The MMA-250 is a compact and powerful inverter-type welding machine designed for welding metal structures, pipes, frames, and various metal components. The device operates on a single-phase 220–240 V network and provides a stable arc, precise current adjustment, and reliable performance in daily conditions.

The machine is equipped with a modern electronic control system that ensures easy arc ignition, stable current delivery, and overheating protection. Its compact design and convenient transport system allow it to be used both in workshops and on construction and installation jobs.

The model complies with the international standard IEC 60974-1, ensuring safe and stable operation even under professional conditions.

Main parameters

Model • MMA-250
Type • Inverter welding machine
Supply voltage (U1) • 220–240V, 1 phase, 50/60Hz
Open circuit voltage (U0) • 67V
Current adjustment range • 20 – 250A
Duty cycle (Duty Cycle — X) • 60% — 250A
Continuous operating current • 194A (100%)
Output voltage (U2) • 30V
Maximum input current (Imax) • 43A
Average consumption (Ieff) • 33A
Protection class • IP21S
Standard • IEC 60974-1
Country of manufacture • China

Working capabilities

Electrode diameter • 1.6 – 3.2 mm (stable operation)
Electrode diameter • 4.0 mm (with limited load)

Recommended metal thickness:
1 – 6 mm — continuous work
6 – 8 mm — step-by-step welding

Applications

Metal structures
Iron frames
Pipe welding
Repair works
Construction and installation works
Workshop and household use

Technical explanation

Standard • IEC 60974-1 — international standard for arc welding machines, defining safety and operating modes.

Supply voltage (U1) • 220–240V
Operation from a single-phase electrical network.

Open circuit voltage (U0) • 67V
Ensures easy arc ignition and stable start.

Output current range • 20A – 250A
Operating current adjustment range for materials of different thicknesses.

Output voltage (U2) • 30V
Standard operating voltage at maximum load mode.

Duty cycle (Duty Cycle — X)

60% — 250A
Means that in a 10-minute cycle:
the machine operates for 6 minutes at full load (250A)
and requires 4 minutes for cooling

100% — 194A
the machine can operate continuously at 194A without overheating.

Input current

Maximum consumed current (Imax) • 43A
Average effective consumption (Ieff) • 33A

Practical recommendation

Minimum recommended:

Circuit breaker • 32 – 40A
Cable • 4 – 6 mm²

Protection and construction data

Protection class • IP21S

IP21 means:

protected against solid particles larger than 12 mm
protected against vertically falling water drops

Intended for indoor use
Not recommended for use in rain or open environments without protection