Power capacitors are used in various circuits as energy-storage devices. In addition, they can also be used as electronic filters, being used to differentiate high and low frequencies. Capacitors can be manufactured to serve any purpose, from the smallest power capacitor in your remote control to a super power capacitor that can power electric and hybrid cars. NASA even uses glass capacitors to help deploy space probes.
Power capacitors consist of two conducting plates separated by an insulating material called the dielectric. Multilayer dielectrics provide excellent temperature stability and frequency characteristics, but single layer dielectrics are also available. Selecting power capacitors requires an analysis of dielectric materials and generally depends on what type of voltage the device can withstand.
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