Max 403/403S

Brand Name: STEL

Model: Max 403/403S

Origin: Italy


• The various Multi-Process combinations of this robust “Globetrotter” with its advanced Inverter Technology, increases the level of operator safety to a wide range of welding applications. With easy simple external switching and connections, “optional Add-On Process” fearture are: MIG/MAG; PULSE MIG/MAG; FLUX CORE;DC TIG with HF ignition; CC/CV.

• The MAX 403 Multi-Process/Multi-Function Inverter is available in the following versions: MAX 403 and MAX 403S

• Owing to the advanced Autosensing Technology, the MAX 403s is ready to operate from any external input power supply. This highly sophisticated device automatically links the Primary Voltage supplied from 200V up to 600V, without manually linking Primary Voltage terminals. No switching or internal/external link-up is required by the operator.

• The PFC technology of the MAX 403s version, requires less electrical input to the Inverter power source by utilizing the total current available from the input supply. This results in more than 30% savings from avoiding any energy loss. The unique PFC flexibility further increases the many advantages to the operator such as, providing opportunity to use welding cables up to 500m long,..generator friendly,..VRD.

Max 403 Part No:600243000L
Max 403S Part No:601285000L


Materials: Welding Process: Environments: Main features
• Mild Steels
• Stainless Steels
• Castings
• Aluminium and Alloys
• Copper and Alloys
• Nickel Steels and Alloys
• Electrode Welding
• Cellulosic Electrode Welding
• Tig HF Start Welding
• Mig/Mag Welding
• Mig/Mag Pulse Welding
• Medium-Heavy Fabrications
• Heavy carpentry
• Ship-Building
• Petro-chemical
• Nuclear Plant
• Military plant
• Mining
• Multiprocess
• Digital Display
• Arc-Force & Inductance Adjustable


Technical Data: Max 403 Max 403 PFC AS
Main Voltage 400 V 200 V —> 600 V
 400 V
Phase 3  3
Frequency 50/60 Hz  50/60 Hz
Real Current (35%) 17 A *
Real Power (35%) 11,2 KVA *
Power Factor 0,8  0,98
No Load Voltage 70 V  70 V
Current Range 4-400 A  4-400 A
Welding Current 45% (25°C) 400 A 400 A
Welding Current 60% (25°C) 370 A 370 A
Welding Current 100% (25°C) 320 A 320 A
Welding Current 35% (40°C) 400 A 400 A
Welding Current 60% (40°C) 350 A  350 A
Welding Current 100% (40°C) 300 A  300 A
Mechanical Data:
Earth Clamp - Cable/E.Holder 70 mm² 70 mm²
Degree Protection IP 23 IP 23
Insulation Class H H
Work Temperature 40°C 40°C
Length/Width/Height (mm) 460x250x600 460x250x600
Weight 30 Kg 35 Kg
The date are determinated at an environment temperature of 40°C


MIG Features TIG Features Main Accesories
LCD Display
Burn-Back Adjustable
MIG 2t/4t
MIG Spot
99 Slot for Saving your Parameter
Pulse and Double Pulse
Pre/Post Gas Adjustable
Arc Force Adjustable
Slope Down Adjustable
Inductance Adjustable
Electrode Mode
Speed Pulse
Lift / HF Ignition
TIG Spot
TIG 2t/4t
60 Slot for Saving your Parameter
Pre/Post Gas Adjustable
Slope UP/Down Adjustable
Digital Display
403 is suitable with any Suit Case 

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