103-391K

DC Resistance (DCR):	240 mOhm Max
Height - Seated (Max):	0.075" (1.91mm)
Size / Dimension:	0.100" L x 0.100" W (2.54mm x 2.54mm)
Supplier Device Package:	--
Package / Case:	Nonstandard, 2 Lead
Mounting Type:	Surface Mount
Inductance Frequency - Test:	25MHz
Operating Temperature:	-55°C ~ 125°C
Ratings:	--
Frequency - Self Resonant:	235MHz
Q @ Freq:	22 @ 25MHz
Series:	103
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	635mA
Tolerance:	±10%
Inductance:	390nH
Material - Core:	Ferrite
Type:	--
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction to Fixed Inductors

Fixed inductors are passive two-terminal devices that have winding of coil to store energy temporarily in the form of a magnetic field. It is also called as an inductance, because it has the capability to resist the change in current when surrounding electric current changes. Fixed inductors are used in electrical circuits and widely employed in a range of applications such as automotive, telecoms, power supplies, alternative energy and medical equipment.

Types of Fixed Inductors

Fixed inductors are available in a variety of shapes, sizes and winding patterns. Most common types are radial lead inductors, molded inductors, and axial lead inductors. Radial lead inductors are featured with two wire-like terminals, with one end of each wired lead connected to a winding around a single core. A molded inductor has its core and windings encapsulated in molded resin and are exempt from shock, dust and vibration. Axial lead inductors have a longish lead for each terminal, which is causing the entire assembly to look like a spring.

103-391K Application Field and Working Principle

103-391K is a fixed radial-leading inductor widely used in alternative energy solutions such as solar, wind and other energy storage systems. They are also used in rectifier circuits, power supplies and for other filtering requirements.The working principle behind fixed inductors such as 103-391K is based on Faraday’s Law of Induction. This law proposes that an electric current produces a magnetic field around it and this magnetic field will induce an electric current in a nearby conductor. Thus, when a metal coil is surrounded by an electric current, it will also produce an electromagnetic field. This field will induce a voltage across the ends of the coil, opposing the current that created it.103-391K is a fixed radial-leading inductor manufactured with two connections and a wrapping of copper wire. When a alternating current runs through it, the copper wire will create an applicable electromagnetic field around the coil. This field will create a back EMF or Induced Voltage, and induce current to flow through the copper, thus creating self-induction. The induced voltage $$V$$ is proportional to the rate of change of the current through it according to the Faraday’s law of induction, stated as $$V = -L\frac{di}{dt}$$.

Advantages of Fixed Inductors

Fixed inductors are used for many applications due to their numerous advantages. They provide high efficiency, low cost and require minimal maintenance. They are robust and compact in size, and therefore can be used to save space. 103-391K also provides high reliability and protection against shock and vibration. They produce less noise and are free from stability issues. These inductors are especially suitable for high-temperature applications, as they have a better resistance to heat.

Conclusion

Fixed inductors are among the essential components in electronic circuits, and have wide applications in alternative energy solutions. The 103-391K fixed radial-leading inductor is a popular example of such a component, employed in various forms of energy storage systems and power supplies. It is normally used due to its advantages in terms of cost, size, and efficiency. It also offers reliability, resistance to shock and vibration, and high heat resistance.

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