MIG Welder GYS Cosmos 400G Synergic Multi-Process MIG/MAG Pulse MMA TIG Three Phase 400A
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- Multi-process welding: MIG/MAG, MMA, TIG and air-arc gouging
- Digital control with 70+ synergies and 5 welding modes for various materials
- Three-phase 400A output with pulsed arc technology and high duty cycle

The Cosmos 400 G is a three-phase MIG/MAG pulse welding power source designed for multi-process welding applications. Featuring digital control, exceptional arc dynamics and a high duty cycle, it supports steel, stainless steel, aluminium, and flux-cored wire welding, alongside MMA and TIG processes.
Features
- Multi-process capability: MIG/MAG, MMA DC/Pulse, TIG DC Lift/Pulse, and air-arc gouging
- Wire compatibility: steel and stainless steel (0.6-1.6 mm), aluminium (0.8-1.6 mm), CuSi and CuAl (0.8-1.6 mm), flux-cored (0.9-2.4 mm)
- 70+ synergies for steel, AlMg, AlSi and CrNi materials
- Five welding modes: Standard, Pulse, ModulArc, Root, and Manual
- Pulsed arc achieves up to 30% higher welding speeds
- Digital arc control with instant ignition and no cratering
- Stores up to 200 welding programs via USB stick
- Traceability of weld beads per EN 3834
- Compatible with WF 36 or WF 51 wire feeders
- RC-HD3 digital remote control compatible
- IP23-rated with on-demand ventilation system
- Two display modes: Easy and Expert
- Generator compatible (30 kW)
| Specification | Value |
|---|---|
| Supply voltage | 400 V three-phase, 50/60 Hz |
| MIG output at 100% duty cycle | 400 A |
| MMA output at 100% duty cycle | 380 A |
| TIG output at 100% duty cycle | 400 A |
| Maximum electrode diameter (MMA) | 6 mm |
| Maximum air-arc gouging diameter | 6.5 mm |
| IP rating | IP23 |
| Dimensions (W x H x D) | 75 x 30 x 49 cm |
| Weight | 37 kg |
| Generator compatibility | 30 kW |
| Maximum interconnection cable length | 20 m |
| Welding Current Range | 15-400A |
| Wire Diameter (Solid Wire) | 0.6-1.6mm |
| Cooling | Air Cooled |
| MIG Duty Cycle | 100% at 400A |
| Brand | GYS |
| Welding Process | Gouging, MIG/MAG, MMA, TIG |
| Applications | Sheet Metal Fabrication (<100A), Light Fabrication (100-160A), General Fabrication (160-210A), Heavy Fabrication (210-300A), Industrial Workshop (300-400A) |
| Amperage (Min) | 15 |
| Amperage (Max) | 400 |
| Power Source | Industrial 3-Phase (400V) |
| Duty Rating | Heavy Duty (60-100%) |
| Portability | Compact / Carry Handle |
| Enclosure Rating | IP23 / IP23S or higher |
| Synergic Control | Yes |
| Power Source Type | Inverter |
| Flux Compatible | Yes |
| Pulse Welding | Pulse |
| Wire Feed Type | Separate Wire Feed |
| Cooling | Air Cooled |
| Max Wire Thickness | 1.6mm Wire |
Technical Data Sheet
Download PDFA carriage charge is applied to orders, for standard 1-2 day shipments to mainland destinations within the United Kingdom. Other destinations and premium services are available but subject to additional freight charges.
MIG Welder GYS Cosmos 400G Synergic Multi-Process MIG/MAG Pulse MMA TIG Three Phase 400A Get in touch
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