breakdown voltage and avalanche voltage

Discussion in 'General Electronics Chat' started by PG1995, May 30, 2011.

  1. PG1995

    Thread Starter Active Member

    Apr 15, 2011
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    Hi :)

    There is a breakdown voltage and avalanche voltage for a diode. What's the difference? I couldn't really find any distinct difference. Could you please help me? Thanks.
     
  2. Adjuster

    Well-Known Member

    Dec 26, 2010
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  3. PG1995

    Thread Starter Active Member

    Apr 15, 2011
    753
    5
    Thank you, Adjuster.

    Okay, breakdown voltage is a term for voltage at which a diode starts to conduct when it is reverse biased. In case of forward biasing the voltage at which the diode conducts is called knee voltage (in case of Silicon voltage it's 0.7V).

    What is term for voltage limit when the diode will be destroyed? Destroying voltage?

    I think there is no thing such as "avalanche voltage" rather the proper term is "avalanche effect". Please let me know your opinion.

    Thank you for your time and help.
     
  4. Jony130

    AAC Fanatic!

    Feb 17, 2009
    3,963
    1,098
    For the "normal" diode the breakdown voltage will destroyed the diode.
    Unless we limit the breakdown current to such a values that power dissipation in the diode is less the max allow power.
     
    Last edited: May 31, 2011
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