223MMR250K

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Film capacitors, also known as plastic dielectric capacitors, are one of the main types of capacitors. These capacitors are relatively small, lightweight and have a wide range of applications. 223MMR250K is one of the most popular film capacitors, and its application Field and working principle will be discussed in this article.

Overview

223MMR250K is developed and produced by Fujisoku, and belongs to the film capacitors family. This capacitor is basically composed of a cylindrical dielectric film wrapped in a metal layer, with internal and external electrode layers inside and outside, respectively. It has a capacitance of 0.223μF (μF is the unit of the capacitance in Farads) and a maximum working voltage of 250V (V is the voltage unit). Comparing to ceramic capacitors, film capacitors have better long-term stability, higher maximum working voltage and a lower self-inductance. However, an open-circuit voltage capacity is required for it which limits its application. Besides, film capacitors usually have a cylindrical shape and are much larger than ceramic capacitors, which make it impossible for them to be used in an extremely compact space.

Application Field

223MMR250K film capacitors has a wide range of application areas. Because of its excellent properties, this type of capacitors can be used in different applications and equipment. Some of these applications include:

• Electronic circuits: Mainly used in high-frequency crossover circuits, filters, audio and video circuits, etc.
• Power supplies: Due to its wide range of operating voltages, it is used in power supplies of various voltages and also for demagnetization filtering.
• Oscillation circuits: 223MMR250K film capacitors can be applied in high frequency oscillator circuits and other similar fields.
• Lighting applications: They are used as dimmers and LED light sources, providing the system with stable voltage.

Working Principle

The working principle of 223MMR250K film capacitors can be divided into two parts. The first part is the electrical field of the capacitor. When a voltage is applied across the capacitor, an electric field will be established. This electric field will form an electric dipole, which is composed of a positive charge and a negative charge. As the result, an opposite electric field is produced inside the capacitor due to the presence of both charges. The electric field generated by the capacitor is proportional to the amount of charge and the gap between two electrodes.

The second part of the working principle of the capacitor is the dielectric effect. When a voltage is applied across the capacitor, an electrical field is established and a charge is stored in the capacitor. This will cause the gap between two electrodes to reduce, thus increasing the permittivity of the dielectric. The increasing of the permittivity leads to more charge being stored in the capacitor. Thus, the capacitance of the capacitor is increased, and this is the working principle of all capacitors.

Conclusion

223MMR250K film capacitors are widely used in different applications such as electronic circuits, power supplies, oscillation circuits and lighting applications. This type of capacitor is much better than ceramic capacitors in many performance aspects, but an open-circuit voltage is needed to use it, and it also can not be used in an extremely compact space due to its larger size. The working principle of the 223MMR250K film capacitor is based on both the electrical field and the dielectric effect.

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