MILS1812-394K

DC Resistance (DCR):	18 Ohm Max
Height - Seated (Max):	0.134" (3.40mm)
Size / Dimension:	0.189" L x 0.134" W (4.80mm x 3.40mm)
Supplier Device Package:	--
Package / Case:	Nonstandard
Mounting Type:	Surface Mount
Inductance Frequency - Test:	790kHz
Operating Temperature:	-55°C ~ 125°C
Ratings:	--
Frequency - Self Resonant:	3.5MHz
Q @ Freq:	40 @ 790kHz
Series:	MILS1812
Shielding:	Shielded
Current - Saturation:	--
Current Rating:	105mA
Tolerance:	±10%
Inductance:	390µH
Material - Core:	Ferrite
Type:	--
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Fixed Inductors

Inductors have become an important and versatile component in electronic circuits due to their remarkable properties. They are used in a wide range of applications from cellular telephones and computer cordless keyboards to automotive sound systems. One of the popular inductors used in various electronic circuit applications is MILS1812-394K. This article aims to explore the application field and working principle of this particular fixed inductor.

The Construction

MILS1812-394K is a fixed inductor that consists of a cylindrical nozzle with two or four pins connected to a cylindrical core which is made of a fermentor, such as iron-nickel alloy, ferrite or ceramic powder. It features a temperature coefficient of 0.05%, a saturated core material, and a high insulation resistance. Due to its low temperature coefficient of 0.05%, the inductance of this inductor is relatively stable at different temperature levels. Besides, the inductor features a small size-to-output ratio due to the sturdy nature of the core material.

The Application

MILS1812-394K, due to its remarkable properties, is often used in different types of applications including switch mode power supplies (SMPS), digital video machines, personal digital assistants (PDAs), and speech processors. This versatile inductor is capable of providing an output ranging from 1 to 5 amps, which is ideal for most low-power applications. Moreover, this inductor is also widely used in automotive audio systems where it is used to filter out audio signals and stabilize the power supply voltage. Its high insulation resistance rating makes it able to resist EMI interference, noise, and vibration. Due to its robust construction and excellent performance in suppressing EMI and noise, it has become an essential element for the automotive electronics industry.

Working Principle

MILS1812-394K implements Faraday\'s law of induction to operate. This law states that when a current is passed through a coil of wire, an electromagnetic field is created around it. This field induces an opposing voltage in the coil, which is known as back emf. This back emf opposes any further current from entering the circuit.The MILS1812-394K has two coils which are wound around the core material. When a current is supplied to the first coil, it creates an electromagnetic field around it which induces an opposing voltage in the second coil. This opposing voltage is the one which limits the current flowing into the circuit. Apart from this, the construction of MILS1812-394K allows for the limitation of power consumption in the circuit. The saturation of the core material ensures that the induction of the entire inductor remains constant, which ensures that the power being consumed by the circuit remains within acceptable limits.

Conclusion

MILS1812-394K is an important component that is used in various electronic circuits. Its design makes it ideal for applications such as switch mode power supplies, digital video machines, and automotive audio systems, as well as in personal digital assistants and speech processors. The MILS1812-394K inductor works on the Faraday’s law of induction, wherein two coils are wound around a core material, resulting in an opposing voltage in the second coil that limits the current entering the circuit. The saturation of the core material also ensures that the power being consumed by the circuit remains within acceptable limits.

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