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Are capacitors waterproof?

The ideal use environment for capacitors is to use in places where the temperature and humidity are not too high, but in some cases, many capacitors will encounter a very humid environment, and may even encounter water. Is the capacitor waterproof?

Most capacitors are afraid of humidity and high temperatures.​

For the vast majority of capacitors, it is not waterproof, if encountered with water, the circuit will be easily damaged.

In order to achieve a waterproof effect, some electrical appliances will be processed by shell sealing, gluing and other ways. If you do not do a good job of waterproof treatment, after encountering water, the capacitor is particularly easy to damage.

Even if the capacitor does not encounter water, it generally cannot be used in places with high humidity. When the humidity in the air is too high, the water film condenses on the surface of the capacitor shell, which can make the surface insulation resistance of the capacitor drop. Here, for the semi-sealed structure capacitor, water can also penetrate into the capacitor medium, so that the dielectric insulation resistance insulation ability of the capacitor decreases.

Some capacitors are not afraid of water.​

There are also special capacitors that seal exceptionally well and are not afraid of water.

For example, CBB60 capacitor for water pump, CBB65 capacitor for air conditioning machine, they are used in the environment where the humidity is particularly high, but their enclosure sealing performance is particularly good, so the moisture resistance is still very good.

Of course, even if the waterproof effect is good, also try to stay away from the water, so that the service life of the capacitor can be longer.

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