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    capacitor ripple vs endurance & other questions

    Hello, I have a few questions regarding some of the specifications found on capacitor datasheets.

    1.) Which specification of capacitors is more important, endurance or rated ripple? Nichicon HE capacitors have a higher endurance rating than HZ, so wouldn't they be better?

    2.) Not all data sheets list esr, so how can I tell what capacitor would be better than another one?

    3.) Nichicon HZ capacitors have a higher ripple rating than Rubycon MCZ capacitors, so would the nichicon HZ be better than the Rubycon in this case?

    4.) Also, what range would be considered a good esr reading, and what range would be considered bad?

    Thanks for taking the time to review my post!

    #2
    Re: capacitor ripple vs endurance & other questions

    Depends on application is the key. Endurance is for X hours @ rated temperature @ rated ripple & voltage. That is not a typical operating condition. Typical would be < 60% of temperature and weighed across the life of the cap. The number escapes me but it is exponential in value as to the increase in lifetime for each X degree decrease from rated maximum. A 2,000 hour 105°C cap running at 60°C could easily last 10 years or more.

    Impedance & ESR are essentially the same thing. Look for that instead. Again, application determines which cap is better suited.

    For their particular use, I would say yes ~tentatively~. Either would work fine in the same application. CPU VRM for instance.

    Again, application determines what is good vs. bad and what cap you are testing. You need the info on the original cap to determine good/bad.

    Read the forums. There are ~years~ of information. Start with the FAQ's and work out from there. Not everything is a quick answer.

    Cheers & Welcome!
    Toast
    veritas odium parit

    Comment


      #3
      Re: capacitor ripple vs endurance & other questions

      Hey thanks for replying!

      So even though endurance is not tested in a typical operating condition, wouldn't a capacitor rated at 4000 hours @ 105C be better than a capacitor rated at 2000 hours @ 105C? I've been repairing a few monitors & video cards lately using capacitors that I picked up at a local electronics store, but I want to start using the most reliable capacitors possible for my repairs (I was planning to buy some of the mcz and mbz rubycons from here, but rubycon doesn't make that line in the capacitance & rated voltage that I need & I wanted to see if I could find something better). Basically, I just wanted to know why most people here consider the Nichicon HZ capacitors to be better than the HE ones even though they have a longer life.
      Last edited by GameBooy2020; 08-19-2010, 06:05 AM.

      Comment


        #4
        Re: capacitor ripple vs endurance & other questions

        >>but rubycon doesn't make that line in the capacitance & rated voltage that I need<<

        ???

        Give some values so we can steer you in the right direction.

        >>using capacitors that I picked up at a local electronics store<<
        Specifics instead of "generalities" please. What you obtained may not be correct for the unit you're fixing.

        Toast
        veritas odium parit

        Comment


          #5
          Re: capacitor ripple vs endurance & other questions

          I apologize, here are the values of the capacitors that I need and the sizes as well:

          330 uf @ 16 V ----------- 8 x 12 mm
          1000 uf @ 6.3 V ---------- 10 x 12 mm
          1000 uf @ 10 V ---------- 10 x 16 mm
          470 uf @ 25 V ---------- 10 x 16 mm
          470 uf @ 10 V ----------- 8 x 11.5 mm
          1000 uf @ 16 V ------------ 10 x 20 mm
          Last edited by GameBooy2020; 08-19-2010, 06:53 AM.

          Comment


            #6
            Re: capacitor ripple vs endurance & other questions

            .
            Endurance "Lifetime" is the number of hours @ max rated temperature & @ max rated ripple [at the stated frequency] & @ max rated voltage that the cap can be subjected to - AND - still have ~all~ values within advertised specs when returned to nominal conditions.
            -
            In other words it's how long you can abuse the F**k out of it and cause zero damage.

            The Endurance value is of no PRACTICAL use because if you never operate the cap at those conditions that number is useless information.
            [ And if you -tried- to operate a mobo cap even close those conditions it wouldn't boot and some bits here and there might even melt. ]

            Some people think they can calculate an expected Lifetime from it but those equations are only accurate to within +/-40%.
            8 years +/-40% => 4.8 years to 11.2 years. [NOT useful information!]

