BF014D0102J

Film capacitors utilize dielectric films, primarily polypropylene, as an electrolyte for a capacitor. The capacitor is constructed using very thin layers often referred to as a film barrier between layers of electrodes in order to increase capacitance. The advantages of this style of capacitor are a lightweight, smooth operating frequency response, and an extremely low ESR (Equivalent Series Resistance) due to high quality film dielectrics.

BF014D0102J is one type of film capacitors, which is designed to take significant advantage of the benefits of polypropylene film capacitor in the entire range of audio and switch mode power supply applications.

Application Field

BF014D0102J is mainly used for power management applications, including AC adapters, back-up UPS, industrial control, DC-DC converters, solar and battery charge. It is suitable for power electronic markets, particularly for those applications that require capacitors with superior ripple current capabilities and excellent temperature stability. BF014D0102J is also used commonly in audio-oriented circuits, such as tube amplifiers and guitar effects. The capacitors have a high capacitance combined with low ESR, both characteristics being important in audio applications. Moreover, the polypropylene film used in audio-oriented capacitors enhances frequency response. In addition, the elongated form factor of the BF014D0102J capacitor allows for greater design flexibility.

Working Principle

The working principle of the BF014D0102J capacitor involves the storage of electric charge. Film capacitors consist of a dielectric film, commonly polypropylene, sandwiched between two metal plates. When a voltage is applied to the electrodes, an electric field forms that causes positive and negative charges to accumulate on each side of the dielectric, creating a capacitor. When capacitance is measured, it is important to note that the measurement is the capacitance between the two poles of the capacitor. The values of capacitance vary depending on the type and thickness of the film and the area of the metal electrodes. The capacitance also changes depending on the applied voltage or the environment temperature. The life expectancy of the capacitor depends on several factors, primarily the maximum operating voltage. The higher the voltage, the more the dielectric is put under stress which will eventually lead to its breakdown. Operating temperature is another contributing factor that can affect the capacitor’s life expectancy. As the temperature rises and the dielectric weakens, the breakdown voltage decreases and the capacity increases.

At high frequencies, the inductance in the loop formed by the parallel connection of the capacitors, the circuit inductance, and the wiring will increase. This effect is known as the parasitic inductance. The total amount of parasitic inductance can be determined by testing and will determine the effectiveness of the capacitor in high frequency switching power supply applications. In low frequency applications, such as audio, the BF014D0102J capacitors have extremely low ESR resulting in excellent performance in high current filters.