Welcome to the official website of Zhizhong Electronics Co., Ltd.Company focus: Ceramic Capacitor, Monolithic capacitor

　　1. The role of polyester film capacitors Capacitors are an essential element in electronic products. They act as filtering, oscillation, power decoupling, and pulsating signal bypassing and coupling in the circuit.
　　 Second, the composition of polyester film capacitors The simplest structure of a capacitor can be composed of two metal plates sandwiched between a layer of insulating medium. A voltage is applied between the two metal plates (polar plates), and the plates can store electric charge. The size of the stored charge is proportional to the voltage between the plates and the area (capacity) of the plates, and inversely proportional to the distance between the plates. Q=CV, ie C=Q/V=εS/4πd ("Refer to the Theoretical Calculation and Correction of Film Capacitors for details") Q—charge stored on the plate C—capacitor (PF) V—voltage between the plates (V) ε ——Dielectric permittivity (polyester film is 3.0, polypropylene film is 2.1) S—metal plate area (mm2) d—distance between the plates (mm)
3. Types of polyester film capacitors. There are many types of capacitors. According to their adjustability, they can be divided into three types: fixed capacitors, fine-tuning capacitors, and variable capacitors. According to the medium, they are divided into gas medium, inorganic solid medium, organic solid medium, electrolytic medium, Capacitors such as liquid media and composite media. Among them: gas capacitors include air, vacuum, and gas-filled capacitors; inorganic solid capacitors include mica, ceramic and glass glaze capacitors; organic solid capacitors include organic film and paper capacitors; electrolytic dielectric capacitors include aluminum electrolytic, niobium electrolytic and tantalum electrolytic capacitors; Liquid dielectric capacitors include various organic oil and liquid capacitors; composite dielectric capacitors include organic solid composite, inorganic solid composite, organic solid and inorganic solid composite capacitors. At present, there are mainly three types of capacitors in market applications: ceramic capacitors, film capacitors, and electrolytic capacitors. These three types of capacitors account for more than 99% of the market volume.