Power dissipated by diode

Replies

• 

  Sindhu Chowdary

  Conqueror

  Hey
  
  can you guys tell me what will be the power dissipated by a diode 1N4007 if excited by a AC source of 30V peak to peak
  
  Cut in also info regarding the maximum responding frequency of the diode in actual practical scenario
  
  I heard 1n4007 is a low speed diode of switching speed of a few 100 khz

  
  you mentioned when 1N4007 is excited by 30V supply...
  did you mean the 30V as the forward voltage??
  read this:
  the maximum reverse voltage that can be applied to 1N4007 is 1000v because beyond this the diode will get damaged..
  similarly the maximum forward voltage we can apply is around 0.7v....
  if you exceed these values diode may be damaged due to excess current..
  now make it clear whether 30V is forward current or reverse current..
• 

  Harshad Italiya

  gwendollen

  you mentioned when 1N4007 is excited by 30V supply...
  did you mean the 30V as the forward voltage??
  read this:
  the maximum reverse voltage that can be applied to 1N4007 is 1000v because beyond this the diode will get damaged..
  similarly the maximum forward voltage we can apply is around 0.7v....
  if you exceed these values diode may be damaged due to excess current..
  now make it clear whether 30V is forward current or reverse current..

  Seems you misunderstood here. He said 30v peak to peak AC voltage. And I think it is not going to damage diode as this diode can be used normally for rectification.
• 

  Jeffrey Arulraj

  Hey I guess I am not clear in my qn
  
  Can anyone help me out in this I heard heard nearly 60 V positive voltage can be applied before the diode gets destroyed due to over heating
  
  That is why I wanted to know the power dissipated by the diode when 30 V AC is applied to the diode
• 

  a.alandkar

  If you know the avg DC current then the power loss can be calculated, using
  P= Vf X Iavg
  i.e. P = 0.7 X Iavg