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. $$$

Easton, PA  |  610-829-5000

Orbel's design and manufacturing process enables unique engineered solutions for a variety of applications. Orbel offers today's most effective EMI/RFI shielding, photo-etched precision metal parts, precision metal stampings, and electroplated metal foils. Areas of specialization include aerospace, telecommunications, electronics, medical, automotive, and manufacturing. Orbel is ISO 9001-2008 and AS 9001-C Certified. For more information, visit Orbel.com or call 610-829-5000.

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Orbel Corporation $$$

Canandaigua, NY  |  888-599-6113

Select Fabricators, Inc. manufactures flexible packaging, cleanroom assemblies, and portable EMI shielding enclosures as well as contract product assembly and fulfillment for aerospace, medical, death care and industrial customers.

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Select Fabricators, Inc. $$$

Bethlehem, PA  |  800-576-7325

Seal Science, Inc. (SSI) is an industry leader in design engineering and precision manufacturing of materials and components for critical sealing applications and advanced technology systems. SSI provides cutting edge technological solutions for mechanical and electrical systems; including structural subsystem design, signature management and electromechanical interference (EMI) shielding products. Contact us for more information!

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Seal Science, Inc. $$$

Passaic, NJ  |  973-928-8300

We are space-qualified. Located in Passaic, New Jersey, we cater to the needs of numerous technology intensive industries including the US Government and its’ contractors. MWT Materials (and our predecessor, Millimeter Wave Technology) has been active in the research, development, analysis, and manufacture of radar absorbing materials and coatings (RAM) since the early 1980’s.

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MWT Materials Inc. $$$
placeholder image Spira Manufacturing Corporation Sealing Devices Inc. Orbel Corporation Select Fabricators, Inc. Seal Science, Inc. MWT Materials 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