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Discussion in 'General Electronics Discussion' started by bigone5500, Nov 8, 2014.

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  1. bigone5500

    bigone5500

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    Apr 9, 2014
    I would like to know what these are. I got them from a power supply pcb out of a laser printer. The silk screen label said VZxxxx.

    tmp_17187-20141108_105242-1265654481.jpg
     
  2. BobK

    BobK

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    Jan 5, 2010
    Despite the VZ designation, they look like 27pF ceramic capacitors to me.

    Bob
     
  3. davenn

    davenn Moderator

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    Sep 5, 2009
    except there's a much higher chance they are a varistor of some sort

    why do you want to replace them .... that is, why do you think they are faulty ?

    have you measured them with a multimeter on resistance range ?

    Dave
     
  4. BobK

    BobK

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    1,686
    Jan 5, 2010
    You are probably right, dave, ignore what I said.

    Bob
     
  5. davenn

    davenn Moderator

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    Sep 5, 2009
    its all OK :)
    multiple thoughts and ideas is what its all about
     
  6. hevans1944

    hevans1944 Hop - AC8NS

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    Jun 21, 2012
    VZxxxx isn't much help. They look like small-valued capacitors, but could also be MOV varistors used for surge protection. Most varistors I have seen have the leads welded to opposite sides of the disk though, so your guess is as good as mine without electrical testing.
     
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