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RFI and EMI - Contacts, Fingerstock and Gaskets

Radio frequency interference (RFI) and electromagnetic interference (EMI) are two of the most common causes of electrical system reliability problems due to their effects on electrical equipment. To ensure proper operation, engineers must use the right combination of contacts, fingerstock and gaskets to minimize the effects of these interferences. Understanding the application field and working principle of these components can help engineers to effectively address RFI and EMI.

Contacts

Contacts are small metal plates that are used to complete electrical connections between two circuits. They come in a variety of shapes, sizes, and materials, but are usually made of aluminum, copper, brass, or a combination of the three. Depending on the application, contacts may be insulated, plated, or bare. Contacts can be used in a variety of electrical components, including relays, switches, and circuit breakers. In terms of RFI and EMI protection, contacts are most effective when used in enclosures or shielded metal boxes. In this case, they provide a barrier to electrical interference that travels through the air.

Fingerstock

Fingerstock, also known as ground springs, is a type of material commonly used in electrical equipment. It is made from copper, brass, or stainless steel and has a high level of electrical conductivity. Fingerstock is usually used to create an electrical connection between two surfaces by providing a medium for a conductive path. In terms of RFI and EMI, fingerstock can help to effectively reduce levels of interference by providing a physical barrier to prevent radiation from entering the equipment. However, it is important to note that the thickness and density of the fingerstock will affect its ability to provide effective protection.

Gaskets

Gaskets are materials used to seal openings or joints between two surfaces. They are usually made from rubber, foam, plastic, or metal and come in a variety of shapes and sizes. In terms of RFI and EMI, gaskets act as a barrier to the electromagnetic fields that can cause interference. Gaskets also help to reduce vibration, humidity, and dust, all of which can have an impact on electrical system reliability. However, the type of material used for the gasket must be chosen carefully to ensure that it provides adequate protection.

Conclusion

RFI and EMI can have serious implications for electrical system reliability, but understanding the application field and working principles of contacts, fingerstock, and gaskets can help engineers to effectively address these issues. By properly selecting and combining these components, engineers can ensure that their electrical equipment is protected from the harmful effects of these interferences.

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