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Film Capacitors

B32021A3102K000 application field and working principle

Film capacitors, also known as film dielectric capacitors, plastic film capacitors, or polymer film capacitors, are electrical components made of a thin film that acts as one of the electrical plates of a capacitor, the other being a flat aluminum or copper layer. Film capacitors offer excellent characteristics that surpass traditional capacitors in many applications. They exhibit high stability with temperature, high levels of dielectric strength, are resistant to breakdown and most feature low levels of dielectric absorption. Due to their higher stability and reliability, film capacitors offer great value in critical applications like power supplies and motor control.

B32021A3102K000 is an example of a film capacitor that can be found in either service entrance or residential harmonic filters. This capacitor features two electrodes, one on each side of the dielectric. Its use is mainly focused in the Power Quality segment, where it helps eliminate high frequency harmonic currents which are generated mainly by certain appliances(Compact Flourecent Lamp and Variable Frequency Drives), that contain Electric Motors as part of their component composition.

This particular capacitor has a DC Voltage rating of 450V and is designed for Continuous Duty service at 50 or 60 Hz. It displays a capacitance of 0.1uF, high insulation resistance, long life expectancy and its casing has been designed with a fully insulated body that effectively shields its contents from environmental humidity or exposure to weather elements.

The main these devices provide is a very low Distortion Factor, with very low levels of losses. This means that it is able to absorb and store energy, which is then re-emitted. As Film Capacitors are known to discharge energy in the form of quality AC sine waves they are increasingly found in applications such as UPS units, Industrial Motor Control Circuits, and Generator Systems.

Working principle of this type of film capacitor is relatively simple. An alternating electric field produces an electric displacement, which causes a build-up of a charge in the film capacitor, similarly to the build-up of voltage in an inductor when alternating current is applied. This charge then acts as a stabilizing element on current, decreasing conduction losses in the application and protecting the circuit against high frequency harmonics.

The B32021A3102K000 film capacitor is a reliable, cost effective solution for residential and service entrance harmonic filtration applications, displaying superior performance and superior quality, satisfying the most demanding requirements for power quality applications worldwide.

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