1812-391H

DC Resistance (DCR):	700 mOhm Max
Height - Seated (Max):	0.190" (4.83mm)
Size / Dimension:	0.126" L x 0.126" W (3.20mm x 3.20mm)
Supplier Device Package:	--
Package / Case:	2-SMD
Mounting Type:	Surface Mount
Inductance Frequency - Test:	25MHz
Operating Temperature:	-55°C ~ 125°C
Ratings:	--
Frequency - Self Resonant:	220MHz
Q @ Freq:	30 @ 25MHz
Series:	1812
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	535mA
Tolerance:	±3%
Inductance:	390nH
Material - Core:	Iron
Type:	--
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Fixed Inductors: 1812-391H Application Field and Working PrincipleFixed inductors, also known as inductors, are commonplace in many electronics. In fact, almost every electronic circuit, from home appliances to computer components, utilizes this basic element. Fixed inductors are indispensible for allowing an electrical current to flow according to a pre-determined magnitude and direction. One such available fixed inductor is the 1812-391H from Pulse Electronics. This type of inductor offers the user a means of providing a steady current over a wide spectrum of frequencies. To get a better understanding of the 1812-391H and its functions, let\'s examine its application field and working principle. Application FieldThe 1812-391H can be used as a differential common mode choke, with its primary application being noise immunity in high frequency systems. This inductor can be applied in a variety of high speed data transmission systems, including physical layers and network interface controllers. Also, as with most fixed inductors, the 1812-391H should not be operated in an environment that has salt or sulfur-based contaminants, as this could lead to corrosion. Working PrincipleThe 1812-391H operates on a process called "inductance." This is the scientific definition for the process of producing voltage when two alternating current-carrying conductors move in a magnetic field. When this occurs, a functional inductor together with a capacitor creates a closed narrow-band peak resonator, resulting in a tuned LC (inductor-capacitor) parallel connection. This LC circuit has a resonance frequency equal to the inverse of the product of the inductance and capacitance of the tuned circuit.To understand and explain the basic operation of the inductor better, let\'s take a look at a simple circuit of an AC signal being fed to an inductor. In this situation, an alternating-current (AC) source is applied to the primary winding of the inductor, and the magnetic flux from the flowing-current generates an induced voltage in the secondary winding. This induced voltage, in turn, flows through the other component connected to the secondary winding. The 1812-391H is an excellent example of a fixed inductor. Its application field and working principle provide us with the understanding of how this device can be used and why it behaves the way it does. It is widely applicable in many kinds of high-frequency systems, allowing for a steady current to flow through it and its circuitry. With its reliable properties and a relatively low cost, the 1812-391H is a popular choice for many electronics systems.

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