KY25VB562M18X40LL

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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are polarized electrolytic capacitors whose anode electrode (+) is made of a pure aluminum foil with an etched surface. The etched aluminum forms a very thin insulating layer of aluminum oxide which acts as the dielectric of the capacitor. The layer of aluminum oxide is very thin, typically around 0.5-2 nanometers thick.

The second electrode of the capacitor is the cathode (-), which consists of a metal layer and two electrolyte layers. The metal layer typically consists of a conductive material such as nickel, silver, or gold, and can also be mixed with other metals and materials such as zinc, zinc oxide, tin, and aluminum. The electrolyte layers help to improve electrical contact between the anode and the cathode, and they also act as a buffer to protect the aluminum oxide layer from any damage.

KY25VB562M18X40LL is an aluminum electrolytic capacitor with an 18mm diameter. It has a rated working voltage of 200 V and is suitable for applications in DC power supplies, switching power supplies, and instrument amplifiers. Its long life and high temperature range make it an ideal choice for applications that require a high degree of reliability.

Working Principle

The working principle of the KY25VB562M18X40LL aluminum electrolytic capacitor involves two distinct processes: the formation of the anode and the formation of the cathode. During the formation process, an aluminum oxide layer is formed on the surface of the anode electrode. This layer of oxide acts as the dielectric of the capacitor and is responsible for the electrical insulation. As a result, current can only flow from the anode to the cathode, not the other way around.

The size of the aluminum oxide layer also affects the capacitance of the capacitor. The larger the oxide layer, the higher the capacitance. The capacitance is determined by the ratio between the anode surface area and the thickness of the oxide layer. When the ratio is larger, the capacitance is higher. This is why the KY25VB562M18X40LL aluminum electrolytic capacitor has an operating voltage of 200 V – it has a large oxide layer that allows it to handle larger voltages.

During the formation process, a metal layer is also formed on the cathode. This layer can be composed of materials such as nickel, silver, or gold, which are highly conductive materials and as a result, can improve the electrical contact between the anode and the cathode. In addition, the electrolyte layers of the cathode help to protect the oxide layer from damage. All of these components work together to create a reliable and efficient capacitor.

Application field

Due to its long life and wide temperature range, the KY25VB562M18X40LL aluminum electrolytic is commonly used in a variety of applications. The most common applications include DC power supplies, switching power supplies, and instrument amplifiers. It can also be used in a variety of other applications, such as motor drives, AC line filtering, and audio equipment.

In addition to its wide range of applications, the KY25VB562M18X40LL aluminum electrolytic capacitor is also popular for its good capacitance stability over a wide temperature range. It also has a good ripple current capacity and can handle large amounts of surge current. All of these features make it a great choice for applications that require a high degree of reliability.

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