            .
            Last edited by PCBONEZ; 08-19-2010, 08:09 AM.
            Mann-Made Global Warming.
            - We should be more concerned about the Intellectual Climate.

            -
            Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.

            - Dr Seuss
            -
            You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
            -

            Comment


              #7
              Re: capacitor ripple vs endurance & other questions

              Originally posted by GameBooy2020 View Post
              Hey thanks for replying!

              So even though endurance is not tested in a typical operating condition, wouldn't a capacitor rated at 4000 hours @ 105C be better than a capacitor rated at 2000 hours @ 105C?
              As I said, endurance tells you nothing useful about actual lifetime.

              For the explanation lets say all the caps other characteristic are the same such that the useful lifetime follows the endurance lifetime.

              As so:
              Cap 1 - 2000hr => 6 year useful lifetime
              Cap 2 - 4000hr => 12 year useful lifetime.

              But because of the +/-40% accuracy...
              6 years really means from 3.6 to 8.4 years and useful lifetime would be as expected.
              12 years really means from 7.2 to 16.8 years and useful lifetime would be as expected.

              Every single Cap 2 could fail at 7.2 years.
              Every single Cap 1 could last 8.4 years.

              Did the Endurance number help you? - NOPE!

              .
              Mann-Made Global Warming.
              - We should be more concerned about the Intellectual Climate.

              -
              Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.

              - Dr Seuss
              -
              You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
              -

              Comment


                #8
                Re: capacitor ripple vs endurance & other questions

                Originally posted by GameBooy2020 View Post
                I apologize, here are the values of the capacitors that I need and the sizes as well:

                330 uf @ 16 V ----------- 8 x 12 mm
                1000 uf @ 6.3 V ---------- 10 x 12 mm
                1000 uf @ 10 V ---------- 10 x 16 mm
                470 uf @ 25 V ---------- 10 x 16 mm
                470 uf @ 10 V ----------- 8 x 11.5 mm
                1000 uf @ 16 V ------------ 10 x 20 mm
                What make and series were the old ones?

                What is the application?

                .
                Mann-Made Global Warming.
                - We should be more concerned about the Intellectual Climate.

                -
                Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.

                - Dr Seuss
                -
                You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                -

                Comment


                  #9
                  Re: capacitor ripple vs endurance & other questions

                  I see, so endurance is practically useless, thanks for clearing that up for me.


                  here's a list of the old capacitors that I plan to replace:

                  brand -------- specs

                  elite PF ------ 1000uf @ 16V ( 10 x 20 mm)
                  capxon KF --- 1000uf @ 10V ( 10 x 16 mm)
                  capxon KF --- 470uf @ 10V ( 8 x 11.5 mm)
                  capxon KF --- 470uf @ 25V ( 10 x 16 mm)
                  skywell SHT - 1000uf @ 6.3V ( 10 x 12 mm (not sure about height since I could'nt find datasheet for SHT) )
                  Sacon FZ ---- 330uf @ 16V ( 8 x 12 mm)


                  The capxon's and the elite are from lcd monitor power supplies, and the skywell & sacon caps are from video cards (AGP).
                  Last edited by GameBooy2020; 08-19-2010, 10:26 AM. Reason: forgot to add application

                  Comment


                    #10
                    Re: capacitor ripple vs endurance & other questions

                    KF I replace with UCC LXZ or LXY
                    "We have offered them (the Arabs) a sensible way for so many years. But no, they wanted to fight. Fine! We gave them technology, the latest, the kind even Vietnam didn't have. They had double superiority in tanks and aircraft, triple in artillery, and in air defense and anti-tank weapons they had absolute supremacy. And what? Once again they were beaten. Once again they scrammed [sic]. Once again they screamed for us to come save them. Sadat woke me up in the middle of the night twice over the phone, 'Save me!' He demanded to send Soviet troops, and immediately! No! We are not going to fight for them."

