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Introduction

The 3M AB5100HF 4.13" X 4"-5 is a unique electromagnetic shielding and absorbing material designed to meet the requirements of radio-frequency interference (RFI) and electromagnetic interference (EMI). Shielding and absorbing materials are often considered the best defense against unwanted electromagnetic energy.

RFI and EMI - Shielding and Absorbing Materials

What is RFI and EMI?

Radio-frequency interference (RFI) and Electromagnetic interference (EMI) are electronic noise created by electrical or electronic devices that can propagate through air, water, or other matter. Interference occurs when one frequency affects a frequency that is being transmitted. RFI and EMI can be both unintentional and intentional – an unintentional RFI or EMI source could be the result of radiated electromagnetic waves from a nearby cell phone or wireless router, for example. Intentional sources can include powerful radio transmitters and military jamming signals.

Benefits of 3M AB5100HF 4.13" X 4"-5 Shielding and Absorbing Materials

3M AB5100HF 4.13" X 4"-5 is designed for use in electronic equipment enclosures as a protection from RFI and EMI and can be used in a variety of EMC (electromagnetic compliance) applications. The material also functions as an asphalt absorber, offering superior thermal properties and protection from oil, dirt, dust, and other environmental contaminants. Its dielectric strength is 17 KV/µm, with losses creeping in at 40 to 80 dB.

In addition, 3M AB5100HF 4.13" X 4"-5 provides a natural barrier to both radiation and conductive intrusion, allowing for additional protection against electrical arcing. The shielding material also offers enhanced durability, as it resists chemicals, humidity, and extreme temperatures.

Application Field and Working Principle

3M AB5100HF 4.13 X 4"-5 can be used in a variety of EMC (electromagnetic compliance) applications, such as mobile phones and car stereo systems. It is especially suitable for high-reliability applications, such as computer memory modules and automotive EMC shielding against emissions. This shielding material also offers excellent grounding for structures, such as amplifiers, medical diagnostic equipment, RF (radio frequency) Measurement Instruments, and RF Communications systems.

The working principle of RFI and EMI shielding materials is based on Faraday Cage principles. A Faraday Cage is an enclosure made of conducting material, such as metal, that reduces or eliminates external electric fields by redirecting incoming electromagnetic energy. This shielding works by distributing incoming energy through itself, dissipating it from the area within the shielding material. Shielding materials effectively attenuate electromagnetic energy that enters into it, preventing it from entering or leaving the application.

Conclusion

3M AB5100HF 4.13" X 4"-5 shielding and absorbing materials offer an efficient and cost-effective solution to RFI and EMI protection. The shielding material is self-adhesive, reliable, and easy to install, making it suitable for a variety of EMC applications. Additionally, its excellent thermal properties make it an ideal solution for EMI and RFI shielding.

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