477BPA016M

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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors (AECs) are a family of polarized capacitors, which have an anode made from a pure aluminum foil with an etched surface. The oxide layer formed on the anode surface is the dielectric of the capacitor. A liquid or solid electrolyte covers the oxide layer, serving as the cathode. Due to their large capacitance and low cost, AECs are widely used in the electronics industry.

477BPA016M application field and working principle

The 477BPA016M is an AEC capacitor manufactured by Nichicon. Its type designation is 477BPA016M, where 477 stands for its diameter of 4.7 mm, BP stands for the snap-in terminal type, A stands for the radial lead type, 016 stands for its capacitance of 16uF, and M stands for its rated voltage of 10V.

This capacitor is widely used in the audio field, such as audio filters, hi-fi amplifiers and TV sets. It is also used in industrial control power supplies and motor control circuits.

In terms of working principle, AECs utilize the capacitance formed by two metal plates with a dielectric material such as an oxide film in between them. When a voltage difference is applied to the two plates, a capacitance forms which stores electrical energy. As such, AECs work by obtaining the charge between two metal plates, separated by a thin layer of dielectric material which can be polarized by the voltage.

AECs are also called polarized capacitors, as the applied voltage must not exceed the rated voltage. This is due to the fact that the electrolyte solution used to form the cathode side of the capacitor can deteriorate when over-voltage is applied, leading to a loss of capacitance.

Furthermore, AECs also have a very low self-inductance due to their short-circuit construction, and have good internal resistance characteristics which prevent voltage drops.

In summary, the 477BPA016M is an aluminum electrolytic capacitor produced by Nichicon and is widely used in audio equipment, industrial control power supplies and motor control circuits. This capacitor is polarized and has very low self-inductance, and its capacitance is critical for the stability and performance of the circuit.

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