3M CN3490 0.5" X 1.25"-250

RFI and EMI shielding and absorbing materials are a vital component of the modern electronics and communication systems. In order to ensure the reliable operation of such systems, it is necessary to be able to protect the components from electromagnetic interference (EMI) and Radio Frequency Interference (RFI). 3M CN3490 0.5" X 1.25"-250 is a type of shielding material used for this purpose and in this article we will discuss its application field and working principle.

3M CN3490 0.5" X 1.25"-250 is a very low profile, highly flexible shielding material that consists of a metallicized polyester film, which is laminated to a silicone adhesive. This material is designed to provide excellent long-term shielding and attenuation performance against EMI/RFI rays, making it the perfect choice for applications where space is limited and high shielding effectiveness is required. The most common applications for this type of shielding material are in aircraft, high-speed data transmission systems, and military communication systems.

3M CN3490 0.5" X 1.25"-250 has a wide range of capabilities when it comes to providing protection against EMI/RFI. The material has a theoretical upper limit of over 500 MHz and is rated at a shielding effectiveness of 60 dB, making it suitable for shielding of weak and intermediate-level radio signals. In addition, the shielding effectiveness of the material is durable, providing long-term reliability without the need for frequent replacements.

The working principle of 3M CN3490 0.5" X 1.25"-250 is based on the fact that it has a metalized inner surface which contains numerous small metallic particles that are distributed randomly throughout the adhesive layer. These particles act as an EMI/RFI shield by providing an electrostatic field which absorbs, reflects, and scatters incoming EM waves. As a result, the devices using this material are able to work without being affected by incoming EM radiation.

Overall, 3M CN3490 0.5" X 1.25"-250 is an excellent choice of EMI/RFI shielding and absorbing material that can be used in various applications. Its wide range of capabilities and excellent long-term performance make it suitable for use in a variety of settings, from aircraft and military communications to high-speed data transmission systems and more.