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PDS_SP_TUBES_12.08
The Bergquist Company -
North American Headquarters
18930 West 78th Street
Chanhassen, MN 55317
Phone: 800-347-4572
Fax: 952-835-0430
The Bergquist Company -
European Headquarters
Bramenberg 9a, 3755 BT Eemnes
Netherlands
Phone: 31-35-5380684
Fax: 31-35-5380295
The Bergquist Company - Asia
Room 15, 8/F Wah Wai Industrial Centre
No. 38-40, Au Pui Wan Street
Fotan, Shatin, N.T. Hong Kong
Ph: 852.2690.9296
Fax: 852.2690.2344
Sil-Pad Tubes
Silicone-Based,Thermally Conductive Tubes
Features and Benefits
Thermal conductivity:
SPT 400 – 0.9 W/m-K
SPT 1000 – 1.2 W/m-K
For clip-mounted plastic power packages
SPT 400 and SPT 1000 (Sil-Pad Tubes) provide
thermally conductive insulation for clip-
mounted plastic power packages. Sil-Pad
Tubes are made of silicone rubber with high
thermal conductivity.
Sil-Pad Tube 1000 is best suited for higher
thermal performance. Sil-Pad Tube 400 is ideal
for applications requiring average thermal
conductivity and economy.
Sil-Pad Tube 400 and Sil-Pad Tube 1000 are
designed to meet VDE, U.L. and TUV agency
requirements.
Typical Applications
Include:
Clip-mounted power semiconductors
TO-220,TO-218,TO-247 and TO-3P
Configurations Available:
TO-220,TO-218,TO-247 and TO-3P
Special thickness and diameters can also be
ordered. Please contact Bergquist Sales.
Standard Dimensions
A = Wall Thickness:
.305 mm (.012") + .10 mm/ -0.0 mm (+.004" / -0.0")
B = Inner Diameter:
11 mm (.433") or 13.5 mm (.532") ± 1.0 mm (± .039")
C = Length:
25 mm (.985") or 30 mm (1.18") +3.18 mm / -0.0 mm (+ .125" / - 0.0")
Special lengths are available. For more information, contact a Bergquist Sales Representative.
Ordering Procedure:
Sample:
SPT 400 ___ - ___ - ___
“A” – “B” – “C”
Sil-Pad
: U.S. Patents 4,574,879; 4,602,125;
4,602,678; 4,685,987; 4,842,911 and others.
A
B
C
TYPICAL PROPERTIES OF SIL-PAD TUBE 400
PROPERTY
IMPERIAL VALUE
METRIC VALUE
TEST METHOD
Color
Gray/Green
Visual
Thickness / Wall (inch) / (mm)
0.012
0.305
ASTM D374
Hardness (Shore A)
80
ASTM D2240
Breaking Strength (lbs/inch) / (kN/m)
6
1
ASTM D1458
Continuous Use Temp (°F) / (°C)
-76 to 356
-60 to 180
—
ELECTRICAL
Dielectric Breakdown Voltage (Vac)
5000
ASTM D149
Dielectric Constant (1000 Hz)
5.5
ASTM D150
Volume Resistivity (Ohm-meter)
10
11
10
11
ASTM D257
Flame Rating
V-O
U.L.94
THERMAL
Thermal Conductivity (W/m-K)
0.9
ASTM D5470
Thermal Impedance (°C-in2/W) (1)
0.6
ASTM D5470
TYPICAL PROPERTIES OF SIL-PAD TUBE 1000
PROPERTY
IMPERIAL VALUE
METRIC VALUE
TEST METHOD
Color
Brown
Visual
Thickness / Wall (inch) / (mm)
0.012
0.30
ASTM D374
Hardness (Shore A)
80
ASTM D2240
Breaking Strength (lbs/inch) / (kN/m)
6
1
ASTM D1458
Continuous Use Temp (°F) / (°C)
-76 to 356
-60 to 180
—
ELECTRICAL
Dielectric Breakdown Voltage (Vac)
5000
ASTM D149
Dielectric Constant (1000 Hz)
4.5
ASTM D150
Volume Resistivity (Ohm-meter)
10
11
10
11
ASTM D257
Flame Rating
V-O
U.L.94
THERMAL
Thermal Conductivity (W/m-K)
1.2
ASTM D5470
Thermal Impedance (°C-in2/W) (1)
0.4
ASTM D5470
1) The ASTM D5470 test fixture was used.The recorded value includes interfacial thermal resistance.These
values are provided for reference only. Actual application performance is directly related to the surface roughness, flatness and
pressure applied.