400AX8R2MEFC8X16

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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors use a non-solid, electrolyte-soaked paper separator to create a larger space between the two metal plates than in a solid tantalum capacitor, allowing more capacitance in a smaller package.

The 400AX8R2MEFC8X16 is a radial lead, two-end-play aluminum electrolytic capacitor from Panasonic Electric Works. It has an operating temperature range of -40°C to +85°C, and is self-healing, meaning a short circuit can occur and will not damage the capacitor.

Application Fields

The capacitor is mostly used with dc-dc converter products, or high-efficiency LED driver products, thanks to its ability to absorb high voltage passing through. It is also suitable for any power circuit, thanks to its high stability and low ESR. Other application fields include space-saving and low-profile products.

Working Principle

The working principle of this type of capacitor is based on the classic electrostatic charge process. When a voltage is applied, a separation of charges begins, which creates a capacitance and a field between the plates. The capacitance is a measure of the ability of the capacitor to store the energy for a short period of time. The field is responsible for maintaining the charges in the two metal plates and preventing their flow.

The capacitor also has a dielectric, which is an insulating material, usually aluminum oxide, which separates the two metal plates. The dielectric is created by chemical reaction between the electrolyte and the aluminum foil plates. This chemical reaction creates an oxide layer, which is responsible for keeping the separation between the two metal plates, and thus increase the capacitance.

The capacitor is also self-healing, meaning that if a short circuit occurs, the current between the plates will be limited, the electric field will be weakened and the chemical reaction between the electrolyte and the aluminum will create a larger dielectric layer, which will increase its capacitance.

This aluminum electrolytic capacitor is an ideal choice for applications that require a high degree of reliability, as well as those requiring high current flow and high stability. The device also provides good temperature stability, long life, and low ESR.

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