Max 503

Brand Name: STEL

Model: Max 503

Origin: Italy


Maximum Reliability

• The Inverter Welding Power Source MAX 503, has been designed for Electrode Welding, Mig and Mig Pulse Welding, Tig Lift. Its principal characteristics are: Robust, portable and reliability, welding of most electrode types including Aluminium, Cellulosic and Arc Force Adjustable, Remote Control, Tig Lift, Slope Down Adjustable, Hot Start Adjustable, VRD.

Slope Down variable (0-10 sec.), Smooth descent for a perfect Craterfill.
Arc Force variable (0-500%) a continuous arc for perfect fusion and penetration, no arc snuffing.
Hot Start variable (0-50%) for a precise arc ignition, eliminating electrode sticking.
Digital Amp/Volt Display
Tig Lift with ramp-down time (0-10sec.)
VRD Safety System
MMA electrode Pulsing (only with Remote Control RCCS)

• Rubust and reliable ideal for site work in the construction industries.


  Part No:600243000L


Materials: Welding Process: Environments: Main features
● Mild Steel
● Stainless Steel
● Castings
● Aluminium and alloys
● Electrode Welding
● Cellulosic Electrode Welding
● TIG Lift Start Welding
● Medium-Heavy Fabrications
● Special Maintenance
● Petro-chemical
● Ship-Building
● Installers
● Workshops

● Multiprocess
● Digital Display
● Remote Control
● Arc-Force Adjustable
● Tig DC Lift Start
● Hot Start Adjustable
● Slope Down Adjustable


Technical Data:
Main Voltage 400/500 V
Phase 3
Frequency 50-60 Hz
Nominal Current (40%) 17 A
Nominal Power (40%) 11,2 KVA
No Load Voltage 70 V
Power Factor 0,85
Current range 4 - 220 A
Welding Current Duty Cycle 40% (25°C) -
Welding Current Duty Cycle 45% (25°C) 500 A
Welding Current Duty Cycle 100% (25°C) 400 A
Welding Current Duty Cycle 35% (40°C) -
Welding Current Duty Cycle 40% (40°C) 500 A
Welding Current Duty Cycle 60% (40°C) 440 A
Welding Current Duty Cycle 100% (40°C) 380 A
Mechanical Data:
Earth Cable - Electrode Holder Cable 70 mm²
Degree of Protection IP 23
Insulation Class H
Working Temperature 40°C
Length/Width/Height (mm) 610x300x530 mm
Weight 50 Kg
The date are determinated at an environment temperature of 40°C


Main Accessories:
Tig Torch 26V
Tig Torch with valve
- Tig Torch 26V 4m Air
- Tig Torch 26V 8m Air
Remote Control with Pulse MODE


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