0097097501

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RFI and EMI – Contacts, Fingerstock, and Gaskets

There are a variety of components used in electronic applications to manage radio frequency interference and electromagnetic interference (RFI/EMI) which are generally referred to as RFI/EMI contacts, fingerstock, and gaskets. Each application’s intended purpose relates to shielding a given connection or opening from the negative influences of external elements. RFI/EMI containment can be achieved through a variety of solutions, and the products which comprise the range discussed here have been developed in order to help meet most customer requirements.

0097097501 Application Field and Working Principle

RFI/EMI contacts are typically available in two main designs; those meant for crimp-style assembly and those requiring soldering. The crimp-style contact is the more common, as it provides a quick and secure solution. Solder type contacts are more typically used in applications where high temperature and resistance to corrosion are important. An RFI/EMI contact is typically constructed of copper alloy, stainless steel, zinc plated steel, or copper in either flat or bent shapes. Its primary purpose is to prevent electromagnetic and radio frequency interference from entering or leaving a connection.

Fingerstock is a relocatable metal strip which can be used to enclose or partially enclose a joint, seal, or seal element. Typically, this type of product is constructed from stainless steel, high copper content steel, or copper-bronze alloy and can function as part of an RFI/EMI solution. It is usually necessary to slightly form fingerstock to account for surface irregularities, and it is recommended that fingerstock be attached to the surface of the seal element using adhesives. Its main purpose is to absorb any electrical interference that may be present in the surrounding environment and by shielding the connection.

Gaskets are a type of insulation that is used to provide a secure and reliable seal between two or more components. They are available in a variety of materials such as Polytetrafluoroethylene (PTFE), EPDM, and Neoprene and are designed for use in a variety of temperature and pressure conditions. Gaskets are often used to create a strong seal that prevents the transmission of electromagnetic and radio frequency interference. In order to be effective, gasket material must have the correct thickness and be installed correctly in the application.

RFI/EMI products such as contacts, fingerstock, and gaskets are essential components of many electronic and communication systems, as they protect communication devices from interference while allowing reliable data transmission. By properly selecting, installing, and maintaining these components, one can realize improved performance and reliability in applications that otherwise may be disrupted by external influences.

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