450KXW150MEFC18X40

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Aluminum electrolytic capacitors, designated by the acronym AEC, are essential components of power electronics applications and what enables those application to perform their intended purpose. The number 450KXW150MEFC18X40, is an identifier specific to the type of aluminum electrolytic capacitor and helps to identify it.

Aluminum electrolytic capacitors are components that are composed of one or two aluminum foils with an electrolyte between them. To help create a larger surface area, the electrodes are designed as a rolled up cylinder, similar to a jelly roll. A dielectric material (the electrolyte) is then applied between the two electrode layers, which aids the capacitor in exhibiting the characteristic of having a large capacity per volume, something that is highly desirable in electronics applications.

The identifier 450KXW150MEFC18X40, helps to specify the size and function of an aluminum electrolytic capacitor. Even these specific characteristics changes depending on manufacturer, they generally represent the following:

• 450 – Number of micro Farads that the capacitor produces.
• KXW – Maximum voltage rating of the capacitor.
• 150 – Surge or peak voltage.
• MEFC – Cylinder shape of the capacitor with “E” denoting an extended length.
• 18 – Diameter of the cylinder in millimeters.
• 40 – Height of the cylinder in millimeters.

The capacitance and voltage ratings of the aluminum electrolytic capacitor, along with its size, determines the number of applications they are suitable for. This range of capacitor capacities can be rated from 1uF to 200,000uF, with an operation voltage range from 2V up to 500V.

The 450KXW150MEFC18X40 aluminum electrolytic capacitor can be used in a variety of applications. Some typical applications that may use these capacitors include:

• DC/DC Converters
• Switching Power Supplies
• Line Filter Applications
• Motor Drive
• Inertia Systems

The working principle of an aluminum electrolytic capacitor is based on the same physics used to create an electric battery. The electrode layers, or anode and cathode, contain an electrolyte, which creates an electric charge when voltage is applied. The difference here is that the electrolyte is non-conductive, which is why the anode and cathode must form a direct contact to release the electric charge.

The electrolyte also acts as a dielectric and helps create a charge storage between the two electrode layers. As voltage is applied, the capacitor will begin to store electric energy in the same principle as a battery. When the voltage is no longer applied, the capacitor will then slowly discharge its stored energy until it is completely empty.

Aluminum electrolytic capacitors are an essential component for power electronics applications. With the many characteristics that can be specified – such as size, capacitance, voltage rating, and more – the 450KXW150MEFC18X40 aluminum electrolytic capacitor can easily be used in many different power applications. The unique dielectric and electrolyte properties help to create a high-capacity storage solution for electricity, making it a vital tool for many electronic projects.

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