S1812-823F

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Fixed inductors come in a wide variety of formats and functions to fit the particular application needs of a circuit design. However, the S1812-823F, a fixed inductor from Murata, has the unique feature of excellent noise suppression and low electric resistance. In this article, we will look at its application field and the working principle of the S1812-823F.

Application field

The S1812-823F (also known as the S1812SE-823F) is a surface-mount type inductor that is primarily used in noise suppression and impedance matching for radio frequency and high frequency applications. Such applications include but are not limited to wire and cable systems, avionics, RFID (Radio Frequency Identification) systems, and DC-DC converters. The S1812-823F is also suitable for EMI filtering in consumer electronics such as cellphones, laptop computers, smart televisions, and others. This part is also suitable for switching power supplies and DC-AC inverters.

Working principle

The S1812-823F is an SMT inductor with a winding primary and ferrite core that produces a sinusoidal magnetic flux wave. At low frequencies, the S1812-823F operates as a low-pass filter to reduce or eliminate noise signals. As the frequency increases, the magnetic flux wave becomes more capacitive and acts as an impedance matching device. This impedance matching allows the S1812-823F to reduce loss of power transmission at very high frequencies.

The S1812-823F has an impedance of 18uH with a DC resistance of 0.12 ohms, and its rated current is 0.8 amps. It has a rated direct current inductance of 6.0 uh. The S1812-823F is rated at operating temperatures of -40°C to +105°C, and its case size is 8mm x 8mm x 7.3mm.

Conclusion

The S1812-823F is an SMT inductor from Murata that can be used in a variety of RF and high frequency applications, including EMI filtering, impedance matching, and noise suppression. Its impedance of 18uH with a DC resistance of 0.12 ohms and its rated current of 0.8 amps make it suitable for many consumer electronics and computer applications. Its rated direct current inductance of 6.0 uh and 8mm x 8mm x 7.3mm size allow it to fit in any circuit design.

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