51H EMI Gaskets
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.
UL 94V0 RATED NI/CU POLYESTER TAFFETA FABRIC-OVER-FOAM
FEATURES
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Fabric-over-Foam gaskets are RoHS compliant
Halogen-free per IEC-61249-2-21 standard
UL 94V0
L
ow surface resistivity of < 0.07 Ω /
□
provides excellent conductivity
S
hielding effectiveness of >100 dB across a wide
spectrum of frequencies
E
xtremely low compression forces allow for use
of lighter materials
F
abric is highly conductive to provide good EMI
shielding and grounding
Abrasion resistant metallized fabrics
show virtually no degradation in electrical
performance after 1,000,000 cycles
L
aird Technologies’ proprietary coating prevents
fabric fraying and fingerprinting
A
vailable with conductive or
non-conductive PSA
M
any cross-section profiles available such as
rectangle, D, C, P, T, knife, bell and more
P
rofile gaskets can be cut to specified lengths,
kiss-cut on release liner, or mitered to form
frame configurations
MARKETS
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Cabinet applications
LCD and Plasma TV
Medical equipment
Servers
Printers
Laptop computers
Networking equipment
Desktop computers
Telecommunications cabinets
FORCE/DISPLACEMENT/RESISTANCE (FDR)
0.5
Resistance (ohms/inch length)
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
0%
10%
20%
30%
40%
50%
60%
70%
80%
% Compression
8
7
Force (lbs/inch length)
6
5
4
3
2
1
0
90% 100%
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SHIELDING EFFECTIVENESS (dB)
140
120
Effectiveness (dB)
100
80
60
40
20
0
USA: +1.866.928.8181
Europe: +49.0.8031.2460.0
Asia: +86.755.2714.1166
1.00E+04
1.00E+05
1.00E+06
1.00E+07
1.00E+08
1.00E+09
Frequency Hz
www.lairdtech.com
51H EMI Gaskets
Fabric-over-Foam
Test Method
SAE-ARP-1705(Mod.)
(W10 mm x H8 mm)
ASTM F390
ASTM D3574
-
Item
Shielding Effectiveness
at 100 MHz
at 1 GHz
Surface Resistivity
Compression Set
Operation Temperature
Flame Retardant
Hazardous Substance
Unit
Value
108
dB
Ω /□
%
°C
110
< 0.07
< 20
-40 ~ 70
UL 94V0 (UL file No.E170327,
Designation V0 041)
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 23°C/ 60% R.H.
COMPOSITION OF PRODUCT
W
Conductive fabric
H
Polyurethane foam
PSA tape (option)
PRESSURE SENSITIVE ADHESIVE (PSA TAPE) OPTIONS
Name
LT-301
LT-350
Type
Conductive PSA
PSA
Thickness (mm) Peel strength on stainless
steel (JIS Z 0237)
0.09
0.12
> 1.3 kgf/25 mm
> 2 kgf/25 mm
Z-axis Resistance
< 0.05 Ω
-
*Other PSA can be provided. Contact Laird Technologies engineering.
Values presented have been determined by standard test methods and are typical values not to be used
for specification purposes.
ORDERING INFORMATION
PART NUMBER EXAMPLE
Digits:
1
4
2
2
3
1
4
6
5
A
6
A
-
7
5
8
1
Product
Name
9
H
-
10
0
11
1
12
4
13
0
14
0
Profile S hape & Details
Part L ength
EMI-DS-FOF-51H
062615
Any information furnished by Laird 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 materials rests with the end user, since Laird and its agents cannot be aware of all potential uses. Laird makes no warranties as to the fit-
ness, merchantability or suitability of any Laird materials or products for any specific or general uses. Laird, Laird Technologies, Inc or any of its affiliates or agents shall
not be liable for incidental or consequential damages of any kind. All Laird 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 2015 Laird Technologies, Inc. All Rights Reserved. Laird, Laird Technologies, the Laird
Logo, and other marks are trademarks or registered trademarks 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 or any third party intellectual property rights.
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