DC Resistance (DCR):	13 Ohm Max
Height - Seated (Max):	--
Size / Dimension:	0.310" Dia x 0.910" L (7.87mm x 23.11mm)
Supplier Device Package:	--
Package / Case:	Axial
Mounting Type:	Through Hole
Inductance Frequency - Test:	790kHz
Operating Temperature:	-55°C ~ 125°C
Ratings:	--
Frequency - Self Resonant:	7.2MHz
Q @ Freq:	70 @ 1MHz
Series:	4470
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	195mA
Tolerance:	±5%
Inductance:	270µH
Material - Core:	Iron
Type:	Molded
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Fixed Inductors

Fixed inductors are electronic components that are designed to have a constant inductance over a wide range of frequencies and temperatures. Commonly used for creating a tuned circuit or for blocking certain frequencies, fixed inductors are found in many electronic applications, from radios to computers. The 4470-30J, an fixed inductor from Coilcraft, is a high-performance inductor with the ability to handle 3 Amps.

4470-30J Application Field

The 4470-30J is commonly used in applications where high-current switching is involved, or where frequent current transitions occur. These applications typically involve the switching of high-current DC loads, enabling the design of small and lightweight power supplies. Examples of such application fields include amplified audio devices, microprocessor-based controls, and backlighting systems.The 4470-30J is also used in HF and VHF antenna systems, where it acts to filter frequency components that are not wanted or which could interfere with a system operation. Additionally, the inductor\'s shielded construction helps reduce electromagnetic interference, making it ideal for medical and industrial applications.

4470-30J Working Principle

The core of a fixed inductor is an enclosed coil of wire. This coil can be composed of either an air core, ferromagnetic core, or an amorphous core. The 4470-30J uses an amorphous core, which is a core composed of a specialized alloy of metals that minimizes losses due to hysteresis, eddy currents, and other phenomena. The wire winding of the coil is as important: it must be wound in a specific pattern to provide a specific inductance. A fixed inductor works by generating a magnetic field when current passes through its wire coil. This magnetic field has a wavelength that is determined by the number of windings on the coil and the core material, making it ideal for tuning radio frequencies and signal conditioning. The 4470-30J is designed to have a higher current handling capability than most fixed inductors. This is achieved through its amorphous core and tightly wound windings, which has a greater number of windings than a standard ferromagnetic core. As a result, the 4470-30J can handle up to 3 Amps, depending on the application, and feature a maximum saturation current of 20 Amps.

Conclusion

The 4470-30J is a high-performance fixed inductor from Coilcraft with the ability to handle up to 3 Amps of current. Its shielded construction and tightly wound coil makes it suitable for a wide variety of application fields, from backlighting and medical systems to HF antenna systems. The 4470-30J can be used for signal conditioning and tuning radio frequencies, and its amorphous core helps reduce losses from hysteresis, eddy currents, and other phenomena. With its high current rating, the 4470-30J is an excellent choice for designers who need a high-performance inductor in their designs.

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