The CBB21B Box - Type Metallized Polypropylene Film Capacitor is manufactured through a series of precise processes. First, high - quality polypropylene film is selected as the dielectric material. This film has excellent electrical properties and chemical stability. Metallization is then applied to the polypropylene film. A thin layer of metal, usually aluminum, is deposited on the surface of the film through a vacuum - evaporation process. This metallization forms the electrodes of the capacitor.
The capacitor elements are then wound. The metallized polypropylene film is carefully wound to form a compact structure, which helps in achieving the desired capacitance value. After winding, the capacitor elements are placed into a flame - retardant plastic case. This case not only provides mechanical protection but also helps in preventing the spread of fire in case of any electrical faults. Epoxy resin is then used to seal the capacitor, ensuring high moisture resistance and a stable internal environment.
It is widely used in high - frequency circuits. In communication equipment, such as radio frequency (RF) modules in mobile phones and wireless routers, the CBB21B capacitor plays a crucial role. Its low losses and high dv/dt (rate of change of voltage with respect to time) capability enable it to handle high - frequency signals efficiently. This helps in maintaining signal integrity and reducing interference, ensuring smooth communication operations.
In both DC and AC power supplies, this capacitor is a reliable component. In DC - DC converters, it can be used for filtering purposes, removing any ripples in the DC output. In AC circuits, such as in power factor correction circuits of electrical appliances like refrigerators and air conditioners, the CBB21B capacitor helps in improving the power factor, thus enhancing the energy - efficiency of these devices.
The capacitor is also suitable for high - current pulse circuits. In applications like electronic ignition systems in engines or pulsed power supplies for laser systems, the CBB21B capacitor can withstand high - current pulses. Its self - healing properties are particularly beneficial in such circuits. In case of any minor electrical breakdowns due to high - current surges, the capacitor can self - repair, ensuring continuous and reliable operation.
The CBB21B capacitor is designed to operate reliably even under high current stress. This is achieved through its unique structure and material selection. The metallized polypropylene film and the robust construction of the capacitor enable it to handle high currents without overheating or failure, making it suitable for applications where current surges are common.
One of the most remarkable features of this capacitor is its self - healing ability. When a small breakdown occurs in the dielectric due to electrical overstress, the capacitor can repair itself. The heat generated during the breakdown causes the surrounding metalized layer to vaporize slightly, covering the damaged area and restoring the insulation properties. This significantly extends the capacitor's service life.
The use of a flame - retardant plastic case and epoxy resin provides two - fold protection. Firstly, it ensures safety by preventing the spread of fire in case of internal electrical faults. Secondly, the epoxy resin sealing offers high moisture resistance. This is crucial as moisture can degrade the electrical performance of the capacitor over time. By protecting against moisture ingress, the capacitor maintains its stability and performance in various environmental conditions.
The low losses of the CBB21B capacitor mean that it dissipates very little energy as heat during operation. This improves the overall efficiency of the circuit. Its high dv/dt capability allows it to respond quickly to changes in voltage, which is essential in high - frequency and pulse - type applications.
As mentioned earlier, the combination of the plastic case and epoxy resin sealing gives the capacitor high moisture resistance. This characteristic makes it suitable for use in humid environments, such as in outdoor electrical equipment or in applications near water sources.
The CBB21B capacitor offers high stability of capacitance over its operating life. Its well - designed structure and high - quality materials ensure that the capacitance value remains within the specified tolerance range even after long - term use. This, along with its self - healing properties and robust construction, contributes to its long service life, making it a cost - effective choice for many electronic applications.
UF Capacitors is an ISO9001-certified manufacturer in China, founded in 1995. We hold military qualifications for tantalum capacitors, MLCC, and other products. Additionally, we have a UL-recognized test laboratory located at our factory site.
Our marketing position is to provide a superior alternative to first-tier brands such as TDK, Murata, AVX, EPCOS, Vishay, and Panasonic. We offer similar quality but at better prices, with faster lead times and excellent service. With extensive experience working with renowned international companies like GE, Philips, Jabil, and Flex, we have built a strong reputation.
UF Capacitors serves the consumer electronics, computing, communications, and industrial markets. As a professional Chinese electronic components manufacturer, we are dedicated to delivering high-quality electronic components, exceptional management, strict quality control systems, and excellent sales service. We strive to foster mutually beneficial partnerships and drive business growth.
UF capacitors produce PIN to PIN replacement to tier-1 brands like Vishay, Kemet,
Following cross to FYI, welcome to send RFQ to connie@ufcapacitrs.com, we have tech team to do cross to for your case by case. Thanks.
|
Photo |
Description |
UF Capacitors |
Vishay |
Kemet |
|
|
Box Type Metallized Polypropylene film Capacitor |
CBB21B Series |
MKP385（DC） Series |
F461 Series |
