ER1840-28KR

DC Resistance (DCR):	440 mOhm Max
Height - Seated (Max):	--
Size / Dimension:	0.187" Dia x 0.437" L (4.75mm x 11.10mm)
Supplier Device Package:	--
Package / Case:	Axial
Mounting Type:	Through Hole
Inductance Frequency - Test:	7.9MHz
Operating Temperature:	-55°C ~ 105°C
Ratings:	--
Frequency - Self Resonant:	48MHz
Q @ Freq:	30 @ 7.9MHz
Series:	ER1840
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	520mA
Tolerance:	±10%
Inductance:	8.2µH
Material - Core:	Iron
Type:	Molded
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Fixed InductorsInductors, also known as coils, chokes, or reactors, are passive electrical components used in a variety of electrical circuits. One type of inductor is the fixed inductor, and one example of a fixed inductor is the ER1840-28KR.The ER1840-28KR is typically used in high-frequency switching circuits, USB port protection circuits, and amplifier circuits. It is designed for high current and very small size applications and is compatible with reflow soldering. It has a high stability rating and is rated for a maximum operating temperature of 105 degrees Celsius.In order to understand how the ER1840-28KR works, one must first understand basic principles of inductors. An inductor is an electrical component that stores energy in the form of a magnetic field when a current is applied to it. When the current is removed, the magnetic field collapses, releasing the stored energy. Inductors are typically used to filter out noise in electrical circuits, and they can also be used to filter signals, to prevent their distortion by other components.The ER1840-28KR is a full-fledged fixed inductor. It is made up of a central core, which houses the mechanical components of the inductor, and a winding, which consists of one or more coils of wire, each of which is known as a turn, surrounding the core. The winding is connected to two terminals known as terminals 1 and 2. As current is passed through the winding, a magnetic field is created, and this field will react with the current to generate an electrical voltage across terminals 1 and 2. This voltage is known as the back EMF or induced voltage. The strength of this voltage is determined by the number of turns and the amount of current passing through the winding.The ER1840-28KR is designed to be able to handle a relatively large amount of current and can operate at frequencies up to 1MHz. Due to its small size and its ability to handle high currents, the ER1840-28KR is ideal for use in high-frequency switching circuits, USB port protection circuits, and amplifier circuits. Furthermore, the ER1840-28KR’s stability rating ensures that it will continue functioning properly in a wide range of temperatures and conditions.In conclusion, the ER1840-28KR is a full-fledged fixed inductor designed for high current and very small size applications. It is typically used in high-frequency switching circuits, USB port protection circuits, and amplifier circuits. The ER1840-28KR is designed to be able to handle a relatively large amount of current and can operate at frequencies up to 1MHz. Its small size, high current rating, and stability make it ideal for these types of applications.

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