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CHO-THERM® HIGH-POWER THERMAL INSULATOR PADS are thermally conductive materials designed for use where the highest possible thermal, dielectric, and mechanical properties are required.

Fiberglass cloth reinforcement strengthens CHO-THERM® pads against tear, cut-through and punctures.

These materials are available in sheet form and die-cut configurations. An optional adhesive layer (with PSA) is available on one or two sides. With a proven track record spanning several decades in multiple applications, these products are the first choice for high-end power supplies, industrial, aerospace, and military/avionics applications.

Available in several different forms to suit various applications.

Features/Benefits
  • Excellent thermal properties
  • High dielectric strength
  • Excellent mechanical strength and puncture resistance
    • Unit of Measure

    Color

    		 N/A Green

    Reinforcement Carrier

    		 N/A Fiberglass

    Test Method Thicknesses

    		 N/A ASTM D374

    Thickness

    		 N/A 0.25 mm0.010 in

    Thickness Tolerance

    		 N/A ± 0.050 mm± 0.002 in

    Test Method Specific Gravity

    		 N/A ASTM D792

    Specific Gravity

    		 N/A 1.60

    Test Method Hardness

    		 N/A ASTM D2240

    Hardness, Shore A

    		 N/A 80

    Operating Temperature Range

    		 N/A –40 to 200 ºC–40 to 392 ºF

    Test Method Thermal Impedance

    		 N/A ASTM D5470

    Thermal Impedance

    		 N/A 1.2 ºC-cm²/W0.19 ºC-in²/W

    Test Method Apparen Thermal Conductivity

    		 N/A ASTM D5470

    Apparen Thermal Conductivity

    		 N/A 2.1 W/m·K

    Test Method Heat Capacity

    		 N/A ASTM E1269

    Heat Capacity

    		 N/A 1.0 J/g-ºC

    Test Method Coefficient of Thermal Expansion

    		 N/A ASTM E831

    Coefficient of Thermal Expansion

    		 N/A 250 ppm/K

    Test Method Volume Resistivity Dry

    		 N/A ASTM D149

    Volume Resistivity Dry

    		 N/A 1016 O/cm

    Test Method Voltage Breakdown Dry

    		 N/A ASTM D149

    Voltage Breakdown Dry

    		 N/A 4000 Vac

    Test Method Tensile Strength

    		 N/A Chomerics

    Tensile Strength

    		 N/A 20.7 MPa3000 psi

    Test Method Tear Strength

    		 N/A Chomerics

    Tear Strength

    		 N/A 70 kN/m400 lb/in

    Test Method Elongation

    		 N/A Chomerics

    Elongation

    		 N/A 20 %

    Test Method Dielectric Constant

    		 N/A ASTM D150

    Dielectric Constant at 1000 kHz

    		 N/A 3.5

    Test Method Dissipation Factor

    		 N/A Chomerics Test

    Dissipation Factor at 1000 kHz

    		 N/A 0.003

    Test Method Flammability Rating

    		 N/A UL 94

    Flammability Rating

    		 N/A V-0

    Test Method RoHS Compliant

    		 N/A Chomeric Certification

    RoHS Compliant

    		 N/A Yes

    Test Method Outgassing

    		 N/A ASTM E595

    Outgassing TML

    		 N/A 0.40 %

    Outgassing CVCM

    		 N/A 0.10 %

    Test Method Shelf Life

    		 N/A Chomerics

    Shelf Life, Months from Dry Pad

    		 N/A 24

    Shelf Life, Months from Dry Pad with PSA

    		 N/A 18