BN074E0684K--

Operating Temperature:	-55°C ~ 125°C
Features:	--
Ratings:	--
Applications:	High Pulse, DV/DT
Lead Spacing:	0.295" (7.50mm)
Termination:	PC Pins
Height - Seated (Max):	0.441" (11.20mm)
Size / Dimension:	0.398" L x 0.205" W (10.10mm x 5.20mm)
Package / Case:	Radial
Mounting Type:	Through Hole
Series:	BN
Dielectric Material:	Polyester, Metallized
Voltage Rating - DC:	100V
Voltage Rating - AC:	63V
Tolerance:	±10%
Capacitance:	0.68µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

Film capacitors, also known as plastic film capacitors, are a type of capacitor in which a thin plastic film is used as a dielectric. They are used for a variety of purposes, including decoupling, timing, filtering, bypassing, and DC blocking. The BN074E0684K is a type of film capacitor with two terminals and an integrated resistor. In this article, we will discuss the application fields and working principle of the BN074E0684K film capacitor.

Application Fields

The BN074E0684K film capacitor is mostly used in power electronics. It is a metalized polypropylene film capacitor with a wide temperature range from -55°C to +125°C and an insulation resistance over 25GΩ. The BN074E0684K film capacitor is particularly suitable for applications such as motor commutation and low to medium frequency applications, where HF noise needs to be avoided. In commutations, it is also often used to avoid voltage transients and voltage peaks causing false triggering of other circuits. Other common applications include pulse circuits, surge protection, and low-noise AC-DC converters.

Working Principle

Film capacitors are made up of two metal foils separated by a thin plastic film. The two foils are attached to the capacitor’s two terminals, which are usually either insulated metal or plastic. When the terminals are connected to a source of voltage, an electric field is created within the film. This electric field attracts and repels electrons within the film, creating a charge imbalance in the film. This charge imbalance is what allows the capacitor to store energy.The BN074E0684K film capacitor uses metalized polypropylene as its dielectric. This dielectric material offers a number of advantages, such as a high temperature range, low leakage current, high dielectric constant, and good insulation resistance. The metalized construction ensures that the capacitor’s capacitance does not decrease over time, due to thermal stresses. In addition, the integrated resistor in the BN074E0684K ensures that the capacitor is self-healing, meaning it can withstand high voltage transients without sustaining damage.

Conclusion

The BN074E0684K film capacitor is a highly versatile capacitor, suitable for a range of applications in power electronics. It is made with a metalized polypropylene film, which offers high temperature stability, low leakage current, and high dielectric constant. The integrated resistor ensures that the capacitor is self-healing, and that it can withstand high voltage transients without sustaining damage. In conclusion, the BN074E0684K is well-suited for use in applications such as motor commutation, low-frequency and high-frequency noise reduction, and surge protection.

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