How to avoid the failure of metal film capacitors

Metallized film capacitors are distinguished by their excellent temperature characteristics and high capacity density, but incorrect use can lead to burning and bursting, leading to devastating results. Therefore, high reliability is established under strict conditions of use, and at the same time, the product quality is excellent. The following method avoids the above problems with metallized film capacitors.

1. Choose a good quality product. If the metallized film capacitor is not reliable, the reliability is very low and it is very easy to fail. Therefore, choosing the right and appropriate product is the primary condition for ensuring reliability. A poor quality metallized film capacitor can cause problems if it is mounted on a circuit. If the quality of the selected product is not guaranteed, it is not recommended to use metallized film capacitors, especially in DC-DC circuits and high-power charge and discharge circuits.

2. Low impedance circuits use failures caused by excessive voltage. The circuit used in the metallized film capacitor has a resistor-protected circuit and a low-impedance circuit without resistance protection. The circuit has a resistor protection, and the resistor acts to lower the voltage and suppress the passage of a large current.

3. There is no problem in circuit design and product selection. The performance parameters of metallized film capacitor can meet the circuit signal characteristics. However, there is no guarantee that the above two tasks are done in a good position, so various failure problems are likely to occur during use.

I hope that the content of this article can help everyone.