The LiftMaster K41-0390-000 EMI Board is a high-voltage electromagnetic interference filter designed for Maxum series garage and commercial door operators that use a 480VAC power supply. It is engineered to maintain consistent electrical performance in demanding environments where interference can disrupt electronics and control logic.
This EMI board helps protect sensitive operator components from electrical noise and interference by filtering the incoming power before it reaches the control systems. Suppressing unwanted electrical disturbances can reduce erratic behavior, improve responsiveness, and contribute to overall system stability.
Built for compatibility with 700 and 1200 series Maxum operator models in 480VAC installations, the K41-0390-000 board integrates seamlessly into existing hardware. Its durable design supports long-term use in commercial and industrial settings where reliable performance is critical.
Replacing a worn or faulty EMI board with this genuine LiftMaster part helps ensure continued dependable operation of your high-voltage garage door or commercial access system. It is a practical choice for technicians and maintenance professionals seeking to minimize interference-related issues and extend the lifespan of their equipment.