0558003340 - ESAB MiniArc 150 Main Control Board Replacement

Precision Control for Professional Welding

The ESAB 0558003340 PCB Control Board is the critical central processing unit designed exclusively for the ESAB MiniArc 150 welding power source. As the electronic brain of the machine, this printed circuit board manages the complex interplay of input power conversion and output current regulation, ensuring the stable arc characteristics that professional welders rely on. When a control board fails, it can manifest as erratic arc behavior, loss of output, or complete system failure. Replacing it with a genuine OEM component is the only way to ensure the machine returns to its original performance standards.

Manufactured to ESAB's rigorous quality specifications, this PCB features industrial-grade components capable of withstanding the thermal cycling and electrical noise typical of welding environments. It handles the logic for thermal overload protection, current settings, and arc start initiation. Using non-OEM electronics in sophisticated inverter-based machines can lead to calibration drifts or further damage to power modules. This board provides a direct, drop-in solution that aligns perfectly with the MiniArc 150's internal wiring harness and mounting standoffs, minimizing downtime during repairs.

For maintenance technicians and industrial repair specialists, sourcing the correct revision of control electronics is paramount. The 0558003340 is the specified replacement part, ensuring that all control potentiometers and feedback loops function exactly as designed. Whether diagnosing a 'dead' machine or resolving intermittent control issues, this board restores the reliability and precision expected from ESAB equipment.