34402

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The application of 34402 materials in RFI and EMI is increasing due to its effectiveness in shielding and absorbing electromagnetic interference (EMI). This article provides an overview of the material, its application field and working principle of 34402 materials.

Basics of EMI and RFI

Electromagnetic interference (EMI) is an unwanted, random electrical signal that can appear on an electrical circuit or system. It can have a detrimental effect on the performance of the system, and can cause distorted signals and interference on receiving systems. Radio frequency interference (RFI) is a subset of EMI, wherein the interference covers frequencies from approximately 30 KHz to 300 GHz.

Applications of 34402 materials in RFI and EMI

The 34402 (ferromagnetic) materials are widely used in EMI and RFI shielding and absorbing materials. The materials are effective in absorbing and deflecting high frequency electric fields, and in dissipating the energy of the EMI or RFI into an acceptable level, thus allowing the electromagnetic shielding of circuits from external disruption. The most common application of 34402 materials is in PCB or flex-rigid boards, wherein the materials are affixed to the surface of a printed circuit board to provide an electromagnetic barrier. Besides, the 34402 ferromagnetic materials are also used for absorptive panels/shields to shield electronic equipment from external EMI sources.

Types of 34402 Materials

34402 materials are typically available in powder, film, and foil forms. The most commonly used form of the material is the powder form, which is available in various sizes and shapes and can be easily applied to PCBs or flex-rigid boards. The powder form is cost-effective, and is usually used for high-frequency EMI or RFI shielding. For low-frequency applications, the film or foil form is more suitable since it provides better coverage over a broader frequency range.

Working Principle of 34402 materials

The working principle of 34402 materials is based on the magnetic shielding effect. The material has the ability to attract and absorb high frequency electric fields, thus providing a “shield” to the system from external interference. This magnetic shielding effect is due to the composition of the material, which is composed mainly of finely divided powdered iron or steel. It is the high frequency magnetic field that is being absorbed by the iron particles, and thus providing effective EMI and RFI shielding.

Advantages of 34402 Materials

The use of 34402 materials in EMI and RFI shielding and absorbing has multiple benefits, such as superior performance, cost-effectiveness, and low magnetic permeability. Due to their magnetic properties, these materials provide high shielding effectiveness (SE) even in the presence of high radiation fields. The powder form of the material is also easy to apply to PCBs or flex rigid boards, which saves time and increases cost-effectiveness. Moreover, the 34402 materials have low magnetic permeability, which is beneficial in applications where EMI effects are more severe, as it minimizes the effect of magnetic flux leakage.

Conclusion

The 34402 material is a versatile, cost-effective, and high-performance material used in EMI and RFI shielding and absorbing devices. The wide range of applications and advantages make it a popular choice for EMI and RFI shielding and absorbing materials in many industries. It is important to understand the material’s working principle, application fields, and composition, as well as the benefits it provides, in order to make informed decisions about its usage in systems.

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