varistors

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  • kai888
    New Member
    • Mar 2011
    • 1
    #1

    varistors

    Hi guys, i have a circuit board with a blown znr varistor,
    the markings on it says 14k471u S45

    so far i can only work out the 14 = diametre and 471 is the capping voltage.
    I'm not sure with that U stands for or the S45

    i couldn't find this at farnell or rsaustralia.

    does any one know where i can get my hands one of these varistors.

    The manufacturer logo is a square with the letter M inside.

    thanks.
    Tags: None
    • steve2
      Senior Member
      • Dec 2010
      • 121
      #2
      Re: varistors

      http://search.digikey.com/scripts/Dk...&name=P7222-ND I think this is the correct one. 14mm 470v surge 4500

        Comment

        • Scenic
          o.O
          • Sep 2007
          • 2642
          • Germany
          #3
          Re: varistors

          Originally posted by kai888
          The manufacturer logo is a square with the letter M inside.
          sounds like Matsushita a.k.a. Panasonic

            Comment

            • Supertech
              New Member
              • Mar 2011
              • 3
              #4
              Re: varistors

              14D471K $.80 from WES that will work, it will blow at 300 volts AC
              OR maybe 14D431K that will blow at 275v. I take it its just in the primary of of a psu ?

                Comment

                • Th3_uN1Qu3
                  Believe in
                  • Jul 2010
                  • 6031
                  • Romania
                  #5
                  Re: varistors

                  If you use an AC varistor you put it across the line. If you use the 275v one you need two and you put them across each primary cap.
                  Originally posted by PeteS in CA
                  Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
                  A working TV? How boring!

                    Comment

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