Zener Diodes

Discussion in 'General Electronics Chat' started by Management, Nov 16, 2010.

  1. Management

    Thread Starter Active Member

    Sep 18, 2007
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    Anyone know of any good 5V Zener Diodes?
     
  2. Wendy

    Moderator

    Mar 24, 2008
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    2,744
    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.
     
  3. bertus

    Administrator

    Apr 5, 2008
    17,113
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  4. tom66

    Senior Member

    May 9, 2009
    2,613
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    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.
     
  5. bertus

    Administrator

    Apr 5, 2008
    17,113
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    Hello,

    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.

    Bertus
     
  6. Management

    Thread Starter Active Member

    Sep 18, 2007
    306
    0
    Thank you all for the references. Much appreciated.
     
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