DC Resistance (DCR):	200 mOhm Max
Height - Seated (Max):	0.230" (5.84mm)
Size / Dimension:	0.210" L x 0.110" W (5.33mm x 2.79mm)
Supplier Device Package:	--
Package / Case:	Radial
Mounting Type:	Through Hole
Inductance Frequency - Test:	50MHz
Operating Temperature:	-55°C ~ 125°C
Ratings:	--
Frequency - Self Resonant:	220MHz
Q @ Freq:	80 @ 50MHz
Series:	4445
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	1A
Tolerance:	±5%
Inductance:	470nH
Material - Core:	Iron
Type:	Toroidal
Part Status:	Active
Packaging:	Bulk

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4445-21J Application Field and Working Principle

Introduction to Fixed Inductors

Fixed inductors are devices used to create a magnetic field which contains a fixed amount of stored energy. These devices are commonly used in various types of electrical circuits, such as power supplies and RF circuits, to provide a steady current. They are also typically chosen for their low power consumption, high frequency capability, and good resistance to induced noise. Fixed inductors can be sub-divided into two categories: active and passive. Active inductors are generally used for high-frequency applications, while passive inductors are typically found in low-frequency designs.

4445-21J Application Field and Working Principle

The 4445-21J is an active fixed inductor that is designed for use in high-frequency applications. This SMT (surface mounted technology) inductor has a maximum value of 1.2 uH. It can operate within a temperature range of -40°C to +85°C, and can handle up to 1 W of power dissipation.The 4445-21J is constructed of a ceramic-filled epoxy case and a bobbin core, both of which are designed to meet industry-standard specifications for low- and high-frequency applications. This inductor is also equipped with a unique EMI suppression feature, which not only helps to lower the component\'s noise levels, but also acts as a filter that helps the inductor operate smoothly in high-frequency applications. To understand the working principle of the 4445-21J, it is important to know how an inductor works. In an inductor, an electric current creates a magnetic field that generates an opposing voltage. This property is known as inductance, and it is measured in henries (H). Inductors are widely used in applications that require power to be stored in a steady manner. This is because the magnetic field in the inductor can act as a buffer, allowing it to absorb and store energy. When the current decreases, the inductor is able to slowly release the stored energy back into the circuit, thus providing a steady current.The 4445-21J is designed to meet the same principles as other active inductors. It has an inductance value of 1.2 uH, which means it has an effective buffer for energy storage, and it also has a high frequency response to provide a steady current output. Additionally, due to its robust construction and EMI suppression feature, the 4445-21J is ideal for high-frequency applications where minimizing noise is of utmost importance.

Conclusion

In conclusion, the 4445-21J is an efficient and reliable fixed inductor. It is designed for use in high-frequency applications such as power supplies and RF circuits, and is also equipped with an EMI suppression feature to minimize noise levels. The inductor\'s magnetic field and ceramic-filled epoxy case make it capable of storing energy and providing a steady current. Thus, it is the perfect choice for a variety of applications.

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