Uses, characteristics and precautions of metallized film capacitors

Metallized film capacitors belong to a kind of electrical appliances with a relatively high frequency of use. They are mainly widely used in the cross-connection of analog signals and other power sources. It has many excellent features and is a very good capacitor product.

Advantages of metallized film capacitors:

1. The applicable temperature range of the film capacitor is relatively wide, and the temperature limitation is relatively small.

2. This kind of capacitor has a very long service life. As long as there is no damage, there will be almost no service life limitation, and it can be used for a long time.

3. Film capacitors are metalized electrodes. This type of electrode has a self-healing function and can be automatically repaired when there is a small damage.

4. This kind of device can withstand very high voltage when it is working, without problems.

5. It has no polarity, and ESR is also very low.

6. When in use, its use frequency characteristics are relatively good.

Application of metallized film capacitors:

1. Application in power electronic circuits. Film capacitors are used here, mainly to buffer and clamp the power current, resonant bypass, and suppress the electromagnetic interference of the power supply.

2. When the film capacitor is used as a bypass, it mainly plays a role in reducing the impedance of the DC bus and absorbing the ripple current from the load, thereby effectively suppressing the fluctuation of the DC bus voltage due to sudden load changes.

3. When the device is used in a resonant converter, it can function as an inductor to achieve resonance.

Matters needing attention in the application of metallized film capacitors:

1. First of all, pay attention to carefully observe the state of the working voltage. When the working voltage is very unstable, do not use the film capacitor.

2. Then look at the voltage change speed, the speed is relatively stable and it can be used.

3. To meet the effective value current and peak current flowing through the capacitor.