Ceramic capacitors are a general term for capacitors with ceramic materials as the dielectric. There are many varieties, and the dimensions vary greatly. According to the use voltage of ceramic capacitors, it can be divided into high voltage, medium voltage and low voltage ceramic capacitors. According to the temperature coefficient, the dielectric constant can be divided into negative temperature coefficient, positive temperature coefficient, zero temperature coefficient, high dielectric constant, low dielectric constant and so on. In addition, there are classification methods for type I, type II, and type III.
Compared with other capacitors, general ceramic capacitors have the advantages of higher operating temperature, large specific capacitance, good moisture resistance, small dielectric loss, and the capacitance temperature coefficient can be selected in a wide range. This article will talk about the frequency characteristics of popular ceramic capacitors.
Frequency Characteristics of Ceramic Capacitors
The frequency characteristic of ceramic capacitors refers to the relationship between the capacitance and other parameters of the capacitor with frequency. Generally speaking, when the capacitor works at high frequency, with the increase of the operating frequency, due to the decrease in the dielectric coefficient of the insulating medium, the capacitance will decrease, while losses will increase and affect the capacitor’s parameters.
In order to ensure the stability of ceramic capacitors, the operating frequency of the capacitor should generally be selected at 1/3-1/2 of the natural resonant frequency of the capacitor. Capacitance and frequency are inseparable, and the relationship is very close. High-voltage ceramic capacitors with large capacitance have poor response to high frequencies but good response to low frequencies. On the other hand, ceramic capacitors with small size and capacitance have poor response to low frequency and good response to high frequency.
After reading the above content, you may have some understanding of the frequency characteristics of ceramic capacitors. More ceramic capacitor information can be found on our official website. JYH HSU(JEC) Electronics Ltd (or Dongguan Zhixu Electronic Co., Ltd.) has a full range of varistor and capacitor models with guaranteed quality. JEC has passed ISO9001:2015 quality management system certification; JEC safety capacitors (X capacitors and Y capacitors) and varistors have passed national certifications of the main industrial powers across the world; JEC ceramic capacitors, film capacitors and super capacitors are in compliance with environmental protection indicators.
Post time: May-30-2022