Q-Pad 3
®
Glass-Reinforced Grease Replacement Thermal Interface
Features and Benefits
• Thermal impedance:
0.35°C-in
2
/W (@50 psi)
• Eliminates processing constraints typically
associated with grease
• Conforms to surface textures
• Easy handling
• May be installed prior to soldering and
cleaning without worry
PROPERTY
Color
Reinforcement Carrier
Thickness (inch) / (mm)
Hardness (Shore A)
Continuous Use Temp (°F) / (°C)
ELECTRICAL
Dielectric Breakdown Voltage (Vac)
Dielectric Constant (1000 Hz)
Volume Resistivity (Ohm-meter)
Flame Rating
THERMAL
Thermal Conductivity (W/m-K)
THERMAL PERFORMANCE vs PRESSURE
Pressure (psi)
TO-220 Thermal Performance (°C/W)
Thermal Impedance (°C-in
2
/W) (1)
TYPICAL PROPERTIES OF Q-PAD 3
IMPERIAL VALUE
Black
Fiberglass
0.005
86
-76 to 356
Non-Insulating
NA
10
2
METRIC VALUE
Black
Fiberglass
0.127
86
-60 to 180
Non-Insulating
NA
10
2
TEST METHOD
Visual
—
ASTM D374
ASTM D2240
—
ASTM D149
ASTM D150
ASTM D257
U.L.94
ASTM D5470
V-O
2.0
10
2.26
0.65
25
1.99
0.48
V-O
2.0
50
1.76
0.35
100
1.53
0.24
200
1.30
0.16
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.
Bergquist Q-Pad 3 eliminates problems
associated with thermal grease such as conta-
mination of electronic assemblies and reflow
solder baths. Q-Pad 3 may be installed prior
to soldering and cleaning without worry.When
clamped between two surfaces, the elastomer
conforms to surface textures thereby creating
an air-free interface between heat-generating
components and heat sinks.
Fiberglass reinforcement enables Q-Pad 3 to
withstand processing stresses without losing
physical integrity. It also provides ease of
handling during application.
Typical Applications Include:
• Between a transistor and a heat sink
• Between two large surfaces such as an L-bracket and the chassis of an assembly
• Between a heat sink and a chassis
• Under electrically isolated power modules or devices such as resistors,
transformers and solid state relays
Configurations Available:
• Sheet form, die-cut parts and roll form
• With or without pressure sensitive adhesive
Building a Part Number
Q3
–
0.005
– AC – 12/250 –
NA
Standard Options
Section E
NA = Selected standard option. If not selecting a standard
option, insert company name, drawing number, and
revision level.
_ _ _ = Standard configuration dash number,
1212 = 12" x 12" sheets, 12/250 = 12" x 250' rolls, or
00 = custom configuration
AC = Adhesive, one side
00 = No adhesive
Standard thicknesses available: 0.005"
Q3 = Q-Pad 3 Material
Section B
Section C
Note: To build a part number, visit our website at www.bergquistcompany.com.
Sil-Pad
®
: U.S. Patents 4,574,879; 4,602,125; 4,602,678; 4,685,987; 4,842,911 and others
www.bergquistcompany.com
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
All statements, technical information and recommendations herein are based on tests we believe to be reliable, and
THE FOLLOWING IS MADE IN LIEU OF ALL WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING THE IMPLIED
WARRANTIES OF MARKETABILITY AND FITNESS FOR PURPOSE. Sellers’ and manufacturers’ only obligation shall be to
replace such quantity of the product proved to be defective. Before using, user shall determine the suitability of the product
for its intended use, and the user assumes all risks and liability whatsoever in connection therewith. NEITHER SELLER NOR
MANUFACTURER SHALL BE LIABLE EITHER IN TORT OR IN CONTRACT FOR ANY LOSS OR DAMAGE, DIRECT,
INCIDENTAL, OR CONSEQUENTIAL, INCLUDING LOSS OF PROFITS OR REVENUE ARISING OUT OF THE USE OR
THE INABILITY TO USE A PRODUCT. No statement, purchase order or recommendations by seller or purchaser not
contained herein shall have any force or effect unless in an agreement signed by the officers of the seller and manufacturer.
PDS_QP_3_12.08
Section D
Section A
