KY25VB47RM5X11LL

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Aluminum Electrolytic Capacitors are a type of electrical capacitor which uses aluminum oxides as its main active component. This type of capacitor is popular due to its large capacitance per unit volume. One such capacitor is the KY25VB47RM5X11LL.

The KY25VB47RM5X11LL is a type of aluminum electrolytic capacitor, made by Vishay Intertechnologies, and has the following dimensions: 25 mm diameter, 47 mm in length and 11 Lead Spacing. It has a maximum Impregnation Voltage of 350V, and a maximum working voltage of 450V.

The main application of the KY25VB47RM5X11LL aluminum electrolytic capacitor is in power supply systems as a filter, regulator and bypass circuits, thus basically for applications that utilize AC power. Its primary purpose is to provide a ‘smoothing’ effect, ensuring that the AC line voltage does not have too much ripple, and ensuring that the DC voltage output does not contain spike. A schematic of this type of circuit is shown in Figure 1.

Figure 1: Typical circuit diagram with aluminum electrolytic capacitor in a power supply system

The KY25VB47RM5X11LL aluminum electrolytic capacitor also has other uses such as in audio systems, and as a voltage limiting device in switch mode power supplies. Its primary application though, is as a filter to improve the AC line voltage and DC voltage output of power supply systems.

The working principle of an aluminum electrolytic capacitor is based on Faraday’s Law of Electrolysis. This law states that when a voltage is applied across two electrodes immersed in an electrolyte, a current will flow and a chemical action will take place. This chemical action is the formation of aluminum oxide on the positive electrode. The oxide layer has a higher dielectric constant than the electrolyte, thus creating a capacitor.

The most important characteristic of an electrochemical capacitor is its capacitance. The higher the capacitance, the more charge it can store. Capacitance is proportional to the area of the electrodes, the distance between the electrodes and the type of dielectric material (in this case, aluminum oxide) used. The KY25VB47RM5X11LL aluminum electrolytic capacitor has a rated capacitance of 100 μF.

Apart from capacitance, other characteristics of aluminum electrolytic capacitors include leakage current, ESR (equivalent series resistance) and dissipation factor. Leakage current refers to the current flowing through the capacitor when the voltage across it is zero. ESR is the ratio of the total resistance of the capacitor to its capacitance, and the dissipation factor is a measure of how much power is lost due to heat. The KY25VB47RM5X11LL has an ESR rating of 1.52 Ω at 120 Hz and a dissipation factor of 0.1% at 120 Hz.

In conclusion, the KY25VB47RM5X11LL aluminum electrolytic capacitor, manufactured by Vishay Intertechnologies, is a commonly used component in power supply systems due to its large capacitance, low resistance and low dissipation factor. It is also used in audio systems and switch mode power supplies. Its working principle is based on the Faraday’s Law of Electrolysis, which states that when a voltage is applied across two electrodes immersed in an electrolyte, a chemical action will take place that will create a capacitor.

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