CDRH74-391MC Inductors, Coils, Chokes

DC Resistance (DCR):	2.85 Ohm Max
Height - Seated (Max):	0.177" (4.50mm)
Size / Dimension:	0.287" L x 0.287" W (7.30mm x 7.30mm)
Supplier Device Package:	--
Package / Case:	Nonstandard
Mounting Type:	Surface Mount
Inductance Frequency - Test:	1kHz
Operating Temperature:	-40°C ~ 100°C
Ratings:	--
Frequency - Self Resonant:	--
Q @ Freq:	--
Series:	CDRH74
Shielding:	Shielded
Current - Saturation:	--
Current Rating:	290mA
Tolerance:	±20%
Inductance:	390µH
Material - Core:	Ferrite
Type:	--
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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IntroductionFixed inductors are highly important components in a wide variety of electronics where they are used to create inductance that is not adjustable. Inductors play a critical role in the operation of many electronic circuits, including the operation of signal processors, power supplies, digital logic systems, and electromagnetic interference (EMI) filters. The CDRH74-391MC fixed inductor is designed to provide maximum energy storage with a very small footprint. This small footprint is ideal for high-density applications such as mobile devices and electronic instrumentation.CDRH74-391MC Application Field and Working PrincipleThe CDRH74-391MC fixed inductor is designed to provide an inductance of 4.7uH with an inductance tolerance of ±20%. This makes it suitable for a wide range of applications including RF circuits, power supplies, DC-to-DC converters, DC-to-AC inverters, electronic loads, and many other power electronic circuits. The device has a saturation current of 0.9A and a maximum self-resonance frequency of 400 MHz. The device has a low DCR of 0.062Ω and a high inductance stability over a wide temperature range of -55°C to 125°C.The device features a small ferrite core that provides a high inductance in a small package without the use of a ferrite rod. The core is magnetically shielded and provides a high degree of EMI protection. The inductor is composed of two electrical windings, a primary winding and a secondary winding. The primary winding is connected to the input voltage source and the secondary winding is connected to the load. The device is designed so that when an alternating current (AC) signal passes through the primary winding, a magnetic field is generated, which induces an EMF (electromotive force) in the secondary winding. The magnitude of the induced EMF depends on the inductance of the device and the frequency of the input signal.ConclusionThe CDRH74-391MC fixed inductor is a high-quality inductor that provides a wide range of applications from power electronics to RF circuits. Its small size and high inductance stability make it an ideal choice for high-density applications such as those found in mobile devices. Its magnetic shielding provides a high degree of EMI protection, making it suitable for EMI sensitive applications. By utilizing the primary and secondary windings of the device along with the ferrite core, the CDRH74-391MC is able to provide a high inductance with very low DCR and an excellent frequency response.

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