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Aluminum Electrolytic Capacitors

The EMVE630ADAR47MD55G aluminum electrolytic capacitor is anelectrolytic type capacitor used for a variety of high andlow-frequency applications.
In a basic aluminum electrolytic capacitor, an anode (positiveterminal) consisting of aluminum plate is separated from a cathode (negative terminal) consisting of aluminum foil plated in a layer of electrolyte. Voltage applied to the aluminum plates causes the formation of an oxide barrier along the surface of the anode, which prevents the electrolyte from dissipating the charge.

Application field

Aluminum electrolytic capacitors are characterized by their largecapacitance values and wide range of working voltages. Because of this, they are used in a variety of applications, both analog and digital, that require large capacitance values for filtering and buffering current. Examples include power supplies, LED lighting, audio filters, and voltage stabilizers.

Working Principle

The working principle of an aluminum electrolytic capacitor is basedon two distinct yet related processes. The first process is the formation of an anode oxide layer on the surface of the anode. This layer serves as a barrier to protect the electrolyte solution from disturbing the electric charge stored in the capacitor. As a result, the capacitor’s capacitance value remains stable even under repeated voltage pulsing, which would otherwise cause the current to decay.

The second process involves the formation of a cathode oxide layer on the surface of the cathode. This oxide layer serves two purposes: first, it protects the electrolyte from the current that is being supplied to the capacitor; and second, it acts as an active element in influencing the capacitance value of the capacitor. When voltage is applied across the terminals of the capacitor, the cathode oxide layer allows electrons to travel from the cathode to the anode, thus creating a net electric charge. This charge is stored in the capacitor until the voltage is released, at which point the cathode oxide layer re-insulates the electrolyte and the charge dissipates.

In addition to these two processes, the EMVE630ADAR47MD55G also incorporates a third process to increase its capacitance values. Micro spacer technology is utilized to create a thin dielectric layer between the anode and cathode layers. This increases the overall capacitance of thecapacitor without significantly increasing its size.

In summary, the EMVE630ADAR47MD55G aluminum electrolytic capacitor is anelectrolytic type capacitor that incorporates advanced technologies to provide reliable performance in a variety of high and low-frequency applications. Its combination of large capacitance values, wide working voltage range, and micro spacer technology make it well suited for use in power supplies, LED lighting, audio filters, and voltage stabilizers.

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