Classification and Application of Film Capacitors (1)

Classification of film capacitors and their applications (1) Definition of film capacitors: Film capacitors, also known as plastic film capacitors, refer to capacitors with plastic film as the dielectric. Classification of film capacitors: Film capacitors are made of metal foil as electrodes, and plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate are overlapped from both ends and wound into a cylindrical structure. Capacitor. According to the type of plastic film, they are called polyethylene capacitors (also known as Mylar capacitors), polypropylene capacitors (also known as PP capacitors), polystyrene capacitors (also known as PS capacitors) and polycarbonate capacitors. Shenmao Electronics Co., Ltd. has focused on polypropylene (CBB capacitors) and polyester capacitors (CL capacitors) for 36 years. The main application circuits of film capacitors: EMI filter circuit, bridge rectifier filter circuit, resonant circuit, etc. Classification and characteristics of film capacitors: polypropylene film capacitors (CBB capacitors): 1. Metallized polypropylene film capacitors (CBB20u0026MPT/MPA): Features: ①Small size and light weight. ②Good capacity stability. ③Good self-healing. ④The high frequency loss is small. ⑤Widely used in high frequency, DC, AC and pulse circuits. Industry applications: switching power supplies, power amplifiers, frequency dividers, stage equipment, fans. Wide range of uses: temperature compensation circuit, timing, oscillation circuit, DC blocking, bypass and coupling (decoupling). 2. Metallized polypropylene film capacitors (CBB220u0026MPP): Features: ①Low high frequency consumption. ②The internal temperature rise is small. ③High insulation resistance, good self-healing property and long life. ④Widely used in high frequency, DC, AC, pulse and S correction circuits. Industry applications: suitable for applications requiring small size, LED lights, resistance-capacitance step-down circuits, and large currents. Wide range of uses: low loss, low internal temperature rise, high frequency, DC, AC and pulse circuits. 3. High-voltage polypropylene film capacitors (CBB81u0026PPS): Features: ①Excellent frequency and temperature characteristics. ②The loss is small, the internal temperature rise is small, and the reliability is high. ③Negative capacitance temperature coefficient and good stability. ④Designed for the line and reverse circuit of color TV and monitor, used in high pulse, high current circuit. Wide range of applications: charging, boosting and discharging, high pulse, high current, electronic ballast and telegram shooting. Industry applications: electric mosquito swatter, high-frequency power supply, baton booster discharge. Shenzhen Shenmao Electronics has focused on the development and production of aluminum electrolytic capacitors for 36 years, and has a strong technical force and Ru0026D team. The production workshop has advanced equipment, and the corresponding supporting testing equipment is complete. For 36 years, we have been striving for perfection, taking the honor of providing customers with excellent products, and being responsible for every penny of customers.

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