Interface Materials
Insulators
Aluminum Oxide Ceramic
Insulating Covers
Bushings
Mica
Thermalsil
Beryllium Oxide Ceramic
Hard Anodized Aluminum
RoHS Compliant
Thermally Conductive Silicone Rubber Insulators
The newest Thermalsil III formula has improved thermal conductivity, providing excellent
thermal resistance. It is used as an electrically-isolating interface material composed of
silicone elastomer binder with a thermally conductive filler. It is reinforced with glass cloth
to resist tearing and cut-through due to burrs on transistors or heat sinks.
Thermalsil III eliminates the need for grease application and conforms to mounting
surfaces under clamping pressure for optimum heat conduction.
Thermalsil III is 0.152mm (0.006") thick and grey green in color. A finely woven glass cloth
provides the thinnest possible matrix for enhanced thermal resistance.
To order Thermalsil III with adhesive coated backing, add suffix "AC" to the part number.
For example, 53-03-2AC.
Thermalsil III is available in any configuration with adhesive backing. Order by adding "AC"
after the part number. For example: 53-03-2AC.
Bulk Thermalsil III
Thermalsil III is also available in three widths, with and without adhesive coated backing
(AC). Thermalsil III is 0.152mm (0.006") thick.
Part No.* RoHS PCN Width
5300 1.500G N/A 38.10mm (1.500")
5300AC 1.500G 38.10mm (1.500")
5300 2.875G N/A 76.20mm (3.000")
5300AC 2.875G N/A 76.20mm (3.000")
5300 6.000G N/A 152.40mm (6.000")
5300AC 6.000G N/A 152.40mm (6.000")
*Available in full (328 ft.) length rolls only
Thermalsil III
Property Typical Value 25°C Test Method
Electrical
Dielectric Constant
2.5@50 Hz
2.5@103 Hz
2.5@106 Hz
ASTM D150
Dielectric Breakdown
Voltage
26.3 x 103 volts/mm (667 volts/mil) ASTM
D-149 ASTM D149
Volume Resistivity 5.7 x 1015 ohm-cm ASTM D257
Dielectric Dissipation
Factor
.008@50 Hz
.004 @103 Hz
.004 @106 Hz
ASTM D150
Physical
Thickness .15 + .03/-.05mm
(0.006 + .001/-.002 in.)
Color Gray-Green
Tensile Strength 6.1 x 107 Pa (8786 psil)
Hardness, Shore A 87
Elongation 2% or less
Thermal
Thermal Conductivity 0.92 w/m °C
Flame Resistance UL 94V-0 UL card #E-58126
(S)
Service Temperature -60°C to 180°C
(-76°F to 356°F)
Standard Thermalsil Configurations
Thermalsil III Check Distributor Stock
Enter a part number for
pricing and availability.
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Part
Number RoHS PCN A B C D
53-03-2G 42.04
(1.655)
27.00
(1.063)
3.96
(0.156)
1.57
(0.062)
53-03-11G N/A 41.81
(1.646)
28.58
(1.125)
3.96
(0.156)
2.36
(0.093)
53-03-12G N/A 41.91
(1.650)
28.96
(1.140)
3.56
(0.140)
2.36
(0.093)
53-03-14G N/A 39.70
(1.563)
26.67
(1.050)
3.56
(0.140)
2.36
(0.093)
53-03-15G N/A 40.46
(1.593)
27.94
(1.100)
3.96
(0.140)
1.78
(0.070)
53-03-16G N/A 43.18
(1.700)
30.15
(1.187)
3.96
(0.156)
1.60
(0.063)
Part
Number A B C D E F G
53-02-95G 23.24
(0.915)
18.80
(0.740)
16.26
(0.640)
6.99
(0.275)
9.40
(0.370)
5.59
(0.220)
3.66
(0.144)
53-02-
103G**
23.80
(0.937)
19.05
(0.750)
16.66
(0.656)
7.14
(0.281)
9.53
(0.375)
3.18
(0.125)
53-78-3G*
**
25.40
(1.000)
20.32
(0.800)
Part
Number RoHS PCN A B C D
53-77-2G 17.50
(0.687)
14.27
(0.562)
5.54
(0.218)
3.18
(0.125)
53-77-3G 17.50
(0.687)
41.27
(0.562)
4.70
(0.185)
2.36
(0.093)
53-77-4G 19.05
(0.750)
12.70
(0.500)
4.75
(0.187)
3.73
(0.147)
53-77-5G N/A 20.32
(0.800)
15.24
(0.600)
5.54
(0.218)
2.79
(0.110)
53-77-9G N/A 18.42
(0.725)
13.21
(0.520)
4.32
(0.170)
2.92
(0.115)
53-77-10G N/A 20.96
(0.825)
22.99
(0.905)
5.33
(0.210)
3.68
(0.145)
53-77-11G N/A 26.16
(1.030)
13.21
(0.520)
3.81
(0.150)
3.30
(0.130)
53-77-13G N/A 18.03
(0.710)
12.70
(0.500)
4.06
(0.160)
3.58
(0.141)
53-78-1G* N/A 22.10
(0.870)
15.70
(0.620)
Part Number A B
53-02-10G 14.27 (0.562) 5.16 (0.203)
53-02-25G 20.62 (0.812) 6.73 (0.266)
* This insulator is made especially for clip-mount heat sinks, thus requiring no mounting
hole.
** These insulators may also be used for TO-3P and TO-247 devices.
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