old and new electronic devices prevents fails aluminum electrolytic capacitors - Page 1
Forum section: electronics / repair

author: lucasmm88
author_rank: Newbie
timestamp: January 04, 2025, 07:04:02 pm
content: What recommendations on how to prevent deformation of the dielectric layers in aluminum electrolytic capacitors from my collection stored electronic devices that were manufactured in the early 90s and early 2000s and store in my home at a temperature of 33-36C, humidity 57-67% and energized devices at 220v AC 60hz?

author: Gyro
author_rank: Super Contributor
timestamp: January 04, 2025, 07:24:48 pm
content: Quote from: lucasmm88 on January 04, 2025, 07:04:02 pmI think tiago1986 / classicsamus87 etc, etc is back in town. Reported.

author: Simon
author_rank: Unknown
timestamp: January 04, 2025, 09:37:37 pm
content: Quote from: lucasmm88 on January 04, 2025, 07:04:02 pmabsolutely none! turn them on, if they don't work leccy capacitors are the first things to fail component wise and can be replaced.

author: Gyro
author_rank: Super Contributor
timestamp: January 04, 2025, 10:17:42 pm
content: https://www.eevblog.com/forum/general-computing/doubts-dvd-drive-of-pc/msg3423498/#msg3423498e.g.https://www.eevblog.com/forum/chat/electrolytic-capacitor-new-x-electrolytic-capacitor-used-differences-age/

author: lucasmm88
author_rank: Newbie
timestamp: January 05, 2025, 12:06:23 pm
content: i have question in my conditions storage cited above for temperature, humidity, age my devices stored for interval repeat procedure energize devices for prevent fails aluminum electrolytic capacitors caused for disusehere is 220v 60hz AC

author: Haenk
author_rank: Super Contributor
timestamp: January 05, 2025, 01:18:41 pm
content: For long term storage, use some moisture-proof sealed bags (usually metal coated thick plastic bags) or containers, add desiccant (silica gel bag) and seal them for good. That's not cheap, but prevent a lot of corrosion. Remove any batteries before storage. Fix issues *after* storage.Of course this only makes sense for valuable items.

author: Simon
author_rank: Unknown
timestamp: January 06, 2025, 08:23:21 pm
content: Quote from: lucasmm88 on January 05, 2025, 12:06:23 pmAs you have been told already, electrolytic capacitors fail, end of. If you device is old and not working. Change them, nothing more to be said!

author: lucasmm88
author_rank: Newbie
timestamp: January 07, 2025, 10:43:13 am
content: the devices is working correctly, I just need to find a good interval to re-energize all electronic devices to prevent failures due to disuse in the aluminum electrolytic capacitors in my storage conditions, humidity and temperature mentioned.

author: TERRA Operative
author_rank: Super Contributor
timestamp: January 07, 2025, 11:25:16 am
content: Whenever you feel like it, turn the power on for a bit.Or consult the datasheets, if they are a good brand, there will be lifetime information with formulas to use to calculate expected lifetime.

author: Gyro
author_rank: Super Contributor
timestamp: January 07, 2025, 01:05:50 pm
content: Quote from: lucasmm88 on January 07, 2025, 10:43:13 amWill you never tire of asking this question, in so many of your banned identities and various forums? You have received many, many answers over the years.

author: lucasmm88
author_rank: Newbie
timestamp: January 07, 2025, 01:15:04 pm
content: In the other questions I made a mistake and did not mention my storage conditions for the devices humidity and temperature

author: Gyro
author_rank: Super Contributor
timestamp: January 07, 2025, 01:22:30 pm
content: In previous answers, you have been told to consult capacitor manufacturers' [Edit:datasheetsdocumentation], if these don't give the required MTBF information then there is nothing else. Mains voltage and frequency are completely irrelevant. There is, and never will be, a blanket answer so stop asking!There is absolutelynothingmore to be said, no matter how many times you ask or however many identities you create!

author: squadchannel
author_rank: Frequent Contributor
timestamp: January 07, 2025, 01:24:57 pm
content: let's answer this seriously.Nichicon's technical note says this.It's in Japanese; let's translate it with Deepl.in pages 17.https://www.nichicon.co.jp/series_items/catalog_pdf/ja/pdf/xja043/aluminum.pdfQuoteQuote

author: lucasmm88
author_rank: Newbie
timestamp: January 07, 2025, 03:23:19 pm
content: This procedure is quite complex. I would need a resistor and to open all my electronic devices, unsolder the aluminum electrolytic capacitors, repair, resolder the aluminum electrolytic capacitors and close all the electronic devices. He does not mention whether this recommendation works only for new aluminum electrolytic capacitors that have been used very little or whether it covers all of them, even those manufactured in the early 90s and early 2000s. He does not mention the humidity they can withstand. I do not know if age, temperature and humidity change the greater or lesser interval to energize all aluminum electrolytic capacitors assembled in an electronic circuit or separately. He mentions a maximum temperature of 35°C. Here at home it sometimes goes to 36°C.I have asked several times to the manufacturers of aluminum electrolytic capacitors, I have done this with several brands but they have never answered my emails.

author: Haenk
author_rank: Super Contributor
timestamp: January 07, 2025, 04:10:39 pm
content: Please close this thread; this "discussion" leads nowhere.Final note from me: All the durability numbers are based on statistics aka "large numbers". One, five or fifty devices do not fall under "statistical evidence", but under "random event". So it is pointless to ponder about the average shelf life at 35oC vs. the average shelf life at 36oC.Store away dry to provent rust/oxidation. Fix, when taken out of storage and failing.EOM