Discussion in 'General Electronics Chat' started by Management, Nov 16, 2010.
Anyone know of any good 5V Zener Diodes?
What wattage? My PaintCAD has a list of standard zener values, but they aren't the only ones out there. The 1N751 is very popular for example.
I've created a stock similar to my resistor storage for them.
Here is a nice zener diode value table:
If you're trying to get exactly 5V zener voltage, forget it. Zener voltage varies with current, and provided you are using a simple zener and resistor circuit, the output voltage will vary with input voltage. Also, most zeners are only available in +/-5% tolerances; a few are in +/-1%.
4.7V and 5.1V zeners are the closest standard +/-5% values.
If you want a voltage as close as possible to the 5 Volts, you could also use a TL431, adjustable zener.
With a couple of presision resistors you can make the TL431 to give 5 Volts.
Thank you all for the references. Much appreciated.