MKT1817210014W

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Film capacitors, sometimes referred to as plastic dielectrics, are the most widely used capacitors in electrical and electronic devices. The MKT1817210014W series from the well-known capacitor manufacturer Kemet is a good example of such capacitors. The MKT1817210014W series belongs to the MKT family of polymer film capacitors, which combines excellent electrical characteristics with a high degree of reliability and robustness.

Application Field

The MKT1817210014W series of capacitors is designed for general-purpose and high-frequency applications. It is ideal for applications that require high capacitance values, large temperature range, low loss, and a high self-healing ability. This series of capacitors can be used in a wide range of applications such as switch-mode power supplies, telecom/networking, and motor control. In addition, it also can be used in medical and automotive electronics, consumer electronics, and more.

Working Principle

The MKT1817210014W capacitors are designed using polypropylene film and a polyester film as its dielectric. This combination of two dielectric materials results in a capacitor with high electrical performance and improved temperature stability. The polypropylene film is highly resistive to heat, shock, and vibration and also has a low dielectric loss. The polyester film provides mechanical stability with excellent self-healing properties.

The capacitance of the MKT1817210014W series is achieved by metallizing the polypropylene and polyester films. The metal layers absorb the electricity and store it. The metal layer is then insulated by the dielectric material, which allows the charge to build. When the capacitor is subjected to a voltage, the stored charge is released in the form of current. This process is reversed when the voltage is removed, and the capacitor charges back up to its original value.

The MKT1817210014W film capacitors are also designed to be robust and reliable. The self-healing nature of the polyester film helps to protect the capacitor from damage due to voltage spikes and transient events. The dielectric layers are sealed in an epoxy package for added protection against humidity, dust, and other environmental contaminants.

Conclusion

The MKT1817210014W series of film capacitors from Kemet offer superior electrical performance and reliability. The two-layer dielectric and metallized film layers result in a very low loss and excellent temperature stability. The self-healing nature of the polyester film helps protect the capacitor from damage due to transient events. The robust design, epoxy encapsulation, and wide temperature range make this series of capacitors suitable for a wide range of applications including power supplies, telecom/networking, and motor control.

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