CR75NP-3R9MC

DC Resistance (DCR):	27.3 mOhm Max
Height - Seated (Max):	0.217" (5.50mm)
Size / Dimension:	0.307" L x 0.276" W (7.80mm x 7.00mm)
Supplier Device Package:	--
Package / Case:	Nonstandard
Mounting Type:	Surface Mount
Inductance Frequency - Test:	7.96MHz
Operating Temperature:	-40°C ~ 100°C
Ratings:	--
Frequency - Self Resonant:	24.6MHz
Q @ Freq:	--
Series:	CR75
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	3.5A
Tolerance:	±20%
Inductance:	3.9µH
Material - Core:	Ferrite
Type:	Wirewound
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction to Fixed Inductors

Fixed inductors are electronic components used to store electrical energy in the form of magnetic energy and to control the flow of electricity in a circuit. Fixed inductors are made up of a core material, usually ferromagnetic, and a conductor, usually wound into a coil or inductor. In their most common form, they are used to block the flow of alternating current (AC), while allowing direct current (DC) to flow freely.Fixed inductors are found in a wide variety of applications, from aerospace to consumer electronics. They can be used to serve a variety of purposes, such as converting voltage, filtering frequencies, providing power supply regulation, and more. In addition, fixed inductors are essential components of resonant circuits, used to create and sustain frequency-dependent voltage or current signals.

CR75NP-3R9MC Application Field and Working Principle

The CR75NP-3R9MC is a fixed inductor manufactured by Coilcraft. It is a 75 ohm, 1.9 millihenry (mH) non-shielded inductor, rated for operation up to 250 mA (maximum DC current) and 500 volts (DC blocking voltage). Its insulation resistance is 1000 Megohms (at 500 volts DC). The CR75NP-3R9MC is primarily used in a variety of automotive and consumer electronics applications. It is used as a decoupling and power supply filter for audio, video, and other signal circuits. It is also used in power sequencing for automotive levels, amplifiers, and other control circuits. It can also be used to block DC current while allowing AC current to pass freely. The working principle of the CR75NP-3R9MC is based on Faraday’s Law of Induction. When a current passes through the coil, a magnetic field is generated as the electrons in the wire react to the current. This magnetic field creates an opposing voltage, which opposes the flow of current. As the current increases, the magnetic field grows stronger, resulting in an increase in the opposing voltage. This opposing voltage is what gives the inductor its impedance. As the current decreases, the inductor releases energy back into the circuit, maintaining a steady flow of current.

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