MX 350
  • Operation concepts: BasicPlus
  • 10 - 350 A
  • ED 60% at 40°C: 280 A
  • Weldable wires steel: 0.8 – 1.2 mm Ø
MX 350


The Lorch MX 350 is optimally equipped for mobile outdoor use with its robust and weatherproof housing with IP34 and a drop resistance of up to 60 cm height.

Extra performance with the MicorBoost.

Significantly higher voltage reserves can be activated when external interferences drop the current, leading to perfect MMA welding.

Synergy mode.

With optional MIG-MAG synergy mode for excellent MIG-MAG welding properties with mixed gas and CO₂ alike.

Multi-process and full flexibility thanks to MF-07 wire feeder.

The MX 350 is an excellent tool for mobile use as well when combined with the separate wire feeder MF-07. The MF-07 can cope with all kinds of sheet metal and medium to heavy steel work.

The case is designed for use with K 300 wire rolls to keep you up to speed when welding. It is also TIG-, MMA-, and CEL-capable, permitting adjustment to various tasks at need.

Country-specific product variants.

Country-specific product variants are available for this Lorch welding unit. These may differ in the mains supply, the mains plug or other product features required for the country. You want to know more? Contact your local Lorch partner.

Technical data

MIG-MAG welding
Welding range 3~ 400 V: [A] 10 - 350
Voltage range: [V] 14.5 - 31.5
Weldable Wires Steel: [Ø in mm] 0.8 - 1.2
Weldable wires aluminum: [Ø in mm] 1 - 1.2
Weldable wires CuSi: [Ø in mm] 0.8 - 1.2
Voltage setting
Voltage setting: Continuo
MIG-MAG duty cycle
Duty cycle 100% (40°c): [A] 230
Duty cycle 60% (40°c): [A] 280
Duty cycle at max. current (40°c): [%] 35
TIG welding
Welding range 3~ 400 V: [A] 10 - 350
Voltage range: [V] 10.4 - 24
TIG Duty cycle DC 400 V
Duty cycle DC 100% (40°c): [A] 250
Duty cycle DC 60% (40°c): [A] 300
Duty cycle DC at max. current (40°c): [%] 40
Electrode welding
Welding range 400 V: [A] 10 - 350
Voltage range: [V] 20.4 - 34
Weldable electrodes: [Ø in mm] 1.5 - 8
Electrode duty cycle
Duty cycle 100% (40°c): [A] 230
Duty cycle 60%: [A] 280
Duty cycle at max. current (40°c): [%] 35
Process-independent data
Open circuit voltage: [V] 78 - 81
Mains 400 V
Mains voltage 3~ (50/60 Hz): [V] 400
Mains fuse 3~ (50/60 Hz): [A] 25
Positive mains tolerance 3~ (50/60 Hz): [%] 25
Negative mains tolerance 3~ (50/60 Hz): [%] 40
Mains plug
Mains plug: CEE 32
Standards and approvals
Protection class: IP34S
Insulation class: F
Norm/Standard: EN 60974-01
Designation/Certification: CE, S
Cooling type
Cooling type: Gas-cooled
Dimensions length x width x height
Dimensions (LxWxH) [mm] 515 × 185 × 400
Dimensions wire feed case (LxWxH) [mm] 610 × 260 × 400
Weight: [kg] 18.6
Weight wire feeder case: [kg] 10


  • “3 steps and weld” operating concept
  • Simple one-button operation
  • Amperometric digital display
  • Electrode preselection (basic, rutile, and CEL) for optimal welding parameters
  • Hot start in submenu


You would like to learn more? Technical data as well as details on application and equipment can be found here:

Always the best advice: close, personal and honest.

You are interested in a Lorch welding machine but you are not sure which model is the right one for you or you have other questions? Use our Partner Finder to easily find a competent contact person near you and get personal advice.