Development status of metallized film capacitors

The development status of metallized film capacitors in China: Since the advent of metallized film capacitors produced by hand in the 1960s, China's metallized capacitors have experienced three developments. In the 1980s, the success of color TV production was completed. Manual engineering to the introduction of single-machine automation technology transformation.

In the 1990s, the metal film capacitors were miniaturized (winding type and metallized lamination type) with the "short, small, light and thin" of the electronic machine. In the past century, it has been used in conjunction with the electronic machine. The reliability requirements have undergone technological transformation based on safety capacitors. In recent years, metallized film capacitors have ushered in the fourth development trend of joint-stock and private investment.

The advantages of metallized film capacitors: metallized polyester film winding, non-inductive structure epoxy resin encapsulation, CP line unidirectional extraction self-healing performance, high insulation resistance, stable capacitance. Suitable for DC and pulsating circuits, widely used in various electronic and electrical equipment, such as filtering, blocking, bypassing, coupling and noise reduction.

The resistance of the metal film capacitor to ripple current can reach ten times to several tens of times the rated ripple current of the same capacity aluminum electrolytic capacitor. In order to achieve higher current withstand capability, aluminum electrolytic capacitors usually use larger capacity to meet the requirements. Larger capacity is an unnecessary waste of cost and installation space. Therefore, metallized film capacitors are highly demanded in the market.

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