SN471M016ST

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Aluminum electrolytic capacitors are an important class of capacitors which are used to store energy temporarily and to produce a signal with controlled characteristics. SN471M016ST is a device of this type which has a wide field of application and a clear working principle.

In general, the metalized electrolytic capacitors made from Aluminum have the features of high capacitance, high frequency, low ESR and consequent extended life. SN471M016ST is a polarized aluminum electrolytic capacitor and is especially suitable for an audio-frequency and video-frequency bypass circuit. It is particularly effective for decoupling and filtering on high frequency and its rated voltage can be up to 25VDC. This product can also use for blocking, buffering, and coupling applications.

The device is made from a stainless steel cylinder with a thin layer of a rolled anode foil of pure aluminum and an electrolyte. The electrolytic capacitor is wound with a dielectric of paper or an impregnated sealed film. On the anode side the terminal fixture provides pressure contact to the steel cylinder, allowing the foil to deform and to make contact with the cathode contact which is connected to the center terminal. The capacitor is polarized, and has a positive and negative terminal with clearly marked positive and negative poles.

The electrolyte is a mixture of water, alcohol and rare earth elements such as beryllium, calcium, cobalt, and zinc. The electrolyte and the aluminum foil form two electrodes are connected to each other by a hydrogen precursor. The electrolyte is also capable of storing electrical charge and allowing current pass.

When electricity is applied, electrons move from the negative terminal to the positive one, while ions in the electrolyte are attracted to the anode, creating a layer of ions on the anode and an electric field between the electrodes. This process is considered as a build-up of an invisible dielectric layer on the anode surface which prevents current flow. As long as the electronic supply to the device is stable, the electrons on the anode and those leaving the cathode are equal and thus an electrical field is created which prevents further current flow.

At the moment of electrical overload, a rapid chemical reaction in the electrolyte leads to a very rapid current flow, thus preventing the device from overheating and damages. This is a very important safety feature of the capacitor which provides robust protection. Also, as the device has no mechanical parts, it can be used in applications where vibration might be a problem.

In conclusion, SN471M016ST is a specialized aluminum electrolytic capacitor which has a variety of potential uses in both audio and video applications. It has a working principle based on the build-up of an invisible dielectric layer which prevents electrical current moving between the anode and cathode. This device also has a high capacitance, high frequency, low ESR, extended life and inherent safety features, making it an ideal choice for many applications.

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