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RFI and EMI - Contacts, Fingerstock and Gaskets

Radio frequency interference (RFI) and electromagnetic interference (EMI) are common phenomena that affect electronic and electrical systems. In order to reduce the impact of these phenomena, shielding and grounding are typically necessary. Contacts, fingerstock, and gaskets are products typically used to provide RFI and EMI shielding. Understanding the applications and working principles of these products can help users to select the appropriate product for their application.

Contacts and Fingerstock

Contacts and fingerstock are two different types of parts which are used to create electrical and/or RFI/EMI shielding. Both provide electrical continuity between two or more connected parts, while also providing RFI/EMI shielding. Contacts are generally made of metal and can be either soldered or screwed together to provide an electrical connection. Fingerstock, on the other hand, is generally made of plastic and is typically installed by squeezing it between two pieces of metal or plastic.

When used together, contacts and fingerstock provide an effective way to reduce RFI and EMI. In order to be effective, the contact surfaces need to be clean and free of oxidation and debris. When properly installed, contacts and fingerstock will create an effective RFI/EMI shield that will protect the connected parts from RFI/EMI. In some cases, it may be necessary to add additional shielding such as a ferrite core.

Gaskets

Gaskets are also used to create effective RFI/EMI shields. Gaskets are typically made of thin, flexible material such as rubber, neoprene, or dielectric foam. Gaskets can be installed between two pieces of metal or plastic in order to reduce the number of electrical and radio wave leaks. Gaskets should be installed with an appropriate sealant in order to ensure the effectiveness of the RFI/EMI shield. Gaskets can also be used in conjunction with contacts and fingerstock in order to provide additional protection against RFI and EMI.

In order to be effective, gaskets must be selected and installed properly. Gaskets should be of a material and thickness that is appropriate for the application. Care should be taken to ensure that the gasket fits properly and there is enough overlap between the gasket and the connected pieces to create an effective seal. The gaskets should also be properly sealed with an appropriate sealant.

Conclusion

RFI and EMI are important issues which can have a significant impact on electronic and electrical systems. Contacts, fingerstock, and gaskets are commonly used to create effective shields against RFI and EMI. In order to be effective, these products need to be properly selected, installed, and maintained. Understanding the applications and working principles of these products can help users to select and properly install them.

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