B41821A8226M

Aluminum Electrolytic Capacitors, or Aluminum Electrolytic Capacitors (AECs), are a type of polarized capacitor with a solid electrolyte and an aluminum oxide film on the plates. Their main distinctive feature is that they can store a large amount of energy, since the oxide layer acts as an insulator, preventing the inner surface of the plates from coming into contact with the electrolyte.

The B41821A8226M model of AEC is a miniaturized radial aluminium electrolytic capacitor, specifically designed to provide a large capacitance in a very small package. It has a voltage rating of 25V and a capacitance ranging from 4.7µF to 1500µF. It is equipped with a self-healing function which helps to prevent electrical short-circuits due to excessive voltages and ageing.

The application field of the B41821A8226M encompasses a wide range of diverse applications. It can be used in the design of power supplies, general electronics, connectors and other applications where a reliable and energy-efficient capacitor is needed. It is also suitable for low-frequency and high-frequency AC applications, such as audio amplifiers, radio receivers and oscillators. Additionally, the self-healing feature makes it very well-suited for automotive and medical applications, where its high reliability is critical.

The working principle of AECs is based on a process called “electrolytic oxidation”, where an anodizing reaction takes place on the surface of the aluminium plates. In this reaction, electrons are released into electrolyte, which combines with oxygen ions to produce an oxide film on the plate\'s surface. This oxide film acts as an insulator, preventing the inner surface of the plates from coming into contact with the electrolyte.

The key to AECs\' high energy density is that the oxide film acts as an insulating barrier, which allows the electric field of the device to be tightly managed. This makes it possible to achieve a capacitance value much larger than that of non-polarized capacitors with similar dimensions.

To sum it up, the B41821A8226M is a highly reliable and energy-efficient miniature radial aluminium electrolytic capacitor. It is an ideal choice for a wide range of applications, including power supplies, connectors and other general-purpose electronics, as well as audio amplifiers, radio receivers and oscillators. Its self-healing ability makes it especially suitable for automotive and medical purposes. The working principle of AECs is based on the electrolytic oxidation process, in which a layer of oxide is formed on the surface of the aluminium plates, acting as an insulating barrier and allowing it to store a large amount of energy.