685PHB250K2H

ESR (Equivalent Series Resistance):	3.1 mOhms
Features:	--
Ratings:	--
Applications:	High Frequency, Switching
Lead Spacing:	1.083" (27.50mm)
Termination:	PC Pins
Height - Seated (Max):	1.299" (33.00mm)
Size / Dimension:	1.260" L x 0.709" W (32.00mm x 18.00mm)
Package / Case:	Radial
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 100°C
Series:	PHB
Dielectric Material:	Polypropylene (PP), Metallized
Voltage Rating - DC:	250V
Voltage Rating - AC:	160V
Tolerance:	±10%
Capacitance:	6.8µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Film Capacitors

A film capacitor, also known as a plastic film dielectric capacitor, is a capacitor that uses a plastic film as the dielectric and is an electrolytic capacitor with a dry construction. It is made by applying metal electrodes to both sides of the polyester film. The 685PHB250K2H film capacitor is an important member of this family.

Application field of 685PHB250K2H

The 685PHB250K2H is a type of film capacitor designed for medium voltage applications. It has a large capacitance ranging from 0.001µF to 0.47µF (1000pF to 470nF), making it suitable for a variety of electronic circuits. It has good high-frequency transient characteristics, making it especially suitable for voltage stabilization, smoothing, frequency tuning, and other high-frequency signal processing. It is also relatively small and lightweight, making it easy to install in circuit boards.

Working Principle of 685PHB250K2H

The 685PHB250K2H film capacitor works like any other capacitor in that it stores charge and releases when electrical current passes through it. It does so by using a thin polyester film dielectric that is sandwiched between two conductive electrodes. When an electric field is applied, the electrons in the electrode are attracted to the electrode with the opposite charge. This creates a charge imbalance between the two electrodes, which then stores electrical energy. This energy is used to pass current through the capacitor. The amount of energy stored is determined by the size of the capacitor and the strength of the electric field applied. Film capacitors consist of a thin sheet of plastic film surrounded by two electrodes, one of which is typically connected to the outside of the capacitor. The other electrode is insulated from the film by a thin ceramic layer, called the dielectric. This dielectric layer prevents the electric current from passing between the electrodes, allowing the capacitor to store energy. Depending on the type of film used, film capacitors have a wide range of operating temperature ranges and a wide frequency range. They can withstand voltages up to 3.3kV. Since these capacitors are made of dielectric materials, they are not affected by moisture and are highly stable over time.

Advantages of 685PHB250K2H

There are many advantages to using the 685PHB250K2H film capacitor. First, its design makes it much more reliable than electrolytic capacitors, which are prone to leakage and failure. The dielectric layer also prevents the electric current from passing between the electrodes, resulting in a much higher energy storage capabilities. Additionally, it is lightweight and small compared to other capacitors, making it ideal for use in circuit boards. Its wide range of operating temperature makes it suitable for a variety of environments and its wide frequency range also makes it suitable for a variety of applications.

Disadvantages of 685PHB250K2H

Despite its many advantages, the 685PHB250K2H film capacitor does have some drawbacks. One of the main disadvantages is its high cost. Film capacitors are more expensive than other types of capacitors due to their complexity. Additionally, since it relies on a thin plastic film as its dielectric material, it has a relatively low breakdown voltage. This means that it cannot be used in applications where very high voltage surges are expected.

Conclusion

The 685PHB250K2H is a type of film capacitor that is designed for medium voltage applications. It has a wide frequency range and a wide range of operating temperatures. Its small size and low weight make it ideal for circuit boards. Its many advantages include its high reliability and energy storage capacity. However, it also has some drawbacks, most notably its high cost and its relatively low breakdown voltage.

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