The first thing to pay attention to when choosing a chip capacitor is its temperature characteristics. The temperature characteristics of different materials are very different.
C0G belongs to a class of dielectrics with the most stable electrical properties and basically does not change with changes in temperature, voltage and time, and is suitable for high-frequency circuits that require high stability.

X7R is a Class II dielectric with relatively stable electrical performance, and its performance does not change significantly when temperature, voltage and time change. It is suitable for DC isolation, coupling, bypass and frequency discrimination circuits that do not require high capacity stability. Since X7R is a strong dielectric, it is possible to make capacitors with larger capacity than C0G dielectrics.
Y5V is a second-class dielectric with high dielectric constant. It is often used in the production of large-capacity capacitors with larger specific capacity and higher nominal capacity, but its capacity stability is worse than that of X7R. Other test conditions are more sensitive.
When selecting models, if the requirements for operating temperature and temperature coefficient are very low, Y5V can be considered, but X7R is generally used, and C0G must be selected when the requirements are higher.