Help to identify SMD Zener diode

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  • Per Hansson
    Super Moderator
    • Jul 2005
    • 5895
    • Sweden
    #1

    Help to identify SMD Zener diode

    Hi, I have this Zener diode that is open.
    I took pictures before desoldering it, I have attached them here.
    Can anyone tell what Zener voltage this has from the markings?
    I have an idea but don't want to cloud the opinions so I'll wait for what you say...
    Attached Files
    "The one who says it cannot be done should never interrupt the one who is doing it."
    Tags: None
    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 30979
      • Albion
      #2
      Re: Help to identify SMD Zener diode

      5v1 zener or a 7v tvs in my book.

        Comment

        • redwire
          Badcaps Legend
          • Dec 2010
          • 3906
          • Canada
          #3
          Re: Help to identify SMD Zener diode

          Not sure if SOD-123 or SOD-323 package.
          Diodes Inc DDZ5V1BS SOD-323
          Diodes Inc DDZ5V1B SOD-123
          It used to be a Zetex part.

            Comment

            • petehall347
              Badcaps Legend
              • Jan 2015
              • 4426
              • United Kingdom
              #4
              Re: Help to identify SMD Zener diode

              probably get an educated guess from where it is fitted in the circuit . tvs would test open as a diode . is there another the same in the unit ?

                Comment

                • Per Hansson
                  Super Moderator
                  • Jul 2005
                  • 5895
                  • Sweden
                  #5
                  Re: Help to identify SMD Zener diode

                  Thanks, yes this is the same as I figured, it seems to match SOD-123 physically and that it infact is a Diodes Inc DDZ5V1B (5.1v Zenerdiode with 0.5w rating)
                  What threw me off was a Youtube video where in the comments people wrote it was a 5.2v Zener, but seeing how uncommon those are I doubted it...
                  I'm glad you all agree
                  "The one who says it cannot be done should never interrupt the one who is doing it."

                    Comment

                    • Per Hansson
                      Super Moderator
                      • Jul 2005
                      • 5895
                      • Sweden
                      #6
                      Re: Help to identify SMD Zener diode

                      Posting this here also for future reference, it's from the datasheet.
                      The date code marking is B5 (May 2014) and this matches well with other components on the PCB.
                      The zener diode model marking is KM (DDZ5V1B)

                      Attached Files
                      "The one who says it cannot be done should never interrupt the one who is doing it."

                        Comment

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