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Discussion in 'General Electronics Discussion' started by Pavan Penugonda, Nov 30, 2015.

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  1. Pavan Penugonda

    Pavan Penugonda

    Nov 30, 2015
    • I have a question about Diode. That is when two diodes are in series (one is forward direction and another one is in reverse direction ). Then, whether the current will flow in the circuite ,then what voltage.
  2. Martaine2005


    May 12, 2015
    I suppose the diode drop of .3 to .7 volts plus the breakdown voltage of the reverse biased diode. This all depends on the diodes used.

  3. pgib8


    Jul 26, 2015
    Here's the thing, a regular diode has a very high reverse breakdown voltage, you may need to have like 1000V to overcome it (just an example), plus then you probably break the diode. So really, no current will flow. Now there are zener and TVS diodes that are designed to have a specific and much lower reverse breakdown voltage, for example 12V. This means once you reach that, current starts to flow. slightly below that, very little will flow and a good amount below that, nothing will flow.
    As far as a forward conducting diode, yes it will drop some volts, maybe 0.7V but that also depends on the current. If you have very little current going through it, the diode will drop like no voltage at all. The datasheet will have a curve showing you what the voltage drop is for a given current.
    Pavan Penugonda likes this.
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