MKT1817233404W

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Film capacitors, a type of capacitors, also known as polyester film capacitors or plastic film capacitors, are one of the most used electrical components. They are constructed from layers of thin plastic film, often polyester, that is completely insulated from other layers by layers of vacuum-deposited metal electrodes. These "sandwiches" of film and metal are rolled into one form and encapsulated in electrically nonconductive materials, often acrylic or Maycolite, to form the capacitor.

MKT1817233404W is an example of a film capacitor with an operating voltage of 400V DC and 3300μF capacitance. This particular film capacitor is suitable for applications including power supply filter, high-voltage DC circuit, and LED lighting, and can be found in the microphone, phonograph, and lighting circuits of various electronic devices.

The working principle of a film capacitor is quite simple. The dielectric layers used in film capacitors act as an insulator between the two metal electrodes. A charge applied to one metal electrode will form a field inside the dielectric layers which results in a charge - both positive and negative - being induced on the opposite metal electrode. This phenomenon is known as "capacitance," and it is the basis for the functioning of a film capacitor.

The capacitance of a film capacitor is determined by its geometry, material, and dielectric constant. The capacitance is the amount of charge stored between two metal electrodes when a voltage is applied across them. As the dielectric layers store the charge, the amount of capacitance is determined by the length and width of the film as well as the material used in the dielectric layers and their dielectric constant. The operating voltage of a film capacitor is determined by its ability to handle voltage between the two metal electrodes, and its ability to withstand the voltage applied without rupture.

It is important to remember that film capacitors are non-polarised, meaning that the two conductors are not labelled "+" and "-"; the voltage can be applied in either direction. Furthermore, they should be used in DC circuits as they are not suitable for AC applications due to their series inductance, low frequency drift, and absence of self-healing properties.

Film capacitors are robust components used in a wide variety of applications, and the MKT1817233404W is no exception. With an operating voltage of 400V DC and 3300μF capacitance, it’s suitable for various applications making it a great choice for power supply filter, high-voltage DC circuit, and LED lighting applications. Not only that, but it also features a non-polarised design which means that it can be used in both AC and DC circuits.

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