The Model 50e47-843 Furnace Control Circuit Board with D Chip is designed for White-Rodgers brand central furnaces. This corded electric control board has at 24V with 50A of amperage. Made of plastic material, this furnace control board is compatible with White-Rodgers products and is designed for a single-phase power source. Ideal for HVAC and refrigeration systems, this circuit board is a reliable part for maintaining and repairing furnace systems in industrial and commercial settings.tested working good as is