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All electrolytic capacitors are polarized capacitors whose anode electrode (+) are made of a special metal on which an insulating oxide layer originates by anodization (forming), which acts as the dielectric of the electrolytic capacitor.

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9y ago
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13y ago

An electrolytic capacitor is a capacitor that is built using a special electrolyte as the insulator between the plates. By doing this, you can make the spacing very, very small and thus raise the the capacitance into the thousands of microfarads, making them especially suitable for power supply use. Unfortunately, the design only allows charge to be built up in one direction only, hence they have a designated PLUS terminal, which cannot be allowed to go negative without destroying the capacitor. Additionally, the electrolyte needs to be reformed from time to time, by imposing a charge on it and allowing it to bleed off. Normal use will suffice, but if the device sits unused for a long period of time, it can fail on first use unless reforming steps are taken.

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Q: What is electrolytic capacitor?
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