The CAP CER 18PF 50V 0805 EPOXY is a specific type of ceramic capacitor. It has an capacitance value of 18 pico Farads and can withstand a maximum voltage of 50 volts. This component measures 0805, which is a common metric size for surface mount components, and is made with an epoxy coating. The C0G designation refers to the temperature compensation characteristics of this capacitor, where "C" stands for ceramic and "0G" indicates that it has near zero temperature coefficient over a wide range of temperatures.