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Half Wave Rectifier: Vi > PIV

  1. Jan 21, 2010 #1
    Was wondering what would happen to the output voltage when the input voltage exceeds the PIV/PRV.
  2. jcsd
  3. Jan 21, 2010 #2


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    Staff: Mentor

    Could you please define your terms, and maybe provide a datasheet for a part? Is PIV peak inverse voltage?
  4. Jan 21, 2010 #3
    For a single-diode half-wave rectifier going into a capacitor filter, the peak repetitive inverse/reverse voltage on the diode is TWICE the peak input ac voltage. If you exceed the PIV/PRV and short the diode, you could damage other components (transformer, etc.) and maybe start a fire. If the diode opens up, your output dc voltage goes to zero. This could even happen if you don't exceed PIV/PRV.

    Bob S
    Last edited: Jan 21, 2010
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