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Film Capacitors

Film capacitors, also known as film dielectric capacitors, are capacitors which contain a polymer film as the dielectric. The dielectric film is usually polypropylene, polyester, or polycarbonate film. These capacitors are commonly used in various electronics applications such as power supplies, consumer electronics, medical equipment, automotive and aerospace applications as they possess superior temperature characteristics, low ESR, electrical reliability and long life.

The F339MX251031JIP2T0 is a type of film capacitor from TDK Corporation. It is a metallized polyester film capacitor with a pacakge size of 1.6mm (L) x 0.8mm (W) X 0.8mm (H). It is widely used in various applications such as power supplies, filters, switchers, HVAC systems and other AC applications. It has a self-healing characteristic which helps to protect the capacitor from any short circuits.

The F339MX251031JIP2T0 is a non-polarized device. It has a rated voltage of 16V and is rated for a capacitance value of 0.039μF. The capacitance tolerance of the capacitor is C0G. The temperature range for the device is -40°C to +105°C( -40°F to +221°F) and the capacitance change at this range is max ± 30%. It has an insulation resistance of more than 3000MΩ at 500Vdc and it is RoHS compliant.

The major advantage of polyester film capacitors over other types of capacitors is their low dissipation factor, low leakage current, stable electrical characteristics and relatively high dielectric breakdown voltage. The F339MX251031JIP2T0 is also highly reliable, with a rated life of 2000 hours at 105°C and 1000 hours at 125°C. The device is designed to withstand open circuit volatge up to 250Vac without damage and ripple currents up to 10A/25V.

The working principle of a film capacitor is similar to that of other types of capacitor, where electric fields are created by an electric charge or current when two electrical conductors are insulated from each other. The dielectric film acts as the insulator and keeps the electric fields in the capacitor roll-off state. The dielectric film also helps to reduce the voltage across the capacitor.

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