TechSIL
CONDUCTIVE ELASTOMERS
Introduction
EMI Shielding Gaskets for Electronic Enclosures
Shielding gaskets are, very simply, connectors of two opposing metallic planes which
make them appear as one continuous surface, by connecting across the opening.
Depending on the frequencies involved, the openings must be reduced as closely as
possible to a continuous seal. Leader Tech’s TechSIL Conductive Elastomers are made
from several different polymers and are mixed with six different types of fillers. These
blended materials will allow you to use the same gasket as an environmental seal and for
superior EMI shielding. Leader Tech’s TechSIL products have superior shielding properties
and ensure a long performance life. We offer several different manufacturing methods
that will also insure that the most cost effective method is utilized to produce your gaskets.
Benefits of Conductive Elastomer Shielding Gaskets
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Excellent Shielding Effectiveness
Excellent as an EMI shield and environmental gasket which allows for better use of space
Many different profiles and shapes available to meet your specific requirements
Low Compression forces achievable with hollow gaskets
Low cost materials and profiles available
Available with many different mounting methods
Leader Tech approved on all 12 MIL-DTL-83528 materials
(over 2,000 part numbers available)
Made in U.S.A. which allows for short lead-times ,prototyping, and ITAR compliance
Many different materials available to insure galvanic compatibility
Military and Commercial materials available to meet your specific needs
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Phone: 866.832.4364
Fax: 813.855.3291
Web: www.leadertechinc.com
Table of Contents
Material Selection Guide
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Galvanic Compatibility Chart
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Design Recommendations
Shape
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4-5
6-7
8-11
12
13
14
15
16
17
18
19
20-22
23
24
25
26
27
28
29
30
31
32-33
34
35
Sheet Material
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Extrusions
Rectangle
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Round
........................................................................................................................................
Hollow Round
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Solid D
........................................................................................................................................
Hollow D
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Hollow P
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U Channel
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Molded
O-Rings
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O-Rings D Cross Section
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Rectangle D Cross Section
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Rectangle O Cross Section
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Waveguide A
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Waveguide B
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Die Cut
Flange Mount
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Flat Circular Washer
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Specials
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Custom
....................................................................................................................................
Form-In-Place
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Our Commitment
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Additional Leader Tech Products
..............................................................................................
ISO 9001: 2008
CERTIFIED
✔
RoHS
COMPLIANT
TechSIL Conductive Elastomers
