Life Estimation of Multilayer Ceramic Capacitors

Electronic components, especially capacitors, have been used more and more widely, and there are more and more tests to be faced, such as physical fall, environmental temperature and humidity, chemical corrosion, current and voltage instability, etc. Affected by various factors, capacitors are tested, faults increase, and life is reduced. Therefore, estimating the life of a multilayer ceramic capacitor and replacing it in time before the end of its life can avoid many failures and accidents.

In general, a multilayer ceramic capacitor is composed of a dielectric material and has extremely high reliability. At the time of use, the temperature of the surrounding environment will increase, and atomic-level charge defects with little internal content in the ceramic material will move from the positive electrode to the negative electrode, and the crystal structure contains a very small amount of oxygen vacancies. It can be seen that the lifetime of the multilayer ceramic capacitor is determined by the moving speed and amount of oxygen vacancies in the ceramic material. We should take the ambient temperature and load voltage of the product as parameters.

The above is the method for estimating the life of multilayer ceramic capacitors, but it should be noted that this is only an estimate. Actual life will be affected by many aspects, so it can only be used as a reference.