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Film Capacitors

Film capacitors, also known as plastic film capacitors, polypropylene capacitors, polyester capacitors, mylar capacitors, etc. are electrical components used in a wide range of electrical and electronic applications. Film capacitors are composed of two or more capacitor elements, each of which is made of a different type of film. The characteristics of film capacitors depend on the type of film used. The most commonly used film types are polyester, polypropylene, and polystyrene. Film capacitors are widely used in both high-voltage and low-voltage applications. In this article, we will discuss the application fields and working principle of the B81130B1684M film capacitor.

Application Fields

The B81130B1684M film capacitor is designed for use in high-voltage applications up to 5kV. It is typically used in high-voltage ac power supply circuits, such as rectifiers, filters, snubbers, and ballasts. In addition, it can be used in power switching circuits, motor control, and PFC circuits. The B81130B1684M also has a wide operating temperature range that allows it to be used in extreme temperatures, ranging from -40°C to +105°C. The B81130B1684M also features very low leakage current, making it suitable for high-accuracy applications.

Working Principle

The B81130B1684M film capacitor is a surface-mount device, meaning it is mounted directly onto the circuit board. It uses two films, polyester and polypropylene, with each film layer wrapped around the other. The polyester film is the dielectric, which causes the charge to accumulate and store on its surface. The polypropylene film is the conductive layer which provides an electrical path for the charge to travel. When voltage is applied to the capacitor, a gate charge is formed, which causes a current to flow through the capacitor and builds up a charge difference between the two electrodes. This charge difference then creates the electric field which produces the capacitance value.

The B81130B1684M is designed to handle high-voltage and high-current applications with high reliability and low failure rate. Its polyester film construction provides excellent protection against moisture, dust, and other environmental factors. Additionally, its low inductance and low ESR make it ideal for high-speed applications. Overall, the B81130B1684M is an excellent choice for applications in high-voltage and high-current applications.

Conclusion

The B81130B1684M is a high-voltage film capacitor that can be used in a wide variety of electrical and electronic applications. Its polyester and polypropylene construction ensures reliable operation in extreme temperatures, and its low inductance and ESR make it suitable for high-speed applications. The B81130B1684M is an excellent choice for high-voltage and high-current circuits.

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