Polyester film capacitors, also known as polyester capacitors, are one of the widely used capacitor types in electronic devices. They use polyester film as the dielectric, have a high dielectric constant and good stability. This article will briefly introduce the technical characteristics and application fields of polyester film capacitors.
I. Technical characteristics of polyester film capacitors:
1. High stability: Polyester film capacitors are famous for their stable electrical properties, and their capacity changes very little over time, even at extreme temperatures.
2. Excellent frequency characteristics: This type of capacitor has low dielectric loss and good performance at high frequencies, making it suitable for high-frequency circuits.
3. Good voltage resistance: Polyester film capacitors can withstand high voltages and are suitable for high-voltage circuits.
4. Long service life: Compared with other types of capacitors, polyester film capacitors have a longer service life because their electrochemical properties are relatively stable.
II. Application fields of metallized polyester film capacitors
1. Electronic equipment: Polyester film capacitors are widely used in electronic equipment such as televisions, computers, and mobile phones for filtering, coupling, tuning, etc.
2. Power electronics: In inverters, UPS (uninterruptible power supplies) and other power conversion devices, polyester film capacitors are used as key components to store energy and stabilize current.
3. Automotive industry: Polyester film capacitors are often used in automotive electronic systems, such as engine control modules and airbag systems.
4. Industrial control: In industrial automation and control systems, polyester film capacitors are used to ensure the stable operation of the system.
5. Medical equipment: Some medical equipment, such as electrocardiographs and magnetic resonance imaging equipment, also require the use of polyester film capacitors.
In general, polyester film capacitors are widely used in many fields due to their excellent technical characteristics. With the development of science and technology, it can be foreseen that polyester film capacitors will continue to play an important role in the field of electronics.