Ceramic capacitors are a type of passive electronic component used in various applications, including power supplies and filter circuits. They consist of two metal electrodes separated by an insulating ceramic material, which can be made from a variety of materials such as alumina or titanate. The properties of the ceramic material determine the capacitor's electrical characteristics, including its capacitance value, voltage rating, and frequency response. Ceramic capacitors are often used in applications where high reliability and stability are required due to their low-temperature coefficient and resistance to environmental factors like humidity and temperature changes.