B32796E3166K

Series:	B32796
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Not For New Designs
Moisture Sensitivity Level (MSL):	--
Capacitance:	16µF
Tolerance:	±10%
Voltage Rating - AC:	300V
Voltage Rating - DC:	700V
Dielectric Material:	Polypropylene (PP), Metallized
ESR (Equivalent Series Resistance):	3.9 mOhms
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Through Hole
Package / Case:	Radial
Size / Dimension:	1.654" L x 0.787" W (42.00mm x 20.00mm)
Height - Seated (Max):	1.555" (39.50mm)
Termination:	PC Pins
Lead Spacing:	1.476" (37.50mm)
Applications:	DC Link, DC Filtering; EMI, RFI Suppression
Ratings:	--
Features:	--

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Introduction to Film Capacitors

Film capacitors, also known as plastic or dielectric capacitors, are types of capacitors that use thin films of plastic as the dielectric. They are usually constructed by winding a sheet of plastic with a thin metal electrode and sealing it in an epoxy case. This form of construction gives them their unique features, such as high capacitance, low leakage current, excellent temperature and voltage stability and low ESR (equivalent series resistance).

Types and Construction of Film Capacitors

Film capacitors are primarily used in applications such as audio, radio frequency, broadcast, power conditioning, and power protection. They are available in a wide variety of sizes, shapes, and ratings, as well as a variety of dissipation factors, dielectrics, and operating voltages. The most popular types of film capacitors are metallized film capacitors and foil film capacitors. Metallized films are created by coating a dielectric layer with a thin layer of metal. This type of construction eliminates the need for the multiple layers needed for foils, resulting in a more robust and sleek design. Foil films are slightly thicker than metallized films and consist of a thin insulation with an inner and outer metal layer that is bonded together by a dielectric layer. The multiple layers of the foil make it stronger and more reliable than metallized films.

B32796E3166K Application Field and Working Principle

The B32796E316K is a high voltage, high ripple current series of film capacitors from Epcos. It is suitable for applications with high ripple currents and high voltages. These capacitors are used in snubber networks, power rail and feedback circuits, motor and locomotive traction, welding machines, microwave ovens, and communications devices. The B32796E3166K has a minimum operating temperature of -55°C, a maximum operating temperature of 105°C and a capacitance range of between 220pF to 1µF with a voltage rating of between 630V and 10000V. The capacitors are designed with small dimensions and tight capacitance tolerances to meet the requirements of demanding applications.In terms of working principle, the film capacitor works on the principle of electrostatic principle where two thin metallic electrodes are placed close together and separated by a dielectric material. The dielectric material creates a potential difference between the two electrodes which allows them to store an electrical charge. The charge is stored within the capacitor until the capacitor is discharged, at which point the voltage across the two electrodes will suddenly drop. As the two electrodes continue to have a charge across them, the capacitor continues to have a certain amount of capacitance. The greater the distance between the two electrodes and the dielectric with a higher permittivity, the higher the capacitance will be.

Conclusion

Film capacitors are essential components used in a variety of applications, including audio, radio frequency, broadcast, power conditioning, and power protection. It is important to understand the construction and types of film capacitors available to select the right capacitor for the application. The B32796E3166K film capacitor is a high voltage, high ripple current type of film capacitor. This capacitor meets the requirements for applications with high ripple currents and high voltages, such as snubber networks, power rail and feedback circuits, motor and locomotive traction, welding machines, microwave ovens, and communications devices. Understanding the working principle of film capacitors can also be very beneficial in selecting the right one for the application at hand since it allows for a better understanding of the components involved, the behavior of the capacitor under different conditions and its capabilities.

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