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Film Capacitors

Film capacitors, also known as polymer film capacitors, or plastic film capacitors, are electronic components that are used for many different applications. They have a wide range of uses, from providing energy storage and voltage regulation to helping reduce noise or act as a filter. The MKP385247085JC02W0 is a film capacitor designed for high-frequency applications with an operating temperature range of −40 °C to +105 °C.

Application Field

Film capacitors are commonly used in low ripple power applications such as switching power supplies, power converters, battery chargers, and DC-DC converters, as the superior capacitance retention and stability, low ESR, and low losses at high frequencies make them the ideal choice for this type of application. The MKP385247085JC02W0 is an especially useful type of film capacitor as it provides high capacitance stability, low ESR, low leakage current and low parasitic inductance.

In addition, they are more reliable than their ceramic counterparts, making them ideal for using in high reliability military, aerospace, and medical applications. The MKP385247085JC02W0 is particularly suitable for such applications and due to its cushioned structure, it meets multiple safety requirements. Moreover, due to its high dielectric strength, it is often used to connect two or more circuits together without causing flashovers or arcing, making it a highly useful device for isolation.

Film capacitors are also used in communication and audio applications, such as loudspeakers, cell phones, and Bluetooth headsets. The MKP385247085JC02W0 is well suited for these applications as it provides superior filtering characteristics, as well as extremely low noise and low distortion.

Working Principle

Film capacitors use dielectric film as the insulating material between the plates. The dielectric film is composed of a thin layer of material such as polyester, polypropylene, or polycarbonate, which is then stretched across two metal plates. The plates are then sealed in a shaped rubber or plastic body, which provides physical protection from the environment and also electrical insulation.

Film capacitors operate using Faraday’s Law of Induction, which states that when a conductor moves relative to a magnetic field, a voltage is induced in the conductor. In the case of a film capacitor, the voltage is induced between the two plates, creating an electrical field. This field attracts electrons and stores them inside the plates, creating a charge that can then be accessed when needed. The higher the capacitance, the more electrons are stored and the higher the charge.

The MKP385247085JC02W0 is a particularly useful film capacitor for high-frequency applications as it provides excellent frequency-dependent parameters. It also has superior damping capabilities, which help to reduce noise, and provides low parasitic impedance, making it an ideal choice for a variety of applications.

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