Film capacitor life rating

Today, customers asked the editors, asked us about the quality of the film capacitors, and how long the life was. After the editors answered the customer's thoughts, it was better to give everyone the knowledge of the life class of the film capacitor under the science and the factors that affected it, and how To improve the life of film capacitors.

First of all, let's understand what is the film capacitor: Film capacitor is a capacitor widely used in electronics, home appliances, communications, electricity, electrified railways, hybrid vehicles, wind power, solar power and many other industries, due to non-polarity, insulation The advantages of high impedance, excellent frequency characteristics, and small dielectric loss are favored by major manufacturers. According to the CQC standard, the capacitor grade is divided into ABCD4 grades, A grade is continuous operation 30,000 hours, B grade is 10000 hours, C grade is 3000 hours, D grade is 1000 hours.

The life of a film capacitor is affected by temperature and will decrease with increasing temperature. For example, a capacitor with a quality rating of Class C has a lifetime of 3000 hours. Under normal temperature (room temperature), it can work 3,000 hours or even longer. However, if its working temperature is at its extreme operating temperature, it may have only 500 hours of normal working time. And if the temperature exceeds its limit working temperature, it will not work properly, and it will be damaged. Therefore, if you want to extend the life of the film capacitor, let it work at a suitable temperature. I suggest that it should work between 20-30 degrees. Of course, please remember to buy capacitors made by regular manufacturers.