A Shield Selection Guide

Your specific application will help point you
in the right direction

Electromagnetic interference (EMI) can be a major problem in the design and operation of electrical and electronic equipment. EMI can wreak havoc with instruments, control systems, data processing equipment, or communications networks. For 60 years, Magnetic Shield Corporation has developed extremely successful, practical solutions to the problem of electromagnetic interference, through proprietary alloys in a convenient range of thicknesses and forms. Here are some basic facts and figures to help you understand our products and services. better.

NETIC or CO-NETIC AA?

Through years of in-depth research and development, Magnetic Shield Corporation has perfected two proprietary alloys developed specifically to provide effective magnetic shielding. They are called CO-NETIC AA and NETIC.

In fields of low intensity, CO-NETIC AA is used in order to utilize its high initial permeability and correspondingly high attenuation characteristics. In fields of high intensity, NETIC is preferred because of its high magnetic saturation characteristics. In some applications, combinations of the two materials may be useful, with NETIC material always placed closer to the source of magnetic interference.

FOIL or SHEET?

CO-NETIC AA and NETIC alloys are available in either foil or sheet form.

Foils, supplied in thicknesses ranging from .002 to .010 inches (0.051 to 0.254 mm) provide effective shielding with minimum fabrication, avoiding expensive tooling and extended deliveries. Foil is the preferred material for many production, prototype and laboratory evaluation projects.

Typical applications include shielding field-sensitive components, printed circuit boards, instruments, signal leads and power cables.
Sheet materials, supplied in thicknesses ranging from .014 to .062 inches (0.356 to 1.58 mm) offer additional shielding. Typical uses include applications, which require production tooling. Our exclusive perfection annealed sheet is ready for use as a magnetic shield without further annealing.

ANNEALING

For optimum magnetic properties, NETIC and CO-NETIC AA material is annealed, a process by which the alloy is heated to a high temperature and then allowed to cool. Annealing significantly improves the material's attenuation - its ability to absorb and redirect magnetic fields. There are two stages of annealing: stress annealing followed by perfection annealing.

Magnetic Shield Corporation