DC Resistance (DCR):	10 Ohm 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:	790kHz
Operating Temperature:	-55°C ~ 125°C
Ratings:	--
Frequency - Self Resonant:	4MHz
Q @ Freq:	40 @ 790kHz
Series:	1812R
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	142mA
Tolerance:	±1%
Inductance:	220µH
Material - Core:	Ferrite
Type:	--
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Fixed Inductors 1812R-224F Application Field and Working Principle

Fixed inductors are used in a variety of circuits to store energy, reduce the voltage in an output circuit, or to maintain the operating frequency of an oscillating circuit. The 1812R-224F is one type of fixed inductor. Understanding its field of application and working principle is essential to using the component properly.

Application Fields of 1812R-224F Fixed Inductors

The 1812R-224F fixed inductor is often used in power supply and 0~40kHz signal pickup circuits. It is suitable for Lead-Free soldering, and its special structural design allows for lower DCR and inductance tolerance. The component also offers a low profile and easy installation.The common use of this fixed inductor includes PLC signal pickup, power conversion, DC-DC converters, TV set and audio systems. Other applications include flyback converters, laser drivers, automotive power supplies, switching regulators, mobile phones, Bluetooth wireless transmitters, and USB signal pickup transceivers.

Working Principle of 1812R-224F Fixed Inductors

The 1812R-224F fixed inductor consists of a tightly wound coil comprised of insulated copper windings and an air-core. When current flows through the induction coil, a magnetic field is generated, which is proportional to the current. This magnetic field generates an opposite electromotive force (EMF) which edits the flow of current.The principle of operation of the fixed inductor is based on the phenomenon that when current through an inductor is changed, an induced electromotive force (EMF) occurs across its terminals. The EMF is proportional to the rate of change of the current, and this EMF works against the change of the current. This effect is known as self-induction.For example, when a DC voltage is applied to an inductor, the current through the inductor increases gradually with time. As this current increases, a magnetic field is generated in the core supporting the wire. This magnetic field in turn generates an opposite EMF which opposes the flow of current, restricting the rise of the current. This is the self-induction of the fixed inductor, and it is the source of its ability to store energy.

Conclusion

Understanding the application field and working principle of the 1812R-224F fixed inductor is necessary to use the component properly in any circuit. It proves to be widely applicable in power supply and 0~40kHz signal pickup circuits. Furthermore, the principle of operation of the inductor relies on self-induction, which is the phenomenon of an induced EMF opposing the rise of current.

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