Various Types of Decoupling Capacitors

There are various types of capacitors suitable for decoupling, but each differ by electrical performance, polarity and cost. The following are some common capacitor tips which may help you to select the right type of decoupling in your application.


Capacitor Types Advantages Disadvantages Application Examples
Ceramic Capacitor Lower ESR and ESL Capacitance range is limited Good at high frequency applications
Cost effective solution Capacitance decreases related to the voltage and temperaure coefficient
Aluminum Electrolytic Capacitor High capacitance Degrade over time and temperaturewearout Consumer Products, Large bulk storage
Low cost High ESR and Large Size
Aluminum Polymer Capacitor Very Low ESR Rapid degradation aboce 105⁰C CPU core regulators
Relatively small case Relatively high cost
Tantalum Capacitor Low ESR and ESL Fire hazard in reverse voltage Popular in military
Very stable over time Limited rated voltage of 50V

Here’s a few related articles that can help you better understand to select and apply decoupling capacitor:
Kemet article: Don’t Choose the Wrong Decoupling Capacitor

I’m looking for the best AC coupling capacitors suitable for 70GHz high speed clock inputs.