Different Diode

I believe you can use the IN4001 without any problems.

1N4001= 1A diode 1N4003= 3A doide Either will work.... the only time you should be concerned about the voltage rating of a diode in a car is if you are using zener diodes (highly uncommon, and unlikely). The current rating is more important.... 1A will take care of most applications.... 3A or 6A will work well for things like isolating VW parklight circuits. Gus Wherever I go, that is where I end up......

Technical correction Gus, The 1N4000 series rectifiers are all rated at 1 AMP. The difference in values is the PIV or Peak Inverse Voltage that they can handle. 1N4001 = 1 Amp, 50v PIV 1N4002 = 1 Amp, 100v PIV 1N4003 = 1 Amp, 200v PIV etc. The 1N5400 series are the 3 AMP rectifiers, 1N5400 = 3 Amp, 50v PIV 1N5402 = 3 Amp, 200v PIV 1N5404 = 3 Amp, 400v PIV etc. The price difference between a 50v diode and a 200 - 400v diode is usually only a penny or two, so I usually purchase the higher rating as an added margin of safety. You're right about the current rating, when in doubt, use a 3 amp diode instead a 1 amp.

It's been awhile since the Grob book has been opened... heehee. Correction taken! Gus Wherever I go, that is where I end up......

Yeah Gus, I have to blow the dust off my old textbooks every once in a while too. I love your sig. line, it prompted me to add mine"The presence of smoke may indicate that maximum performance has been exceeded."