There are many different types and shapes of capacitors, including ceramic capacitors, aluminum electrolytic capacitors, three-layer ceramic capacitors, poly/metal/high voltage electrolytic capacitors and tantalum electrolytic capacitors. The choice of capacitor should consider the applied voltage, temperature, environment and capacitance value.
Capacitors also have many uses, such as power supply, amplifier, filter, isolator, timer, trigger, switching power supply, DC-DC converter and other electronic circuits. In addition, capacitors are also widely used in AC circuits, lightning protection, medical devices, computer equipment, household appliances and automotive electronics.