ER1840-20JP

DC Resistance (DCR):	155 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:	65MHz
Q @ Freq:	30 @ 7.9MHz
Series:	ER1840
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	870mA
Tolerance:	±5%
Inductance:	3.9µH
Material - Core:	Iron
Type:	Molded
Part Status:	Active
Packaging:	Tape & Reel (TR)

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ER1840-20JP Fixed Inductor

Fixed inductors, commonly known as chokes, are electrical components that store electrical energy over a specific period of time when operating in an AC circuit. Unlike a standard inductor, the inductance of a fixed inductor does not vary when the current changes in the circuit. ER1840-20JP is a fixed inductor that offers high reliability and stable performance. It is most commonly used in AC line filters, RF filters, and power supplies.

ER1840-20JP Construction

ER1840-20JP is made of a ferrite core which is surrounded by two wires. The ferrite core helps to provide extended magnetically-induced electric fields, while the two wires, known as primary and secondary windings, aid in transferring electrical energy to and from the ferrite core. The ferrite core is designed to withstand both alternating and pulsating magnetic fields, as well as temperature and vibration.

ER1840-20JP Application

ER1840-20JP is designed to provide a low noise component for applications such as AC line filters, RF filters, and power supplies. AC line filters are used to reduce the interference caused by electronic products to telephone lines, data buses, and other radio emitting devices. RF filters are used to reduce the spread spectrum noise which can interfere with the operation of wide-band devices such as cellular phones. Power supplies are also essential in providing a continuous and regulated source of power and are used in virtually all electrical and electronic equipment.

ER1840-20JP Working Principle

The ER1840-20JP works by utilizing a ferrite core to convert energy from a growing electric field to a growing magnetic field. When the electric field is applied to the primary winding, the changing current creates a magnetic field within the core which induces a voltage in the secondary winding and results in the transfer of energy across the components. This process is repeated as the changing currents maintain their flowing magnetic field. The main advantage of using a fixed inductor is that the inductance remains constant regardless of the current running through it. This means that the inductor can provide predictable results regardless of changing current levels as long as the maximum current and voltage specifications are not exceeded.

Conclusion

ER1840-20JP is a fixed inductor designed to offer a high reliability and durable performance in AC line filters, RF filters, and power supplies. By utilizing a ferrite core to convert energy from an electric to a magnetic field, the ER1840-20JP can provide a predictable level of performance regardless of changing current climate. With its low noise levels and high reliability, the ER1840-20JP is the perfect choice for virtually any electrical or electronic applications requiring consistent performance.

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