Need to get specs for this electrolytic cap please

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  • lightbeing
    New Member
    • Jul 2022
    • 7
    • UK

    #1

    Need to get specs for this electrolytic cap please

    Hi,
    I would be very grateful if the make of this 100uf 35V smd cap in the photo can be identified. It is used in dc-dc converter on a 15 years instrument board that is fairly used. I would ideally like to find its specs in order to replace it with a similar one, that has similar ripple current, ESR, etc.
    Thank you!
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  • redwire
    Badcaps Legend
    • Dec 2010
    • 3900
    • Canada

    #2
    Re: Need to get specs for this electrolytic cap please

    It looks like a Lelon VE series part.

    Comment

    • lightbeing
      New Member
      • Jul 2022
      • 7
      • UK

      #3
      Re: Need to get specs for this electrolytic cap please

      Thats great! Many thanks for your help redwire!
      I couldn't find the ESR value in the specs so I calculated it from the given Tanδ value, which came to be 1.59 Ω. That calculation is done at 120Hz however that cap is working as an input filter for dc-dc converter running at 1Mhz so its ESR would be much less...
      I guess it would be okay to replace it with a new cap of a much lower ESR value?
      thanks again

      Comment

      • andrewsawesomr
        Senior Member
        • Jun 2022
        • 100
        • United States of America

        #4
        Re: Need to get specs for this electrolytic cap please

        This isn't a low ESR capacitor, do I don't think you need to replace it with one, but I would recommend replacing it with a higher-hour or higher temp. capacitor.

        Comment

        • PeteS in CA
          Badcaps Legend
          • Aug 2005
          • 3576
          • USA, Unsure of Planet

          #5
          Re: Need to get specs for this electrolytic cap please

          Originally posted by andrewsawesomr
          This isn't a low ESR capacitor, do I don't think you need to replace it with one, but I would recommend replacing it with a higher-hour or higher temp. capacitor.
          Lelon's VE series is rated for 85C, which means it's a general purpose type, not low impedance. So a GP 105C part from a good manufacturer would be a good improvement.
          PeteS in CA

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          • lightbeing
            New Member
            • Jul 2022
            • 7
            • UK

            #6
            Re: Need to get specs for this electrolytic cap please

            Many thanks for everyone.

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