I have an automotive Exide battery charger Model 15002 that has the connection tab broken off on one of the diodes. I need to replace the diode. It is pressed in and I have removed it. Diameter of the Diode is .500 inches and it is about .250 inches deep. Battery Charger has 3 ranges 75/23/12 amps output. I need to purchase a diode but don't have any part numbers and don't know where to purchase one. Any Help would be appreciated.