CHO-JAC® Flat Cable EMI Shield
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Seals • Cable shielding products • EMI/ESD shielding laminates • Shielded vents and windows • Commercial and military EMI testing LEADER IN EMI SHIELDING INNOVATION, DESIGN, AND TEST TECHNOLOGY 73 CHO-JAC® Flat Cable EMI Shield CHO-JAC® shielding is a high quality flat cable jacket designed to attenuate RF signals and bring digital electronic devices into compliance with FCC and TEMPEST radiated emissions limits as well as European Union and MIL-STD radiated emissions and susceptibility limits. Two standard designs permit specification of a foil/film combination which meets your shielding requirements. For moderate performance and lower cost, CJ-021 aluminum/polyester is offered. For greater shielding effectiveness, select CJ-022, constructed of copper/ polyester. Alternate foils, films and colors are available on a custom basis. FEATURES n Designed with a 360° foil shield with bonded metal overlap. Provides the maximum EMI shielding when properly sealed and terminated. n Sizes to fit cables with 10, 16, 20, 26, 34, 40, 50, 60 or 64 conductors. n Meets flame retardancy requirements of UL rating 94V-0. n Wires simplify folding and provide crack resistance. n Very flexible, easing cable routing during assembly. Light weight. n Pressure-sensitive adhesive eliiminates heat-sealing irons and zippers. CJ-021 and CJ-022 deliver effective EMI shielding performance at an attractive cost. The jacket is designed with a 360° aluminum or copper shield bonded to a polyester layer which resists scuff, wear and tear. Metal-to-metal contact is established as the jacket wrap is completed. Integral wires simplify folding and termination. Cable routing during assembly is facilitated by the jacket's flexibility, and its light weight eases strain relief requirements. Low impedance termination is accomplished by folding back the shield at the ends, and mechanically attaching the foil to a ground on the chassis. Both ends of the cable should be at the same ground potential. SELECTION CHART CHO-JAC Shielding Corrosion Relative Temperature Chemical Flame Abrasion/Tear Dielectric Type Effectiveness Flexibility Resistance Weight Resistance Resistance Retardancy Resistance Strength CJ 021 Good Excellent Fair Lightest Good Good Non Flam Good Good Nonconductive Pressure-Sensitive Adhesive 0.001" (90.025mm) Polyester Wire* Folding Points Cable Width 0.0014" (0.04mm) Copper Foil or 0.002" (0.5mm) Aluminum Foil Exposed Foil Overlap for 360° Shielding *Wires are not recommended for termination above 50 MHz.

TECHNICAL DATA Property Test Method Typical Values CJ-021 CJ-022 Grade – Commercial Commercial Foil Type – Aluminum Copper Foil Thickness (mils) – 2.0 1.4 Film Type – Polyester Polyester Film Thickness (mils) – 1.0 1.0 Total Thickness (mils) ASTM-D1000 4.0 3.5 Flexibility IPC-TM-650 Pass Pass Method 2.4.5 Tear Strength (lbs.) ASTM-D1004 2.5 2.5 Adhesion of: Foil to insulator (lbs./in.) – 4.0 4.0 Sealing adhesive (lbs./in.) – 2.5 2.5 Shielding Effectiveness Contact Chomerics See Graphs for details Dielectric Strength (kV) ASTM-D149 4.5 4.5 Maximum Continuous Temp. °F (°C) – 221 (105) 221...