FFLI6Q0257K--

Operating Temperature:	-40°C ~ 95°C
Features:	--
Ratings:	--
Applications:	DC Link, DC Filtering
Lead Spacing:	1.260" (32.00mm)
Termination:	Screw Terminals
Height - Seated (Max):	6.181" (157.00mm)
Size / Dimension:	3.346" Dia (85.00mm)
Package / Case:	Radial, Can
Mounting Type:	Chassis, Stud Mount
Series:	FFLI
Dielectric Material:	Polypropylene (PP), Metallized
Voltage Rating - DC:	1400V (1.4kV)
Voltage Rating - AC:	--
Tolerance:	±10%
Capacitance:	250µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Film Capacitors: FFLI6Q0257K Application Field and Working Principle
A “film capacitor”, also referred to as an MKT capacitor, is an electrical component that stores and releases electrical energy. They are constructed with a metal plate and a dielectric film. Film capacitors are used in various applications such as AC power filtering, DC-DC converters, high voltage snubbers, audio crossover and many other specific usages.
Film capacitors are also referred to as FFLI6Q0257K. These capacitors feature very low loss dielectric materials and high insulation resistance. They provide excellent stability in a wide temperature range, and they are also operable in a broad frequency range. FFLI6Q0257K capacitors are generally considered suitable for voltage ranges of 05 to 4500V and capacitance ranges of 0.01 to 1000µF. The maximum working temperature accepted by these capacitors is typically 85°C. 
The working principle of FFLI6Q0257K capacitors is fairly simple. Two metal plates of opposite charge are separated by a dielectric film, which acts as an insulator, preventing a direct current from passing through. When a voltage is applied, charge is accumulated and stored in the plates and separated by the dielectric field, thus creating a capacitance. Once the voltage is removed, the charge stored in the capacitor gradually dissipates. This helps filter low frequency AC signals for AC power filtering duty. The dielectric used for FFLI6Q0257K capacitors is typically polyethylene terephthalate, also known as PET. 
FFLI6Q0257K capacitors find use in a variety of applications and are useful due to their low electrical losses and excellent stability. They are commonly used in applications where accuracy and stability are desired, such as audio crossover, AC power filtering, DC-DC converters, and high voltage snubbers. FFLI6Q0257K capacitors have also been used in a variety of medical, automotive, and communications applications owing to their tolerance to extreme temperatures and excellent performance in electrical applications.
In summary, FFLI6Q0257K capacitors are a type of film capacitors with an excellent performance. They can be used in a variety of applications, including AC power filtering, DC-DC converters, high voltage snubbers, audio crossover and many other specific uses. The working principle of these capacitors is based on the accumulation and storage of charge on two metal plates separated by a dielectric film. Their low electrical losses and high stability makes them highly suitable for applications where accuracy and stability are desired.

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