SFC44T20K391B-F

Operating Temperature:	-40°C ~ 70°C
Features:	--
Ratings:	--
Applications:	Motor Run
Lead Spacing:	0.810" (20.57mm)
Termination:	Quick Connect, Disconnect
Height - Seated (Max):	4.030" (102.36mm)
Size / Dimension:	2.910" L x 1.910" W (73.91mm x 48.51mm), Lip
Package / Case:	Radial, Can
Mounting Type:	Chassis Mount
Series:	SF
Dielectric Material:	Polypropylene (PP), Metallized
Voltage Rating - DC:	--
Voltage Rating - AC:	440V
Tolerance:	±10%
Capacitance:	20µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Film Capacitors: SFC44T20K391B-F Application Field and Working PrincipleFilm capacitors, also known as plastic film capacitors, are common components in electronic circuit boards and are widely used in signal processing circuits. The SFC44T20K391B-F is a polypropylene film capacitor designed for AC motor running, AV power equipment, PDP, and other equipment. This paper focuses on the application field and working principle of the SFC44T20K391B-F type film capacitor.

Application Field

The SFC44T20K391B-F type film capacitor is a polypropylene film capacitor with a rated voltage of 400V and a maximum operating temperature of +85°C. It is commonly used in motor start and running, AC motors, AV power equipment, PDP, and other equipment. Its functions include noise reduction, signal coupling, energy storage, signal delay, etc. It is considered to be stable, shock resistant, and low loss among its film capacitor peers. The electrical properties of the SFC44T20K391B-F type capacitor vary significantly depending on the type of application. The capacitor has a number of characteristics that ensure that it can be used in a wide range of applications. It has excellent high frequency characteristics, a low dielectric loss, and high insulation resistance. This property makes it perfect for signal coupling and signal delay applications. It has an ultra-low ESR rating, making it suitable for motor AC applications and AC ripple filtering. It also has a very low leakage current, making it perfect for AV power equipment and PDP protection.

Working Principle

The SFC44T20K391B-F is a polypropylene film capacitor. It is constructed mainly from a polypropylene film material coated on both sides with metal electrodes. The principle of its operation is based on the dielectric effect. When a voltage is applied, the capacitor will store an electric charge moving through an electric field between the two electrodes. The amount of charge stored is proportional to the applied voltage, and the resistance to the charge passing through the electric field is the dielectric. The two electrodes are separated by an insulating dielectric layer, which is made up of the polypropylene film. The polypropylene dielectric has a very low dielectric loss, thus making it highly efficient and low loss. The SFC44T20K391B-F is also known for its excellent high frequency characteristics. The polypropylene film allows this capacitor to have a very low ESL rating, leading to a great signal transmission at high frequencies. It can also handle high AC ripple currents, making it ideal for motor running applications.

Conclusion

In conclusion, the SFC44T20K391B-F type film capacitor is designed for a variety of applications, including motor start and running, AC motors, AV power equipment, PDP, and other equipment. It has excellent performance characteristics, such as low dielectric loss, high insulation resistance, low ESL rating, and low leakage current, and is considered to be stable, shock resistant, and low loss. The working principle of this capacitor is based on the dielectric effect, where the electric charge stored between the two electrodes is proportional to the applied voltage. This allows the SFC44T20K391B-F capacitor to handle high AC ripple currents and provide excellent high frequency characteristics.

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