266586 - Miller Flyback Circuit Board 60W 940V Replacement

Genuine Miller 266586 Circuit Card Assembly

The Miller 266586 Circuit Card Assembly is a critical electronic component designed for specific high-performance Miller welding power sources. This board utilizes a flyback topology, a configuration often used in power supplies to convert voltage levels efficiently while providing electrical isolation. With a power rating of 60 Watts and an input voltage specification of 940 Volts, this assembly is engineered to handle significant electrical stress within the machine's internal power architecture. It serves as a vital link in the power management system, ensuring that the welding arc and auxiliary functions receive stable and regulated energy.

Important Procurement Information: Due to the sensitive nature of electronic repair parts, this item is subject to a strict No Returns policy. It is imperative that the purchaser verifies the exact fitment for their specific machine model. Compatibility can vary based on the machine's serial number and manufacturing date. We strongly recommend contacting Miller Technical Support at (800) 558-3517 with your machine's serial number ready to confirm that part number 266586 is the correct replacement for your unit. Attempting to install an incorrect circuit board can lead to further machine damage or component failure.

Installation of the Miller 266586 should only be performed by a Certified Miller Technician. The high input voltage (940V) present in the system poses significant safety risks to untrained personnel. Furthermore, if a defect or problem is suspected with the new part, diagnosis must be confirmed by a certified technician. This ensures that the root cause of the original failure—such as a short circuit elsewhere in the machine—has been addressed before the new board is energized. By choosing this genuine OEM part, you are maintaining the integrity and safety certification of your industrial welding equipment.