381LX121M400K012

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Aluminum Electrolytic Capacitors are one of the most common types of capacitors used today. They are composed of two electrodes held in close proximity by an electrolyte. The electrodes are usually made from aluminum or other conductive metals and the electrolytes are generally an acidic solution. Aluminum electrolytic capacitors are used in many applications including power supplies, DC motor control and filtering.

The unique feature of the aluminum electrolytic capacitor is its high capacitance, which is attributed to its cylindrical construction. This allows for an increased surface area on the electrodes, thus increasing the capacitance of the capacitor. The capacitance is measured in Farads (F) and units of microFarads (μF). For example, a capacitor with a value of .381LX121M400K012 has a capacitance value of 12,100μF.

The most common application of aluminum electrolytic capacitors is in power supplies, where they are used for peak current protection, filtering and rectification. Due to their high capacitance, they are also used in DC motor control circuits for filtering out noise. The other most common application is as energy storage devices in cell phone batteries and digital camera flash circuitry.

The working principle of aluminum electrolytic capacitors is based on the fact that electrons will transfer from one electrode to the other when a voltage is applied across the terminals. When a direct current is applied to the capacitors, the excess electrons flow from one electrode to the other. This creates a background charge and a uniform electric field between the two electrodes.

When an alternating current is applied, the electric field changes in proportion to the current and the charge on the electrodes also changes. This results in a change in the capacitance of the capacitor. This is why aluminum electrolytic capacitors are used in circuits where the current changes rapidly, such as power supplies, motor control and sine-wave conversion.

Aluminum electrolytic capacitors have a wide variety of applications and are used in many different types of applications. The most common types of aluminum electrolytic capacitors include radial leaded capacitors, axial leaded capacitors, smd capacitors, snap in capacitors and screw terminal capacitors. Each type has its own advantages and disadvantages that should be understood before selecting the correct type for a given application.

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