Low Density Thermally Conductive Gap Filler​ Dowsil TC5515LT

Product Attributes​​

Dowsil TC-5515 LT is a two-part, low-density thermally conductive silicone gap filler designed for efficient heat dissipation in electronic devices and electric vehicle (EV) modules. With a thermal conductivity of 2.0 W/m·K and a cured specific gravity of 1.95, this material offers a reliable solution for thermal management applications. It cures at room temperature or with accelerated heat curing and maintains its properties over a wide temperature range of -40°C to 150°C.

Product Overview​​

Dowsil TC-5515 LT is a soft and compliant material that effectively transfers heat from heat-generating components, such as EV modules and printed circuit boards, to heat sinks like aluminum housings. This gap filler is specifically engineered to provide consistent cooling performance in EV battery and control unit modules, ensuring the stability of thermal properties throughout the operational life of the device. Its non-flowable nature at both flat and vertical conditions makes it ideal for applications where positional stability is crucial.

Special Product Attributes​​

The Dowsil TC-5515 LT gap filler stands out due to its unique combination of properties. Once cured, it remains soft and compliant, providing stress relief in vibrating applications and holding its vertical position without sagging. The surface remains tacky after curing, facilitating easy rework and assembly adjustments. Additionally, it is UL 94 V0 recognized, ensuring high flame retardancy. The material's low thermal contact resistance, thanks to its low surface tension, enhances heat transfer efficiency between the substrate and the silicone material.

Application Scenarios​​

Dowsil TC-5515 LT is widely used in various industries, particularly in the automotive sector for EV battery packs and control modules. It is also suitable for use in power electronics, LED lighting, and other high-power devices where efficient thermal management is critical. The product's ability to maintain performance under extreme temperatures and its ease of rework make it a preferred choice for manufacturers looking to enhance the reliability and longevity of their products.