Damage characteristics of electrolytic capacitors in electronic components

In electronic components, electrolytic capacitors are widely used in electrical equipment, with high failure rate. Electrolytic capacitor damage has the following manifestations:

One is the loss of capacity or smaller capacity;

Second, slight or serious leakage;

The third is the loss of capacity or smaller capacity with leakage.

Methods to find out the damaged electrolytic capacitors of electronic components are as follows:

(1) Look: some capacitors will leak when they are damaged, and there will be a layer of oil on the surface of the circuit board below the capacitor or even on the surface of the capacitor, so the capacitor can't be reused; some capacitors will bulge when they are damaged, and the capacitor can't be used any more; therefore, when selecting the capacitor in the early stage, we should control the quality and try to choose the capacitor of famous brand, such as Guoju power, a giant capacitor Rong.

(2) Touch: after power on, some electrolytic capacitors with serious leakage will get hot, even hot hands when touching with fingers, so this kind of capacitor can be replaced;

(3) There is electrolyte inside the electrolytic capacitor. If it is baked for a long time, the electrolyte will dry and the capacitance will decrease. It is necessary to check the capacitance near the heat sink and high-power components. The closer it is to them, the greater the possibility of damage.