MIL1812R-271K

DC Resistance (DCR):	450 mOhm 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:	25MHz
Operating Temperature:	-55°C ~ 125°C
Ratings:	--
Frequency - Self Resonant:	300MHz
Q @ Freq:	30 @ 25MHz
Series:	MIL1812R
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	668mA
Tolerance:	±10%
Inductance:	270nH
Material - Core:	Iron
Type:	--
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Fixed Inductors

Inductors are electronic components that store energy as an electromagnetic field. Fixed inductors are a particular type of inductor, designed to store the same amount of energy for a range of frequencies. The MIL1812R-271K is a surface-mountable, adjustable fixed inductor designed for use in compact, space-limited applications, such as on printed circuit boards. This article will discuss the application fields and working principle of the MIL1812R-271K.

Applications

The MIL1812R-271K is designed to offer highly reliable performance and a high degree of adjustability, making it suitable for a wide range of applications. The device is ideal for use in a variety of applications, including:

• Filtering, matching, and tuning
• Amplifier/filter, speech recognition, and audio applications
• Broadcast and communications equipment
• Automatic test equipment (ATE)
• Industrial process control and motor control
• Small digital circuits

Working Principle

The MIL1812R-271K is an adjustable fixed inductor, meaning that it is set to a specific inductance value. The inductance value is determined by the permeability of the ferrite core it is built around. The inductance of the device is then adjusted by adjusting a variable capacitor across its terminals, which works by ‘tuning’ the air gap between the ferrite core and the variable capacitor. The MIL1812R-271K is an extremely compact and efficient device and operates with a very low profile. This is due to its surface-mountable design and low-profile ceramic construction, which makes it ideal for use in compact, space-limited applications. When the device is exposed to a current, an electromagnetic field builds up within its core, storing energy. This energy is released when the current is stopped and the magnetic field collapses. The amount of energy stored is determined by the inductance of the device and the amount of current that flows through it.

Conclusion

The MIL1812R-271K is a highly adjustable, surface-mountable fixed inductor that is designed for use in compact, space-limited applications. It offers a high degree of reliability and is suitable for a wide range of applications, from filtering and matching to audio and communications equipment. The device operates using a ferrite core, which is adjusted by a variable capacitor to adjust the inductance value. The inductance of the device determines the amount of energy it stores and when exposed to a current, an electromagnetic field builds up within its core.

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