MAL214896225E3

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Aluminum electrolytic capacitors, also known as solid aluminum electrolytic capacitors or aluminum extra-long-life capacitors, are capacitors in which the anode aluminum foil is anode-electrolytic-oxidized (AAO), oxidized to form a porous layer, and then soaked in an electrolyte. Typically, an aluminum foil that serves as an anode is etched with a pattern, rolled up or connected with the ends at right angles, and then wound with a pair of aluminum foils that serve as a cathode. The anode foil is then soaked in an electrolyte, to form a porous oxide film on the anode foil, making it a dielectric. The typical applications include audio, automotive, computer, and telecommunication equipments such as TV, VCR, CD players, etc.

The MAL214896225E3 aluminum electrolytic capacitor is an ultra high frequency, ultra high capacitance, miniature surface mount type aluminum electrolytic capacitor. It is designed for applications such as cellular phones, PDAs, digital cameras, and other small portable electronic devices. It has a small size and offers a high capacitance value making it suitable for high frequency applications. The capacitance range is from 1uF to 470uF allowing for selection of the appropriate capacitance value for the application. Additionally, the ESR (Equivalent Series Resistance) value is low, allowing for low power loss and a high level of efficiency.

The working principle of the MAL214896225E3 aluminum electrolytic capacitor is based on the physical principle of dielectrics, e.g. a dielectric substance is an insulating material that can be polarized with an electric field and as a result, it can store electrical energy. Polarization occurs due to the repulsion between the positive and negative charges of the substance. The dielectric material in an electrolytic capacitor consists of an anode aluminum foil, which is anode-electrolytic-oxidized, through which an electric current is passed. This causes the anode foil to oxidize, forming a porous oxide film on the anode foil, and this serves as a dielectric.

Additionally, a positive charge is induced on the anode, while a negative charge is induced on the other electrode of the capacitor, and this gradient allows for the accumulation of charges in the capacitor. The plate capacitor is placed in an electrolyte, which serves to create a connection between the two electrodes, and with the application of an electrical field, charges begin to accumulate. Thus, charging current is allowed to flow through the capacitor, and this can be maintained for a certain amount of time, due to the low leakage current of the capacitor.

In conclusion, the MAL214896225E3 aluminum electrolytic capacitor offers a small size, reliable performance, and low ESR value making it suitable for applications such as cellular phones, PDAs, digital cameras, and other portable electronic devices. Its working principle is based on the physical principle of dielectrics, whereby its anode aluminum foil is anode-electrolytic-oxidized, thereby allowing for the accumulation of charges in the capacitor under the application of an electric field.

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