metal without distortion, or the ability to select pulse modes (if available in this Wave OS configuration), open up new possibilities for you to complete complex projects. Robust construction, a 4-roll wire feeder for stable feeding even with long handles, and a high duty cycle are your assurance that the MASTERMIG 405i will stand up to even the longest and most intense welding sessions.
Forget about compromises. The TELWIN MASTERMIG 405i combines Italian engineering, innovative technology and the reliability you expect from premium equipment. It’s the ideal tool for professionals who value precision, productivity and the ability to customize the welding process to meet specific material and application requirements. Improve the quality of your work, optimize your processes and gain a competitive edge with the MASTERMIG 405i. ??️
Explore the Advanced Capabilities of TELWIN MASTERMIG 405i 230V/400V
Detailed information
At the heart of the TELWIN MASTERMIG 405i welder is the revolutionary Wave OS operating system, which takes user interaction with the machine to a whole new level. With its color TFT display and intuitive interface, navigating through advanced functions becomes child’s play. A key feature of the Wave OS is the synergy mode, which automatically sets the optimal welding parameters after selecting the type of material, wire diameter and shielding gas. This is an invaluable support for both experienced welders looking to get started quickly and those just honing their skills.
Wave OS offers dozens of ready-made synergy programs for black steel, stainless steel, aluminum, as well as for welding with core wires or soldering galvanized sheets (CuSi3, CuAl8). What’s more, the system allows precise manual adjustment of automatically selected parameters, such as arc dynamics (electronic inductance), wire burning time (burn-back), and wire access speed. This puts the professional in full control of the process, able to adjust the arc characteristics to the specific requirements of the application, ensuring perfect fusion and weld face shape.
Detailed information
The TELWIN MASTERMIG 405i is synonymous with versatility, and its ability to operate on two different supply voltages is proof of that. The unit is designed to automatically recognize the type of power supply connected – three-phase 400V or single-phase 230V. With a 400V power supply, the welder unleashes its full potential, delivering a welding current of up to 400A, which is essential for welding thick steel structures and intensive industrial applications.
But the real magic happens when you need to work in a location where only a standard 230V outlet is available. The MASTERMIG 405i, thanks to its advanced inverter technology, is also able to work efficiently at this voltage, offering enough welding current for most workshop, repair or assembly work (e.g., up to about 270A, depending on the installation). This remarkable flexibility eliminates the need for several welders or heavy transformers, making the MASTERMIG 405i an ideal solution for companies providing services in different locations and for workshops with diverse power infrastructures. It’s an investment that adapts to your needs, not the other way around.
Detailed information
The MASTERMIG 405i doesn’t just deliver the power, but also the intelligence needed to put it to precise use. One of the key technologies is ATC (Advanced Thermal Control). This innovative system, developed by Telwin, is particularly valuable for welding thin sheet metal, where excessive heat can lead to burn-through and deformation. ATC precisely modulates the arc energy, ensuring perfect fusion with minimal heat input. The result is aesthetically pleasing, durable welds without unwanted material distortion.
In addition to ATC, the Wave OS system on the MASTERMIG 405i offers advanced adjustment of arc characteristics. The user can adjust the arc dynamics (electronic inductance) for a softer or harder arc, depending on the material being welded, position and preference. Functions such as adjustable current rise and fall times (Slope-Up, Slope-Down), crater filling, and 2T/4T/Bi-Level are also available. For aluminum welding, specialized synergy curves and the ability to precisely set start and end parameters can be crucial, minimizing the risk of welding defects. This deep control over every aspect of the welding process allows professionals to achieve top-quality results, even in the most demanding applications.
Detailed information
The TELWIN MASTERMIG 405i is built for hard work. Its robust design, high-quality components and efficient cooling system guarantee reliability even in harsh industrial environments. A high duty cycle of up to 30% at a maximum current of 400A (at 40°C, 400V power supply) means the welder can operate for long periods of time without the risk of overheating, which is crucial for maintaining production continuity and completing large projects.
An extremely important element affecting productivity is the professional 4-roll wire feeder. It not only provides precise and stable feeding of a wide range of welding wires (steel, stainless steel, aluminum, core), but also allows the use of long welding guns (up to 5 meters) without losing the smoothness of feeding. This increases the operator’s working range and comfort, especially when welding large-size structures. In addition, Wave OS can offer monitoring and recording functions for welding parameters (optional), which is invaluable for quality management systems (e.g. ISO 3834, EN 1090) and allows cost optimization by tracking material consumption and working time. The MASTERMIG 405i is an investment in productivity and long-term reliability.
