THERM-A-GAP T647 | Parker Chomerics
Parker Chomerics THERM-A-FORM™ T647 is a two-component. Low modulus, high thermal conductivity (3.0 W/m-k) silicone elastomer ideal for filling complex geometries and maintaining contact with electrical components.
THERM-A-FORM™ thermally conductive silicone elastomer products are dispensable form-in-place compounds designed for heat transfer without excessive compressive force in electronics cooling applications. These versatile liquid reactive materials can be dispensed and then cured into complex geometries for cooling of multi-height components on a PCB without the expense of a molded sheet. Each compound is available in ready-to-use cartridge systems, eliminating weighing, mixing, and degassing procedures.
Technical Specifications
COLOR: Gray
POLYMER MATERIAL OPTIONS: Silicone
FILLER MATERIAL: Aluminum Oxide
PRODUCT TYPE: 2-Part
SPECIFIC GRAVITY: 2.8
DUROMETER: 25 (Shore A)
DYNAMIC VISCOSITY: > 5000 poise
OPERATIONAL LIFE: 300 minute pot life
MAXIMUM CURE TIME (AT ROOM TEMPERATURE): 3 min @ 150°C or 60 min @ 60°C or 48 hrs @ 23°C
THERMAL CONDUCTIVITY: 3 W/m-K
HEAT CAPACITY: 0.9 J/g-K
COEFFICIENT OF THERMAL EXPANSION: 150 ppm/K
OPERATING TEMPERATURE: -58 to 302 °F (-50 to 150 °C)
DIELECTRIC STRENGTH: 10 kVac/mm (250 Vac/mil)
VOLUME RESISTIVITY: 1.0 x 10^14 ohm-cm
DIELECTRIC CONSTANT: 8 @ 1000 kHz
DISSIPATION FACTOR: 0.010 @ 1000 kHz
FLAMMABILITY RATING: UL 94 V-0
OUTGASSING TOTAL MASS LOSS: Not Tested
SHELF LIFE: 3 Months
WEIGHT: 125 , 560 g
RATIO: Mix ratio 1:1 (by weight)
Features & Benefits
- Dispensable form-in-place gap filling, potting, sealing, and encapsulating
- Excellent blend of high thermal conductivity, flexibility, and ease of use
- Conformable to irregular shapes without excessive force on components
- Ready-to-use cartridge system eliminates weighing, mixing, and de-gassing steps
- Variety of kit sizes and configurations available to suit any application (handheld twin-barrel cartridges, Semco® tubes, and pneumatic applicators)
- Vibration damping
Product Attributes:
- Superior thermal performance while maintaining low modulus (3.0 W/m-k thermal conductivity)
- Flows into complex geometries to maintain intimate contact with components
- UL 94 V-0 flammability rated
- High pot life (5 hours)
