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Check Out The Remarkable Electrical Characteristics Of The Film Capacitors

By Author: Dekielectronics
Total Articles: 6
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The capacitors which dielectrical part is developed with the thin sheet of film are called Film Capacitors. On the basis of the dielectrical part, there is another capacitor type- plastic paper capacitor. But this type is designed in a unique way, and thus has the potential to withstand against larger power values reaction.

In contrast to other capacitors, this type is cheap, more stable and possesses low ESR and self-inductance. These features of this capacitor make it utmost reliable to use for a long time without any hassle. In this article, you can know about some remarkable characteristics of it.

It is temperature dependent:

The prime function of the capacitors is to possess its capacitance. But it is an interesting point to note that the capacitance is directly proportionate with the temperature. In varied temperatures, the varied dielectrics will express varied capacitance. If you want to measure the coefficient of temperature, then you must know the way it is represented.

It is represented in ppm (parts per million)/ degree Celsius. This calculation is only applicable to the class one ceramic capacitors. For others, including Mylar Capacitor it is represented in percentage of the range of total temperature.

It has standard tolerances and capacitance values:

The capacitance value is represented in two ways- nominal capacitance CN and CR. Frequency is another prominent aspect that creates a great impact on the values of capacitance notably. The condition considers for a general measurement is the AC low-voltage method.

Tolerance of all capacitor types including the Motor Run Capacitor is measured in percentage. The deviation percentage allowed to pass through the capacitors is its tolerance. Therefore, it is clear that the tolerance of each capacitor is quite different from one another.

It comes with the Series-equivalent circuit:

Ideal capacitors have deviated from the discrete capacitors. The components which are used to develop a capacitor are equipped with parasitic and losses inductive parts. But the ideal capacitor performs extraordinarily in releasing and storing electrical energy without any dissipation.

An ideal example of this type is the Fan Motor Capacitor. Nowadays, the series-equivalent circuit is imposed in all capacitors types because of measuring, specifying and defining the actual capacitance of the specific capacitor.

It is frequency dependent:

Frequency is another crucial aspect of playing a responsible role in the flickering of the capacitance. But there is another point which must not be overlooked. As the frequency increases the potentiality of the dielectric of Plastic Film Capacitor gets eliminated. This phenomenon is often referred to as dielectric relaxation.

It is voltage dependent:

Interestingly, the capacitance of both electrolytic and film capacitors doesn’t get affected during any disturbances of voltage. But it is proved that capacitance somehow depends on the applied voltage.

The effect can be visible clearly in the case of class two ceramic capacitors. You cannot find this capacitor type from any Pulse & Power Capacitors Suppliers in Delhi/NCR, India. It is because they only supply film capacitors.

You have to find someone else who supplies class two capacitors. Remember, you must choose the one according to your preferences.

Article Source: http://www.apsense.com/article/check-out-the-remarkable-electrical-characteristics-of-the-film-capacitors.html

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