5-CN4190-3/4S

Series:	CN-4190
Part Status:	Obsolete
Type:	Shielding Sheet
Shape:	Square
Length:	0.750" (19.10mm)
Width:	0.750" (19.10mm)
Thickness - Overall:	0.004" (0.11mm)
Operating Temperature:	--
Adhesive:	Conductive, Double Sided
Material:	Nickel-Copper (NI/CU) Fabric

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Introduction to RFI and EMI Shielding and Absorbing MaterialsRFI and EMI (Radio Frequency Interference and Electromagnetic Interference) Shielding and Absorbing Materials are used to block and absorb electromagnetic interference (EMI) and radio frequency interference (RFI). The materials typically used for this purpose include plastics, foams, fabrics, films and foils, as well as metals such as copper, nickel, aluminum, and stainless steel. These materials are often used in the industry to reduce the interference generated by radio and electronic devices. The aim of RFI and EMI shielding and absorbing materials is to provide a barrier between sensitive electronic equipment and the interfering source of electromagnetic radiation. Shielding typically consists of a continuous metal or conductive foam barrier, while absorbing materials are typically designed to contain and dissipate the energy released by the interference.What Is 5-CN4190-3/4S?5-CN4190-3/4S is a type of high performance, low cost, and light weight RFI/EMI shielding and absorbing material from ShunFung Technology Co., Ltd. It is designed to shield and absorb low to medium frequency electric and magnetic fields associated with RFI/EMI interfering sources such as cellular phones, computers, radio and television towers, and power lines.5-CN4190-3/4S consists of a cross-linked, closed cell, low density polyethylene (LDPE) foam material with a thin copper mesh coated with a polyurethane coating. The cross-linked configuration ensures no direct path between the conductors and the interference source and provides an effective shield against both electric and magnetic fields. The low density polyethylene foam material is also resistant to most common chemicals and is designed to be both flame-resistant and non-corrosive. The thin copper mesh, meanwhile, provides additional shielding and absorbing ability. Lastly, the polyurethane coating acts as an additional protective coating for the copper mesh.Applications of 5-CN4190-3/4SThe main application of 5-CN4190-3/4S is in the electronic industry. It is often used in the production of electronic products as a shield against RFI and EMI interference. Common applications of this type of material include shielding and absorption of RF and microwave signals in:

• Radio, television and communication equipment
• Automotive and aerospace applications
• Medical and industrial equipment
• Radar systems
• Consumer electronics (including smartphones and laptops)

5-CN4190-3/4S is also commonly used in the residential and commercial construction industries for shielding and absorbing of RFI and EMI interference. It is used to shield walls, floors, and roofs, as well as being a component of shielding screens used to protect against external interference.Working Principle of 5-CN4190-3/4SThe working principle of 5-CN4190-3/4S is based on the concept of Faraday cages. A Faraday cage is a type of device designed to block the entry or exit of electric fields. This is achieved by using a mesh of conductive material such as copper or aluminum to create a barrier around a space or object. In the case of 5-CN4190-3/4S, the thin copper mesh forms the Faraday cage around the material. The mesh acts as a barrier, blocking the electric and magnetic fields associated with RFI and EMI sources from entering or exiting the material. The polyurethane coating provides an additional layer of protection and insulation as well as further blocking of fields.Conclusion5-CN4190-3/4S is an effective shielding and absorbing material for RFI and EMI sources. It has multiple applications in the electronic and construction industries and its Faraday cage principle provides reliable shielding from interference. It is a cost effective, lightweight, and flexible solution for those needing protection from electromagnetic interference.

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