What is the large capacity of ceramic capacitors?

Ceramic capacitors are capacitors whose dielectric material is ceramic. According to the ceramic materials, they can be classified into high permittivity type and temperature compensating type. Classified by structure, it can be divided into wafer capacitor, tubular capacitor, rectangular capacitor, chip capacitor, feed-through ceramic capacitor and so on.

The larger the capacitor size, the larger the capacity. The capacity unit of the capacitor is F, and the basic units are pF, nF and uF. The amount of charge stored in the capacitor is "capacity x voltage". This voltage refers to the withstand voltage value, which is how many volts the capacitor can charge. The amount of electricity is proportional to the capacitance, proportional to the voltage, and proportional to the volume.

Generally, the starting capacity of ceramic capacitors is 0.5pF, and the size and capacity of the ceramic chips are different. The commonly used 0402 capacitance is 10uF, and the 0805 capacity is 47uF. With a large capacity of up to 100 UF, for example, a Japanese company has successfully developed large-capacity ceramic capacitors with a capacity of 100 μF and a high withstand voltage of 25 V. This product can be used for the power circuit of liquid crystal displays.

Optional capacitors can not only choose large capacity, you should choose the appropriate ones, for example, 0402 capacitors can achieve 10uF10V, 0805 capacitors can achieve 47uF10V, but for the convenience of procurement, low cost, it is generally recommended to select 0402 4.7uF, 0603 select 10uF, 0805 Choose 22uF. Therefore, we must choose the right capacitor in combination with our own circuit requirements, and do not blindly choose large-capacity capacitors.

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