New gap filler gel offers very high thermal performance

The Chomerics Division of Parker Hannifin Corporation introduces THERM-A-GAP GEL 120, a one-component, dispensable, thermal interface material with a very high thermal conductivity performance. The 12W/m-K thermal conductivity of this advanced product can overcome challenging heat dissipation issues and deliver greater design flexibility as engineers look to fulfil the demanding performance expectations of end users.

The special formulation of this innovative gel reduces thermal junction temperatures and effectively conducts heat away from heat-generating electronic components. As a filler material it is excellent for use in air gaps of various thicknesses created by assembly and manufacturing tolerances or rough surfaces, from less than 0.5mm up to 4mm. Such gaps are common between components or PCBs and heat sinks, metal enclosures and chassis.

As a one-component, fully cured material, the product does not need any secondary curing or extra processes to achieve its specified physical or thermal properties.

The gel needs very low compressive force to conform under assembly pressure, placing minimal stress on electronic components, solder joints and leads in applications that include telecommunications equipment, consumer devices, mission-critical electronics, energy storage devices and automotive control units and sensors. Essentially, any electronic applications where heat dissipation is critical.

As with all thermal gels from the company, the formulation of THERM-A-GAP GEL 120 accommodates the high-performance and reliability necessities of modern electronics. The product can operate in temperatures from -50C to +200C.

To support rapid application, this versatile and reworkable product is excellent for use with robotic dispensing machines and automated assembly processes. The flow rate of THERM-A-GAP GEL 120 is 25g/min (30cc syringe with no tip, 2.5mm orifice, 621kPa). Users enjoy very closely controlled dispensing and precise material placement, leading to high repeatability and greater throughput.

Designed to satisfy a growing need for interface materials with high conductivity and greater conformability (for easier application), the supporting electrical properties of this RoHS-compliant product include: 5kVac/mm dielectric strength (ASTM D149 test method); 1013Ωcm volume resistivity (ASTM D257); 5.7 dielectric constant at 1,000KHz/2mm thick (ASTM D150); and 0.013 dissipation factor at 1,000kHz/2mm thick (Chomerics test method).

THERM-A-GAP GEL 120 is obtainable in syringe, plastic cartridge, EFD plastic cartridge, aluminium cartridge and pail containers, providing standard fill volumes from 10cc to 2500cc.