ALS81A163NJ200

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Aluminum electrolytic capacitors are a type of capacitor that has the most application fields and usage worldwide. The ALS81A163NJ200 is a widely used aluminium electrolytic capacitor that has a long list of possible applications. This article is an overview of the technology, application fields of the ALS81A163NJ200 and the working principle.

Aluminum electrolytic capacitors are often used in power supplies, for bypassing and decoupling circuits, filtering, motor power supplies, and snubbers. Compared to other dielectric capacitors, these capacitors are characterized by their long lifespans, low electrical leakage, and high capacitance values for a given configured size. Unlike other dielectric capacitors, aluminum electrolytic capacitors require voltage and current of direct current for operation.

The ALS81A163NJ200 is a radial aluminum electrolytic capacitor. It operates at a rated voltage of 200V. Its dimensions are 11X17.5X17.5mm. It has a rated capacitance of 160uF and a temperature range of -55°C to +105°C. The ESR (Equivalent Series Resistance) of the capacitor is 10mΩ and it israted for an insulation resistance of ≥3600MΩ. Its applications can range from TVSETS, DVD players, motor speed controllers, and variators to digital camera power supply circuits and audio devices.

The working principle behind these capacitors is relatively easy to understand. Aluminum electrolytic capacitors consist of two metallic foils which contain porous insulating material separating them. One of these two plates is coated with a metal oxide to serve as a dielectric. These two plates are then rolled together, placed within a cylindrical container, which is then filled with electrolyte, usually containing a solvent. In modern capacitors, the electrolyte is a combination of boric acid and ethylene glycol. When a voltage is applied across the capacitor, the charge carriers (mostly electrons) in the metal oxide layer, which are free to move, will undergo an action similar to a layer of semi-conductors. The charge carriers serve to bridge the plate gap in the capacitor.

The charging current that is produced from the application of a direct current voltage will cause the metal oxide layer to be charged. This causes a dielectric field upon the plate resulting in a charge storage. The stored electrical energy is found in the electrical double layer between the two plates. With the combination of the two plates, the oxide layer, and the electrolyte, the ALS81A163NJ200 is capable of withstanding the rated voltage provided.

Aluminum electrolytic capacitors, like the ALS81A163NJ200, are excellent choices for applications requiring large capacitance in relatively small capacitors. Their life spans can range from about 1,000 hours to up to 10,000 hours for some models, and their temperature range allows for operation in environments as low as -55°C. These capacitors are stable and generally free from aging, except in cases of high temperature and excessive current.

In conclusion, the ALS81A163NJ200 is a popular aluminum electrolytic capacitor that is capable of handling up to 200V and can be used in a wide variety of applications such as motor speed controllers, varistors, and audio devices. The working principle of the capacitor is easily understood, starting with two metallic foils with a porous insulating material between them, coated with a metal oxide serving as the dielectric. When a direct current is applied, an electrical charge is stored in the electrical double layer between the two plates and a dielectric field is produced.

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