MKP383447100JKI2B0

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Film Capacitors

Film capacitors, sometimes referred to as film dielectric capacitors or polyester capacitors, are capacitors that use a paper or plastic film as the dielectric material. In comparison to other capacitor technologies, such as ceramic, electrolytic, and tantalum, the film capacitor has advantages such as very low dielectric loss, long life, low equivalent series resistance (ESR), and excellent stability versus temperature.

A specific film capacitor product example is the MKP383447100JKI2B0. This is a 100nF (0.1μF) radial leaded film capacitor with up to 400VDC of working voltage. The rated temperature range of this capacitor is -25°C to +85°C, with a 0.2 x UR Tanδ of 0.2%.

Application Field

Film capacitors have a wide range of applications in automotive, consumer electronics, multi-function printers, switching power supplies, medical equipment, industrial and military applications. As mentioned previously, thanks to their low equivalent series resistance (ESR), they are often used in applications where this is an important parameter, such as decoupling, power supply stabilization, audio crossover networks, or frequency control oscillators. The MKP383447100JKI2B0 is mainly used in decoupling (low-pass filtering) or energy storage purposes due to its high surge current capability, high voltage, and small package size. It can be used in applications where the transistor switched at high speed, such as communication systems.

Working Principle

Film capacitors operate under the same principles as all other capacitors. Two plates separated by an insulator, or dielectric, can store electrical energy by storing electric charges when a voltage is applied across the plates. For the MKP383447100JKI2B0 capacitor, this is a paper or plastic film dielectric. The dielectric material affects the capacitance of the capacitor due to its permittivity. The stored charge affects the current that can be delivered at a given voltage and the amount of charge can be determined by the capacitance. The MKP383447100JKI2B0 capacitor dissipates very little heat due to its low dielectric loss (Tanδ = 0.2%). The stored energy is delivered much more slowly compared to an electrolytic capacitor, so it’s better sapped for energy storage rather than power supply applications.

One of the advantages of a film capacitor is its long life span when operated at specified ripple current and temperatures. MKP383447100JKI2B0 capacitors have an expected lifetime of 10,000-50,000 hours, depending on environment, ripple current, and other parameters.

Overall, the MKP383447100JKI2B0 film capacitor is an excellent choice due to its low equivalent series resistance (ESR), long life, excellent stability versus temperature, and low dielectric loss. This capacitor is a good option for decoupling (low-pass filtering) or energy storage applications and is well suited for automotive, consumer electronics, multifunction printers, switching power supplies, medical equipment, industrial, and military applications.

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