EMI Shielding banner

Electromagnetic Shielding

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

Both EMI and RFI cause similar effects, although EMI typically operates on lower frequencies than RFI. Read More…

Electromagnetic Shielding Electromagnetic shielding is a barrier which protects electronic equipment from ambient electromagnetic interference. Electromagnetic interference, or EMI, is the magnetic field which is created by electrical currents; EMI can travel along wires, electrical circuits and conductors, while radio frequency interference (RFI) is radiated electromagnetic noise, which travels through the air as radio waves.
Request for Quote

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.

Request A Quote

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 and elastomers.

Request A Quote

Sealing Devices Inc. $$$

Quakertown, PA  |  215-703-0950

At View Thru Technologies, we provide a comprehensive line of shielded filters. Our EMI shielding products are designed to meet any shielding requirements ranging from low-level anti-static applications to Level 1 TEMPEST applications. We use our own printed copper mesh, as well as various conductive coatings to ensure your shielding requirements are met.

Request A Quote

View Thru Technologies, 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.

Request A Quote

VTI Vacuum Technologies Inc. $$$

Pleasanton, CA  |  925-461-8830

Peridot Corporation is a precision manufacturer of RFI and EMI shielding for a multitude of industries, including medical, telecommunications, computer, electronics, automotive and aerospace. We offer a vast array of manufacturing technologies, all under one roof, to ensure optimum shielding solutions.

Request A Quote

Peridot Corporation $$$
placeholder image Spira Manufacturing Corporation Sealing Devices Inc. View Thru Technologies, Inc. VTI Vacuum Technologies Inc. Peridot Corporation

EMI enclosures, EMI coating, EMI gaskets and EMI filters are used as magnetic shielding to guard sensitive electronic equipment. EMI and RFI are created, by widely varying degrees, by everything which conducts electrical energy, including electrical wires, electrical appliances, computers and all electronic equipment. Signal-bearing electronic devices such as mobile phones give off RFI.

Normal electrical currents are disrupted when moderate to high levels of EMI or RFI are introduced; un-channeled electromagnetic signals and radio frequency waves can act as "noise", magnetically altering normal flow of electrical currents and impeding the flow of electrical energy.

Electromagnetic shielding and EMI filters can be found in medical devices, computers, mobile phones, stereo systems, television sets, windows, vents, fabrics, foils and even walls.

Shielding sensitive electronic equipment from electromagnetic interference and shielding high EMI-emitting equipment from contaminating other equipment can be achieved by enclosing equipment in a conductive EMI absorbing material or by coating equipment or equipment enclosures with EMI coating.

Thus, electromagnetic shielding can be accomplished through evident physical objects, or through unapparent objects. Electromagnetic shields are also called magnetic shields, EMF shields or RFI/RF shields and may be made from conductive rubber, like nitrile or silicone, or metals with high magnetic permeability.

Metals such as nickel, copper, steel and aluminum are commonly used, although the industry standard magnetic shielding material is Mu-Metal®, an alloy of nickel, iron, copper and molybdenum.

Many industries depend on EMI shielding products to protect communication systems, in industries such as medical, telecommunication, stage production, sound production and many others.

Within circuit boards and CPUs, most problematic EMI comes from electromagnetic cross-talk between different components on the same board as EMI travels across wires and conductive materials.

Electromagnetic Shielding Informational Video