51H EMI Gaskets
Fabric-over-Foam
Innovative Innovative TTechnologyechnology
for a for a Connected Connected WorldWorld
UL 94V0 RATED NI/CU POLYESTER TAFFETA FABRIC-OVER-FOAM
Laird Technologies Fabric-over-foam (FoF) 51H EMI gaskets provide excellent EMI shielding
performance for customers where EMI issues occur. The 51H series EMI gaskets are composed
of electrically conductive fabric wrapped around a soft urethane foam core. They are supplied with
either a conductive or non-conductive pressure sensitive adhesive (PSA), and can be equipped with
an Extended Release Liner (ERL) on the adhesive. The 51H is a halogen-free, UL 94V0 rated product
that can be created with cross-section profiles such as rectangle, D, C, P, T, knife, bell shapes, and
others. The 51H EMI gaskets can be further customized to an application by die-cutting,
hole punching, notching, etc.
FEATURES MARKETS
Fabric-over-Foam gaskets are RoHS compliant Cabinet applications
Halogen-free per IEC-61249-2-21 standard LCD and Plasma TV
UL 94V0 Medical equipment
Low surface resistivity of < 0.07 / Servers
provides excellent conductivity
Printers
Shielding effectiveness of >100 dB across a
Laptop computers
wide spectrum of frequencies
Networking equipment
Extremely low compression forces allow for
Desktop computers
use of lighter materials
Telecommunications cabinets
Fabric is highly conductive to provide good
EMI shielding and grounding
FORCE/DISPLACEMENT/RESISTANCE (FDR)
Abrasion resistant metallized fabrics
8
0.5
show virtually no degradation in electrical
0.45
7
performance after 1,000,000 cycles
0.4
6
0.35
Laird Technologies proprietary coating
5
0.3
prevents fabric fraying and fingerprinting
0.25 4
Available with conductive or
0.2
3
non-conductive PSA
0.15
2
0.1
Many cross-section profiles available such as
1
0.05
rectangle, D, C, P, T, knife, bell and more
0
0
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Profile gaskets can be cut to specified lengths,
% Compression
kiss-cut on release liner, or mitered to form
frame configurations
SHIELDING EFFECTIVENESS (dB)
140
120
100
80
60
40
20
global solutions: local support
TM 0
1.00E+04 1.00E+05 1.00E+06 1.00E+07 1.00E+08 1.00E+09
USA: +1.866.928.8181
Frequency Hz
Europe: +49.0.8031.2460.0
Asia: +86.755.2714.1166
www.lairdtech.com
Effectiveness (dB)
Resistance (ohms/inch length)
Force (lbs/inch length)51H EMI Gaskets
Fabric-over-Foam
Innovative Technology
for a Connected World
Item Unit Value Test Method
Shielding Effectiveness
at 100 MHz 108 SAE-ARP-1705(Mod.)
at 1 GHz dB 110 (W10 mm x H8 mm)
Surface Resistivity / < 0.07 ASTM F390
Compression Set % < 20 ASTM D3574
Operation Temperature C -40 ~ 70 -
Flame Retardant UL 94V0 (UL file No.E170327)
Hazardous Substance Compliant with RoHS (Directive 2011/65/EU)
Compliant with SONY ss-00259
Halogen-free (based on IEC-61249-2-21)
Antimony-free
Shelf Life 12 months at 23C/ 60% R.H.
COMPOSITION OF PRODUCT
W
Conductive fabric
Polyurethane foam
H
PSA tape (option)
PRESSURE SENSITIVE ADHESIVE (PSA TAPE) OPTIONS
Name Type Thickness (mm) Peel strength on stainless steel Z-axis Resistance
(JIS Z 0237)
LT-301 Conductive PSA 0.09 > 1.3 kgf/25 mm < 0.05
LT-350 PSA 0.12 > 2 kgf/25 mm -
*Other PSA can be provided. Contact Laird Technologies engineering.
ORDERING INFORMATION
PART NUMBER EXAMPLE
Digits: 1 2 3 4 5 6 7 8 9 10 11 12 13 14
5 1 H
4 2 1 6 A A - - 0 1 4 0 0
Product
Profile S hape & Details Part L ength
Name
EMI-DS-FOF-51H 0712
Any information furnished by Laird Technologies, Inc. and its agents is believed to be accurate and reliable. All specifications are subject to change without notice. Responsibility for the use and application of
Laird Technologies materials rests with the end user. Laird Technologies makes no warranties as to the fitness, merchantability, suitability or non-infringement of any Laird Technologies materials or products for
any specific or general uses. Laird Technologies shall not be liable for incidental or consequential damages of any kind. All Laird Technologies products are sold pursuant to the Laird Technologies Terms and
Conditions of sale in effect from time to time, a copy of which will be furnished upon request. Copyright 2012 Laird Technologies, Inc. All Rights Reserved. Laird, Laird Technologies, the Laird Technologies
Logo, and other marks are trade marks or registered trade marks of Laird Technologies, Inc. or an affiliate company thereof. Other product or service names may be the property of third parties. Nothing herein
provides a license under any Laird Technologies or any third party intellectual property rights.