BFC237138683

Operating Temperature:	-55°C ~ 105°C
Features:	Long Life
Ratings:	--
Applications:	General Purpose
Lead Spacing:	0.300" (7.62mm)
Termination:	PC Pins
Height - Seated (Max):	0.728" (18.50mm)
Size / Dimension:	0.394" L x 0.098" W (10.00mm x 2.50mm)
Package / Case:	Radial
Mounting Type:	Through Hole
Series:	MKT371
Dielectric Material:	Polyester, Metallized
Voltage Rating - DC:	63V
Voltage Rating - AC:	40V
Tolerance:	±10%
Capacitance:	0.068µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Box (TB)

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Film Capacitors

Film capacitors are electronic components that store charge between two conductors, separated by an insulating material. The film capacitor designation "BFC237138683" refers to the physical structure of the capacitor, which consists of a thin dielectric film sandwiched between two electrodes. The electrodes are typically made of metal foil and can employ multiple layers of the dielectric film for increased capacitance. These types of capacitors possess several advantages over their equally popular aluminum electrolytic, ceramic, and tantalum counterparts.

Advantages

Film capacitors offer superior high frequency performance, temperature stability, and better tolerance of peak voltage. The dielectric material used for film capacitors is extremely thin, which reduces the stored charge and makes the capacitors less susceptible to failure. Since the film is a pure dielectric, the capacitors also provide superior insulation resistance and prevent current leakage between two conductors. Due to the high-frequency characteristics and low dielectric absorption of these components, they are ideal for use in high-end audio and video applications such as amplifiers, graphic equalizers, and high-end home audio systems. They are also reliable for power system applications such as power factor correction (PFC) and active filters, and are extensively used in inverters, DC-DC converters, motors, and power supplies.

Working Principle

The working principle of a film capacitor is quite simple: when a positive charge is applied to one electrode, an equal but opposite negative charge is created on the other side. This equal but opposite charge creates an electric field between the two electrodes, thus separating them. When a potential difference is applied across the electrodes, an electric field develops and causes current to flow across the dielectric material, resulting in a voltage drop across the capacitor. Since the dielectric material used in film capacitors is extremely thin, electric current can flow across it more easily, allowing for a higher capacitance. In addition, the double-layer construction creates an additional barrier that prevents cross ions from entering the capacitor, increasing the breakdown voltage and providing additional stability.

Conclusion

Film capacitors are widely employed in many electronics applications due to their superior characteristics such as high-frequency performance, low parasitic effects, and superior insulation resistance. As such, the BFC237138683 designation is used to identify a film capacitor with specific dimensions and electrical parameters. They are reliable for use in a range of power system as well as audio and video applications.

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