25PK2200MEFC12.5X20

Aluminum Electrolytic Capacitors: 25PK2200MEFC12.5X20 Application Field and Working Principle

Aluminum electrolytic capacitors, often referred to as electrolytic capacitors, are one of the most common type of capacitors in electrical and electronic applications. They are characterized by their large capacitance per unit volume, relatively low cost, and good electrical performance. The 25PK2200MEFC12.5X20 aluminum electrolytic capacitors are typically used in applications ranging from power supplies and motors to amplifiers and audio equipment.

Characteristics of 25PK2200MEFC12.5X20 Aluminum Electrolytic Capacitors

The 25PK2200MEFC12.5X20 aluminum electrolytic capacitors are characterized by their relatively small size, high capacitance, and high reliability. They are able to handle large amounts of current and store a considerable amount of energy in a relatively small physical area. Other characteristics of 25PK2200MEFC12.5X20 aluminum electrolytic capacitors include:

• Rated voltage up to 450 Vdc.
• High ripple current capability.
• Low leakage current.
• High temperature stability.
• Low temperature coefficient.

Working Principle

25PK2200MEFC12.5X20 aluminum electrolytic capacitors are constructed from two pieces of foil (an anode and a cathode) with a separator film in between. The separator film is soaked in an electrolyte solution that is typically composed of a mixture of ethylene glycol and boric acid or a mixture of ethylene glycol and glacial acetic acid. The anode and cathode foils of the capacitor are formed into a rolled configuration, creating the necessary electrodes and separator layers to form the capacitor.

When the capacitor is connected to a DC voltage source, current flows through the electrolyte and deposits an oxide film on the anode foil. This film increases in thickness as current flows until a certain equilibrium value is reached. The thickness of the oxide film determines the capacitance of the capacitor, with a thicker film producing a higher capacitance. The voltage applied to the capacitor determines the capacitance. As the voltage is increased, the capacitance of the capacitor decreases and when the voltage is decreased the capacitance increases.

Applications

25PK2200MEFC12.5X20 aluminum electrolytic capacitors are versatile components, used in a variety of applications such as:

• Power supply regulation and filtering.
• Power supply decoupling.
• DC/DC converters.
• Pulse Wide Modulation (PWM).
• DC motor control.
• Audio and Video equipment.
• Amplifiers.

Conclusion

25PK2200MEFC12.5X20 aluminum electrolytic capacitors are widely used in applications that require high capacitance, high reliability and low cost. They are made up of two pieces of foil that are rolled into a cylinder, with an electrolyte solution soaked separator film between them. This combination creates an efficient energy storage element that is capable of providing a high capacitance in a relatively small size. 25PK2200MEFC12.5X20 aluminum electrolytic capacitors are versatile components and can be used in a variety of applications, ranging from power supplies and motors to amplifiers and audio equipment.