Overview
CBB film capacitors, using metallized polypropylene film as their dielectric material occupying a crucial position in electronic circuits due to their excellent electrical performance, stable temperature characteristics and long life.CBB film capacitors feature low loss, high insulation resistance, excellent frequency characteristics, and self-healing capabilities. They are widely used in AC motors, lighting circuits, filter circuits, and high-frequency electronic equipment, making them an indispensable component in the modern electronics industry.
1.CBB Film Capacitors Have Unique Technical Characteristics and Performance Advantages
CBB film capacitors use polypropylene film as their dielectric material, which exhibits extremely low dielectric loss (tanδ < 0.0005) and excellent electrical insulation properties. The metallized electrodes of CBB film capacitors are formed through a vacuum evaporation process, which imparts unique self-healing properties: when a localized dielectric breakdown occurs, the metal layer surrounding the breakdown point instantly evaporates, isolating the defect and allowing the capacitor to resume normal operation. This self-healing ability significantly improves the reliability and service life of CBB film capacitors. Furthermore, CBB film capacitors exhibit a stable temperature coefficient meaning their capacitance decreases slightly with increasing temperature.CBB film capacitors also exhibit minimal dielectric absorption, making them particularly suitable for demanding applications such as sample-and-hold circuits. These excellent properties have led to their widespread application in high-frequency circuits, pulse circuits, and precision electronic equipment. Modern CBB film capacitors also employ advanced technologies such as edge thickening and segmented designs, further enhancing their current withstand capability and reliability.
2.CBB Film Capacitors Offer a Variety of Models to Meet Different Application Needs
CBB film capacitors are categorized into several model series based on their structure and characteristics.The CBB21 is a general-purpose metallized polypropylene film capacitor encapsulated in epoxy resin, offering excellent moisture resistance and mechanical strength. It is widely used in DC circuits. The CBB22 is a metallized polypropylene film AC capacitor encapsulated in a flame-retardant plastic case that designed specifically for AC applications and commonly used in motor starting and running circuits. The CBB81 is a high-voltage metallized polypropylene film capacitor featuring a special internal structure resulting in excellent high-voltage characteristics and surge current withstand capability. The CBB13 is a precision metallized polypropylene film capacitor with high capacitance accuracy and stable temperature characteristics making it suitable for resonant and filter circuits. The CBB60 is a metallized polypropylene film capacitor for AC motors featuring a cylindrical metal case with a safe and explosion-proof structure. These various CBB film capacitor models meet the needs of a wide range of applications from consumer electronics to industrial equipment providing users with a wide range of choices.
3.CBB Film Capacitor Technical Parameters Determine Their Application Performance
The performance of CBB film capacitors is determined by a series of technical parameters, including capacitance, rated voltage, loss tangent, and insulation resistance. CBB film capacitors typically range in capacitance from 100pF to 100μF meeting the needs of most circuits. Rated voltages range from 63V to 2000V allowing users to select the appropriate specification based on the application voltage. The loss tangent is a key quality parameter for CBB film capacitors. High-quality products can achieve loss tangent values below 0.0005 ensuring low loss in high-frequency applications. Insulation resistance typically exceeds 10^4 MΩ ensuring excellent power retention. Temperature characteristics are also crucial for CBB film capacitors. The operating temperature range is generally -40°C to +70°C, Furthermore, CBB film capacitors exhibit excellent frequency characteristics with minimal variation in value over a wide frequency range. This combination of performance parameters makes CBB film capacitors an ideal choice for many high-end applications.
4.CBB Film Capacitors Have Wide Applications in Various Fields
CBB film capacitors are widely used in numerous fields due to their excellent performance. In industrial control industry, CBB film capacitors are used in motor starting and running circuits, providing essential phase shifting. In the lighting industry, CBB film capacitors are widely used in power factor correction circuits for lighting equipment such as energy-saving lamps and LED drivers. In power supply systems, CBB film capacitors serve as filter capacitors smoothing pulsating DC power after rectification. In communications equipment, CBB film capacitors are used in high-frequency coupling and bypass circuits based on their excellent high-frequency characteristics. In automotive electronics, CBB film capacitors are used in filtering circuits in devices such as engine control units. In the new energy sector, CBB film capacitors play a vital role in photovoltaic inverters and wind turbines. Furthermore, CBB film capacitors are widely used in a wide range of applications, including household appliances, medical equipment, and test instruments, where their reliability and long life are highly recognized by users.
Conclusion
As a vital component in electronic circuits, CBB film capacitors play an irreplaceable role in the modern electronics industry with their unique performance characteristics and wide range of applications. With the continuous advancement of electronic technology, CBB film capacitors will continue to develop towards high performance, high reliability, and miniaturization, providing better support for the next generation of electronic devices. In the future, with the application of new materials and processes, the performance of CBB film capacitors will continue to improve, and their application areas will continue to expand.