HKQ04021N8C-T Inductors, Coils, Chokes

DC Resistance (DCR):	190 mOhm Max
Height - Seated (Max):	0.009" (0.23mm)
Size / Dimension:	0.016" L x 0.008" W (0.40mm x 0.20mm)
Supplier Device Package:	01005 (0402 Metric)
Package / Case:	01005 (0402 Metric)
Mounting Type:	Surface Mount
Inductance Frequency - Test:	500MHz
Operating Temperature:	-55°C ~ 125°C
Ratings:	--
Frequency - Self Resonant:	10GHz
Q @ Freq:	11 @ 500MHz
Series:	HK, Q Type
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	320mA
Tolerance:	±0.2nH
Inductance:	1.8nH
Material - Core:	Ceramic
Type:	Multilayer
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

The HKQ04021N8C-T is a fixed inductor from Murata manufacturing, used widely in the electronic devices and circuits. It is typically called a ferrite core coil, sometimes referred to as a power inductor. The HKQ04021N8C-T inductor is classified as a “Fixed” inductor due to the fixed amount of resistance (inductance) offered by its core construction and windings.

Application Field

The HKQ04021N8C-T inductor is mainly utilized in switching power supplies and DC-DC converters. These power supplies and converters usually have high-efficiency rates and a compact design. Moreover, these power supply/converter components have an extremely fast switching speed, which further increases efficiency and decreases size.In addition to power supplies and converters, the HKQ04021N8C-T inductor is used in automotive circuit boards, such as ignition coils, alternators, and pedestrian detection systems. Furthermore, these types of inductors are used in the consumer electronics industry, such as cell phones, LCD TVs, and digital cameras.

Working Principle

The HKQ04021N8C-T inductor works based on the principle of electrolytic capacitors. When voltage is applied to an electrolytic capacitor, due to the electrolyte within the capacitor, an electric field is created that forces the current flow in two directions simultaneously. The HKQ04021N8C-T has this same principle but its ferrite core is instead used to produce a magnetic field.The magnetic field produced by the core absorbs the alternating current (AC) of the voltage signal and stores it, allowing for efficient conversion into direct current (DC). It essentially “holds” the energy, ensuring that the called upon current is available before the system needs it to sustain the load. This process helps to maintain the power supply or other system’s efficiency.

Conclusion

The HKQ04021N8C-T inductor is a type of fixed inductor known for its quality, efficiency, and longevity. It is used in a multitude of applications ranging from automotive circuit boards and consumer electronics to switching power supplies and DC-DC converters. The HKQ04021N8C-T inductor works using the principle of electrolytic capacitors, producing an AC signal which is stored and then converted into a DC signal. These inductors are reliable and trusted components in today’s electronic age.

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