MKT1820547254 Datasheet/PDFA film capacitor (MKT1820547254) is an electrical component consisting of a thin, flat plastic film dielectric, which are also called polyester capacitors. It is a fixed-value capacitor with very low dissipation factor. The dielectric films feature low equivalent series resistance and high insulation resistance. Because of this, these capacitors are ideal for audio and frequency-sensitive applications. The MKT1820547254 film capacitors are widely used in AC and DC pulse circuits, coupling and bypass applications, capacitive filters, video, suppression and voltage stable circuits, motor/power inverters, and voltage stabilization circuits.
Applications
The MKT1820547254 film capacitors provide a variety of benefits not only in power electronics but also other applications. In power electronics, they have long lifetimes, have low ESR and are good dissipation factors. They are commonly seen in switch-mode power supplies, uninterruptible power supplies, inverters and AC/DC converters. In consumer electronics, they are often used to smooth the DC voltage, as well as in applications that require modulation and noise suppression.
In gaming, the film capacitors are used for DC smoothing. In automotive electronics, they are used to provide power filtering, voltage reference and suppression, and electrostatic discharge protection. In medical applications, these capacitors are used in defibrillators and other medical devices. In aircraft and military applications, they are used in high-frequency and high-voltage applications.
Working Principle
The dielectric of a film capacitor is typically composed of a polymer film. When an alternating voltage is applied to the capacitor, the dielectric field produces a charge equal to the applied voltage, thus transferring energy from the external circuit to the dielectric. The dielectric becomes polarized, allowing the energy to be stored.
When the voltage reverses, the stored energy is transferred from the dielectric back to the external circuit, working in the opposite direction as a sink. This storage and release cycle happens at every frequency, thus enabling the capacitor to act as a filter to pass certain frequency ranges. This process also dissipates very low amounts of energy.
The MKT1820547254 film capacitors are equipped with a metallized dielectric, which improves their ability to store energy and improves their performance. The metallized dielectric also improves the frequency response of the capacitors.
Conclusion
The MKT1820547254 film capacitors are reliable and convenient components that can be used in a wide range of applications, including power electronics, consumer electronics, gaming, automotive electronics, medical applications, and aircraft and military applications. With their metallized dielectric design, they provide small size and improved performance. That being said, they are perfect for AC and DC pulse circuits, coupling and bypass applications, capacitive filters, video, suppression and voltage stable circuits, motor/power inverters, and voltage stabilization circuits.