78F391J

DC Resistance (DCR):	10.5 Ohm Max
Height - Seated (Max):	--
Size / Dimension:	0.110" Dia x 0.280" L (2.79mm x 7.11mm)
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:	2.8MHz
Q @ Freq:	60 @ 790kHz
Series:	78F
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	60mA
Tolerance:	±5%
Inductance:	390µH
Material - Core:	Ferrite
Type:	Wirewound
Part Status:	Obsolete
Packaging:	Bulk

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Fixed Inductors - 78F391J Application Field and Working Principle

Fixed inductors employing 78F391J are prevalent electronic components with a wide range of applications in circuit design. This article will provide an introduction to the application field and working principle of this inductor.

What are Fixed Inductors?

Fixed inductors are passive electrical components that store and release energy in the form of a magnetic field. They can be either wound on a core, or simply be composed of loops of wire. They are also known as choke coils, as their presence in a circuit can restrict current flow. The main components of a practical inductor are the magnetic core, which determines how much energy the inductor stores; and one or more electrical windings of wire that couple the energy into the inductor.

Application Fields of 78F391J

The 78F391J fixed inductor is widely used in electronic circuits for a variety of applications. For example, it can be used as an EMI filter to reduce noise in a circuit. It can also be used in power supplies to control the current in a circuit, minimizing voltage drop and increasing efficiency. Other application fields include filters, oscillators and voltage multipliers.

Working Principle of 78F391J

The 78F391J fixed inductor works by creating a magnetic field around two iron cores, which are positioned either side of the inductor’s winding. When a current passes through the inductor, it effectively creates a circular magnetic field around the two cores and increases with the amount of current running through it. This magnetic field generates a counter-emf in the inductor. This changes the voltage level across the inductor, resulting in a change in the current passing through it. This change in current results in the inductor storing energy in the form of a magnetic field.When the current passes through the inductor is abruptly halted, the magnetic field will collapse, releasing the stored energy, which then passes through the inductor. The inductor works by converting the energy from one form (electricity) into another (magnetic field), and vice versa.

Conclusion

The 78F391J fixed inductor is an indispensable component in many electronic circuits, due to its wide range of applications and effective working principle. This component is capable of converting energy from one form into another, making it an invaluable component for electrical engineers. With its wide range of application fields and simple working principle, the 78F391J fixed inductor is well worth considering for use in various electrical projects.

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