EMI/RFI Shielding

A reliable source for EMI Shielding information and leading EMI Shielding Companies & Manufacturers.

These EMI and RFI currents are generated from a broad range of sources, including car ignition systems, cell phones, thunder storms, the Sun, and the northern lights. These waves commonly affect AM/FM radios, cell phones and televisions. Read More…

EMI/RFI Shielding Electromagnetic interference (EMI), also known as radio frequency interference (RFI) can be extremely disruptive to electronic devices. To reduce the complications in electronics due to this interference, shielding is used to effectively absorb these waves. EMI can degrade or stop the performance of a circuit, rendering an instrument completely useless.

Leading Manufacturers

San Fernando, CA  |  818-764-8222

Spira Manufacturing Corp. offers the most reliable EMI gaskets & shielding for the electrical / electronic industries to meet required EMC/EMI shielding regulations. We have been providing reliable, cost-effective EMI & RFI shielding solutions for over 30 years, and to this day we continue to provide EMI products with innovation & expertise. Spira is an AS9100 and ISO 9001:2008 certified company.

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Spira Manufacturing Corporation $$$

Lancaster, NY  |  716-684-7600

Sealing Devices is a leading North American distributor and fabricator of EMI shielding products, including conductive elastomers, Soft-Shield® low closure force gasketing, windows, conductive adhesives, formed-in-place parts, vents as well as elastomers, pads and tapes used for managing related thermal applications. The company is ISO 9001:2008 registered.

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Sealing Devices Inc. $$$

Roseville, MI  |  800-345-0568

Microphoto is a manufacturer, distributor and service center for a multitude of industries. Industries served include medical, computer, decorative, electronic, aerospace and automotive. Services include EMI shielding, RFI shielding and electromagnetic interference shielding.

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Microphoto, Inc. $$$

Reedsburg, WI  |  800-482-1941

VTI Vacuum Technologies, Inc. supplies EMI/RFI/ESD shielding and form-in-place gasketing solutions for medical, defense, aerospace and industrial devices. VTI utilizes a vacuum deposition process for selectively shielding plastic electronic enclosures. The company robotically dispenses conductive and environmental form-in-place gaskets for sealing plastic and metal components. VTI is ISO 9001:2008 certified, ITAR compliant and veteran owned small business established in 1993.

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VTI Vacuum Technologies Inc. $$$

Tampa, FL  |  866-832-4364

Providing industries with quality coating services and electronic shielding products, Leader Tech has a variety of capabilities: EMI shielding and EMI gaskets, plus other EMI/RFI shielding products and services. Call us today for all of your shielded assemblies and shielded gasket needs.

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Leader Tech, Inc. $$$
placeholder image Spira Manufacturing Corporation Sealing Devices Inc. Microphoto, Inc. VTI Vacuum Technologies Inc. Leader Tech, Inc.

There are two distinct types of electromagnetic interference that produce two different effects. The first type is known as "narrowband" EMI or RFI. Narrowband interference is generated from transmissions like radio and TV stations or cell phone signals.

Sheet of Lightning Strike Protection Material Sheet of Lightning Strike Protection Material - Dexmet Corporation

"Broadband" interference is the second type of interference, and this type of interference is unintentionally generated from electric power transmission lines and other similar electrical systems.

EMI shields are built using magnetic alloys that are highly permeable. These materials are usually built in a closed container around the device that they are protecting. Rather than block the interfering waves, these magnetic metals absorb them so that they do not pass on to the device. The shield is usually layered to exponentially diminish the force of the electromagnetic waves.

EFI/RFI interference poses a potential problem for essentially any industry, so shielding solutions need to be integrated in order to prevent these problems. Sometimes this shielding is applied in the form of a spray. This acrylic based product can be sprayed onto plastic electronic housings. Nickel, silver and copper particles blended into the spray help to reduce or entirely eliminate interference. These types of coatings can also be purchased in brush paint form.

In medical settings like hospitals and clinics, EMI/RFI shielding must be used to prevent equipment from being interfered with by nearby devices like cell phones. The FDA sets and regulates standards for the shielding of equipment to safeguard against malfunctions in critical medical situations where an equipment malfunction could be fatal to a patient being treated.

With spray and paint solutions, EMI/RFI shielding is becoming easier to apply than ever before, slowly eliminating the complications related to electromagnetic interference.

EMI/RFI Shielding Informational Video