3M CN4490 CIRCLE-0.875"-250

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RFI and EMI - Shielding and Absorbing Materials

The 3M CN4490 CIRCLE-0.875"-250 is a type of conductive material used primarily in the fields of radio frequency interference (RFI) and electromagnetic interference (EMI). It is a one-piece dielectric material that is well suited for use in a wide variety of applications. It is capable of shielding and absorbing both RF and EMI signals effectively, making it an important material in the fields of electronic components and circuit boards.The 3M CN4490 CIRCLE-0.875"-250 is a circle with a 0.875-inch diameter and a thickness of 250 mils. It contains conductive polymer particles that have been electrostatically bonded, forming an oxide-free layer that helps reduce the electrical noise. In addition, the 3M CN4490 is also available in a variety of sizes, ranging from 0.125" in diameter to 6.0".The 3M CN4490 CIRCLE-0.875"-250 is ideal for use in applications such as RF and EMI shielding, EMI absorption, as well as for printed circuit boards and semiconductor packaging. It is a low-cost, low-profile solution that offers excellent electrical performance due to its electrostatic bonding. This material is also highly electrically conductive, and is resistant to moisture, vibration, and thermal shock.The 3M CN4490 CIRCLE-0.875"-250 has become an increasingly popular choice for use in the EMI industry. Its low cost, excellent electrical performance, and wide range of sizes makes it suitable for a variety of applications. It has the ability to reduce EMI and RFI signals, making it an effective material in the fields of electronic components, circuit boards, and semiconductor packaging.In order to use the 3M CN4490 CIRCLE-0.875"-250 effectively, it must be placed in a metal enclosure. The metal enclosure provides a barrier between the EMI or RFI source and the outside environment, thus allowing the conductive material to perform its function. The metal enclosure also prevents interference from outside sources and keeps the source material within its intended range.The working principle of the 3M CN4490 CIRCLE-0.875"-250 is based on the principles of electromagnetic shielding and absorption. The conductive particles within the material act to absorb incoming electromagnetic energy. This absorbed energy is then dissipated within the material, reducing the amount of interference that is transmittable to other components. The 3M CN4490 CIRCLE-0.875"-250 is designed to work within certain frequency ranges, making it suitable for specific applications.The 3M CN4490 CIRCLE-0.875"-250 is a highly effective material for EMI and RFI shielding and absorption. Its low cost, wide range of sizes, and excellent electrical performance makes it a popular choice for a wide variety of applications. It is also capable of dissipating electromagnetic energy, helping reduce interference and making it an important material in the production of electronic components, circuit boards, and semiconductor packaging.

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