www.bergquistcompany.com
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PDS_GP_5000S35_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
Bramenber g 9a, 3755 BT Eemnes
Netherlands
Phone: 31-35-5380684
Fax: 31-35-5380295
The Bergquist Company - Asia
Room 15,8/F W ah Wai Industrial Centre
No.38-40,Au Pui Wan Street
Fotan, Shatin, N.T. Hong Kong
Ph: 852.2690.9296
Fax: 852.2690.2344
Gap Pad
®
5000S35
High ther mal conductivity plus “S-Class” softness and conformability
Gap Pad ®: U.S.Patent 5,679,457 and others
Features and Benefits
• High thermal conductivity: 5 W/m-K
• Highly conformable ,“S-Class” softness
• Natur al inherent tack reduces interfacial
ther mal resistance
• Conforms to demanding contours
and maintains str uctural integr ity with
little or no stress applied to fragile
component leads
• Fiberglass reinforced for puncture , shear
and tear resistance
• Excellent thermal perfor mance at
low pressures
Gap Pad 5000S35 is a fiberglass-reinforced
filler and polymer featuring a high ther mal
conductivity.The material yields extremely
soft characteristics while maintaining elasticity
and conformability.The fiberglass reinforcement
provides easy handling and converting, added
electrical isolation and tear resistance.The
inherent natural tack on both sides assists in
application and allows the product to effec-
tively fill air gaps, enhancing the overall ther-
mal performance.The top side has reduced
tack for ease of handling.Gap Pad 5000S35 is
ideal for high-performance applications at low
mounting pressures.
Typical Applications
• CDROM / DVD ROM
• Voltage Regulator Modules ( VRMs) and POLs
• Thermally-enhanced BGAs
Configurations Available:
• Die-cut parts are available in any shape or size , separ ated or in sheet for m
• Custom thicknesses available upon request
Building a Part Number Standard Options
TYPICAL PROPERTIES OF GAP PAD 5000S35
PROPERTY IMPERIAL VALUE METRIC VALUE TEST METHOD
Color Light Green Light Green Visual
Reinforcement Carr ier Fiberglass Fiberglass —
Thickness (inch) / (mm) 0.020 to 0.125 0.508 to 3.175 ASTM D374
Inherent Surface Tack (1or 2 sided) 2 2 —
Density (g/cc) 3.6 3.6 ASTM D792
Heat Capacity (J/g-K) 1.0 1.0 ASTM E1269
Hardness Bulk Rubber (Shore 00) (1) 35 35 ASTM D2240
Young’s Modulus (psi) / (kPa) (2) 17.5 121 ASTM D575
Continuous Use Temp (°F) / (°C) -76 to 392 -60 to 200 —
ELECTRICAL
Dielectric Breakdown Voltage (Vac) >5000 >5000 ASTM D149
Dielectric Constant (1000 Hz) 7.5 7.5 ASTM D150
Volume Resistivity (Ohm-meter) 109109ASTM D257
Flame Rating V-O V-O U.L. 94
THERMAL
Thermal Conductivity (W/m-K) 5.0 5.0 ASTM D5470
THERMAL PERFORMANCE VS. PRESSURE
Pressure (psi) 10 25 50
TO-220 Ther mal Performance (ºC/W) (20 mil) 1.18 1.10 0.99
Thermal Impedance (ºC-in2/W) (3) 0.21 0.18 0.15
TO-220 Ther mal Performance (ºC/W) (40 mil) 1.54 1.34 1.15
Thermal Impedance (ºC-in2/W) (3) 0.30 0.28 0.25
1) Thirty second delay value Shore 00 hardness scale . 2) Young's Modulus, calculated using 0.01 in/min. step rate of strain with a
sample size of 0.79 inch2.For more information on Gap Pad modulus,refer to Bergquist Application Note #116. 3) The ASTM D5470
test fixture was used. The recorded value includes interfacial ther mal resistance .These values are provided for reference only.Actual
application performance is directly related to the surface roughness, flatness and pressure applied.
• Memory packages / modules
• PC Board to chassis
• ASICs and DSPs
