Factors affecting capacitor life

Electrolytic capacitors are widely used in different fields of power electronics. The life of electrolytic capacitors depends on its internal temperature. Therefore, the design and application conditions of electrolytic capacitors will affect the life of electrolytic capacitors. From a design perspective, the design method of electrolytic capacitors, The material and processing technology determine the life and stability of the capacitor. For users, the operating voltage, ripple current, switching frequency, etc. will affect the life of electrolytic capacitors. Electrolytic capacitors will fail due to some factors, such as low temperature, high voltage, ambient temperature, etc. The service life of electrolytic capacitors is not only related to the ambient temperature, but also to the magnitude of the ripple current. Since thermal stress has a decisive influence on the service life of electrolytic capacitors, the heat loss caused by ripple current is an important factor affecting the service life of electrolytic capacitors.