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Question smd ceramic capacitor

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tiago1986:
Do small portable electronic devices that use ceramic or tantalum SMD capacitors also need to be used constantly because they have the same problems as long-term stored electrolytic capacitors?

wraper:
No. Electrolytic capacitors should be powered once in a while to prevent insulating aluminum oxide layer from thinning, which may cause excessive leakage current when the voltage is applied after long period without voltage applied. There is no such degradation process with other types of capacitors.

tiago1986:
in electrolytic capacitors after how long stored does it need to be powered? varies a lot from brand, age of the electrolytic capacitor (beginning of the 90's) and soldered in electronic circuit?

the same is not necessary in ceramic smd, tantalum, polyester

wraper:

--- Quote from: tiago1986 on November 25, 2021, 02:07:11 pm ---in electrolytic capacitors after how long stored does it need to be powered? varies a lot from brand, age of the electrolytic capacitor (beginning of the 90's) and soldered in electronic circuit?

the same is not necessary in ceramic smd, tantalum, polyester

--- End quote ---
There is no fixed time, and you won't be able to tell from a datasheet how fast they will degrade. If you power for a few hours in a year or two, they should be fine.

tiago1986:
normally I turn them on 1 hour is enough for the total reform of the electrolytic capacitor? I don't know if I use them every month to reduce failures in electrolytic capacitors from the 90's and mounted in electronic circuit

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