MKT1813368404G

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Film capacitors, have been established for many years and are widely used for many different applications. The MKT1813368404G is one such example of a film capacitor, and this article will cover its application field and the principles of its working.

Film capacitors are typically divided into two types: polyester film capacitors and polypropylene film capacitors. The distinction between the two is based on their dielectric materials, with polypropylene having a higher breakdown voltage than polyester. The MKT1813368404G is a polyester film capacitor, making it ideal for use in power and signal filtering applications, as well as for bypass, coupling, and AC rectifier applications.

The construction of the MKT1813368404G is a combination of two layers of Mylar polyester film that is sandwiched between two layers of a very thin layer of metallized aluminum to form a metalized film capacitor. This construction is what allows the capacitor to have a low ESR and a high self-healing capacity. The metalized film acts as the dielectric while the thick layer of Mylar polyester provides the stability under high AC voltages. The metallization also ensures that the capacitor maintains a good voltage-resistance characteristic.

The working principle of a film capacitor is based on the process of dielectric absorption. As an electrical current is applied to the electrodes of a capacitor, the molecules of the dielectric material move in relation to each other, resulting in an increase in the stored electric charge. The energy stored between the electrodes is inversely proportional to the space between them - the greater the distance, the lower the charge.

In the MKT1813368404G, this distance is managed by the polyester Mylar film and the metalized aluminum layer sandwiched between the layers. The Mylar film provides a stable and consistent distance between the electrodes while the metalized aluminum acts as an electrical conductor, allowing the current to flow. This effectively increases the stored electric charge while maintaining a stable distance between the electrodes.

The advantages of a film capacitor such as the MKT1813368404G, include: high insulation resistance, low ESR (equivalent series resistance), low inductance, low signal distortion, low self-inductance, high current handling capacity, and high thermal stability. All of these characteristics make this capacitor suitable for use in applications such as power electronics, automotive electronics, power supplies, loudspeakers, and AC line filters.

In summary, the MKT1813368404G is a polyester film capacitor, suitable for use in a variety of applications, from power and signal filtering, to bypass, coupling, and AC rectifier applications. It is constructed using two layers of Mylar polyester film and a layer of metalized aluminum, and its working principle is based on the process of dielectric absorption. The advantages of this capacitor include a high insulation resistance, low ESR, low inductance, and high current handling capacity.

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