PMH1806-800

Series:	PMH
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Filter Type:	--
Number of Lines:	1
Impedance @ Frequency:	80 Ohms @ 100MHz
Current Rating (Max):	1A
DC Resistance (DCR) (Max):	30 mOhm
Ratings:	--
Operating Temperature:	-55°C ~ 125°C
Package / Case:	1806 (4516 Metric)
Mounting Type:	Surface Mount
Height (Max):	0.063" (1.60mm)
Size / Dimension:	0.177" L x 0.063" W (4.50mm x 1.60mm)

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Ferrite Beads and Chips

Ferrite beads and chips are used to suppress electrical noise on a cable or a device\'s power supply lines. Referred to as “common mode noise”, these spikes can be caused by power or ground surges, and can interfere with the functioning of sensitive electronics. PMH1806-800 is a small ferrite bead designed for use on power or ground planes, typically with surface-mount applications. This article will cover the application field and working principle of PMH1806-800.

Application Field

PMH1806-800 is an ideal Filtering Application for High-Speed Bus Line Networks, such as USB 3.1 Gen 2 and HDMI 2.0. By suppressing high frequency EMI/EMC common mode noise, this ferrite bead can be used as a part of noise reduction system of the above buses, in order to meet stringent guidelines stipulated by the World Health Organization. It is also used in noise reduction of DC motors such as induction motors, which are powered by PM HUB motors, or applications with high switching frequencies.

Working Principle

The working principle of PMH1806-800 is based on the principle of electromagnetism. It is a so-called common mode line filter, which helps to suppress common mode noises. The filter consists of a ferrite chip (core) and inductive coils. The chip has two sets of coils, one each for the positive and negative leads of the signal. The coils are wound around the ferrite chip, and when a signal is transmitted along the line, the coils act as a filter to oscillate, dampen, or reflect any noise that is present, reducing the amount of EMI noise that is transmitted through the cables.In addition, the current passing through the coils of the filter causes a changing magnetic field around the coils, which then interacts with the ferrite chip. In this way, the ferrite chip helps to absorb any noise on the line, allowing only the desired signal to be transmitted.

Conclusion

PMH1806-800 is an effective filtering application for eliminating high frequency EMI/EMC common mode noise, as well as noise from various other sources. The ferrite chip and inductive coils are able to absorb or reflect any noise on the line, allowing only the desired signal to be transmitted. This power line filtering solution is perfect for a wide range of applications, providing a reliable solution for noise reduction.

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