Selected Category：Aluminum Electrolytic Capacitors
The larger the surface area of an electrode is, the higher the capacitance (capacity for storing electricity) is. For aluminum electrolytic capacitors
When a capacitor is applied with a voltage with the frequency changed, the impedance (Z), a factor of preventing the AC current changes as shown in (Fig. 14). This is the impedance-frequency characteristics of the capacitor.
The lifetime of aluminum electrolytic capacitors is largely dependent on the application conditions. Environmental factors include temperature, humidity, atmospheric pressure and vibrations. Electrical factors include operating voltage, ripple current and chargedischarge.
For designing the device with aluminum electrolytic capacitors, a failure rate and useful life are necessary to be considered for their reliability.
Capacitors are passive components. Among the various kinds of capacitors, aluminum electrolytic capacitors offer larger CV product per case size and lower cost than the others.
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.
Aluminum electrolytic and conductive polymer hybrid aluminum electrolytic capacitors feature a pressure valve to prevent dangerous ruptures in the event of an abnormal voltage or abnormal heat stress. Make sure to leave the specified amount of space above the capacitor to prevent any interference to pressure valve operation.
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