DC Resistance (DCR):	305 mOhm 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:	7.9MHz
Operating Temperature:	-55°C ~ 125°C
Ratings:	--
Frequency - Self Resonant:	100MHz
Q @ Freq:	60 @ 7.9MHz
Series:	2890R
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	1.19A
Tolerance:	±3%
Inductance:	3.3µH
Material - Core:	Phenolic
Type:	Molded
Part Status:	Active
Packaging:	Tape & Reel (TR)

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Fixed Inductors

Introduction

Fixed inductors, also referred to or called choke coils, are components of the device used to store energy in the magnetic field. It consists of a coil of wire that can either be fixed or adjustable, with iron or another ferromagnetic material inside to increase the magnetic field. By altering the shape and construction of the coil, the inductance and other parameters can be adjusted to tailor the effect, which can be useful in a variety of applications. One example is the 2890R-08H fixed inductor, a component widely used in circuit design.

Application Field

The 2890R-08H is a surface-mounted inductor that has a variety of uses in circuit design. Its 10-millihenry inductance makes it suitable for high frequency applications, such as switching power supplies, dc-to-dc converters, and radio frequency amplifiers and transmitters. It can also be used as a broadband filter in communications systems. Its low current rating of 0.21A is a disadvantage for some applications, but it does extend the life of the component.

Working Principle

The working principle of the 2890R-08H is based on the same principle as any other inductor, which is the generation of a magnetic field within the coil when the current passes through it. This magnetic field stores energy and prevents the current from changing instantaneously. This effect also resists changes in voltage, and is useful for filtering out narrow-band signals and voltage spikes. The 2890R-08H has a ferrous core, which helps to strengthen the magnetic field by providing a low-resistive path for the current. The magnetic field is also affected by the geometry of the coil, which also affects the inductance. By using different materials and altering the design of the coil, such as using extra windings or adjusting the pitch of the windings, it is possible to increase or decrease the inductance to customize the desired effect.

Advantages

The main advantage of the 2890R-08H is its low cost and small size. Compared to larger inductors, it is much cheaper to produce and takes up less space, making it a popular choice for circuit designs. It also has a high frequency response, which makes it suitable for high frequency applications. The ferromagnetic core also helps to increase the magnetic field, as mentioned above, which increases its efficiency.

Conclusion

In conclusion, the 2890R-08H is a popular fixed inductor that is widely used in circuit designs. It is inexpensive and small, has a high frequency response, and can be adjusted to tailor the desired effect. It is suitable for high frequency applications, such as switching power supplies, dc-to-dc converters, and radio frequency amplifiers and transmitters. Its ferrous core also helps to increase the magnetic field, increasing its efficiency.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description