Page 1 HTC Heat Transfer Compound HTC is a non-curing heat transfer paste, designed for use as a thermal interface material. It is recommended where the efficient and reliable thermal coupling of electronic components or heat dissipation between any surfaces are required. HTC is a non-silicone paste, suitable for applications where silicones are prohibited, thus avoiding issues with silicone and low molecular weight siloxane migration. General purpose thermal management paste cost effective heat dissipation Based on a non-silicone oil avoids issues with silicone and LMW siloxane migration Good thermal conductivity designed for use as a thermal interface material Non-curing paste allows simple and efficient rework of components if required Approvals RoHS-2 Compliant (2011/65/EU): Yes NATO Stock No. EHTC10S: 6850-99-775-5881 NATO Stock No. EHTC20S: 5835-99-775-5881 NATO Stock No. EHTC35S: 5975-99-512-1473 Typical Properties Colour: White Base: Blend of synthetic fluids Thermo-conductive Component: Powdered metal oxides Density 20C (g/ml): 2.04 Cone Penetration 20C: 300 Viscosity 1rpm (Pa s): 202-205 Thermal Conductivity (Guarded Hot Plate): 0.9 W/m.K Thermal Conductivity (Heat Flow): 0.7 W/m.K (calculated) Temperature Range: -50C to +130C Weight Loss after 96 hours 100C: <1.0% Permittivity 1 GHz: 4.2 14 Specific Resistance: 1 x 10 Ohms/cm Dielectric Strength: 42 kV/mm Description Packing Order Code Shelf Life 2 ml Syringe HTC02S 48 months Heat Transfer Compound 10 ml Syringe HTC10S 48 months 20 ml Syringe HTC20S 48 months 35 ml Luer Lock Syringe HTC35SL 48 months 700 gram cartridge HTC700G 72 months 1 Kg Bulk HTC01K 72 months 12.5kg Bulk HTC12.5K 72 months 25 Kg Bulk HTC25K 72 months Page 2 Directions for Use Thermal pastes can be applied to the base and mounting studs of diodes, transistors, thyristors, heat sinks, silicone rectifiers and semi-conductors, thermostats, power resistors and radiators, to name but a few. When the contact surfaces are placed together, a firm metal-to-metal contact will only be achieved on 40 60% of the interface, depending on the smoothness of the surfaces. This means that air, which has relatively poor thermal conductivity, will account for the balance of the interface. Only a small amount of compound is required to fill these spaces and thus dramatically increase the effective surface area for heat transfer. It is important to note that the quality of application of a thermal paste can be as important as the thermal conductivity of the material applied best results are achieved when a uniform, thin coat is applied between the mating surfaces. Apply a thin layer of compound to one of the contact surfaces using a brush, spatula, roller, automated system or screen printing technique. Ensure that the entire interface is covered to avoid hot-spots from forming. Any excess paste squeezed out during the mounting process should be removed. Additional Information There are many methods of measuring thermal conductivity, resulting in large variances in results. Electrolube utilise a heat flow method which takes into account the surface resistance of the test substrate, thus offering highly accurate results of true thermal conductivity. Some alternative methods do not account for such surface resistance and can create the illusion of higher thermal conductivity. Therefore, when comparing thermal conductivity measurements it is important to know what test method has been utilised. For more information please contact the Electrolube Technical Department. The rate at which heat flows is dependent on the temperature differential, the thickness and uniformity of the layer, and the thermal conductivity of the material. Products with the same comparable thermal conductivity value may have very different efficiencies of heat transfer in the end application depending on how successfully a thin even film can be applied. A full range of heat transfer products are available from Electrolube: high thermal conductivity pastes (HTCP), silicone based pastes for very high temperature applications (HTS), gap filling materials (HTCPX), Silicone RTVs (TCOR, TCER), epoxy adhesives (TBS) and encapsulation resins (ER2220, UR5633, SC2003). Bulk Packaging Specifications Package Size Diameter Height 700ml Cartridge 49.6mm 260mm + 15mm for Nozzle 1Kg Bulk Container 92mm 100mm 25Kg Bulk Container 254mm 330mm Revision 1: Oct 2013