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gamer87
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How many days can I store unused electrolytic capacitors without electrical voltage but that this electrolytic capacitor does not present problems due to non-use and depolarization?
Tom.G said:From pg29 section 7.3.2 Storage conditions of:
https://www.tdk-electronics.tdk.com/download/185386/6ad5ed9e1ff4f727c328cb92da2adf2b/pdf-generaltechnicalinformation.pdf
If not otherwise specified, our aluminum electrolytic capacitors can be stored voltage-free above stated conditions (from +5 °Cto+35°C, relative humidity ≤ 75%) for at least two years;
You might also be interested in section 10 Maintenance on pg 31.
(Take note that this is from one of the higher quality suppliers.)
Cheers,
Tom
I'm having trouble parsing your post.gamer87 said:Does this rule apply to electrolytic capacitors mounted on electronic systems and with 30 years of life and use?
does this two-year rule not apply to any manufacturer's electrolytic capacitors?
gamer87 said:I have electronic devices from 1990 with electrolytic capacitors but I have no resistor and I have nothing to apply low voltage, what is the recommendation?
We are confused by your posts as well, but we will still try to do the best we can to help you.gamer87 said:i am confused my doubt
OK, but some things in life are confusing. Like the lifetime of electrolytic caps. I'm confused too. You may know more about this than all of the people out there that never wondered or aren't confused.gamer87 said:i am confused my doubt
When I'm doing a restore that has electrolytic capacitors, I replace all of them. The electrolyte does dry up as others have mentioned.berkeman said:We are confused by your posts as well, but we will still try to do the best we can to help you.
Are you trying to restore old electronic devices to operation? Replacing old electrolytic capacitors is one of the main ways that this type of restoration is done. Are these old devices not working?
@dlgoff is our local expert in old electronic / electrical device restoration...
https://en.wikipedia.org/wiki/Capac...n_non-solid_aluminium_electrolytic_capacitorsgamer87 said:What happens to the chemistry of the electrolytic capacitor if it remains unused for more years? Are used electrolytic capacitors manufactured in 1990 totally different in the chemistry of off-the-shelf electrolytic capacitors?
gamer87 said:What happens to the chemistry of the electrolytic capacitor if it remains unused for more years? Are used electrolytic capacitors manufactured in 1990 totally different in the chemistry of off-the-shelf electrolytic capacitors?
I'm no expert in electrolytic caps, but my impression is just that a part of it evaporates out of the caps over time. It's probably not cost effective to hermetically seal those caps, so the plastic layers that are used apparently are slightly permeable to the drying out process.dlgoff said:
For this old 1920's Universal radio I'm restoring, it's been quite costly. 11 of the 17 electrolytic capacitors needed is costing ~$110,dlgoff said:When I'm doing a restore that has electrolytic capacitors, I replace all of them. The electrolyte does dry up as others have mentioned.
Good luck
An electrolytic capacitor is a type of capacitor that uses an electrolyte solution to store and release electrical energy. It typically consists of two conductive plates separated by an electrolyte-soaked paper or polymer film. This type of capacitor is commonly used in electronic circuits due to its high capacitance and ability to handle large amounts of voltage.
When a voltage is applied to an electrolytic capacitor, the electrolyte solution allows for the build-up of an electrical charge on the conductive plates. This charge is stored in the form of an electric field between the plates. When the capacitor is connected in a circuit, it can release this stored energy as needed.
Electrolytic capacitors have a high capacitance, meaning they can store a large amount of charge in a small space. They also have a low cost and are readily available, making them a popular choice in electronic circuits. Additionally, they can handle high voltages and have a long lifespan when used within their specified limits.
One limitation of electrolytic capacitors is that they have a polarized design, meaning they can only be connected in a circuit in a specific direction. If connected incorrectly, they can fail or even explode. They also have a higher leakage current compared to other types of capacitors, which can affect their performance in certain applications.
When choosing an electrolytic capacitor, you should consider factors such as capacitance, voltage rating, and temperature range. It is important to select a capacitor with a capacitance that meets the requirements of your circuit, and a voltage rating that can handle the maximum voltage in your circuit. Additionally, consider the operating temperature range of your project and choose a capacitor that can withstand those conditions. It is always best to consult a datasheet or seek advice from a knowledgeable source when selecting the right electrolytic capacitor for your project.