Low Leakage Current Electrolytic Capacitor

Description

Low Leakage Current Electrolytic Capacitor Features And Applications

Low Leakage Current Electrolytic Capacitor, the higher the capacitor capacity, the greater the leakage current; lowering the operating voltage reduces leakage current. Conversely, selecting a higher withstand voltage will also help reduce leakage current.

When the aluminum electrolytic capacitor is stored in a long-term voltage-free state without any application, the chloride ion in the electrolyte has the greatest damage to the alumina dielectric film, especially when the temperature is high and the voltage is high, a voltage is generated. Leakage current above normal. However, as the oxide layer is regenerated during use, the leakage current gradually decreases to a normal value. At the same time, due to iron, the galvanic effect of copper ions is gradually restored, which makes the leakage current of the aluminum electrolytic capacitor need to be applied for a long time to recover. This process is called aging or empowerment. Therefore, from the perspective of leakage current, aluminum electrolytic capacitors are preferably energized and energized at all times to ensure the performance of aluminum electrolytic capacitors.

At the same time, the high temperature environment will reduce the leakage current performance of the aluminum electrolytic capacitor. At the highest operating temperature, the loss of leakage current of the aluminum electrolytic capacitor at the rated voltage is about 0.4W, while the operation is only 0.03W at room temperature. If the operating voltage is reduced to 90% of the rated voltage, the loss can be reduced to 0.004W. It can be seen from the above analysis that a proper reduction of the operating voltage and the ambient temperature can reduce the leakage current by one to two orders of magnitude, which is extremely advantageous for long-term reliable use of the aluminum electrolytic capacitor.

Low Leakage Current Electrolytic Capacitor Electrical Performance

Low Leakage Current Electrolytic Capacitor Size Comparison Table

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