51H EMI Gaskets
Fabric-over-Foam
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
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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
8
0.45
7
0.4
6
0.35
0.3
5
0.25
4
0.2
3
0.15
2
0.1
1
0.05
0
0%
10%
20%
30%
40%
50%
60%
70%
80%
0
90% 100%
% Compression
SHIELDING EFFECTIVENESS (dB)
140
Effectiveness (dB)
120
100
80
60
40
20
0
USA: +1.866.928.8181
Europe: +49.0.8031.2460.0
Asia: +86.755.2714.1166
www.lairdtech.com
1.00E+04
1.00E+05
1.00E+06
1.00E+07
Frequency Hz
1.00E+08
1.00E+09
Force (lbs/inch length)
•
Resistance (ohms/inch length)
•
Fabric-over-Foam gaskets are RoHS compliant
Halogen-free per IEC-61249-2-21 standard
UL 94V0
Low surface resistivity of < 0.07 Ω / □
provides excellent conductivity
Shielding effectiveness of >100 dB across a wide
spectrum of frequencies
Extremely low compression forces allow for use
of lighter materials
Fabric 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
Laird Technologies’ proprietary coating prevents
fabric fraying and fingerprinting
Available with conductive or
non-conductive PSA
Many cross-section profiles available such as
rectangle, D, C, P, T, knife, bell and more
Profile gaskets can be cut to specified lengths,
kiss-cut on release liner, or mitered to form
frame configurations
51H EMI Gaskets
Fabric-over-Foam
Item
Unit
Value
Test Method
108
SAE-ARP-1705(Mod.)
Shielding Effectiveness
at 100 MHz
dB
110
(W10 mm x H8 mm)
Surface Resistivity
at 1 GHz
Ω /□
< 0.07
ASTM F390
Compression Set
%
< 20
ASTM D3574
°C
-40 ~ 70
-
Operation Temperature
Flame Retardant
UL 94V0 (UL file No.E170327, Designation V0 041)
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 23°C/ 60% R.H.
COMPOSITION OF PRODUCT
W
Conductive fabric
H
Polyurethane foam
PSA tape (option)
PRESSURE SENSITIVE ADHESIVE (PSA TAPE) OPTIONS
Name
Type
Thickness (mm) Peel strength on stainless
steel (JIS Z 0237)
Z-axis Resistance
LT-301
Conductive PSA
0.09
> 1.3 kgf/25 mm
< 0.05 Ω
LT-350
PSA
0.12
> 2 kgf/25 mm
-
*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
Profile S hape & Details
6
A
-
7
5
8
1
Product
Name
9
H
-
10
0
11
1
12
4
13
0
14
0
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 fitness, 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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