DOWSIL™ TC-5550 Thermally Conductive Compound is grease-like material that is highly loaded with thermally conductive fillers in a silicone matrix. This combination promotes high thermal conductivity, low pump-out and high-temperature stability. The compound is designed to maintain a positive heat sink seal to improve heat transfer from an electrical device or PCB system assembly to a heat sink or chassis, especially for consumer devices, there is also a continual trend towards smaller and more compact designs. In combination these factors typically mean that more heat is generated in the device.

Thermal management of PCB system assemblies is a primary concern of design engineers. A cooler device allows for more efficient operation and better reliability over the life of the device. As such, thermally conductive compound plays an integral role here. Thermally conductive material acts as a thermal “bridge” to remove heat from a heat source (device) to the ambient via a heat transfer media (i.e. heat sink). This material has properties such as low thermal resistance, high thermal conductivity, and thin Bond Line Thicknesses (BLTs), which can help improve heat transfer away from the device. The thermal compound has advantages over other Thermal Interface Materials (TIMs) due to anti-pump-out, ease of application on to heat sinks (screen printing), and ease of re-work.

Features & Benefits

• Good pump-out resistance for bare die application
• High thixotropy
• One part material – no cure required
• Solvent-free formulation – provides material stability
• Easy application – screen and stencil printable
• High thermal conductivity
• Achieves thin Bond Line Thickness (BLT)
• Low thermal resistance