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Best mark/type...of electrotytic capacitors

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    #1

    Best mark/type...of electrotytic capacitors

    Haven't you noticed recently that some (in fact many) types of relatively cheap electrolytic CAPS fail after no longer than a few months??.. Specially those of east asian origin...I start to become sick of returning repaired LCD/LED TVC's for the same symptoms and reasons: same failure of same caps in the SMPS area!! Very short lifetime...Even higher than required voltage / temperature rating doesn't help much!
    The question I ask is: where does the real manufacturing deficiency or problem reside in their fabrication ? The chemical/dielectric procuct inside these capacitors or what, exactly?
    The other quest is: What is your advice regarding the choice of good/better/ best longlife caps?
    I'm ready to pay 10$ for just ONE 470 or 1000 micofarad/50 or 63v if I know that its life time is a garanteed "more than 5 or 10 years" period (in normal working conditions). I know It's worth it, very simply because my client will get full satisfaction and he/she may come back for repair but NOT for the SAME problem!
    TH....HANKS
    Last edited by Ahakim; 05-05-2013, 01:44 AM.
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    #2
    Re: Best mark/type...of electrotytic capacitors

    Rubycon ZLJ perhaps

    http://www.digikey.com/product-detai...430-ND/3134386

    Panasonic uses Rubycon and the rest of the TV usually dies before they do.

    The ECU in my car has Rubycons in it and it's 19yo and still going.

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      #3
      Re: Best mark/type/name...of electrotytic capacitors inquiry

      Originally posted by Ahakim View Post
      Haven't you noticed recently that some (in fact many) types of relatively cheap electrolytic CAPS fail after no longer than a few months??.. Specially those of east asian origin
      What are you using for replacement caps (what brand and series) and where are you buying them from?

      Since you live in the USA, you have access to high quality caps from reputable distributors like digikey, mouser, etc.

      With digikey, you can get high quality Japanese (Panasonic, Nichicon, Rubycon, United Chemi-con) made low ESR caps at a competitive rate with typically $3 USD shipping within 2 to 3 days.

      95%+ of the caps sold on ebay are either the worst possible quality or counterfeits.
      Last edited by retiredcaps; 05-05-2013, 02:12 AM.
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        #4
        Re: Best mark/type/name...of electrotytic capacitors inquiry

        Originally posted by Ahakim View Post
        I'm ready to pay 10$ for just ONE 470 or 1000 micofarad/50 or 63v
        There is no need to jump to 50V or 63V for a 470uF or 1000uF cap.

        Just use quality caps like Panasonic FM/FR series in their "normal" voltage. For example, if the original cap was 1000uF 16V, get a Panasonic FR in 1000uF 16V.

        http://www.digikey.com/product-detai...398-ND/2433532
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          #5
          Re: Best mark/type...of electrotytic capacitors

          Also, if you are professional repair person, get an ESR meter.
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            #6
            Re: Best mark/type...of electrotytic capacitors

            I mostly used to use capxon or nichicon caps(availability). ESR measures are generally good before first use...They "bulge" after a few months!...
            Many thanks...
            Last edited by Ahakim; 05-05-2013, 11:51 PM.

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              #7
              Re: Best mark/type...of electrotytic capacitors

              capxon is the worst brand to have ever existed, if you get 2 years out of those you are lucky.

              Panasonic / nichicon / rubycon are 200x better then capxon, and if properly selected (right capacitance / series / voltage) will last more then 10 years in anything
              Fixed so far 12 lcd's , 1 plasmas, 5 monitors, 0 dlp's (plan to keep the dlps at 0). and 3 atx power supplies, and 2 motherboards.

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                #8
                Re: Best mark/type...of electrotytic capacitors

                Originally posted by Ahakim View Post
                I mostly used to use capxon or nichicon caps(availability).


                Capxon makes terrible terrible terrible quality caps.

                Now you know better. There is no excuse not to get Panasonic FC/FM/FR from reputable USA based distributors for your next projects.

                Budm has used thousands of them over several years with lots of success.

                https://www.badcaps.net/forum/showpo...5&postcount=20
                Last edited by retiredcaps; 05-06-2013, 12:28 AM.
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                  #9
                  Re: Best mark/type...of electrotytic capacitors

                  Good helpful advice...I got it! Thanks a lot.
                  Bye bye "Mr" Capxon!

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                    #10
                    Re: Best mark/type...of electrotytic capacitors

                    I prefer Chemi-Con KMQ (radial 160-450V and all snap-in voltages) and for low-ESR units, Chemi-Con KY (as my avatar shows at the time of posting) and KZM (or KZN if I can get them).
                    All of my electrolytic capacitor substitutions specify Chemi-Con units.
                    My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.

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