3M CN4190 CIRCLE-2"-100

Series:	CN-4190
Part Status:	Obsolete
Type:	Shielding Sheet
Shape:	Circular
Length:	--
Width:	2.000" (50.80mm)
Thickness - Overall:	0.004" (0.11mm)
Operating Temperature:	--
Adhesive:	Conductive, Single Sided
Material:	Nickel-Copper (NI/CU) Fabric

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RFI and EMI – Shielding and Absorbing MaterialsThe Radio Frequency Interference (RFI) and Electro Magnetic Interference (EMI) are a top concern of many engineers and technology professionals. RFIs and EMIs can cause interference to any electronic system and devices, and even disrupt the Internet. In order to reduce or prevent the interference, shielding and absorbing materials are used. One of the most popular shielding materials for EMI and RFI is 3M CN4190 CIRCLE-2" – 100. This article will discuss the application field and working principle of this shielding material.3M CN4190 CIRCLE-2" – 100 is a flexible self-adhesive foil shielding material. It is designed for moderate protection needs and provides 80 dB of shielding efficiency. It has an extremely wide frequency range, which makes it suitable for a variety of applications, from low frequency EMI to high frequency RFI. The sheared metal edges are self-cleaning, giving the material superior edge-to-edge shielding. It also has conductive properties, meaning it can be used as a grounding material as well. It is moisture resistant and can be used in temperatures ranging from -40 to 200 degrees Celsius.One of the main applications of 3M CN4190 CIRCLE-2" – 100 is for military applications. Because of its efficient shielding capabilities, it is often used to provide protection to military communication equipment and other sensitive electronics. It is also used in the medical electronics industry, where its flexible construction makes it ideal for shielding ultrasound machines, X-ray machines, and other medical imaging equipment. In the semiconductor industry, it is used to protect delicate wafers from EMI. 3M CN4190 CIRCLE-2" – 100 is also used in the automotive industry for EMI and RFI protection in antennae, cabin roofs, and other areas.The working principle of 3M CN4190 CIRCLE-2" – 100 is based on a “scattering technique”. This technique refers to the scattering of incident EMI away from the product, rather than reflecting it back. The material works by absorbing and dissipating incident EMI energy away from sensitive electronics. This is achieved by wrapping the material around the device or product, and connecting it to the ground to create a Faraday cage. The Faraday cage will block EMI from entering the enclosed environment, while at the same time allowing air and signals to pass through.3M CN4190 CIRCLE-2" – 100 is a versatile shielding material and is used in a variety of applications. Its wide frequency range and efficient shielding capabilities make it perfect for protecting electronic equipment from EMI and RFI. With its flexible construction, it is ideal for military and medical applications, as well as automotive and semiconductor applications. Furthermore, its working principle based on a “scattering technique” ensures that it is able to provide efficient shielding. Therefore, it is an invaluable material for any engineer or technology professional who needs to reduce or prevent EMI and RFI interference in their electronic systems.

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