B43305A2397M80

Aluminum Electrolytic Capacitors

The B43305A2397M80 is a type of aluminum electrolytic capacitor. These components feature a wide range of applications and are designed to meet ruggedness requirements. They are a type of polarized capacitor, meaning it has a positive and a negative lead, and they are made from an aluminum oxide film with a layer of electrolyte on top. The electrolyte creates a concentrated pool of charge on the surface, when it is coupled with the plate material, it creates an ultracapacitance.

Aluminum Electrolytic Capacitors (also known as alcos) are the highest capacitance-per-volume capacitors available today. They are used in a range of applications, including computer motherboards, consumer electronics, telecommunications, military and aerospace. Typical applications of these capacitors include signal filtering, power supplies, feedback, impedance matching, noise cancellation, and transient voltage suppression.

The B43305A2397M80 is a miniature (size code 3R5) aluminum electrolytic capacitor. It has a rated capacitance of 4.7µF, an operating voltage of 6.3V, and a surge voltage of 8V. The operating temperature range is from -55°C to +105°C, and the rated life is 2000 hours at +105°C.

Working Principle

The B43305A2397M80 works on the principle of Faraday’s law of electrolysis. This law states that the amount of electric current passed through an electrolytic solution will be proportional to the charge at the cathode (positive) and the anode (negative) electrodes. In the case of aluminum electrolytic capacitors, the current that passes is stored as electrostatic charge. When the current passes through the two plates, it creates an electrostatic field between them.

The electric field formed between the two plates creates a difference in electrostatic potential. This potential is called capacitance, and it is measured in Farads. The capacitor’s capacitance value is determined by the area of the plates, the distance between them, and the dielectric used to insulate them. In the case of the B43305A2397M80, the dielectric is an electrolyte.

Due to the negative charges in the electrolyte, an opposite electric field is formed around the edges of the plates. This opposing electric field is needed to counteract the electrostatic field and help maintain the charge balance between the two plates. This is important to prevent damage to the component.

Electrolytic capacitors are generally characterized by their high capacity, high voltage ratings, and high self-healing. They can be found in both leaded and surface-mount packages, and are suitable for a range of applications in consumer electronics, automotive, telecommunications, and audio systems. They are often used for power supplies, bypass circuits, filtering, coupling, and decoupling circuits. These capacitors are also utilized in dc/ac power inverters, switching power supplies, and instrumentation signals.