B32796G2256K

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Film capacitors are electric components commonly used in electronic designs. Their role is to store electrical charge in order to perform functions such as filtering, buffering, and decoupling. One specific type of film capacitor is called a B32796G2256K, and its application field and working principle is of great importance for electrical engineers to understand.

What is a B32796G2256K?

The B32796G2256K is a specific type of polyester film capacitor made by the manufacturer EPCOS, a division of TDK. It is a three-lead component, with two leads on the top and one lead on the bottom. It is designed for use in applications which require temporary overvoltage protection, such as electronic circuits.

Application Field

The B32796G2256K has a wide range of applications, the most common being protection and decoupling circuits. It is used in high-voltage DC supplies, as well as in AC systems due to its ability to withstand high voltage transients. Additionally, it can be used in switching power supplies to absorb overvoltage spikes and prevent damage to sensitive components.

The B32796G2256K is also commonly used in audio applications, such as bass and mid-range speakers. This is due to its low profile and high capacitor values, which make it suitable for high-power, low-impedance audio systems. In addition, it can be used in TV sets for protection against overvoltage, and has become popular in the automotive industry for use in anti-lock braking systems, airbag systems, and other safety-related applications.

Working Principle

The B32796G2256K works by storing electrical charge when it is exposed to an alternating current (AC). The capacitor consists of two faces, usually coated in metal, which are separated by a dielectric material such as polyethylene terephthalate (PET). When a voltage is applied across the capacitor, the electric field between the two faces stores energy in the form of an electric displacement current, otherwise known as a dielectric current. This current is directly proportional to the capacitance of the capacitor, which can vary depending on the size and construction of the capacitor.

The B32796G2256K also has the ability to reduce currents when exposed to transients. When a fast-acting switch is used to control an AC circuit, a current spike occurs during the transition from the off to the on position. As the voltage exceeds the breakdown voltage of the capacitor, it releases some of its stored charge, thereby reducing the current in the circuit and preventing damage to the sensitive components.

Conclusion

The B32796G2256K is a three-lead polyester film capacitor designed for use in high-voltage DC and AC applications which require temporary overvoltage protection. It is capable of storing electrical charge and reducing currents when exposed to transients. It is commonly used in protection and decoupling circuits, as well as in audio systems, TV sets, and automotive applications. As a result, it is an essential component in many electronic designs and its application field and working principle are invaluable to electrical engineers.

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