5-CN4490-2

Series:	CN-4490
Part Status:	Obsolete
Type:	Shielding Sheet
Shape:	Circular
Length:	--
Width:	2.000" (50.80mm)
Thickness - Overall:	0.002" (0.05mm)
Operating Temperature:	--
Adhesive:	Conductive, Double Sided
Material:	Nickel-Copper (NI/CU) Fabric

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Overview

RFI and EMI Shielding and Absorbing Materials are designed to protect electronic equipment and mechanisms from the deleterious effects of electromagnetic interference (EMI) and radio frequency interference (RFI). 5-CN4490-2 is one of the most commonly used shielding and absorbing materials, and is widely used in electronic, electrical, and other industries. This article will explain the application field and working principle of 5-CN4490-2.

Application Field of 5-CN4490-2

The 5-CN4490-2 shielding and absorbing material was developed by the U.S. Navy to protect naval vessels and other equipment from EMI and RFI. It has excellent EMI shielding and absorption performance and has been approved for use in both commercial and military applications. Among these applications, the 5-CN4490-2 is frequently used to protect sensitive equipment, such as radar systems, computers, radio transmitters, and navigation systems. It is also often employed in the automotive industry to protect components and devices from EMI and RFI. In addition, 5-CN4490-2 protection is often used to enclose other shielded enclosures, such as RF attenuators, as an additional layer of protection against EMI and RFI interference.

Working Principle of 5-CN4490-2

The 5-CN4490-2 shielding and absorbing material works by acting as an electromagnetic shield that prevents electromagnetic interference (EMI) signals and radio frequency interference (RFI) signals from entering or leaving an enclosed system. When an electromagnetic field or a radio frequency wave passes through the material, it is blocked or absorbed by the metal mesh layer, absorbing the energy and preventing the signals from entering or leaving the system. The material is also designed to absorb vibrations, further shielding the enclosed system from any external sources of interference.The metal mesh layer is made of a combination of aluminum and copper alloy and is woven into a flexible mesh. The mesh is then embedded in a layer of rubber and foam to form a multi-layered sandwich. The upper layer consists of a soft foam material that absorbs radio frequency signals and helps to reduce vibrations, while the bottom layer of rubber provides a flexible, yet robust barrier to protect the interior of the system from any potential electromagnetic or radio frequency interference.The 5-CN4490-2 shielding and absorbing material is highly effective at blocking or absorbing different forms of EMI and RFI, from low frequency signals (LF) to high frequency signals (HF). The material can also protect against static electricity and other sources of electro-magnetic pollution. The material is extremely durable and can withstand harsh environments, making it suitable for use in both military and civilian applications.

Conclusion

5-CN4490-2 is a shielding and absorbing material developed by the U.S. Navy to protect sensitive equipment from EMI and RFI. It is composed of a metal mesh embedded in a layer of rubber and foam and can effectively block or absorb different forms of interference. The material is widely used in military and civilian applications and can withstand harsh environments, making it an ideal choice for shielding and absorbing electronics.

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