                    -Leonid Brezhnev (On the Yom Kippur War)

                    Comment


                      #11
                      Re: capacitor ripple vs endurance & other questions

                      The ratings to look at beyond uF and volts are ESR and Ripple.
                      [Remember going up in volts isn't a problem.]

                      ESR is isn't really Impedance (Z) - but:
                      At the 100kHz they use for data sheets Xc and ESL are at values such that *effectively* ESR = Impedance.
                      The actual equation is:
                      Z² = ESR² + (XL - XC)²
                      [Note: (XL - XC) must be corrected to a positive value if it isn't.]
                      -
                      ESR is effectively a measure of the cap's 'resistance' to AC Ripple.
                      Since the cap's job is to short Ripple out to ground: lower is better.

                      The 'Ripple' rating tells you how much Ripple current the cap can pass without overheating internally.
                      It is the capacitor equivalent of a watt rating on a resistor.
                      It tells you how 'heavy duty' the cap is and thus: more[higher] is better.

                      elite PF ------ 1000uf @ 16V ( 10 x 20 mm) - General Purpose cap - Ripple = 680
                      Rubycon PX @16v is not rated good enough.[Ripple = 640]
                      I would use something like LXZ, LXY, VZ, FC, PW

                      Capxon KF --- 1000uf @ 10V ( 10 x 16 mm) 1040 / 0.076
                      Panasonic FC is just good enough for this one. [KF specs are not linear, so to speak.]
                      Use FC or better.

                      capxon KF --- 470uf @ 10V ( 8 x 11.5 mm) 580 / 0.250
                      capxon KF --- 470uf @ 25V ( 10 x 16 mm) 1200 / 0.076
                      These are rated better than FC.
                      Chemicon KY or Nichicon HE are good enough.
                      Chemicon KZE and Rubycon ZL are the next better grade.

                      Sacon FZ ---- 330uf @ 16V ( 8 x 12 mm) - 1150 / 0.036
                      Pannasonic FM is not good enough. [950 / 0.056]
                      Use Rubycon MBZ or MCZ - Panasonic FJ or FL - Sanyo WG.

                      skywell SHT - 1000uf @ 6.3V ( 10 x 12 mm (not sure about height since I could'nt find data sheet for SHT) )
                      I would treat this the same as the FZ to be safe since I can't find a spec sheet either.

                      .
                      Mann-Made Global Warming.
                      - We should be more concerned about the Intellectual Climate.

                      -
                      Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.

                      - Dr Seuss
                      -
                      You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                      -

                      Comment


                        #12
                        Re: capacitor ripple vs endurance & other questions

                        Thank you. This was very helpful. I've been struggling to understand why people recommend which series for what.

                        One question though. When are you recommending KZE and MBZ/MCZ?

                        This is the way I understand it. KZE and MBZ/MCZ are Low ESR and high ripple caps. So you use them in places where low ESR is required like a motherboard's VRM. Would you put KZE let's say on a power supply?
                        "We have offered them (the Arabs) a sensible way for so many years. But no, they wanted to fight. Fine! We gave them technology, the latest, the kind even Vietnam didn't have. They had double superiority in tanks and aircraft, triple in artillery, and in air defense and anti-tank weapons they had absolute supremacy. And what? Once again they were beaten. Once again they scrammed [sic]. Once again they screamed for us to come save them. Sadat woke me up in the middle of the night twice over the phone, 'Save me!' He demanded to send Soviet troops, and immediately! No! We are not going to fight for them."

                        -Leonid Brezhnev (On the Yom Kippur War)

                        Comment


                          #13
                          Re: capacitor ripple vs endurance & other questions

                          He's only posted that info ohhhh 50 times now......