Technical Specifications
| Parameter | Value |
|---|---|
| Full Model Name | TELWIN MASTERMIG 405i 230V/400V |
| Catalog number | 816197 |
| EAN code | 8056590370889 |
| Supply voltage | 3x400V / 1x230V (50/60Hz) |
| Maximum welding current (400V) | 400 A |
| Welding current at 230V (approximate) | Up to 270 A (dependent on mains protection) |
| Duty cycle (400V, EN60974-1, 40°C) | 400 A @ 30% (inference); 300 A @ 60% (inference); 250 A @ 100% (inference) |
| Welding current adjustment range | 20 – 400 A (for 400V) |
| Idle state voltage | approx. 70 V (inference for inverter) |
| Steel wire diameter | 0.6 – 1.6 mm |
| Stainless wire diameter | 0.8 – 1.6 mm |
| Diameter of aluminum wire (Mg/Si) | 0.8 – 1.2 mm (up to 1.6 mm with appropriate tooling) |
| Diameter of the core wire | 0.9 – 1.6 mm |
| Maximum weight of wire spool | 15 kg |
| Number of feeder rolls | 4 |
| Degree of protection | IP23 |
| Technology | Inverter, Microprocessor control, Wave OS operating system |
| Cooling | Fan |
| Insulation class | H |
Key Features and Benefits
- ? Versatile 230V/400V Power Supply: Unique flexibility with the ability to operate on both standard 400V three-phase power, offering full 400A output, and 230V single-phase power (with limited output, ideal for lighter work or in areas without access to 400V). For the professional, this means that the welder can be used in almost any conditions – from large manufacturing plants to smaller workshops or mobile work, without the need for multiple units.
- ? Wave OS with Synergy: The advanced TFT color display and Wave OS provide intuitive operation and access to dozens of synergistic welding programs for different materials (steel, stainless steel, aluminum, CrNi), thicknesses and shielding gases. Simply select the type of material, wire diameter and gas, and the welder automatically selects the optimal parameters. This results in significantly reduced setup time, minimized errors, excellent repeatability and superior weld quality even for less experienced operators, while giving full control to advanced users through manual adjustments.
- ? Powerful Power and High Duty Cycle: A maximum welding current of 400A at 400V and a high duty cycle (e.g., 30% at 400A) make it possible to weld thick materials and complete long-lasting, demanding tasks in heavy industry, steel construction or series production. For the welder, this means reliability, less downtime and the ability to work continuously under intense loads, resulting in higher productivity.
- ⚙️ Professional 4-Roll Wire Feeder: The integrated, high-precision 4-roll wire feeding mechanism guarantees stable and smooth delivery of welding wire, even when using long welding guns (up to 5m) and aluminum or core wires. This translates into a stable arc, fewer spatters, better weld quality and reduced risk of wire jams, which is crucial for continuous and efficient operation.
- ? Advanced Thermal Control (ATC) Technology: An innovative ATC feature developed by Telwin specifically for welding thin materials. This system intelligently controls the linear energy of the arc, preventing overheating and deformation of thin sheets, a common problem in traditional MIG/MAG welding. This makes it possible to achieve excellent welds on thin materials, minimizing distortion and the need for subsequent machining.
- ? Cloud Readiness and Data Tracking (dependent on Wave OS configuration): Selected models with Wave OS can offer connectivity features (e.g., Wi-Fi, LAN) and the ability to record and analyze welding parameters (WPS, material consumption), which is invaluable for quality management (e.g., according to EN 1090) and production process optimization. For companies seeking to digitize and fully control welding production, this is a step toward Industry 4.0.
Product Application
- ? Production of heavy steel structures and machinery
- ?️ Advanced locksmith and welding workshops
- ? Shipbuilding and offshore industry (structural components)
- ? Production and repair of specialized vehicles, trailers, agricultural machinery
- ? Welding of pipelines and tanks (carbon steel, stainless steel)
- ?️ Assembly and construction work on construction sites
- inox✨ Precision welding of stainless steel in the food and chemical industries
- ✈️ Welding of aluminum and its alloys in lightweight structures and automotive applications
Contents of the Kit
- ? TELWIN MASTERMIG 405i 230V/400V welder (816197)
- ?️ Professional MIG/MAG welding chuck (e.g. MT36 or equivalent, length and type may depend on supplier configuration)
- ? Ground wire with clamp
- ? Feed rollers for common steel wire diameters (e.g. 0.8-1.0 mm or 1.0-1.2 mm)
- ? User Manual
- (Note: The exact contents of the kit may vary depending on the distributor and the offer selected. Recommended to check with your dealer.)
Summary: TELWIN MASTERMIG 405i 230V/400V – Your Best Investment.
The TELWIN MASTERMIG 405i is more than a welder – it’s your reliable partner in the pursuit of welding perfection. By combining powerful power, revolutionary Wave OS with intelligent synergy, and the unique flexibility of 230V/400V power supply, you get a tool that will meet any challenge, improving the quality and efficiency of your work. Regardless of the scale of your project or type of material, the MASTERMIG 405i will deliver unparalleled results.
Trust the Italian technological thought and years of experience of the Telwin brand. Choose the MASTERMIG 405i and discover a new dimension of professional welding. Contact us today to learn more and invest in the future of your workshop! ?
Part number: 816197
EAN code: 8056590370889





