There are many different types and models of thin-film capacitors. The suitable type of capacitors can be selected according to the different use scenarios. Today we are going to talk about organic film capacitors. What are the advantages of organic film capacitors?
The volume reduction can replace the previous occasions where electrolytic capacitors are used, and has higher voltage resistance;
There is no risk of electrolyte leakage, so it has higher reliability;
When the circuit encounters instantaneous overvoltage, it has self-healing characteristics, which can well protect the circuit safety and eliminate the risk of circuit over-voltage breakdown and short-circuit;
Adopting non inductive winding technology, the product meets the low inductance characteristics, and is more suitable for the rising working frequency of the power supply system;
Using low loss dielectric material, the product has low loss characteristics, can withstand larger ripple current, and has lower heating capacity;
Nonpolar dielectric material, able to withstand reverse peak voltage, can meet the use of AC and DC filter circuit.
The self-healing mechanism of metallized organic film capacitor has two different mechanisms: one is discharge self-healing; the other is electrochemical self-healing. The former occurs at a higher voltage, so it is also referred to as high voltage self-healing; because the latter also occurs in the case of very low voltage, it is often referred to as low-voltage self-healing.
The biggest characteristic of metallized organic thin film capacitor is its self-healing ability, so the advantages brought by self-healing are main. However, it also has disadvantages. The biggest harm is the current pulse caused by self-healing, which brings signal interference to the circuit and reduces the important performance of the circuit signal-to-noise ratio. Therefore, for some circuits with high requirements, such as high fidelity audio circuit, high-precision communication circuit, the organic film capacitor can not be self-healing when working.
Another disadvantage of self-healing is that the capacity of capacitors is gradually reduced. If there are many self-healing times when the electric capacity is working, its capacity and insulation resistance will be significantly reduced, and the loss angle will be greatly increased, which will make the capacitor fail quickly.
In a word, the advantages and disadvantages of the application of organic thin film capacitors are greater than the disadvantages. When purchasing organic thin film capacitors, enterprises should choose the appropriate capacitor components according to the comprehensive factors such as the operating environment and circuit characteristics of the capacitors. For more models and types of capacitor components, please move to the product center.