Specialty Materials for Electronic Assembly
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All Categories > Thermal Interface Materials > Gap Filling Thermal Interface > Pads Gap Filling Thermal Interface > THERM-A-GAP™ - Thermally Conductive Gap Filler Pads > Item # 579-Gap Filler  
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Item # 579-Gap Filler, THERM-A-GAP™ - Thermally Conductive Gap Filler Pads


THERM-A-GAP - Thermally Conductive Gap Filler Pads

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THERM-A-GAP™ gap-filler sheets and pads offer excellent thermal properties and highest conformability at low clamping forces.

Features/Benefits
  • Ultra low deflection force
  • High thermal conductivity
  • High tack surface reduces contact resistance
  • "A" version offers high strength acrylic PSA for permanent attachment
  • UL recognized V-0 flammability
  • RoHS compliant


    • All products are available on aluminum foil (A) or on "clean break" glass (G) fiber carrier. As with all previous Chomerics gapfillers, the "A" versions have a high strength acrylic pressure sensitive adhesive (PSA) for permanent attachment to the cold surfaces.




     Specifications   

    Test Method Color
    		Visual

    Color
    		Pink

    Carrier
    		Aluminum foil - with PSA
    Woven glass - no PSA

    Test Method Thicknesses
    		ASTM D374

    Standard Thickness1
    		0.25–5.0 mm
    0.010–0.200     in

    Test Method Specific Gravity
    		ASTM D792

    Specific Gravity
    		2.9

    Test Method Hardness
    		ASTM D2240

    Hardness, Shore 00
    		30

    Test Method Extractable Silicone
    		Chomerics

    Extractable Silicone
    		6 %

    Test Method Percent Deflection at Various Pressures
    		ASTM C165 MOD (0.125 in “G” Type, 0.50 in dia. probe, 0.025 in/min rate)

    Percent Deflection at Various Pressures (0.125 in) at 34 kPa (5 psi) Deflected
    		22 %

    Percent Deflection at Various Pressures (0.125 in) at 69 kPa (10 psi) Deflected
    		33 %

    Percent Deflection at Various Pressures (0.125 in) at 172 kPa (25 psi) Deflected
    		55 %

    Percent Deflection at Various Pressures (0.125 in) at 345 kPa (50 psi) Deflected
    		68 %

    Operating Temperature Range
    		–55 to 200 ºC
    –67 to 392     ºF

    Test Method Thermal Impedance
    		ASTM D5470

    Thermal Impedance at 10 psi, at 1mm Thickness, G Version
    		4.5 ºC-cm²/W
    0.7     ºC-in²/W

    Test Method Thermal Conductivity
    		ASTM D5470

    Thermal Conductivity
    		3 W/m·K

    Test Method Heat Capacity
    		ASTM E1269

    Heat Capacity
    		1 J/g-K

    Test Method Coefficient of Thermal Expansion
    		ASTM E831

    Coefficient of Thermal Expansion
    		150 ppm/K

    Test Method Dielectric Strength
    		ASTM D149

    Dielectric Strength
    		8 KVac/mm
    200     Vac/mil

    Test Method Volume Resistivity
    		ASTM D257

    Volume Resistivity
    		1014 O/cm

    Test Method Dielectric Constant
    		ASTM D150

    Dielectric Constant at 1000 kHz
    		8.0

    Test Method Dissipation Factor
    		Chomerics Test

    Dissipation Factor at 1000 kHz
    		0.010

    Conformability Rating
    		1

    Test Method Flammability Rating
    		UL 94

    Flammability Rating
    		V-0

    Test Method RoHS Compliant
    		Chomeric Certification

    RoHS Compliant
    		Yes

    Test Method Outgassing
    		ASTM E595

    Outgassing TML
    		0.19 %

    Outgassing CVCM
    		0.06 %

    Test Method Shelf Life
    		Chomerics

    Shelf Life, Months from Date of Shipment G
    		24

    Shelf Life, Months from Date of Shipment A
    		18
    1 Thickness tolerance, mm(in.) ±10 % nominal thickness at 2.5 mm (100 mil) or less; ± 0.25 mm (10 mil) at nominal thickness greater than 2.5 mm (100 mil). Custom thicknesses may be available upon request.