LGU1V682MELB

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Aluminum Electrolytic Capacitors – LGU1V682MELB Application Field and Working Principle

Aluminum electrolytic capacitors are the most widely used type of capacitors in the world and their popularity is due primarily to their low internal resistance and cost effectiveness. The LGU1V682MELB type of aluminum electrolytic capacitor is a high-reliability device, with a long cycle life, and extremely low leakage. Its application fields and working principle are now explained in detail.

Application fields

Aluminum electrolytic capacitors of the LGU1V682MELB type are specifically designed for use in high-reliability applications such as power supplies, motor drives, and other low-voltage electronic control circuits. With an especially thin insulation film, the capacitors are suited for applications in which long-term reliability and ride-through of load variations are critical.

Most applications for the LGU1V682MELB type aluminum electrolytic capacitor are in the industrial and medical fields, where long-term reliability and safety of components is essential. For instance, the capacitor is often found in cardiac pacemakers, making it an ideal selection for any application in which field reliability and precision are top priorities.

Working principle

An aluminum electrolytic capacitor is constructed with two aluminum foil collectors, each coated with a thin layer of insulating oxide, and sandwiched together with a dielectric material that acts as an insulator between them. These foils are also etched to form many individual capacitors on one carrier. The capacitor is then sealed in an electrolyte, before being hermetically sealed and potted.

When a voltage is applied across the terminals, one of the foils becomes positive and the other negative. The dielectric material is polarized and a dielectric field is generated between the two foils. This field creates a capacitance and stores the electrical charge.

The electrolyte in the aluminum electrolytic capacitor acts as a reactant in preventing the oxidization of the aluminum foils. The capacitance, ESR (Equivalent Series Resistance), and life of the capacitors are mainly governed by the aluminum foil, dielectric, and electrolyte. The charge-discharge characteristic is very good, and the leakage current is very low.

The LGU1V682MELB aluminum electrolytic capacitors are designed to be exceptionally reliable under arduous conditions. The high-reliability device is designed to have a long cycle life of up to 2000 hours at full rated voltage, and leakage current down to a fraction of a microampere.

The technology employed in LGU1V682MELB capacitors also ensures extremely low impedance values at high frequencies. This characteristic makes the capacitors an ideal selection for use in switching power supplies, medical and industrial applications, and other situations that require significant signal processing.

In summary, the LGU1V682MELB aluminum electrolytic capacitor is an excellent choice for applications requiring reliable quality, long cycle life, and low leakage operation. With its robust construction and reliable characteristics, it serves as one of the most versatile and widely used elements in aluminum electrolytic capacitors.

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