                          There is also a chart PC did on replacements based on application and quality/ratings. Buried in another thread and posted within past year IIRC. If I find it, I'll put the link here.
                          veritas odium parit

                          Comment


                            #14
                            Re: capacitor ripple vs endurance & other questions

                            Here:

                            https://www.badcaps.net/forum/showpo...11&postcount=4

                            I did my own chart based on his info using only readily available caps from USA suppliers. No types that are N/A in US without extraordinary effort. Like Pana FJ or FL.
                            veritas odium parit

                            Comment


                              #15
                              Re: capacitor ripple vs endurance & other questions

                              Originally posted by mockingbird View Post
                              Thank you. This was very helpful. I've been struggling to understand why people recommend which series for what.

                              One question though. When are you recommending KZE and MBZ/MCZ?

                              This is the way I understand it. KZE and MBZ/MCZ are Low ESR and high ripple caps. So you use them in places where low ESR is required like a motherboard's VRM. Would you put KZE let's say on a power supply?
                              KZE is in fact intended for PSU according to Chemicon.

                              Looking at 8x20mm

                              MCZ: .................... 2350 / .012
                              FL & FJ: ................. 1870 / .016
                              MBZ & WG: ........... 1870 / .019
                              FM: ....................... 1560 / .030
                              KZE, ZL, WX, HD: . 1250 / .041
                              KY, HE: ................. 1050 / .069
                              FC, PW: .................. 995 / .065
                              LXZ: ....................... 810 / .080

                              The 10x20mm follow the same pattern.

                              In Vcore and RAM:
                              KZE was the typical grade on PC133 motherboards.
                              By DDR RAM MBZ was more typical.
                              - It varies with how many cap are used because caps in parallel lowers total circuit ESR.

                              KZE grade is still common for the 8 & 10 mm caps used out near the add-in slots when the board has 6 or more caps out there.
                              Low cap-count boards will use higher grades.

                              .
                              Mann-Made Global Warming.
                              - We should be more concerned about the Intellectual Climate.

                              -
                              Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.

                              - Dr Seuss
                              -
                              You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                              -

                              Comment


                                #16
                                Re: capacitor ripple vs endurance & other questions

                                Thank you. This was very helpful. I've been struggling to understand why people recommend which series for what.
                                Yeah same here, the information everyone has placed here has helped me alot. I finally understand what all of the values are and what they do now. Thanks guys!

                                Comment


                                  #17
                                  Re: capacitor ripple vs endurance & other questions

                                  WOW!! KZE is higher ESR than FM!!!! Is KZG any better? Sorry for not looking at the spec sheets myself, I don't understand how to calculate ESR from a spec sheet.
                                  "We have offered them (the Arabs) a sensible way for so many years. But no, they wanted to fight. Fine! We gave them technology, the latest, the kind even Vietnam didn't have. They had double superiority in tanks and aircraft, triple in artillery, and in air defense and anti-tank weapons they had absolute supremacy. And what? Once again they were beaten. Once again they scrammed [sic]. Once again they screamed for us to come save them. Sadat woke me up in the middle of the night twice over the phone, 'Save me!' He demanded to send Soviet troops, and immediately! No! We are not going to fight for them."

                                  -Leonid Brezhnev (On the Yom Kippur War)

                                  Comment


                                    #18
                                    Re: capacitor ripple vs endurance & other questions

                                    Originally posted by mockingbird View Post
                                    WOW!! KZE is higher ESR than FM!!!! Is KZG any better? Sorry for not looking at the spec sheets myself, I don't understand how to calculate ESR from a spec sheet.
                                    KZG is equivalent spec-wise to MBZ/WG. However, it's not recommended for recapping purposes has KZG is prone to failure.

                                    Comment


                                      #19
                                      Re: capacitor ripple vs endurance & other questions

                                      Originally posted by mockingbird View Post
                                      WOW!! KZE is higher ESR than FM!!!! Is KZG any better? Sorry for not looking at the spec sheets myself, I don't understand how to calculate ESR from a spec sheet.
                                      Calculate? There is no calculate. Just read the datasheets.
                                      veritas odium parit

                                      Comment


                                        #20
                                        Re: capacitor ripple vs endurance & other questions

                                        Here:
                                        Attached Files
                                        veritas odium parit

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