Microwave Inverter Board W11325604 4.25 x 4.50 x 5.75 Genuine OEM. This is a Genuine OEM part. This inverter board (part number W11325604) is for microwaves. Inverter board W11325604 regulates power to the magnetron. Because high-voltage capacitors in a microwave can retain a lethal electrical charge even when the ... - Microwave Inverter Board W11325604 4.25 x 4.50 x 5.75 Genuine OEM.