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Material Selection Guide
MATERIAL SPECIFICATIONS
LTE Material Number
Elastomer Type
Filler Material
MIL-DTL-83528 Material Type:
Electrical Properties
Volume Resistivity (Ohm-cm) (Max)
Shielding Effectiveness 20 MHz-10GHz – (dB Min)
Physical Properties
Specific Gravity (+-13%)
Hardness - Shore A (+-7)
Tensile Strength – PSI (Min)
Elongation % (Min/Max)
Tear Strength – PPI (Min)
Compression Set % (Max)
Upper Operating Temp (°C)
Lower Operating Temp (°C)
Electrical Stability
After Heat Aging, Ω cm, max
After Break, Ω cm, max
During vibration, Ω cm, max
After vibration, Ω cm, max
After Exposure to EMP, Ω cm, max
Compression / Deflection, %, min
Fluid Immersion - Survive or Non-Survive (N/S)
.010
.008
.006
.004
.010
3.5
N/S
.010
N/A
.010
.007
.010
2.5
N/S
.010
.010
.010
.005
.010
2.5
N/S
.010
.015
.012
.008
.010
3.5
N/S
.010
.010
.010
.005
.010
3.5
N/S
.015
.009
.009
.006
.015
3.5
N/S
.008
.006
.006
.005
.008
2.5
N/S
.010
.010
.010
.002
.010
2.5
N/S
.015
.020
.015
.010
.015
8.0
N/S
ASTM D792
ASTM D2240
ASTM D412
ASTM D412
ASTM D624 (DIE C)
ASTM D395
ASTM D1328
ASTM D1329
3.5
65
200
100/300
25
32
125
-55
4.75
80
600
20-N/A
70
N/A
125
-45
3.5
85
400
100/300
40
35
125
-45
2.0
65
200
100/300
30
32
160
-55
4.0
75
200
100/300
30
32
125
-55
1.9
65
200
100/300
30
30
160
-55
4.0
80
400
90/290
60
60
160
-55
3.5
65
300
200/500
50
45
160
-55
1.7
45
150
50/250
20
35
160
-55
Test Method
MIL-DTL-83528
MIL-DTL-83528
.004
110
.007
110
.005
110
.008
100
.005
100
.006
100
.005
110
.002
110
.010
80
LTE-10
SIL
Ag/Cu
A
LTE-15
SIL
Ag/Cu
G (1)
LTE-45
SIL
Ag/Cu
K
LTE-20
SIL
Ag/Al
B
LTE-65
SIL
Ag/Ni
L
LTE-50
SIL
Ag/G
M
LTE-25
SIL
Ag
H
LTE-55
SIL
Ag
E
LTE-75
SIL
Ag
J
Silicone = SIL
ELASTOMER TYPE
Fluorosilicone = F.SIL Ethylene Propylene Diene Monomer = EPDM
Silver = Ag Silver Plated Copper =
4
Phone: 866.832.4364
Fax: 813.855.3291
Web: www.leadertechinc.com
TechSIL Conductive Elastomers
MATERIAL SPECIFICATIONS
LTE Material Number
Elastomer Type
Filler Material
MIL-DTL-83528 Material Type:
Electrical Properties
Volume Resistivity (Ohm-cm) (Max)
Shielding Effectiveness 20 MHz-10GHz – (dB Min)
Physical Properties
Specific Gravity (+-13%)
Hardness - Shore A (+-7)
Tensile Strength – PSI (Min)
Elongation % (Min/Max)
Tear Strength – PPI (Min)
Compression Set % (Max)
Upper Operating Temp (°C)
Lower Operating Temp (°C)
Electrical Stability
After Heat Aging, Ω cm, max
After Break, Ω cm, max
During vibration, Ω cm, max
After vibration, Ω cm, max
After Exposure to EMP, Ω cm, max
Compression / Deflection, %, min
Fluid Immersion - Survive or Non-Survive (N/S)
.200
.100
.100
.100
.100
8.0
N/S
.150
.250
.150
.100
.150
3.0
N/S
.015
.015
.015
.010
.015
3.5
Survive
.015
.015
.015
.012
.015
3.5
Survive
.015
.025
.015
.012
.015
3.5
Survive
.010
.010
.010
.002
.010
3.5
Survive
.200
.100
.100
.100
.100
5.0
Survive
.200
.200
.015
.010
.015
3.0
N/S
.250
.250
.150
.100
.100
3.0
N/S
ASTM D792
ASTM D2240
ASTM D412
ASTM D412
ASTM D624 (DIE C)
ASTM D395
ASTM D1328
ASTM D1329
1.9
55*
150
100/300
30
25
160
-55
1.9
40
125
100/300
20
40
160
-55
4.0
75
180
100/300
35
35
125
-55
2.0
70
180
60/260
35
30
160
-55
1.9
45
100
60/260
20
35
160
-55
4.0
75
250
100/300
40
60
160
-65
2.2
70
150
60/250
40
25
160
-55
2.2
80
200
70/260
60
50
160
-40
2.2
80
200
70/260
60
40
125
-40
Test Method
MIL-DTL-83528
MIL-DTL-83528
.100
100
.100
100
.010
110
.012
90
.015
90
.002
110
.100
100
.010
90
.100
75
LTE-60
SIL
Ni/C
-
LTE-60-40D
SIL
Ni/C
-
LTE-30
F.SIL
Ag/Cu
C
LTE-40
F.SIL
Ag/Al
D
LTE-40-45D
F.SIL
Ag/Al
-
LTE-35
F.SIL
Ag
F
LTE-90
F.SIL
Ni/C
-
LTE-70
EPDM
Ag/Al
-
LTE-85
EPDM
Ni/C
-
*Extruded materials will be Shore A 70 (+/-7)
FILLER MATERIAL
= Ag/Cu Silver Plated Aluminum = Ag/Al Silver Plated Nickel = Ag/Ni Silver Plated Glass = Ag/G Nickel Coated Graphite = Ni/C
TechSIL Conductive Elastomers
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