PM2120-4R7M-RC

DC Resistance (DCR):	5 mOhm Max
Height - Seated (Max):	0.820" (20.83mm)
Size / Dimension:	1.201" L x 1.000" W (30.50mm x 25.40mm)
Supplier Device Package:	--
Package / Case:	Nonstandard
Mounting Type:	Surface Mount
Inductance Frequency - Test:	1kHz
Operating Temperature:	-55°C ~ 105°C
Ratings:	--
Frequency - Self Resonant:	--
Q @ Freq:	--
Series:	PM2120
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	16.6A
Tolerance:	±20%
Inductance:	4.7µH
Material - Core:	Iron
Type:	Toroidal
Part Status:	Active
Packaging:	Bulk

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Fixed Inductors

A fixed inductor, also known as a choke, is a passive electrical device that stores energy in the form of a magnetic field when a current flows through it. Unlike resistors, they act to reduce the AC waveform of the current while passing the DC component unchanged. PM2120-4R7M-RC is a specific model of a fixed inductor, used in various applications.

PM2120-4R7M-RC Application Field

PM2120-4R7M-RC has become one of the most popular fixed inductor models due to its wide range of applications, including:

• DC-to-DC Switching Converters: Reduces noise in power supplies coming from a DC voltage source, providing stable ground references.
• Audio Equipment: Filter circuits used by audio amplifiers, eliminating high frequency noises.
• RF Equipment: Use of inductors to ensure that the right frequency is being sent.
• LM-79 Lighting: Use as a dimmer for LED lamps during dimming.

PM2120-4R7M-RC Working Principle

The PM2120-4R7M-RC is a multi-layer, wire-wound inductor that consists of two windings of copper wire. It passes electrical current through and stores energy from the current in the form of a magnetic field.When an electric current passes through the PM2120-4R7M-RC, it induces an electromagnetic field in the inductor, creating a “magnetic field” that allows for the storage of energy. This magnetic field stored can cause a current to be generated back into the device.The unique design of the PM2120-4R7M-RC allows it to regulate the current so that the voltage is kept constant. This ensures that the current passes through the inductor at the same rate, preventing any over voltage from occurring. The PM2120-4R7M-RC can act as a choke and filter, protecting sensitive AC circuits and devices from high frequency noise, such as spikes and surges. This helps to prevent electrical overload and prevent any potential damage due to a surge of power.

Conclusion

The PM2120-4R7M-RC is a multi-layer, wire-wound inductor with two windings of copper wire. It is used in a variety of applications due to its ability to regulate the current and to act as a choke and filter to protect sensitive AC circuits and devices. Its design allows it to store energy in the form of a magnetic field, and to reduce the AC component of the current while passing the DC component unchanged.

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