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Diodes

Discussion in 'General Electronics Discussion' started by zemaj, Mar 18, 2011.

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  1. zemaj

    zemaj

    6
    0
    Mar 7, 2011
    Hi,

    I have a question, just say the input is 7-32V into a circuit. 4 diodes px6007 connected in parallel are there just in case for reverse polarity protection. The question is why, there are 4 there and how to do the calculation when diodes are in parallel.

    px6007 specs are: I think, 6A, 1000V, Pmax = 5W, Tjmax = 150C.

    Thanks
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,497
    2,839
    Jan 21, 2010
    Connected in parallel how?

    Perhaps you can show us a circuit diagram.

    Is it like one of these?

    [​IMG]

    And what do you want to calculate?
     

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  3. zemaj

    zemaj

    6
    0
    Mar 7, 2011
    Thanks for your reply,

    (A) seem to be the right idea.

    -Power dissipate for each diode
    -equations or method to work them out.

    Thanks
     
    Last edited: Mar 18, 2011
  4. davenn

    davenn Moderator

    13,866
    1,958
    Sep 5, 2009
    there's no valid reason for putting a set of diodes in parallel like that for reverse polarity protection

    a single diode of the appropriate current rating would be sufficient

    Dave
     
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