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1. Pay attention to the positive and negative poles of the DC electrolytic capacitor.
If the positive and negative terminals are reversed, an abnormal current will be generated, resulting in a short circuit and even damage to the device itself. If you are not sure about the positive and negative polarity, use a DC bipolar electrolytic capacitor. DC capacitors cannot be used in AC circuits.
2. Use within the rated voltage range.
If the voltage across the capacitor exceeds its rated voltage, a sharp increase in leakage current will cause deterioration of the capacitance characteristics or damage to the device.
3. Do not use electrolytic capacitors in circuits that require fast charge and discharge. If electrolytic capacitors are used in situations that require fast charge and discharge, the capacitor heat will cause the capacitor characteristics to deteriorate or even be damaged.
4. Use under rated ripple current.
If the ripple current exceeds its rated ripple current, the capacitor life will be shortened, and in extreme cases, its internal heat will burn it. In this circuit, a high ripple type electrolytic capacitor is used.
5. Capacitance characteristics change with operating temperature.
The characteristics of electrolytic capacitors will change with temperature. This change is temporary, and its original characteristics are still maintained at the initial temperature (if its characteristics have not deteriorated at a high temperature for a long time). If the use temperature exceeds its specified temperature range, the increased leakage current will damage the capacitor device.
6. The life of aluminum electrolytic capacitors.
When the characteristics of aluminum electrolytic capacitors deteriorate to the point of their failure, their lifespan ends. Temperature and ripple voltage are two important factors affecting its life.
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Link to this article：Precautions for Using Electrolytic Capacitors
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