BF014D0473K

Operating Temperature:	-55°C ~ 100°C
Features:	--
Ratings:	--
Applications:	General Purpose
Lead Spacing:	0.200" (5.08mm)
Termination:	PC Pins
Height - Seated (Max):	0.256" (6.50mm)
Size / Dimension:	0.295" L x 0.098" W (7.50mm x 2.50mm)
Package / Case:	Radial
Mounting Type:	Through Hole
Series:	BF
Dielectric Material:	Polyester, Metallized
Voltage Rating - DC:	63V
Voltage Rating - AC:	40V
Tolerance:	±10%
Capacitance:	0.047µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

Film Capacitors are a type of capacitors commonly used in electronics, typically spanning 0.05 – 250 µF capacitance range, deriving their name from the dielectric material used, which is typically a plastic film such as polypropylene, polyester, Mylar, cellulose nitrate, polystyrene, and PET. BF014D0473K is a single piece, snap-in mounted film capacitor that is used in automotive, automotive audio system, power electronics, and EMI/RFI suppression applciations. This paper will discuss the application field and working principle of BF014D0473K.

Application Field

BF014D0473K is designed for automotive, automotive audio system and power electronics applications. Automotive applications include automotive sound systems, embedded control systems and other electronic equipment. Automotive audio systems include car amplifiers, capacitors, and stereo amplifiers. In automotive audio systems, BF014D0473K can provide voltage stabilization and suppress interference generated by electromagnetic radiation. It can also reduce the noise caused by electrical interference and improve the audio quality of the sound system. In power electronics applications, the BF014D0473K can provide filtering of power supply ripple, reduce system noise, and reduce voltage spikes. Furthermore, its long life and high reliability make it an ideal choice for embedded control systems in vehicles, and for other automotive electronics.

Working Principle

The working principle of the BF014D0473K is based on its dielectric material properties. Its dielectric medium is a plastics film, typically polypropylene, polyester, Mylar, cellulose nitrate, polystyrene, or PET, which is formed into two layers of electrodes that sandwich the dielectric medium. This plastic film is highly effective in preventing current leakage and temporal voltage oscillations, reducing power losses and preventing electromagnetic interference (EMI) from exiting the device. The electrical capacitance of the device is determined by the relative area of the electrodes, the distance between the electrodes, and the type, area, and thickness of the dielectric medium.When an AC voltage is connected to the two electrodes of the BF014D0473K, the dielectric medium will dissipate some of the voltage, creating a dielectric-mediated buffer that limits the rise and fall of the voltage. This limits the amount of current that can flow through the capacitor, thus functioning as an electrical filter. Similarly, when DC voltage is applied, the dielectric material will absorb a portion of the voltage, thus acting as a voltage regulator within the capacitance range.

Conclusion

BF014D0473K is a single piece, snap-in mounted film capacitor, designed for automotive, automotive audio systems, and power electronics applications. Its dielectric material prevents current leakage, reduces power losses, and prevents EMI from exiting the device. When AC or DC voltage is applied, the dielectric material reduces the rise and fall of the voltage, thus reducing the current that can be drawn and acting as a filter or regulator.

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