3M CN4190 1" X 4"-100

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RFI and EMI shielding and absorbing materials are designed to reduce the emission of electromagnetic radiation caused by electronic components. 3M CN4190 1” X 4”-100 is one such material that is widely used for this purpose. It is a flexible, copper-coated fabric coating designed for use in EMI/RFI shielded enclosures. It provides broad-band electrical shielding against high-frequency electromagnetic fields in the MHz to GHz range, and is capable of absorbing up to 10 dB of incident electromagnetic energy.

The 3M CN4190 1” X 4”-100 is designed for use in computer systems, microwave ovens, laboratory equipment, radio frequency applications, cellular telephones, and military electronics. It can be used for both shielding and absorbing applications, and it is ideal for use in high-density, high-speed applications. It has a UL 943 Class B rating for electrical shielding, and provides flame retardancy up to 1.5mm thickness.

The 3M CN4190 1” X 4”-100 is a woven metallic fabric containing a combination of copper and polyester fibers. The copper threads are twisted around the polyester fibers and then plated with a tin coating to form a corrosion resistant material. Copper fibers are electrically connected to the surface of the product by means of a tinned copper alloy layer. This layer helps reduce electrical losses across the material and provides a smooth barrier against EMI. The base copper EMI shielding layer provides improved performance against high-frequency EMI.

The working principle of 3M CN4190 1” X 4”-100 is based on the principles of EMI shielding and absorbing. It works to reduce the electromagnetic emission from electronic equipment by providing a Faraday shield, which effectively blocks the radiation from penetrating the enclosure. It also absorbs high-frequency electromagnetic fields in the MHz to GHz range, thus helping to reduce the amount of energy that is emitted. Finally, the copper-polymer composite fabric is designed to reduce electrical losses across the material, providing a low electrical resistance and reduced power consumption.

The 3M CN4190 1” X 4”-100 makes an ideal choice for uses requiring effective EMI/RFI shielding solutions. It is lightweight, flexible, and offers excellent high-frequency performance and broad-band electrical shielding. Its corrosion resistant and flame retardant properties help ensure reliable use, while its UL 943 Class B rating further ensures safe operation in the applicable electrical field. It is an excellent choice for use in shielded enclosures for computer systems, microwave ovens, laboratory equipment, radio frequency applications, cellular telephones, and military electronics.

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