E36D451HPN822MEM9Q

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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are electronic components that enable a direct energy transfer between electric and electronic circuits. They are made up of an outer casing (anode), an inner dielectric (cathode) and an electrolyte between the two. They are used in various applications such as capacitors for power supplies, motors, and resistors.

E36D451HPN822MEM9Q is an example of an aluminum electrolytic capacitor. It is a radial lead polarized capacitor with a rated voltage of 250 volts DC and a rated capacitance of 4.7uF. It has a lead pitch of 2.5mm and a capacitance tolerance of ±20%.

Application Field and Working Principle

Aluminum electrolytic capacitors are widely used in various applications to store electrical energy in the form of an electric field. They are mainly used in current sensing, power supply filtering, coupling, bypassing, decoupling, signal processing, motor controlling, and noise prevention.

The working principle of aluminum electrolytic capacitors is based on Faraday’s law of electrostatics, which states that when two conductive plates separated by an insulator are charged, an electric field is created between them. The capacity of the capacitor is directly proportional to the plate area and inversely proportional to the distance between them.

An aluminum electrolytic capacitor operates on the principle of charge separation between its anode and cathode. The anode is electroplated with an electrolyte, and the cathode is insulated from it. When current is applied, ions from the electrolyte are attracted to the anode plate creating a positive charge and a counter-charge is induced on the bottom plate resulting in a negative charge. This creates an electric field between the plates and stores electric energy in the capacitor.

The capacitance of the capacitor is determined by the effective plate area and the distance between the plates. It is also important to note that the maximum voltage the capacitor can withstand will depend on the applicable voltage class and electrolyte properties.

Aluminum electrolytic capacitors can also be used in an RC (resistor-capacitor) circuit. In this application, the capacitor is used as a filter, allowing AC signals to pass while blocking DC signals. This helps to reduce interference caused by high voltage pulses or power spikes.

Aluminum electrolytic capacitors are used in various industries and are available in multiple sizes and capacitance values. They offer various advantages such as high capacitance value, the capability to operate at high voltages, long lifetime, stability, and low leakage current.

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