Electrolube TPM350 and TPM550 phase change materials

TPM350 and TPM550 phase change materials offer high thermal conductivity, low phase change temperatures and low thermal resistance at the interface. Phase change materials are suitable for the thermal management of electronic assemblies, offering efficient thermal transfer, high performance with thermal shock cycles and good thermal protection where temperature spikes can occur.

Once heated above their phase change temperature, the phase change materials become highly thixotropic liquids that perform at least as well as thermal grease, according to the company. The consistency and performance of the materials also avoids possible application and migration problems that can be associated with thermal greases.

TPM350 has a thermal conductivity of 3.5 W/mK and becomes workable at approximately 50°C. At this temperature it changes state to become a lower viscosity material, minimising contact thermal resistance and improving thermal conductivity. Once it cools, it reverts back to its original state. The material’s advanced formulation ensures minimal contact thermal resistance.

TPM550 has a higher thermal conductivity of 5.5 W/mK and an activation temperature of 45°C. In common with TPM350, TPM550 produces no mess due to its thixotropic characteristics which prevent flow outside of defined interfaces. Both TPM350 and TPM550 can be reworked and their low specific gravity means that more applications can be served per kilogram of the materials.

The phase change materials are silicone free, have an operating temperature range of -40 to +125°C and are RoHS-2 compliant. They are both screen printable and, while they contain small amounts of solvent to improve wettability on application, this rapidly evaporates following application to leave the solid phase change material on the substrate.