SL1215-221K1R0-PF

Series:	SL
Packaging:	Tray
Part Status:	Obsolete
Type:	Wirewound
Material - Core:	--
Inductance:	220µH
Tolerance:	±10%
Current Rating:	1A
Current - Saturation:	1.9A
Shielding:	Unshielded
DC Resistance (DCR):	260 mOhm Max
Q @ Freq:	--
Frequency - Self Resonant:	--
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Through Hole
Package / Case:	Radial
Supplier Device Package:	--
Size / Dimension:	0.472" Dia (12.00mm)
Height - Seated (Max):	0.591" (15.00mm)

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Fixed Inductors

Fixed inductors are passive electronic components that are generally composed of a copper winding that stores energy in the form of a magnetic field when an electric current is flowing through it. This energy is then slowly released back into the electrical cirquit when the current is cut off, allowing for the electric currents in the cirquit to maintain their integrity and direction. In recent years, the size of such coil components has become much smaller, and they are now also being used in a wide range of applications as well from Circuit boards to power supplies.The SL1215-221K1R0-PF is an example of such a fixed inductor, and here we will be discussing its primary application field and working principle.

Application Field

The SL1215-221K1R0-PF fixed inductor is primarily designed for use as an audio filter in home theater systems and similar applications. Its design features a core making it capable of providing a constant and steady audio signal regardless of the frequency. They are also often used in audio equipments for signal processing, such as amplifiers.

Working Principle

Coils, as mentioned, store energy in the form of a magnetic field when an electric current is flowing through it. When the current is cut off, the stored energy is slowly released back into the circuit, which maintains the signal integrity. This is the basic working principle of the SL1215-221K1R0-PF fixed inductor.The actual physical construction and design of the component is what makes it work differently from other types, however. Essentially, it consists of a helical core that are made out of two separate coils. These two coils are wrapped in a single magnetic core that allows for the flux created by the electric current to be refocused and extended through the same path without any loss. This design also enables the SL1215-221K1R0-PF to have a much higher internal impedance compared to other types, which further increases its effectiveness in audio applications.

Conclusion

The SL1215-221K1R0-PF fixed inductor is primarily used as an audio filter in home theater systems and similar applications, primarily due to its unique design and working principle. It consists of a helical core that are made out of two separate coils that are wrapped in a single magnetic core. This design allows for the flux created by the electric current to be refocused and extended through the same path without any loss, which further increases its effectiveness in audio applications.

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