Views: 6 Author: Site Editor Publish Time: 2024-12-12 Origin: Site
The development of science and technology has driven the progress of the times and also produced electronic components and electronic equipment. Electronic components are indispensable parts of electronic equipment, and many functions of electronic equipment also rely on electronic components.
In addition to the well-known electronic components such as transistors, batteries, relays, etc., there are also unfamiliar electronic components such as capacitors, resistors, inductors, etc. Among electronic components, film capacitors are used in various electronic products due to their characteristics.
Film capacitors are capacitors made of metallized film as dielectric. They play an important role in electronic equipment because of their non-polarity, small size, good stability, excellent frequency characteristics, small dielectric loss and good electrical performance.
As an important member of electronic components, film capacitors are widely used in various circuit systems. The stability and reliability of their performance are directly related to the working state of the entire circuit.
In practical applications, it is often encountered that the voltage in the circuit exceeds the rated voltage of the film capacitor. So, will the film capacitor be damaged if it exceeds the rated voltage?
Before answering, let's first understand what the rated voltage of a film capacitor is. The rated voltage of a film capacitor refers to the peak value of the DC voltage or the peak value of the pulse voltage that can be continuously applied to the capacitor at any temperature between the lower limit category temperature and the rated temperature.That is to say, within the allowable operating temperature range, the DC peak value or pulse voltage peak value on both sides of the capacitor cannot exceed its rated voltage.
Therefore, when producing film capacitors, manufacturers will leave a margin for the rated working voltage. Even if the rated working voltage is exceeded, the film capacitor will not be damaged. However, in the long run, the edible working time of the film capacitor will be reduced.
Why do manufacturers leave a margin? Will this be a waste?
This is because the rated voltage tends to decrease as the temperature rises. In order to ensure the normal use of the capacitor, a margin should be left when selecting. Film capacitors that exceed the rated voltage do have the risk of damage.
Therefore, during use, its operating voltage must be strictly controlled, the appropriate film capacitor model and specifications must be selected, and maintenance work must be done well.