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Film Capacitors

Film capacitors are a type of capacitor whose construction is made using metallized plastic films. Typically, these capacitors feature a layer of metal particles evaporated onto a plastic film dielectric to form a capacitor. Film capacitors offer high dielectric strength and stability, broad operational temperature range, good self-healing properties, low coefficient of thermal expansion, excellent electrical and mechanical properties.

The SFT37S80K391B-F is a SMD chip film capacitor that has many beneficial properties and uses. This product utilizes two anisotropic crystalline materials of different resistivities combined with two other conductive film layers to form a double layer plate, providing a low equivalent series resistance (ESR). With a capacitance range of 37pF, the SFT37S80K391B-F is a high performance, RoHS compliant, RoHS/REACH compliant, and UL approved component.

Applications

The SFT37S805391B-F is suitable for use in high frequency SMD chip applications including filtering and timing circuits, as well as other high-performance applications. It also supports low ESR values and is typically used in high-frequency communication and automotive applications.

Working Principle

The SFT37S805391B-F is an SMD chip film capacitor that operates on the principle of a dielectric material having a high permittivity or in other words, a high electric field strength. The plastic film dielectric is the main component of the capacitor and forms the electrolyte when coupled with the two conducting layers of metal particles. When a voltage is applied, opposing and oppositely charged particles of the metal layer are attracted to each other, forming an electric field between them resulting in a capacitance. As this voltage is increased, the capacitance increases as well.

Conclusion

The SFT37S805391B-F SMD chip film capacitor is an ideal choice for a variety of high-performance applications due to its low ESR, good self-healing properties and broad operational temperature range. The capacitor operates on the principle of triple layer construction to form an electric field between two oppositely charged particles of the metal layer. This enables the capacitor to produce high capacitance when a voltage is applied, making the SFT37S805391B-F an excellent choice for high-frequency communication and automotive applications.

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