Capacitor life....

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Baron
    Member
    • Sep 2006
    • 24
    #1

    Capacitor life....

    Just curious as to the life of capacitors.
    I know that is a bit of a 'how long is a bit of string' type question, but for example, in my Corsair 620W it has a Hitachi capacitor (at least the reviews show that) and apart from all the other components, I just wondered what its life expectancy is ?
    The unit does have a 5 year warranty, would it be near the end of its life by then anyway ?
    Thanks...
    Tt Armor+ black case--Corsair HX1050--Intel i7 920 (default)+Noctua U12-Gigabyte GA-58EX-Extreme--6GB tri-ch. Corsair Dominator+ Corsair Dominator memory cooler--2 X Gigabyte 6870OC CF -2 x 300GB WD V-Raptors--1 X 500GB WD Green--1 x WD 250GB--1 X 1TB Samsung F3--8 case fans--Samsung T220 22" + Dell WFP2408 24"--Logitech G15 keyboard-Logitech G500 mouse--Onboard sound--plus other bits.
    OS-Vista-64bit+Win7-64bit+Win 8 64bit.
    Tags: None
    • gonzo0815
      Badcaps Legend
      • Feb 2006
      • 1600
      #2
      Re: Capacitor life....

      Noome can tell you how lon a unknown cap will survie. There are caps with 1000h till some with 100 000h of live. You should at least tell the voltage, the series and capacitance. Than someone can give you a rough number. If you give the ambient temperature inside the psu too, there are some exact formulas to calculate the lifespann of the cap. Any way, considering that it is probably the lowest usuable lifspann caps i can immagine from a good brand i think it is at least 2000h 105°c rated. If ambbient temp in PSU is abouth 45°c it should be good beyond 1280000h or abouth 14 years of 24/7 use. So i guess they should surpase the warrantly easily. But remeber, any 10°c higher ambient temp in the psu will half the lifespann.....tus if caps are getting hot, the usuable live can easily drop beyond a year, no mather of good or bad brand.

        Comment

        • Baron
          Member
          • Sep 2006
          • 24
          #3
          Re: Capacitor life....

          Many thanks for taking the time to reply and explain things........
          According to the reviews, the primary is a 470uF 400V Hitachi AIC.
          which I gather is a good make and rated at 105C, and the secondary caps are Nippon-Chemicon, so the innards of this PSU appear to be high quality, and I believe its rating is at 50C.
          So, the caps have a good life expectancy, and the unit should/will outlive the 5 year warranty......thanks for cheering me up
          Tt Armor+ black case--Corsair HX1050--Intel i7 920 (default)+Noctua U12-Gigabyte GA-58EX-Extreme--6GB tri-ch. Corsair Dominator+ Corsair Dominator memory cooler--2 X Gigabyte 6870OC CF -2 x 300GB WD V-Raptors--1 X 500GB WD Green--1 x WD 250GB--1 X 1TB Samsung F3--8 case fans--Samsung T220 22" + Dell WFP2408 24"--Logitech G15 keyboard-Logitech G500 mouse--Onboard sound--plus other bits.
          OS-Vista-64bit+Win7-64bit+Win 8 64bit.

            Comment

            • arneson
              Badcaps Legend
              • Sep 2005
              • 1267
              #4
              Re: Capacitor life....

              I like that outlook. After all, even the Mars Rovers are still going.
              How many caps do you think they have? I'll take a guess and say 1000 caps per rover.
              Make an interesting query for ASK.
              Jim

                Comment

                • yanz
                  Badcaps Veteran
                  • Nov 2004
                  • 910
                  #5
                  Re: Capacitor life....

                  I just want to add,

                  There are life estimation formula of the aluminum electrolytic capacitors. If you care to do the math, this is document that might interest you:



                  in quote:

                  The life of the aluminum electrolytic capacitor is influenced by an ambient temperature, a ripple current, and an applied voltage. Especially, the ambient temperature and the ripple current are the main factors that causes wear-out failure. Applied voltage does not influence life time too much if an applied voltage to the aluminum electrolytic capacitor is below0.9x the rated voltage.but can be a factor of sudden failure.


                  This is applyed to panasonic's high voltage capacitor (from 160V to 550V):



                  But remeber, any 10°c higher ambient temp in the psu will half the lifespann.....
                  I was expecting a 2x lifespann if temp decrease every 10C, but there is a "multiplier" coeficient.

