7447779003 Inductors, Coils, Chokes

DC Resistance (DCR):	30 mOhm Max
Height - Seated (Max):	0.177" (4.50mm)
Size / Dimension:	0.287" L x 0.287" W (7.30mm x 7.30mm)
Supplier Device Package:	--
Package / Case:	Nonstandard
Mounting Type:	Surface Mount
Inductance Frequency - Test:	1kHz
Operating Temperature:	-40°C ~ 125°C
Ratings:	--
Frequency - Self Resonant:	38MHz
Q @ Freq:	--
Series:	WE-PD
Shielding:	Shielded
Current - Saturation:	4.5A
Current Rating:	3.3A
Tolerance:	±20%
Inductance:	3.3µH
Material - Core:	Ferrite
Type:	Wirewound
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction to Fixed Inductors

Fixed inductors, often referred to as coils or chokes, are passive electronic components that store energy in the form of a magnetic field. They are used in a wide variety of applications, from RF and communications systems to power supplies and motor control circuits. Fixed inductors come in a variety of shapes and sizes, from tiny surface-mount packages to large bundles of copper wire. Though their construction is simple, they have a complex and important role in the circuitry they are used in.

Types of Fixed Inductors

Fixed inductors typically consist of wire windings around a magnetic core material, which can be either ferromagnetic substances like iron or soft magnetic materials like ferrite or powdered iron. The type of core material used can have a significant impact on the inductor\'s performance, as each one has distinct properties that determine the inductance, DC resistance, and other characteristics of the component. For example, ferrite cores offer greater high-frequency performance relative to their size, while powdered iron cores are often used when high saturation fields are necessary.

7447779003 Fixed Inductor Application Field and Working Principle

The model number 7447779003 is a fixed inductor designed for high-frequency switching power supplies. It has an effective inductance of 1.53µH, a DC resistance of 0.265Ω, and a saturation current of 4.7A. The winding consists of an enameled copper wire, which is wound around an iron powdercore material. This core material gives the inductor high saturation levels as well as a low DC resistance, making it ideal for high-frequency applications. When an electrical current passes through the inductor winding, a magnetic field is created, which induces a voltage in the winding. This voltage opposes any changes in the current flow, which makes the inductor an ideal component for filtering out high-frequency noise and providing radio frequency shielding. The 7447779003 has a tight tolerance of ±0.4%, which provides precise control over the amount of current being filtered and shielded.

Conclusion

Fixed inductors, such as the 7447779003, are a key component in a wide variety of applications. Thanks to their magnetic properties, they can be used for controlling current flows, filtering out high-frequency noise, and providing radio frequency shielding. Though their construction is simple, their performance and usage are complex and multifaceted.

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