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RFI and EMI - Contacts, Fingerstock and Gaskets

Contact structures are the items used to make electrical connections in a variety of applications, from large-scale wiring harnesses down to circuits that require the utmost in precision contact manufacture. Examples of contact structures include fingerstock, contacts, and gaskets.

0097054217 Application Field and Working Principle

0017054217 contact structures, composed of conductive material, are used in a variety of applications and have a wide range of uses, such as wiring circuits in computer components, signals interconnections, light fixtures, relays, motors, and actuators. Contacts are also used in the automotive and aerospace industries, and in industrial control circuit applications.

The materials used to make contacts are typically either carbon steel, brass, or beryllium copper alloys. Each material has its own unique properties and benefits which will decide the exact composition of the contact. For instance, brass contacts are usually used for applications requiring a low current while carbon steel contacts are employed for heavier-duty electrical connections. Beryllium copper contacts can provide superior electrical conductivity.

Contacts are essentially pieces of conductive material with a shape that is designed to make contact with a mating piece. This is done either directly by pressing the contacts together or indirectly using springs or other means. Contacts that are pressed together, or kept in contact by springs, are often referred to as “fingerstock” contacts. Fingerstock contacts feature a variety of designs and are employed in a host of electrical applications.

Gaskets are used primarily to prevent electrical connections from deteriorating due to the buildup of dirt or dust. Gaskets are typically made from rubber or other resilient materials, and can be contoured to fit the shape of the contact clearly and precisely. Gaskets serve to seal components in place, thereby ensuring that dirt and dust are unable to buildup and subsequently interfere with the electrical connection.

In order to prevent any unwanted interference from Radio Frequency Interference (RFI) or Electro Magnetic Interference (EMI), contacts and gaskets can be coated or plated with material that will screen out the interference. Such materials can range from aluminum, copper, or tin to specialized metals like nickel or gold.

While the installation of contacts and gaskets requires the utmost in precision, the selection of the right contact, gasket, and plating materials for each application can mean the difference between success and failure. Knowing the exact requirements of a specific application can help ensure that the most cost-effective and reliable contact structure is used.

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