Series:	PMH
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Filter Type:	--
Number of Lines:	1
Impedance @ Frequency:	120 Ohms @ 100MHz
Current Rating (Max):	3A
DC Resistance (DCR) (Max):	30 mOhm
Ratings:	--
Operating Temperature:	-55°C ~ 125°C
Package / Case:	1812 (4532 Metric)
Mounting Type:	Surface Mount
Height (Max):	0.059" (1.50mm)
Size / Dimension:	0.177" L x 0.126" W (4.50mm x 3.20mm)

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Background

Ferrite beads and chips are frequently used in the electronics industry to help reduce the penetration of electromagnetic interference (EMI) and radio frequency interference (RFI). The PMH1812-121 is a ferrite bead that is designed for these uses, and is typically found in automotive, avionics, and other electrical systems.

PMH1812-121 Application Field and Working Principle

The PMH1812-121 is typically used in a headlight control module, or HCM, which acts as a circuit board that controls the operation of a car’s headlights. It works to create electrical resistance which then helps to reduce the amount of EMI and RFI interference that can enter into the system. The PMH1812-121 works by creating a magnetic field around the components and/or wires that will prevent EMI and RFI from entering and interfering with their functioning.The PMH1812-121 is also used in applications such as in-cabin electronics, navigation systems, wireless communications, and audio systems. It works by absorbing EMI and RFI waves from the circuit, and then dissipating them through a small amount of electrical resistance. As the beads heat up, they act as a filter to block out any potential noise or interference, thus allowing the electronics to remain functioning at optimal levels. By using the PMH1812-121, users can be sure to provide the best possible protection against EMI and RFI in their systems.When installing the PMH1812-121, it is important to follow the manufacturer\'s instructions to ensure maximum performance. The beads should be installed as close to the electronic circuits as possible, without coming in contact with any components. They should also be firmly connected into the PCB or wires, using soldered and insulated connections. In addition, it is important to pay close attention to the power ratings of the beads and the temperature requirements for each application.

Benefits of Using Ferrite Beads & Chips

The use of the PMH1812-121 ferrite bead and chip offers many benefits. As previously mentioned, it helps reduce EMI and RFI interference, thus ensuring that the electronic components of a system are safe from any potential disruptions. In addition, ferrite beads and chips are incredibly cost-effective, require little to no maintenance, and can be easily installed without the need for special tools or equipment. The PMH1812-121 is extremely reliable and resistant to temperature changes, making it ideal for a wide variety of applications. As a result, it is considered to be one of the most popular ferrite beads and chips used in the electronics industry.

Conclusion

The PMH1812-121 is a widely used ferrite bead and chip that provides excellent protection against EMI and RFI, and is reliable, cost-effective, and easy to install. When used in headlight control module systems, navigation systems, wireless communications, audio systems, and any other application involving electronic components, the PMH1812-121 can help ensure that the system is running at optimal levels and is protected from any potential interference.

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Part Number	Manufacturer	Price	Quantity	Description