What should I pay attention to when using metalized capacitors?

Pay attention to the following points when using metalized capacitors:




1. The specifications of metallized capacitors are based on product specifications. If they cannot be used or exceed the rated use during use, the scope of application must be reviewed.

2. The metalized capacitor itself will change its electrical characteristics according to the surrounding environmental conditions. Under natural conditions, the moisture in the air will also produce a little capacity change, and the degree of capacity change is also based on the dielectric body. There are differences in material, exterior material structure, etc.

3. Noise problem: The noise that occurs in the metallized capacitor is caused by the mechanical vibration between the two poles of the film through the alternating current power of the dielectric film, and the problem of noise, especially the voltage instability or voltage When the wave is used in high-frequency electrical appliances, it will produce a higher vibration sound, but it does not affect the electrical characteristics of the metalized capacitor itself, and the volume and frequency of the noise will also change in different manufacturing batches. It must be confirmed that it is audible and audible during use. The degree of acceptance of murmurs.

4. Storage methods and storage conditions
①. Moisture, dust reactivity, and acidifying gas (salted hydrogen, acidified hydrogen, sulfite gas) will have a degrading effect on the welding terminals of the external electrodes of the capacitor, and you must pay attention to the above problems.
②. Especially avoid places with high temperature and humidity, store at -10~40℃, humidity below 85%, and do not directly expose to water or moisture, so as to avoid moisture intrusion and damage to metalized capacitors. Metalized capacitors

5. Problems that should be paid attention to when using
①.The metalized capacitor must avoid the environment of rapid voltage change or rapid temperature change, even if it does not exceed the rated value of the metalized capacitor, it will cause rapid deterioration of the quality of the metalized capacitor.
②. If metallized capacitors are used in circuits, there are rapid or frequent charging and discharging, special frequencies such as high frequencies or different atmospheric pressures. The applicability of metallized capacitors must be confirmed.
③.Metalized capacitor voltage test, life test, when multiple metalized capacitors must be connected in parallel, metalized capacitors must be connected in series with resistance.
④. When general metalized capacitors are subjected to over-voltage, abnormal over-temperature or the end of the product life, and the insulation is damaged, the metalized capacitors may smoke or burn out. In order to prevent this from happening, protection must be used. The type of metalized capacitor makes the metalized capacitor break with the circuit when an abnormal situation occurs to achieve the protection effect.