E37F451CPN123MFF5M

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Aluminum electrolytic capacitors, commonly known as electrolytic capacitors, are passive components which use the electric double layer formed on the surface of dielectric oxide film as the capacitance element. The type code of aluminum electrolytic capacitor has a specific meaning, such as E37F451CPN123MFF5. The first alphabet letter shows the polar symbol of the capacitor, in this case its an E, meaning its an electrolytic capacitor. The second letter F represents the size of the case, followed by 4 digits that represent the capacity in micro-farads. C, P and N represent capacitance tolerance code, temperature coefficient and voltage rating codes respectively. The following letter M, followed by 5 digits, represents the voltage rating of the capacitor in volts.

The aluminum electrolytic capacitor is widely used in many electronic products, such as CD/DVD player, MP3 player, cordless phone, electronic valve amplifier and so on.

The aluminum electrolytic capacitor mainly consists of the anode diaphragm, the anode, the insulating layer, the cathode, and the outer aluminum shell. During the manufacturing process, aluminum oxide is first formed on the surface of the aluminum foil by anodizing. The anode is then housed in a metal case and sealed with a rubber plug. The space between the anode and the cathode is filled with an electrolyte solution, which completes the formation of the electric double layer, thus forming the dielectric oxide layer.

In operation, the electric charges stored on the surface of the dielectric oxide layer establish an electric field whose intensity is proportional to the capacity of the device. The external electric field is introduced by the alternating current or the direct current, and the capacitor can be made to oppose or survive the effective current. In this way, the capacitor can be used for filtering, coupling or smoothing of the participating signals, or for dynamic storage.

The most common application of aluminum electrolytic capacitors is in the filter circuit, which is mostly used as a low pass filter. Compared to other capacitors, aluminum electrolytic capacitors have the advantages of large capacity and high capacity values, but they have a shorter operating life and slighter leakage currents. Additionally, aluminum electrolytic capacitors are also widely used as coupling devices between AC/DC and for smoothing.

To summarize, aluminum electrolytic capacitors are a type of capacitor whose working principle is based on the electric double layer formed on the surface of dielectric oxide film. E37F451CPN123MFF5M is an aluminum electrolytic capacitor which is widely used in CD/DVD players, mp3 players and other electronic products. Its commonly used for filtering, coupling and smoothing of signals.

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