Manufacturer Name: Mitsubishi Electric Product Number: E22D21444 OEM Part Number: E22D21444 Product Description: Noise Filter Pc Board Weight:1.84lbs/834.61g The Mitsubishi Electric E22D21444 Noise Filter Printed Circuit Board is an essentialpart of some of the Mitsubishi Electric HVAC products. It works by suppressing electromagnetic interference, which is common within the unit. https://www.partshnc.com/e22d21444-mitsubishi-electric-noise-filter-pc-board