Multi Process Welder - 250 A - 400 V - MIG/MAG - WIG - E-Hand - FCAW

Manufacturer: Stamos Selection | Item number: EX10020157 | Model: S-MULTI 250M

Multi Process Welder - 250 A - 400 V - MIG/MAG - WIG - E-Hand - FCAW
Multi Process Welder - 250 A - 400 V - MIG/MAG - WIG - E-Hand - FCAW
Multi Process Welder - 250 A - 400 V - MIG/MAG - WIG - E-Hand - FCAW
Multi Process Welder - 250 A - 400 V - MIG/MAG - WIG - E-Hand - FCAW
Multi Process Welder - 250 A - 400 V - MIG/MAG - WIG - E-Hand - FCAW
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Prices incl. VAT Shipping costs abroad not included*

  • Free shipment to UK


    Available in: 3 weeks

  • 30 days return service


Product Highlights

  • 400 V
  • 250 A / Duty Cycle 60 %
  • Hot Start, Arc Force, Anti-Stick
  • 2-Step / 4-step

The universally applicable and powerful multi process welder with up to 250 A from Stamos Selection


With a welding current of up to 250 A (MIG), the multi process welder S-MULTI 250M has the right welding method for every metal work. Thin sheets or robust steel beams, with or without gas, on the construction site or in the workshop - with the MIG / MAG, WIG, MMA or FCAW welding methods, you can weld metals efficiently and safely.

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At a duty cycle of 60% the welder is powered by up to 250 A for MIG/MAG welding. The power for MIG welding can be regulated down to 194 A and at 200 A you can weld without breaks. For WIG welding and MMA welding, a welding current of 230 A is reached. At a duty cycle of 100% you can weld with 178 A.

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The easily readable control panel with 2 LED displays gives you maximum control over the welding parameters and is also easy to operate with welding gloves. You can seamlessly adjust the current and voltage (MIG), determine the inductivity, switch between a 2-step or 4-step operation, regulate the gas delay time and the current increase and decrease and choose the welding method.

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  • Effortless change between MIG / MAG, TIG, E-Hand, FCAW welding processes
  • Versatile for metalwork on construction sites or in the workshop
  • Clear control panel with 2 LED displays
  • Easy switch between 2-step and 4-step operation
  • Suitable for a wide variety of metals, depending on the welding method
  • Supply of welding wire via the standard feed with four wire rolls or a spool gun directly at the burner
  • Wire feed speed adjustable on the device

The welder has an undercarriage, which makes it particularly easy to transport. Two handles allow you to pull the device easily on its sturdy rubber wheels to its destination. There is enough space for a gas cylinder above the large rear wheels. It is secured with a bracket and two chains.

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MIG / MAG - fast, effective and universally applicable


For MIG / MAG welding, the welding seam is protected with gas. The MIG uses inert gases and the MAG uses active gases. It is characterized by high welding quality, efficiency and welding speed. It is universally applicable, well suited for welding steel structures as well as for smaller welding jobs.

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For MIG / MAG welding, the inductivity is adjusted between wide and narrow via a switch. The exact value can then be set on a rotary control. This smooths the welding current and significantly improves the welding quality. For MIG welding, you can use a spool gun (not included in delivery), where the cored wire is fed directly to the torch.

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WIG - metal welding with a narrow welding zone and little reworking


WIG welding with the S-MULTI 250M uses the high-frequency ignition to activate the arc. It is suitable for most metals and can be used from a metal thickness of 0.5 mm. The burner welds with little sparks and splashes, producing weld seams of high quality and purity with hardly any deformation. The welding parameters are easily controlled via the control panel. You can weld from different positions, be it vertical, horizontal or overhead.

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  • Professional high-frequency ignition
  • Gas post-flow time seamlessly variable
  • Optimized current increase and decrease time prevents damage to the weld
  • Also suitable for thin metals from 0.5 mm
  • Hardly any sparks, slags or post-processing

E-hand - flexible electrode welding without extra gas


For E-Hand welding, no extra gas is needed. The welder can be used outdoors, even in strong winds. The welder generates a very stable current with a steady voltage. As a result, very good welding results are achieved in a variety of metals. The Hot Start, Arc Force and Anti-Stick functions make for optimal welding results, enabling automatic welding in a quick and easy manner.

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  • Hot Start, Arc-Force, Anti-Stick
  • Outside welding without gas
  • Metal welding from a thickness of 1.5 mm

FCAW - Weld small metalwork with fluxcored wire


With FCAW welding, a fluxcored wire creates the weld without the need for additional gas as protection. The device is therefore very handy and allows for welding from different positions and can also be used outdoors. It is suitable for a variety of smaller metalwork, repairs or basic welding on the car.

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Note: The 400 V plug is not included in delivery.


  • Versatile with WIG, MIG/MAG, E-Hand and FCAW welding
  • High-powered 250 S (MIG) at 60% duty cycle
  • Readable control panel with toggle switches and rotary knobs and 2 LED displays
  • MMA functions: Hot Start, Arc Force
  • Inductivity prevent welding splashes (MIG/MAG)

Multi Process Welder - 250 A - 400 V - MIG/MAG - WIG - E-Hand - FCAW

Whether with or without protective gas, the multi process welder has four welding methods with which you can weld different metals efficiently and safely. The high-performance professional welder impresses with universal application possibilities and high-quality welds with a low error rate.

