79F8R2K

DC Resistance (DCR):	2.2 Ohm Max
Height - Seated (Max):	--
Size / Dimension:	0.100" Dia x 0.160" L (2.54mm x 4.06mm)
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:	24MHz
Q @ Freq:	40 @ 7.9MHz
Series:	79F
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	165mA
Tolerance:	±10%
Inductance:	8.2µH
Material - Core:	Ferrite
Type:	Wirewound
Part Status:	Obsolete
Packaging:	Bulk

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Fixed InductorsFixed inductors, also known as chokes or coils, are electronic components that store energy in the form of magnetic fields. They serve a multitude of applications, ranging from filters to RF transformers, motors, and so on. 79F8R2K is an example of a fixed inductor with a wide range of applications and a working principle that is relatively easy to understand.At its simplest, a 79F8R2K consists of a wire wound around a ferrite core – a material with a high magnetic permeability. A current is then passed through the wire, creating a magnetic field within the device. This magnetic field is the energy storage component, but where the 79F8R2K differs, is in its ability to store a much higher magnetic field than other inductors.This high energy storage capacity makes the 79F8R2K a great device for use in filtering, as it can suppress higher frequencies and pass lower frequencies. This is known as high-frequency decoupling. The 79F8R2K is also great for RF transformers, providing a low source impedance and a high load impedance, and can also be used as an active or passive frequency divider.The 79F8R2K is also known for its ability to be used in frequency-dependent applications that require relatively low power levels. This is because the 79F8R2K is able to target the signal of a given frequency, allowing it to react more quickly than with other inductors. This is how it is used in motor applications, where the 79F8R2K can provide fast switching with controlled currents.Another application of the 79F8R2K is voltage regulation, where the device can act as both a voltage divider and a current limiter. This is due to its ability to reduce the voltage and current at higher frequencies, while still being able to act as a filter. This allows the current to pass only through certain components of the circuit, effectively regulating the voltage.The 79F8R2K’s ability to store large amounts of energy comes with the drawback of needing to be cooled. This is typically taken care of with a separate heat-dissipation system, as the 79F8R2K can overheat and become damaged if not properly cooled.In short, the 79F8R2K is an incredibly versatile fixed inductor, due to its ability to store a much higher magnetic field than other inductors. This makes it a great choice for filtering, RF transformers, frequency dividers, motor applications, and voltage regulation. However, in order to take full advantage of the 79F8R2K it is essential that it is kept cool in order to prevent it from being damaged.

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