0819R-74H

DC Resistance (DCR):	16 Ohm Max
Height - Seated (Max):	--
Size / Dimension:	0.078" Dia x 0.200" L (1.98mm x 5.08mm)
Supplier Device Package:	Axial
Package / Case:	Axial
Mounting Type:	Through Hole
Inductance Frequency - Test:	790kHz
Operating Temperature:	-55°C ~ 105°C
Ratings:	--
Frequency - Self Resonant:	8.9MHz
Q @ Freq:	35 @ 790kHz
Series:	0819R
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	54.5mA
Tolerance:	±3%
Inductance:	120µH
Material - Core:	Ferrite
Type:	Molded
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Fixed Inductors

Inductors are electronic components which consist of coils of wire around a core that acts to oppose changes in any electrical current, thereby producing a magnetic field which induces reactance. The 0819R-74H is a type of fixed inductor which is characterized by its reliable, potted construction. This type of inductor is commonly used in power supply designs, RF input and output applications, and low-voltage impedance matching elements.

Construction

The 0819R-74H is constructed from a ceramic body with a winding element which is impregnated with epoxy resin. This type of construction results in a much more robust and reliable inductor as compared to traditional air-core inductors. With the epoxy resin providing a barrier between the winding and body, the product is more resilient to shock and vibration, and also prevents the winding from becoming damaged when exposed to the environment.

Working Principle

The main working principle of the 0819R-74H is that of an inductor. In simple terms, an inductor is an electrical component which resists any changes in electrical current. When a voltage is applied across its terminals, an electrical current is produced which generates a magnetic field. This magnetic field then induces opposing reactance within the inductor, causing the current to be limited. If the voltage is increased, the magnetic field will be stronger and the reactance will also increase. Conversely, reducing the voltage will result in a weaker magnetic field and a corresponding reduction in reactance. This is the reason why inductors are used in power supply designs, as they can be used to limit the flow of current and protect devices from potential voltage spikes.

Application Field

The 0819R-74H can be used in a wide variety of applications, such as power supply designs, RF input and output applications, and low-voltage impedance matching elements. In power supply designs, the use of an 0819R-74H inductor in the input stage can prevent transients from affecting components downstream. This is because the inductor will oppose any changes in the voltage, limiting the current draw and preventing the power supply from being overloaded. In RF applications, the inductor is often used in conjunction with a capacitor to form a tuned circuit. This type of circuit will only allow frequencies within a specific range to pass through, thus providing a measure of filtering for radio frequency signals. Also, the 0819R-74H inductor can be used in audio applications, as well as any other low-voltage impedance matching element. By using the inductor to change the impedance of a particular load, it is possible to optimise matching between components for improved signal transfer.

Conclusion

The 0819R-74H is a robust and reliable fixed inductor which can be used in a variety of applications. Its core design provides excellent protection from shock and vibration compared to traditional air-core inductors, making it ideal for use in portable and other harsh environments. Its main working principle is that of an inductor, in which it blocks the flow of electrical current, and can also be used to limit the current in power supply designs or to provide tuning in RF applications. As such, the 0819R-74H is an incredibly useful component and can be used in many different situations.

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