Premier Distributor of Parker O-Rings, Parker Seals and Parker Products
Premier Distributor of Parker O-Rings, Parker Seals and Parker Products
Conductive Grounding Tabs (SOFT-SHIELD®, SPRING-LINE™)
Adequate EMI protection often can be achieved by establishing low impedance ground paths between electrically conductive elements in the chassis and components.
Electromagnetic interference (EMI) is frequently induced by surface currents exciting metal components to create “phantom” fields. As a generality, all metal elements should be bonded to a common ground. In some cases, conductive “tabs” provide the required grounding paths at lower costs than modifying a design or installing enclosure shielding. For example, slot length in enclosure seams can be reduced effectively using conductive tabs at appropriate intervals. With wavelength the determining factor, the smaller slot size may limit leakage sufficiently to circumvent continuous gasketing. This will provide a cost savings. Within enclosures, grounding tabs may reduce radiated EMI levels from a PCB ground plane saturated with signals. Board-mounted component shields, such as metal cans, can be grounded with conductive tabs inserted between the shield and enclosure wall.
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SOFT-SHIELD 5000 Series Foam |
SOFT-SHIELD 4000
Series Foam |
SOFT-SHIELD 2000
Series Foam |
SPRING-LINE
Springfingers |
CHO-SEAL & CHO-SIL
Conductive Elastomers |
|
Rectangular, D, V, C, P and other
profiles |
Flat/Rectangular,
die-cut shapes |
Rectangular, D
Profiles |
Various
Profiles |
Solid and hollow O, D,
P, Rectangular Profiles |
|
Custom Profiles
|
Custom Profiles
|
Custom Profiles
|
Custom Profiles
|
Custom Profiles
|
|
Nickel-plated silver
nylon ripstop fabric over urethane |
Fabric-reinforced
Aluminum foil over urethane |
Silver-plated
yarn over thermo- plastic EPDM foam |
Beryllium-
Copper |
Conductive particle
filled silicone or flurosilicone extrusion |
|
Non-Conductive
PSA Attachment |
Conductive
PSA Attachment |
Non-Conductive
PSA Attachment |
Non-Conductive
PSA Attachment |
Non-Conductive
PSA Attachment |
|
Continuous Lengths |
Continuous Lengths
Kiss-cut, Tape Kiss-cut, Film Sheet Cut-to-Length |
Continuous Lengths
--- --- Cut-to-Length |
Continuous Lengths
Kiss-cut, Tape Kiss-cut, Film Sheet Cut-to-Length |
Continuous Lengths
Kiss-cut, Tape Kiss-cut, Film Sheet Cut-to-Length |
|
High
Grounding Effectiveness |
High
Grounding Effectiveness |
Moderate
Grounding Effectiveness |
Highest
Grounding Effectiveness |
High
Grounding Effectiveness |
| SOFT-SHIELD® 5000 Series Conductive Fabric-Wrapped Foam Nickel-plated silver imparts conductivity to the self-terminating, nylon rip-stop jacket of this highly compressible foam gasket. Closure force of <1 lb/inch (0.175 N/mm) makes it ideal for use in laptop computers and portable telecommunications devices. Dozens of standard configurations include rectangular, D, C, P and V profiles. Standard sizes start as small as a 0.060 x 0.150 inch (1.5 x 3.8 mm) solid D profile, and all offer optional pressure-sensitive adhesive. Choose general-duty or UL 94V-0 rated versions. Pre-cut lengths as small as 0.25 inch (6.35 mm) minimize waste. Parts are kiss-cut on polyester film release backers. Top |
| SOFT-SHIELD® 4000 Series Foil/Fabric Wrapped Foam Closed cell urethane foam is machine-wrapped in fabric-reinforced aluminum foil, with conductive pressure-sensitive adhesive on one side for mounting. Low compression set, excellent conductivity and durability make these materials cost-effective as grounding pads. Choices include UL 94V-0 or 94HB- rated compositions and three grades of softness. Numerous standard thicknesses range from 0.048 to 0.279 inch (1.2 to 7.1 mm), up to 6.0 inches (152 mm) wide. For rapid peel and stick applications, kiss-cut parts are supplied on polyester film release sheets. Custom die-cutting is also available. Top |
| SOFT-SHIELD® 2000 Series Conductive Yarn over Foam This configuration features silver-plated nylon yarn knitted over highly compressible, thermoplastic EPDM foam and securely bonded to the core. Secondary termination is not required, and closure force is <1 lb/inch (0.175 N/mm). Ten standard D and rectangular profiles range from 0.140 x 0.100 inch (3.56 x 2.54 mm) to 0.500 x 0.375 inch (12.70 x 9.53 mm), with pressure-sensitive adhesive standard. Pre-cut pieces can be supplied for rapid application. Top |
| SPRING-LINE ®"Pick and Stick" Springfingers Highly resilient, 0.002 inch (0.051 mm) thin fingers compress under low closure force. Their tin-plated beryllium copper construction provides excellent conductivity and galvanic corrosion resistance. In a typical application, springfinger tabs affixed to metal cans soldered over board components establish contact between adjacent PCBs, simplifying grounding to the housing. Tight compression does not affect resilience or electrical performance. Parts include high-tack pressure-sensitive adhesive on the mounting surface, and are supplied in strips for snap-off application, as individual pieces, or spaced on film reels for “pick-and-stick” application. Top |
| CHO-SEAL® and CHO-SIL® Conductive Elastomer "Peel and Stick" Tabs With many standard sizes and material choices, conductive elastomer extrusions afford real design flexibility for grounding applications when supplied kiss-cut on PSA mounting tape. Hollow D profiles, available as small as 0.125 (3.18 mm) wide, are typically chosen, but others may be used, including custom profiles. Cost and performance options include a choice of conductive particle fillers in silicone or fluorosilicone binders. All offer excellent resistance to compression set over a wide temperature range. Grounding tabs can also be produced using molding techniques that accommodate special design features or geometries. Top |
