B43540E2397M67

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Aluminum Electrolytic Capacitors

An aluminum electrolytic capacitor (Al-EC) is a polarized electrolytic capacitor whose anode electrode is made of a pure aluminum foil with an insulating oxide layer. The oxide layer acts as the dielectric of the capacitor. Al-ECs have relatively large capacitance values in a small package, and their ability to tolerate voltage makes them an ideal choice for applications that require a cell with high capacitance-to-volume ratio. The most common form of Al-ECs is a radial lead type. This type of Al-EC has an insulated lead coming from the anode connecting directly to the circuitry, while the cathode lead is connected directly to the PCB through a conducting element.

B43540E2397M67 Application Field and Working Principle

The B43540E2397M67 is a high ripple current Al-EC designed to replace larger traditional electrolytic capacitors with lower thermal stress. It is available in small surface mount (SMD) and through-hole packages. It features a ceramic core construction, electrolyte-filled dielectric, and a self-healing capability that allows it to endure surge currents. In addition, its leakage current is much lower than traditional electrolytes. With its high capacitance-to-volume ratio, it is suitable for applications such as high speed switching, low-noise power supplies, and electronic ballasts. It is also suitable for power supplies, battery-powered electronic circuits, and appliances.

The B43540E2397M67 works by storing electrical energy in a capacitor by trapping electrical charge between two parallel plates, one of which is made of pure aluminum foil. When the capacitor is subject to a potential difference, a certain amount of electrical charge will flow in the direction of the field lines, creating an electric current. The aluminum foil acts as the anode, which is positive, and the cathode is negative. The potential difference will cause electrons to collect on the anode and leave the cathode. This will result in the accumulation of positive charges on the anode and negative charges on the cathode. The air gap between the two foils and the dielectric acts to insulate the accumulating charges.

The B43540E2397M67 has an improved self-healing capability, which makes it suitable for applications that require high ripple currents. The working principle is similar to other aluminum electrolytic capacitors, where the aluminum foil acts as the anode and the dielectric as an insulator. In case of an overload or surge current, the metal wires inside the capacitor can effectively distribute the heat, preventing the temperature from instantly rising. The heat generated by the current will create micro cracks in the oxidized surface, causing the current to leak and dissipate as heat, which is known as self-healing.

The B43540E2397M67 is a versatile Al-EC with a wide range of uses as it can withstand high ripple currents and supply a large capacitance in a small package. Its self-healing capability makes it an ideal choice for applications requiring reliability and safety. It is suitable for use in high speed switching, low-noise power supplies, and electronic ballasts, as well as a variety of other applications. With its high capacitance-to-volume ratio, the B43540E2397M67 is an excellent option for power supplies, battery-powered electronic circuits, and appliances.

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