PM428S-4R7-RC

DC Resistance (DCR):	70 mOhm Max
Height - Seated (Max):	0.118" (3.00mm)
Size / Dimension:	0.189" L x 0.189" W (4.80mm x 4.80mm)
Supplier Device Package:	--
Package / Case:	Nonstandard
Mounting Type:	Surface Mount
Inductance Frequency - Test:	100kHz
Operating Temperature:	-40°C ~ 125°C
Ratings:	--
Frequency - Self Resonant:	55MHz
Q @ Freq:	8.12 @ 7.96MHz
Series:	PM428S
Shielding:	Shielded
Current - Saturation:	1.3A
Current Rating:	1.55A
Tolerance:	±30%
Inductance:	4.7µH
Material - Core:	Ferrite
Type:	Wirewound
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

Fixed inductors are a significant component in many electronic designs. In particular, PM428S-4R7-RC inductors are widely used because of their high performance, reliable operation, and robust construction. This article will discuss the application fields and working principles of the PM428S-4R7-RC inductor.

Applications

The PM 428S-4R7-RC is an axial leaded, molded, fixed inductor designed for use in a wide variety of DC/DC converters, power supplies, line input filters, consumer electronics, and switching mode power supplies. It features a low DC loss and high operating temperature range that makes it suitable for high power applications. Additionally, this inductor is rated for a wide temperature range of –55°C to +125°C and has a high current resistance of 4.7 ohms. The PM428S-4R7-RC also has a very low core loss compared to other inductors and is capable of carrying peak current surges up to 5 times its rated value. Due to its wide range of features, the PM 428S-4R7-RC can be used in a variety of applications including smoothing of capacitor ripple in power supplies, DC-DC voltage conversion, signal-noise suppression, and EMI/RFI reduction. Additionally, it can be used to reduce the output ripple voltage of DC/DC converters and ensure a higher efficiency. It can also be used to filter out high frequency noise from switching power supplies and other signal sources. Lastly, the PM 428S-4R7-RC can be used to form a second-order LC filter network in signal conditioning applications.

Working Principle

At its core, the PM428S-4R7-RC is an inductor that works based on the principle of Faraday’s Law of Induction. This law states that an electric current that changes in a circuit produces a magnetic field, and that a changing magnetic field in turn induces an electric current. The PM428S-4R7-RC inductor works by promoting the flow of electric current in a certain direction (i.e. the forward direction). An increase in the amount of electric current flowing in the forward direction results in an increase in the amount of inductance. In essence, the PM428S-4R7-RC is a fixed inductor that has an inductance of 4.7 ohms. The inductance of this specific inductor is determined by its core material and number of turns in the coil. Inside the inductor, an electric current carrying a magnetic field passes through a coil of wire that consists of multiple turns. The magnetic flux produced by the current produces an opposing voltage or back EMF in the coil, opposing the flow of the electric current. This opposition to current flow is what makes the PM 428S-4R7-RC an inductor.

Conclusion

The PM428S-4R7-RC fixed inductor is a high performance component designed for use in a variety of power supply and signal-noise suppression applications. It is capable of carrying high surge currents and is noted for its low DC losses and high operating temperature range. This inductor works by utilizing the Faraday’s Law of Induction, where increasing the amount of electric current flowing in the forward direction increases the amount of inductance. With its robust features, the PM428S-4R7-RC is a reliable and robust inductor, making it a popular choice for many electronic designs.

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