Sometimes the right thermal pad does more than conduct heat. It also needs to survive assembly, resist puncture, and maintain its dimensions under pressure. Parker Chomerics CHO-THERM 1674 is a blue silicone fiberglass pad that balances thermal performance with mechanical toughness and broad operating temperature range. At NEDC, we convert 1674 for customers in automotive, industrial, and power electronics who need reliability without jumping to premium high-performance pricing.
Key Specifications
- Material: Silicone with fiberglass reinforcement
- Thickness: 0.010 in (0.25 mm) with plus or minus 0.001 in tolerance
- Color: Blue
- Thermal Conductivity: 1.0 W per meter-Kelvin (ASTM D5470)
- Thermal Impedance at 300 psi: 0.41 degrees C-inch squared per watt
- Voltage Breakdown Dry: 2,500 Vac per mil (100 kVac per mm, ASTM D149)
- Volume Resistivity Dry: 10 to the 14 power ohm-cm
- Tensile Strength: 1,500 psi (10.3 MPa, ASTM D412)
- Tear Strength: 14 lb per in
- Hardness: Shore A 85 (ASTM D2240)
- Specific Gravity: 2.45 (ASTM D792)
- Flammability: UL 94 V-0 (See UL File E140244)
- Operating Temperature: minus 40 to 392 degrees F
- Shelf Life: Indefinite (dry); 12 months (with PSA)
Why Specify CHO-THERM 1674?
1674 provides good thermal properties alongside mechanical robustness. Its 0.010-inch standard thickness keeps it compatible with common transistor package footprints while the fiberglass carrier resists tearing during handling and assembly. The wider operating temperature range also makes it a practical choice for outdoor or automotive enclosures exposed to ambient temperature swings.
Typical Applications
- Automotive electronics and motor controls
- Power supplies and conversion systems
- Television and display backlighting
- Consumer electronics needing rugged assembly
Contact NEDC for die-cut parts, sheets, and roll stock of CHO-THERM 1674. For higher performance, consider 1678. For a non-silicone alternative, see T444.