Parker Chomerics THERM-A-GAP™ A274 Highly Conformable, Thermally Conductive Gap Filler

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Parker Chomerics THERM-A-GAP™ A274 Highly Conformable, Thermally Conductive Gap Filler
Categories:	Ceramic; Oxide; Aluminum Oxide; Polymer; Thermoset; Silicone
Material Notes:	Composition: Aluminum Oxide Filled Silicone on Aluminum Foil Carrier Description: The “original” THERM-A-GAP materials, the widely used 274 Series offers good thermal performance, a choice of standard flat or ribbed profiles, and the ability to be molded into virtually any shape or special profile. Used as PCB “blankets” or in elaborate molded configurations, they have been designed into applications as divergent as cellular phone infrastructure equipment, avionics packages. Automotive electronics, and advanced HPLC instrumentation systems. Special profiles have enabled these materials to meet extremely challenging performance requirements, such as efficient cooling of multi-processor workstations. Product Attributes: Moderate thermal performance and Flat or ribbed sheets and custom molded shapes Information provided by Chomerics
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Physical Properties	Metric	English	Comments

Specific Gravity	2.00 g/cc	2.00 g/cc	ASTM D792
Thickness	460 - 560 microns	18.1 - 22.0 mil
	900 - 1100 microns	35.4 - 43.3 mil
	1620 - 1980 microns	63.8 - 78.0 mil
	2250 - 2750 microns	88.6 - 108 mil
	3050 - 3550 microns	120 - 140 mil
	3850 - 4350 microns	152 - 171 mil
	4850 - 5350 microns	191 - 211 mil
Deformation	2.0 % @Thickness 1.02 mm, Pressure 0.0345 MPa	2.0 % @Thickness 0.0400 in, Pressure 5.00 psi
	4.0 % @Thickness 5.08 mm, Pressure 0.0207 MPa	4.0 % @Thickness 0.200 in, Pressure 3.00 psi
	4.0 % @Thickness 1.02 mm, Pressure 0.207 MPa	4.0 % @Thickness 0.0400 in, Pressure 30.0 psi
	8.0 % @Thickness 5.08 mm, Pressure 0.0689 MPa	8.0 % @Thickness 0.200 in, Pressure 10.0 psi
	12 % @Thickness 5.08 mm, Pressure 0.117 MPa	12 % @Thickness 0.200 in, Pressure 17.0 psi
	16 % @Thickness 5.08 mm, Pressure 0.179 MPa	16 % @Thickness 0.200 in, Pressure 26.0 psi

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	<= 15	<= 15	ASTM D2240

Thermal Properties	Metric	English	Comments
Thermal Conductivity	0.900 W/m-K	6.25 BTU-in/hr-ft²-°F	Modified ASTM D5470
Maximum Service Temperature, Air	200 °C	392 °F
Minimum Service Temperature, Air	-50.0 °C	-58.0 °F
Flammability, UL94	V-0	V-0

Processing Properties	Metric	English	Comments
Shelf Life	12.0 Month	12.0 Month	Adhesive

Descriptive Properties
Adhesive Peel Strength	16 oz/in

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

PCHOME317 / 131027

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