1N5402 Diodes as 250 AC Regulators

Discussion in 'The Projects Forum' started by jj_alukkas, May 19, 2009.

  1. jj_alukkas

    Thread Starter Distinguished Member

    Jan 8, 2009
    751
    6
    I'm having a PC SMPS with its bridge blown off leaving diodes conducting both ways.. The 4 diodes used were RL205 having a rating of 2A 600V reverse blocking. Can I replace them with 1N5402 Diodes, as they have 3A but only 200V reverse.. I guess when 2 of them come in series during a rectification phase would make it work at 250VAC or would it short ?
     
  2. bertus

    Administrator

    Apr 5, 2008
    16,442
    2,702
    Hello,

    I think it is not a good idea to use the 1N5402.(they will probably break).
    Better use a higher voltage rating.
    You can better use the 1N5406 (600 Volts) or 1N5408 (1000 volts).
    Also take a look why the diodes got broke.
    Is there a short behind the diodes?

    Greetings,
    Bertus
     
    Last edited: May 19, 2009
  3. mik3

    Senior Member

    Feb 4, 2008
    4,846
    65
    You can use diodes with a peak reverse voltage of 600V or more than 600V.
     
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