Aluminum electrolytic capacitors are made of an aluminum cylinder as the negative electrode, filled with liquid electrolyte, and inserted into a curved aluminum strip as the positive electrode. It also needs to be processed by DC voltage to form an oxide film on the positive electrode sheet as a medium. It is characterized by large capacity, but large leakage, poor stability, positive and negative polarity, and is suitable for use in power supply filtering or low-frequency circuits. When using, do not connect the positive and negative poles reversely.
The global aluminum electrolytic capacitor supply market is becoming increasingly mature, mainly concentrated in Japan, China, Taiwan, South Korea and other regions. Judging from the overall competition pattern of the industry in recent years, the production volume of electrolytic capacitors in Japan has gradually shrunk and been replaced by Korean companies, Taiwanese companies, and mainland Chinese companies. Before 1978, aluminum electrolytic capacitors were considered high-tech products in mainland China. However, after more than thirty years of development, aluminum electrolytic capacitors are no longer high-tech products for domestic aluminum electrolytic capacitor manufacturers. product. From a technical point of view, capacitors produced by some well-known domestic brands can completely replace foreign capacitors.
