EMI Shielding Accessories: Backshells, Tubular Braid, Shorting Plugs and Other EMI Noise Suppression Devices

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EMI Shielding Accessories: Backshells, Tubular Braid, Shorting Plugs and Other EMI Noise Suppression Devices Because the Art of EMI Management Usually Calls for More Technology Than Just a Filtered Connector

Backshells: A Part of Every Well-Designed EMI Management Solution
Effective shielding of avionic devices must anticipate both "radiated susceptibility" (the degree to which outside interference affects the reliable functioning of equipment) and "radiated emissions" (the extent to which the device itself creates electromagnetic waves which can affect its function). In both cases, the techniques for managing the interference include reflecting the signals outright, reducing entry points in equipment and cable shields, absorbing the interference in permeable material and dissipating it as heat, or conducting the EMI along the skin of the device/cable and taking it to ground.

In practical terms, EMI management is accomplished by plating the skins of cases and cable shields, building up the density (thickness) of shield material, or eliminating line-of-sight entry points through which electromagnetic waves can penetrate or escape.

In interconnect applications, wires and cables are typically shielded by placing a conductive material between the cable conductor and its outer jacket, or by covering individual conductors within a cable with shielding material. Again, the purpose of such shielding is to either capture the EMI and take it to ground or to dissipate the interfering signal as heat. Shields must also be effectively terminated to the connector backshell lest radiation enter the system at the backshell/connector/shield interface and defeat the purpose of the shield.

Glenair understands that the management of EMI usually includes technology above and beyond a filterd connector. We offer thousands of EMI management products, and we've organized a small selection of some of the most practical devices here for use in conjunction with filtered connector products.

Product Features
Table I: Backshell Interface Dimensions
The BAND-IT® Clamping System EMI Shield Termination Instructions

600-058 and 600-060
600_058 The BAND-IT® Clamping System, Hand Banding Tools

600-052, 600-057, 600-090 and 600-083
600_052 The BAND-IT® Clamping System, Clamping Bands

440-075
440_075 EMI/RFI Banding Adapter, Self-Locking Rotatable Coupling - Standard Profile

319-065
319_065 Self-Locking Rotatable Coupling Composite Swing-Arm Strain Relief with DuPont™ Aracon® EMI/RFI Shield Sock & Optional Split Ring

319-064
319_064 Self-Locking Rotatable Coupling Composite Swing-Arm Strain Relief with Nickel/Copper EMI/RFI Shield Sock & Optional Split Ring

687-207
687_207 Composite MIL-C-85049/93 Banding Split-Ring

103-009
103_009 Aracon® Tubular Fiber Braid (Grey) for EMI Shielding Applications

100-001
100_001 Tubular Metal Braid QQ-B-575B ASTM B33, Tin Coated Copper for EMI Shielding Application

100-003
100_003 Tubular Metal Braid ASTM B355 Class 4 OFHC, Nickel Plated Copper for EMI Shielding Application

380-107
380_107 EMI/RFI Non-Environmental Backshell with Strain Relief Type D - Self-Locking - Rotatable Coupling - Split Shell

930-001
930_001 Conductive Gasket for Flange Mount Receptacle Connector

177-710 (Untwisted) and 177-740 (Twisted)
177_710 Micro-D Shielded Cable Assemblies

249-001
249_001 Conductive O-Ring for Jam Nut Receptacles

DuPont™ and Aracon© are trademarks or registered trademarks of E.I. Du Pont de Nemours and Company.

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