Why does electrolytic capacitor capacity decrease? |Focus on mid-to-high-end brand capacitor manufacturers

One of the main parameters of electrolytic capacitors is the leakage current. The leakage current of the finished product just produced by the manufacturer is generally very small. As the storage time (in the manufacturer's inventory or in the user's inventory) prolongs, the leakage current will become larger and larger. It is because the anodic oxide film of the insulating medium of the electrolytic capacitor is slowly injured in the weakly acidic electrolyte, and some spots are generated. Fortunately, the electrolytic capacitor has the advantage of 'self-healingThe film defect will be repaired, restoring its insulating medium performance. This charging process is called 'aging' in the industry terminology. Electrolytic capacitor manufacturers generally require aging once after three months of inactivity, but there is no problem with aging once in half a year after being idle. The aging time is 30 minutes to 2 hours (depending on the capacity and voltage). Therefore, as long as the electrolytic capacitor installed on the whole machine is used frequently, the defect of the anodic oxide film of the electrolytic capacitor is constantly being repaired repeatedly to maintain the long-term stable operation of the electrolytic capacitor.

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