2890-39F

DC Resistance (DCR):	1.85 Ohm Max
Height - Seated (Max):	--
Size / Dimension:	0.280" Dia x 0.900" L (7.11mm x 22.86mm)
Supplier Device Package:	--
Package / Case:	Axial
Mounting Type:	Through Hole
Inductance Frequency - Test:	2.5MHz
Operating Temperature:	-55°C ~ 105°C
Ratings:	--
Frequency - Self Resonant:	13MHz
Q @ Freq:	75 @ 2.5MHz
Series:	2890
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	325mA
Tolerance:	±1%
Inductance:	68µH
Material - Core:	Iron
Type:	Molded
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

Fixed inductors are one of the components of an electronic circuit, that is, they are used to store energy in the form of an electromagnetic field. Fixed inductors provide a low impedance path between input and output terminals. They are commonly used in power electronics applications for the purpose of filtering and noise suppression, as well as circuit protection.The 2890-39F is a standard type of fixed inductor that is designed for use in a variety of different applications. It is a radial leaded device with a wound inductance of 47mH. This specific inductor has a self-resonant frequency of 500kHz and a maximum operating temperature of 85°C.

Application Field

The 2890-39F has a wide range of possible applications. It can be used for many different purposes, including:

• Power supplies - The 2890-39F can be used to filter noise and suppress interference in large power supply systems.
• Switching converters - The inductor can be used as a low impedance path for switching converters, allowing for more efficient power conversion.
• Circuit protection - The inductor can be used as a protective device to limit current flow in high current circuits.
• Electromagnetic compatibility (EMC) - The inductor can be used in EMC applications, such as EMI suppression and filtering.
• Radio frequency (RF) circuits - The inductor can be used in RF circuits, such as in transmitters and receivers.
• Medical circuits - The inductor can be used in medical circuits, such as in EEG circuits and EMG circuits for patient monitoring.

Working Principle

The working principle of a fixed inductor is based on the principles of electromagnetic induction. The inductor consists of a coil of wire wound around a core material, such as iron, which can store a magnetic field. When an AC current is applied to the coil, an electromagnetic field is created, which then causes a current to flow in the coil. The inductor also has a self-resonant frequency, which is the frequency at which the inductance of the coil is equal to the impedance of the coil.The 2890-39F is a standard type of fixed inductor, and its function is similar to that of other fixed inductors. When a current is applied to the coil of the 2890-39F, it will produce an electromagnetic field, which can then be used to filter noise and suppress interference. The inductor also has a self-resonant frequency of 500kHz, which means it will have a maximum impedance at this frequency. This can be used to reduce current flow in high current circuits and improve the efficiency of power converters.

Conclusion

The 2890-39F is a standard type of fixed inductor, and it has a wide variety of possible applications. It can be used to filter noise and suppress interference in power supplies, as well as in switching converters, circuit protection, EMC applications, and RF circuits. The inductor also has a self-resonant frequency of 500kHz, which can be used to reduce current flow in high current circuits and improve power conversion efficiency. Understanding the working principle and application fields of the 2890-39F can help electronics engineers make the most of this device and improve their designs.

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