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Factors affecting the performance of ceramic capacitors

Release time:

2022-12-02 09:35

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1. Effect of humidity on deterioration of electrical parameters:
When the humidity in the air is too high, the water film condenses on the surface of the capacitor shell, which can reduce the surface insulation resistance of the capacitor. In addition, for the semi-sealed capacitor, water can also penetrate into the dielectric of the ceramic capacitor, reducing the insulation resistance and insulation capacity of the capacitor dielectric.

2. Breakdown mechanism of ceramic capacitor at high temperature
The breakdown failure of semi-hermetic ceramic capacitor is a common serious problem when it works in high humidity environment. Due to the migration of silver in ceramic capacitors, the electrolytic aging and breakdown of ceramic capacitors has become a very common problem. Thermal breakdown often occurs in small ceramic dielectric capacitors of tubular or circular shape, because the local heat is serious during breakdown, and the thinner pipe wall or smaller ceramic body is easy to burn or break.

3. Fracture of laminated ceramic capacitor:
Because the laminated ceramic capacitor is directly welded on the circuit board, it directly bears the mechanical stress from the circuit board, while the lead ceramic capacitor can absorb the mechanical stress from the circuit board through the pin.

The above three factors will have an impact on the normal use of ceramic capacitors. In fact, no matter what products are, they should operate in the environment suitable for them. Some precision instrument products need to pay attention to the changes in the use environment, so that the performance of the products can be brought into play.

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