In-Sil-8

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.
Part Numbers
(With adhesive factory
applied to one side)
1886
(1896)
1887
(1897)
1888
(1898)
1889
(1899)
Color Grey Rust Grey Grey
Thickness (inch) 0.006 0.009 0.007 0.009
Thickness (mm) 0.15 0.23 0.18 0.23
Thermal Res. (°C/W)
TO-3
TO-220
TO-218

0.40
1.40
0.93

0.21
0.63
0.49

0.33
1.25
0.77

0.50
1.50
1.16
Breakdown Voltage 6000 5000 4000 5000
Dielectric Constant 5.5 4.5 5.5 5.5

For TO-3
Standard shape
Codes "A" Dim "B" Dim "C" Dim "D" Dim
23 1.593 1.100 0.156 0.062
05 1.650 1.140 0.140 0.093
02 1.780 1.250 0.140 0.093
04 1.650 1.140 0.122 0.062
24 1.700 1.187 0.156 0.062
07 1.780 1.250 0.165 0.094
For TO-66
Standard shape
Codes "A" Dim "B" Dim "C" Dim "D" Dim
11 1.312 0.762 0.140 0.062
30 1.250 0.700 0.140 0.062
For TIP Packages
Standard shape
Codes "A" Dim "B" Dim "C" Dim "D" Dim
65 1.260 0.787 0.984 0.142
53 0.865 0.650 0.650 0.140
73 0.984 0.787 0.708 0.142
For TO-220, TO-218 & TO-247
Standard sizes
Codes "A" Dim "B" Dim "C" Dim "D" Dim
60 0.437 0.312 0.140 0.122
51 0.687 0.562 0.218 0.125
35 0.710 0.500 0.160 0.141
58 0.750 0.500 0.187 0.125
54 0.750 0.500 0.187 0.147
61 0.750 0.410 0.225 0.156
90 0.860 0.740 0.200 0.160
For Stud Mounted Devices
Standard Hole Pattern
Codes "A" Dim "B" Dim
DO-4
22
20
0.625
0.510
0.200
0.200
DO-5
21
25
0.800
1.000
0.260
0.260
Factory Applied
To order a part with a factory applied pad, indicate the appropriate ordering code in the 8th position of the part number. The shape and hole pattern of the heat sink will determine the shape and hole pattern of the pad.
If you are ordering a heat sink which mounts a semiconductor on both sides, the ordering code for two pads should be used.

8th position ordering codes
0 = No Pads
3 = One In-Sil-8 Pad
4 = Two In-Sil-8 Pads
For TO-3
Standard shape

For TO-218
Standard shapen

For TO-220
Standard shape

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