                  Maybe for lower voltage capacitor, there is another different calculation..
                  Attached Files
                  days are so short when you actually do something..

                    Comment

                    • yanz
                      Badcaps Veteran
                      • Nov 2004
                      • 910
                      #6
                      Re: Capacitor life....

                      I think the big primary caps have way lower temp than those small ones on the secondary/output.
                      days are so short when you actually do something..

                        Comment

                        • kc8adu
                          Super Moderator
                          • Nov 2003
                          • 8832
                          • U.S.A!
                          #7
                          Re: Capacitor life....

                          Originally posted by arneson
                          I like that outlook. After all, even the Mars Rovers are still going.
                          How many caps do you think they have? I'll take a guess and say 1000 caps per rover.
                          Make an interesting query for ASK.
                          i really doubt you will find a single lytic in anything space rated.

                            Comment

                            • japlytic
                              Badcaps Legend
                              • Oct 2005
                              • 2086
                              • Australia
                              #8
                              Re: Capacitor life....

                              I am still wondering why photo flash capacitors have a certain number of charge/discharge cycles, just like rechargable batteries.
                              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.

                                Comment

                                Previous template Next

                                Related Topics

                                Collapse
                                • Prolog
                                  RTX 3080 FE Identifying capacitor
                                  by Prolog
                                  Hi people, I hope this is the correct spot to post this, I'm new to the forum.

                                  I have an RTX 3080 Founders Edition which has a burnt up capacitor (it was in parallel with another capacitor which appears damaged too), so I am hoping to be able to identify the capacitor values and order replacements.

                                  I hope these photos make it clear which component I am referring to:
                                  (yes, the soldering is a bit botched from removing the blown one, I know)

                                  I have found the board schematic (attached), but there does not seem to be a boardview available. I have never...
                                  12-01-2024, 08:27 PM
                                • chth96
                                  If I replace with inferior capacitor, Is it No harm to other IC components at all?
                                  by chth96
                                  I replaced some capacitor which is located on optical pickup pcb which is shown in the table below(PCB #2).Because it have been out of order.
                                  Now,It works very well,But I just have found that all caps (6svpc100my and other part number as well) ,which is shown in the table below, has ultra-high ripple current spec.
                                  It is not able to obtain any capacitor which can be a substitute for this ultra-high ripple current nichicon capacitor.
                                  So I replaced it with samxon and rubycon's general capacitor(GP,YXA series).
                                  I know that these capacitor will not last as long as nichicon capacitor...
                                  12-22-2023, 04:34 AM
                                • slybunda
                                  Capacitor shelf life or expiry date?
                                  by slybunda
                                  do capacitors have a limited life even if just kept in a box in storage?
                                  11-20-2023, 02:23 AM
                                • chth96
                                  How can I test non-polarized capacitor?
                                  by chth96
                                  I desoldered samwha NF capacitor(50v 5.6uf) from PCB circuit of 29inch CRT TV which have symptoms of no display after I heard sound of inrush of current to TV whenever I switch on this television.
                                  I measured ESR value of this non-polarized capacitor(samwha NF capacitor 50v 5.6uf) by means of MESR-100 ESR meter and It displayed 0.3 ohm

                                  And When I measured its capacitance with digital multimeter and LCR-T4 Mega328 meter, It displayed 10uf from DMM and 8uf from LCR-T4 meter.
                                  I found catalogue of samwha capacitor(samwha-catalogue_3.pdf file), which is attached to this thread,...
                                  06-02-2024, 07:31 PM
                                • chth96
                                  Is it no harm to replace with capacitor without ripple current rating?
                                  by chth96
                                  When I tried to repair LG 29 inch CRT TV, I found that the ESR value of samyoung SMS capacitor(160v 2.2uf), which is very close to D1879 transistor, is 6 ohm.


                                  Judging from above ESR Meter Table,I think It is necessary to replace this sms capacitor.So I visited local electronics shop,and I purchased 160v 2.2uf rubycon YK capacitor.
                                  But when I browse through rubycon YK datasheet,I found that there is no ripple current rating for 160v 2.2uf specification. But On the contrary, I found 39 mA ripple current rating for 160v 2.2uf SMS capacitor.
                                  Rubycon YK DataSheet (b...
                                  04-19-2024, 05:19 AM
                                • Loading...
                                • No more items.
                                Working...