Is it possible to measure SCR VRGM using a curve tracer?

Discussion in 'General Electronics Chat' started by lawcuenca, Aug 7, 2011.

  1. lawcuenca

    Thread Starter New Member

    Jun 15, 2011
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    If its possible, then kindly teach me how. Thanks!
     
  2. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    Why do you need to measure VRGM?
     
  3. lawcuenca

    Thread Starter New Member

    Jun 15, 2011
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    Just to verify the data sheet values. Do you know a way to do it?
     
  4. kubeek

    AAC Fanatic!

    Sep 20, 2005
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    Dunno, but I don´t think a curve tracer is suited for such test. IIRC there is one p-n junction from gate to cathode, so if you exceed the reverse breakdown voltage of that junction, you will see a steep incresase in gate current.

    Nevertheless, this says nothing about any relation to Vrgm, i.e. what voltage actually breaks the SCR beyond recovery. That would mean trying a lot of SCRs and checking if they are burnt yet while cyclicaly increasing the reverse voltage applied.

    A lot of time and money spent on a seemingly pointless test. Just keep your voltage below the recommended level.
     
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  5. #12

    Expert

    Nov 30, 2010
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    I second that. No need to see where the part gets destroyed unless you are the manufacturer.
     
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  6. lawcuenca

    Thread Starter New Member

    Jun 15, 2011
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    I understand. Thanks for the insight!
     
  7. lawcuenca

    Thread Starter New Member

    Jun 15, 2011
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    I understand. Thanks for the insight!
     
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