185103J400RFA-F

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Film capacitors are an electronic component that stores and releases electrical energy. They are made up of two conductive plates separated by an insulative material. When voltage is applied to the component, the available electrical charge is stored on the plates and an electric field is created due to their separation. These fields act as an intermediary between the plates and will store energy until it is needed. The capacitance of a film capacitor is determined by the size and shape of the plates, the distance between them, and the type of insulative material used.

185103J400RFA-F is a film capacitor family from Kemet, it is typically suited for DC-link capacitors, pulse power, motor drive and switching power supply applications. This product family of Kemet Electrolytic Capacitors offers features that provide a highly effective solution for high capacitance, space saving, high temperature operation with lower equivalent series resistance (ESR).

The dielectric for this series of capacitors is a Metallized Polypropylene Film (PP). It has a small size and low ESR as well as self-healing properties. The electrodes of the capacitor are Electrodeposited Nickel Barrier (ENi) electrodes, giving excellent solderability and providing high accuracy and repeatability of capacitance characteristics. The capacitors also have a very low inductance, making them ideal for applications such as RF communication, signal coupling, and power filtering.

The working principle of this capacitor is based on Faraday\'s law of induction, which states that when an electric current flows through a conductor, a magnetic field is created around it. This field induces a voltage in the conductor, thus allowing the capacitor to store energy. By creating an electric field between the two electrodes, electric charges can be stored and released when necessary. This is why the capacitance of a film capacitor is determined by the size and shape of the plates, the distance between them, and the type of insulative material used.

In a DC-Link capacitors, they are typically used to reduce current ripple and smooth the current in power supply applications or in the output stage of switching converters. The film capacitors act as a filter and stores energy during the interval when the load is not drawing current and releases it when extra current is required. The device also helps to reduce voltage noise, also known as “buzzing” as this type of film capacitors prevents the current generated by the switching power supply from interfering with other devices.

The pulse power application of this film capacitor family is very useful in providing a maximum energy storage capability in a short period of time. It is ideal for applications such as radar systems, detonator circuits, and other high current, high frequency applications. The motor drive application of this product family can be used for motor drive control capacitor in terms of voltage waveform improvement, noise blocking, power compensation, phase-shifting, and power factor optimization.

In conclusion, the 185103J400RFA-F film capacitor family from Kemet is an excellent choice for a wide variety of applications requiring high capacitance in a small package. It is important to understand the working principle of the capacitor and how it can be applied depending on the type of application. The device provides very high accuracy and repeatability of capacitance characteristics and is capable of providing a low impedance solution with very low ESR.

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