78F1R8K

DC Resistance (DCR):	250 mOhm Max
Height - Seated (Max):	--
Size / Dimension:	0.110" Dia x 0.280" L (2.79mm x 7.11mm)
Supplier Device Package:	Axial
Package / Case:	Axial
Mounting Type:	Through Hole
Inductance Frequency - Test:	7.9MHz
Operating Temperature:	-55°C ~ 105°C
Ratings:	--
Frequency - Self Resonant:	125MHz
Q @ Freq:	50 @ 7.9MHz
Series:	78F
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	455mA
Tolerance:	±10%
Inductance:	1.8µH
Material - Core:	Ferrite
Type:	Wirewound
Part Status:	Obsolete
Packaging:	Bulk

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Fixed inductors are passive devices used to store electrical energy in an alternating current (AC) circuit. They are also known as chokes or coils, and are typically used to filter out high-frequency noise from a power supply or provide electrical isolation between two circuits.In this article, we will discuss the application field and working principle of a specific type of fixed inductor – the 78F1R8K.The 78F1R8K inductor is primarily used in high-frequency filtering applications. It is an inductor which is constructed of a ferrite core and a high-temperature-resistant casing. It has a wide inductance range and is capable of filtering out high-frequency noise with a minimum of power loss. Its design also makes it suitable for applications where vibration and extreme temperatures could lead to a failure of normal inductors.The core of the 78F1R8K is made up of a ferromagnetic material. This type of material exhibits a high degree of permeability and therefore increases the inductance of the inductor. As an additional benefit, the high degree of permeability also reduces the power loss to a minimum.The working principle of the 78F1R8K is based on the generation of a magnetic field by passing a current through its windings. This magnetic field stores energy which is dissipated as the current passes through the inductor. The magnetic field then changes direction as the current changes, allowing for efficient filtering of high-frequency noise.In applications such as power supplies, the 78F1R8K is ideal for filtering out high-frequency noise. As the current passes through the inductor, the magnetic field generated interacts with the noise to reduce its amplitude. This decreases the amount of noise in the power supply, allowing it to deliver clean power to other components.The 78F1R8K can also be used in radio-frequency (RF) applications to provide additional filtering for high-frequency signals. This inductor’s wide inductance range allows it to effectively filter out RF signals while still maintaining a high degree of accuracy.Finally, the 78F1R8K is often used in motor drive applications, particularly in stepper motors. Its high-temperature-resistant casing and ferromagnetic core make it ideal for handling the high-frequency signals generated by stepper motors.In summary, the 78F1R8K is an effective and reliable fixed inductor with a wide range of applications. It is particularly suited to high-frequency filtering applications, radio-frequency applications, and motor drive applications. Its construction makes it highly resistant to vibration and extreme temperatures, giving it a longevity that is hard to match.

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