Products FAQs
Selected Category：Aluminum Electrolytic Capacitors > Judicious Use
Our PSG series of conductive polymer aluminum solid capacitors are used in the reference designs of evaluation boards for 12V/1200W high-frequency LLC converters produced by Transphorm.
The following is an explanation of the precautions associated with using aluminum electrolytic capacitors in devices that will be used at high-altitude, including in mountainous regions and on airplanes.
Aluminum electrolytic capacitors are products with polarity. These products cannot be used with a voltage or current that is the opposite direction of the polarity.
Unlike MLCC, aluminum electrolytic capacitors do not have bias properties and capacitance does not depend on the applied voltage value. This is a merit provided by aluminum electrolytic capacitors.
Aluminum electrolytic capacitors have surge voltage ratings that exceed their rated voltage. Our rating of surge voltage is compliant with JIS standards.
Typical aluminum electrolytic capacitors cannot be used on circuits that repeatedly charge and discharge.
We recommend you use product designed specifically for your intended purpose.
Where a capacitor is once charged and discharged with both of the terminals short-circuiting and then left the terminals open for a while, a voltage across the capacitor spontaneously increases again.
Some characteristics of an aluminum electrolytic capacitor are temperature-dependent. The higher the temperature is, the more deteriorated the capacitor will be. An increase in temperature accelerates the increase in leakage current and tanδ and the decrease in capacitance.
Tips for Selecting Capacitors Appropriate for Individual Applications
Aluminum electrolytic capacitors are used mainly for the filtering application of power supplies. Select appropriate capacitors for the specific requirements of each application, referring to the following examples for typical applications
Aluminum electrolytic capacitors are sensitive to contamination of halogen ions (especially to chlorine and bromine ions) though the degree of the effect depends on the properties of the electrolyte and/or sealing materials used in the capacitors. For using a halide-containing flux, solvent (cleaning agent, adhesive or coating materials) or fumigant, the halide may penetrate into the capacitor through the rubber seal materials and cause the following corrosion reactions to occur.
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