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Film Capacitors

Film capacitors are electrical components that use thin plastic films as the dielectric medium to separate the two conducting plates. This type of capacitor is usually characterized by long lifespan, high insulation resistance, low loss, and temperature stability. The production of film capacitors also features great flexibility in terms of the material used for the dielectric layer, as well as the presence of different sizes and shapes. These qualities make film capacitors ideal components for a wide variety of applications.One example of a popular film capacitor is the MKP385410085JI02W0. This capacitor utilizes a polypropylene film as the dielectric layer with a cylindrical shape. The body of the capacitor has a maximum diameter of 38 mm and a minimum length of 54 mm. The main feature of this type of capacitor is its self – healing properties, which induce reactive anode-cathode arcs. This helps maintain the capacitor’s optimal performance even when exposed to repetitive over-voltages.Apart from being used in audio and power electronics, the MKP385410085JI02W0 has also seen extensive use in high-voltage applications, such as electric motors, and generators. It can also be used in a wide variety of signaling applications due to its good screening properties. In every application, the capacitor ensures reliable operation in temperatures ranging from -55 to 105°C, and a maximum voltage range of 600 VDC.The core principle of operation behind the MKP385410085JI02W0 is fairly simple. The object of the capacitor is to store energy as a static charge between its plates. This can be done by separating the plates with a dielectric material, such as polypropylene. When a voltage is applied to the plates, the film activates and the static charge is created.The static charge continues accumulating on the plates until the voltage reaches a maximum level. This level is known as the dielectric’s breakdown voltage. Once the breakdown voltage is reached, the additional voltage no longer affects the capacity of the capacitor, and the charge stops accumulating. When the excess voltage is removed, the capacitor returns to its normal state.

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