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Pads
In-Sil-8
RoHS Compliant!
T-gard
TM
500
RoHS Compliant!
Thermalsil™III
RoHS Compliant!
Thermal interface pads are thicker than
double-sided tapes, but can be provided
without adhesive if removal of the pad may
be necessary. Pads can also be either
electrically conductive or isolating.
Performance of the interface pad is
dependent on maintenance of correct,
constant mounting pressure.
In-Sil-8
Standard Pads
When you need thermal conductance and
electrical isolation in one package, In-Sil-8
Pads offer you the best of both. These
silicone-based insulators come with
thermally conductive fillers to isolate up to
6000 volts AC. In-Sil-8 pads withstand the
rigors of assembly, harsh environments,
and aging under continuous use. You'll save
time with these cost-effective pads too:
installation is 4 times faster than mica and
grease, and they won't contaminate solder
baths. Order In-Sil-8 Pads with or without
pressure-sensitive adhesive, and in
standard or custom shapes.
Ordering Information
In-Sil-8 pads have 12 digit ordering numbers. The 1st - 4th digits are
listed in this chart, the 5th & 6th digits indicate standard configurations,
and the last 6 digits are F00000. The 5th and 6th digit ordering codes
along with the part dimensions are listed in the code column on the
standard pads page.
Part Numbers
1886
1887
1888
1889
(With adhesive factory
(1896) (1897) (1898) (1899)
applied to one side)
Color
Thickness (inch)
Thickness (mm)
Thermal Res. (°C/W)
TO-3
TO-220
TO-218
Breakdown Voltage
Dielectric Constant
Grey
0.006
0.15
0.40
1.40
0.93
6000
5.5
Rust
0.009
0.23
0.21
0.63
0.49
5000
4.5
Grey
0.007
0.18
0.33
1.25
0.77
4000
5.5
Grey
0.009
0.23
0.50
1.50
1.16
5000
5.5
T-gard
TM
500
T-gard
TM
500 is the recommended replacement for A-Dux
T-gard
TM
500 is a medium thermal
performance insulator pad consisting of a
ceramic filled high temperature silicone
rubber coated on electrical grade fiberglass.
T-gard
TM
500 is designed for applications
that require additional thickness to prevent
electrical shorts from stamped aluminum
heatsinks used in switching mode power
supplies (SMPS) and debris from aluminum
castings used in automotive motor controls.
T-gard
TM
500 is used in applications that
require interface of 2.5ºC/watt or higher on
a TO-220 mounted @ 50 psi pressure.
Electrical Properties
Properties
Dielectric with stand voltage
Test Method Metric Values
ASTM D149
4,500 volts AC
Imperial Values
4,500 volts AC
Dielectric Breakdown voltage ASTM D149
Volume Resistivity
Dielectric Constant @ 1 MHz
Electrical RTI Temperature
rating
ASTM D257
ASTM D257
UL 746D
>6,000 volts AC >6,000 volts AC
>1012 ohm-cm
3.3
150ºC
>1012 ohm-in
3.3
302ºF
Total Thermal Resistance
Pressure,
psi (kPa)
Units
10
(69)
25
(172)
50
(345)
100
(689)
200
(1379)
400
(2758)
Modified
ASTM
D5470
Modified
ASTM
D5470
TO-220
ºC-
in2/
watt
ºC-
cm2/
watt
ºC/
watt
0.6
0.55
0.45
0.40
0.35
0.35
3.9
3.2
2.9
2.6
2.3
2.3
2.9
2.6
2.4
2.2
2.0
2.0
Mechanical Properties
Properties
Thickness
Hardness
Tensile Strength
Elongation @45º to Warp/Fill
Elongation along width or
length
Mechanical RTI Temperature
rating
Color
UL Flammability Rating
UL 94
ASTM
D2240
ASTM D412
ASTM D412
ASTM D412
UL 746D
Test
Method
Metric
Values
0.23 mm
85 Shore A
1.3 kpsi
20%
5%
150ºC
Dark Pink
V-0
Imperial Values
0.009 inch
85 Shore A
9 mPa
20%
5%
302ºF
Dark Pink
V-0
In-Sil-8
Standard sizes
The standard sizes listed on this page are examples of some of the widely used hole patterns for In-Sil-8 Pads. Other shapes
and hole patterns are available.
For TO-3
For TO-66
Codes "A" Dim "B" Dim "C" Dim "D" Dim
23
05
02
04
24
07
1.593
1.650
1.780
1.650
1.700
1.780
1.100
1.140
1.250
1.140
1.187
1.250
.156
.140
.140
.122
.156
.165
.062
.093
.093
.062
.062
.094
Codes "A" Dim "B" Dim "C" Dim "D" Dim
11
30
1.312
1.250
.762
.700
.140
.140
.062
.062
For TIP Packages
For TO-220, TO-218 & TO-247
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