940C12W1K-F

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Film Capacitors

Film capacitors, also known as plastic film capacitors, are composed of an insulating film sandwiched between two electrodes. The film is typically constructed of polyester, polypropylene, polycarbonate, or even cellulose. Film capacitors offer very low losses and high volumetric efficiency in comparison with other capacitor types such as ceramic capacitors, mica capacitors, and electrolytic capacitors. As a result, they are often used in power supplies and other high-frequency applications.

The 940C12W1K-F film capacitor is a versatile, low-cost capacitor that has a wide range of uses. The capacitor is an economical choice for high current applications and its dielectric strength is excellent. Additionally, this capacitor can be used in high temperature environments and can handle a surge current. The 940C12W1K-F offers excellent stability and low impedance.

Application Field

The 940C12W1K-F film capacitor is most commonly used in power supplies, audio and video circuits, automotive electronics, and industrial control systems. Its high tolerance and stability make it a good choice for power supplies and rectifiers, as well as for filters, snubbers, and surge protection circuits. It is well-suited for high temperature applications, as well as for use in radiation environments.

Working Principle

A film capacitor works by storing an electric charge between two metal plates. A thin dielectric material is placed between the two plates and acts as an insulator. When a voltage is applied across the plates, the capacitor accumulates charge, while at the same time the current is blocked due to the insulating properties of the dielectric. This accumulation of charge creates an electric field that opposes the applied voltage, effectively limiting the amount of current that passes through the capacitor.

The 940C12W1K-F film capacitor uses a thin polyester film as the dielectric material. This provides excellent insulation, enabling it to handle high voltage applications. The two electrodes are made of aluminum or tin-plated steel, and the capacitor is typically housed in a plastic case. This design provides additional protection from vibration, dust, and moisture.

Conclusion

The 940C12W1K-F film capacitor is an economical and reliable choice for many industrial, automotive, and consumer applications. Its low cost and high performance make it an attractive option for many high current and high voltage applications. Its polyester film dielectric ensures excellent insulation and stability, making it especially suitable for use in high temperature applications, radiation environments, and surge protection circuits.

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