If your design has pushed past the limits of a basic silicone pad but does not require a premium high-performance grade, Parker Chomerics CHO-THERM T609 offers a logical upgrade. It is a gray silicone pad reinforced with fiberglass, delivering 1.5 W per meter-Kelvin thermal conductivity and dielectric strength that exceeds standard commercial pads. At NEDC, we convert T609 into die-cut shapes and roll formats for power electronics and automotive customers who need a middle-ground material with proven reliability.
Key Specifications
- Material: Silicone with fiberglass reinforcement
- Thickness: 0.013 in (0.33 mm) with plus or minus 0.001 in tolerance
- Color: Gray
- Thermal Conductivity: 1.5 W per meter-Kelvin (ASTM D5470)
- Thermal Impedance at 300 psi: 0.33 degrees C-inch squared per watt
- Voltage Breakdown Dry: 4,000 Vac per mil (150 kVac per mm, ASTM D149)
- Volume Resistivity Dry: 10 to the 14 power ohm-cm (ASTM D257)
- Tensile Strength: 3,900 psi (26.9 MPa, ASTM D412)
- Tear Strength: 300 lb per in (52.5 kN/m, ASTM D642)
- Elongation: 30 percent (ASTM D412)
- Hardness: Shore A 70 (ASTM D2240)
- Specific Gravity: 2.10 (ASTM D792)
- Flammability: UL 94 V-0
- Heat Capacity: 1 J per gram-degree C (ASTM E1269)
- Coefficient of Thermal Expansion: 150 ppm per degree C (ASTM E831)
- Operating Temperature: minus 40 to 392 degrees F
- Shelf Life: Indefinite (dry); 6 months (with PSA)
Where T609 Fits
T609 delivers the highest thermal conductivity of the standard commercial series while keeping a familiar silicone fiberglass construction. Its lower Shore A hardness of 70 means it conforms well to slightly uneven surfaces without requiring excessive mounting pressure. This makes it a natural step up from T441 or T444 when thermal performance becomes a bottleneck in power semiconductors or motor drives.
Typical Applications
- Automotive engine and motor controllers
- Power conversion equipment
- UPS systems and energy storage
- Consumer electronics and television power supplies
NEDC supplies CHO-THERM T609 in die-cut parts, slit rolls, and sheets. Move up to T500 or 1678 for higher performance, or see our full gap filler pads guide.