Item number
Input voltage
Input frequency
Rated input current
9.8 A
Input current, max.
12.6 A
Rated input power
8.1 kVA
Input power, max.
11.1 KVA
Open-circuit voltage
63 V
MIG welding current
15.5 - 26.5 V
Welding current WIG-DC
20 – 230 A
Welding current MIG
30 – 250 A
Welding current (MMA)
10 – 230 A
Welding current at 100 % duty cycle
194 A (MIG), 178 A (WIG), 178 A (MMA)
Welding current at 60 % duty cycle
250 A (MIG), 230 A (WIG), 230 A (MMA)
Gas solenoid valve
Diameter, welding wire
0.6 / 0.8 / 1.0 / 1.2 mm
Diameter, electrodes (WIG)
1 - 3.2 mm
Diameter, electrodes (MMA)
1.6 - 5 mm
Ignition (WIG)
High frequency (HF)
Welding strength (MMA)
1.5 - 9 mm
Welding strength (WIG)
1 - 6 mm
Power factor
Efficiency (below rated power)
0.85 %
Hot Start
Switch for 2-/4-step operation
Device cooling
Power ventilator
Cooling distiller
Spool Gun connection
Insulation class
Protection class
IP 21 S
MIG cable assembly
3 m
MIG/MAG welding torch type
Inotec 25
MMA welding cable with electrode holder
4 m
WIG cable assembly
4 m
WIG welding torch type
Ground cable
3 m
Power cable
2.7 m
Dimensions (LxWxH)
101 x 45 x 75 cm
49.75 kg
Shipping dimensions (LxWxH)
90 x 43 x 81 cm
Shipping weight
65 kg
Delivery Package
  • Multi process welder S-MULTI 250M
  • WIG cable assembly, 4 m
  • MIG cable assembly, 3 m
  • MMA welding cable with electrode holder, 4 m
  • Grounding cable with clip, 3 m
  • Gas hose
  • 3 ceramic nozzles (5, 6, 7 mm)
  • Clamping sleeve casing
  • Clamping sleeves (1.6 / 2.4 / 3.2 mm)
  • Long back cap
  • Instruction manual

The welder is equipped with a MOSFET transistor. This technology represents the highest standards of performance combined with compact and lightweight design. The result is 93% efficiency! The welding current is very stable and thus ensures a perfect weld.

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Powerful fans ensure an optimal removal of heat from the unit.


TIG/MIG and MAG welding require a protective gas. Inert gases, such as argon and helium, as well as active gases (for example carbon dioxide) and other mixtures can be used. The solenoid valve regulates the flow of gas. The valve is operated via a button on the torch.

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For plasma cutting, a gas is required with which the molten metal is blown away from the work surface. Compressed air is a common solution for this. For this purpose, the plasma cutter has a compressor connection.

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This device works with a 3-phase connection (400 V +/- 10 %).


A non-contact high-frequency ignition in TIG mode ensures a cleaner weld starting point.


The time taken by the output power to rise to that of the welding current’s value.




The time taken of the output welding current to lower to that of the terminal current.


The time after the weld is finished in which gas continues to flow from the torch; this cools the burner and protects the weld from oxidation.


Start the weld by placing pressure on the torch button. Stop the process by releasing the button.


By pressing the torch button the solenoid valve opens. allowing the gas to flow in. The gas pre-flow ignites the arc at the pre-set current. Releasing the burner button initiates a rise in the current to that of the pre-set welding current. The welding process stops once you press the burner button again.

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Through automatically boosting the tension at the ignition of the arc, this function facilitates the electrical arc ignition. After ignition, the unit automatically returns to the pre-set voltage.

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The current value increases automatically when the arc is shorter.

INDUCTANCE (spatter)

Along with the current change the value of the inductance is changed to reduce the amount of spatter.


A welding method in which the arc is maintained through an electrical current supplied from a non-consumable electrode. The arc is protected from the access of air by an inert gas.

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Electrode welding with a coated electrode.


Welding with wire feed in a protective atmosphere.


Choose between the 2T and 4T mode.


By using the SHIFT key the welding mode can be selected.


Shows the welding / cutting parameters.


The LED light indicates overheating or a malfunction.

Where can I find a matching welding helmet?

Welding helmets can be found in the category Welders / Welder clothing, in the subcategory Welding helmets. There, you find a large selection of welding helmets.

How can I ensure that the welding equipment that I buy fits with the welder?

When choosing accessories, expondo carefully ensures that all components work well together, so that you can achieve the best welding results.

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4.5 Based on 4 reviews

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Reviews from Docol welder (15 Dec 2020)
Reviews from Docol welder (15 Dec 2020) S-MULTI 250M

En jäkligt fin svetsmaskin, går väldigt bra

Reviews from Jaroslav (7 Aug 2020)
Reviews from Jaroslav (7 Aug 2020) svářečka

spokojen se všemi funkcemi, rychlost dodání

Reviews from Alfred Rüttimann (1 Jun 2020)
Reviews from Alfred Rüttimann (1 Jun 2020) In Ordnung

Leider wird eine unzureichende Bedinungsanleitung mitgeliefert. Auch die PDF Anleitung ist verwirend, leider einfach mangelhaft.
Das MIG-Schweissen ergibt akzeptable Ergebnisse.

Reviews from Anonym (25 May 2020)
Reviews from Anonym (25 May 2020) Erinomainen

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