How to choose thermally conductive silicone sheet correctly?

How to choose thermally conductive silicone sheet correctly? What should be paid attention to when choosing thermally conductive silicone sheet? In the fiercely competitive environment of the thermally conductive silicone sheet market, many purchasers and R&D personnel have been confused about this. Now let's explore ways to solve these problems together.LMS-TC Thermal Pad

LMS-Thermal conductive silicone sheet

One of the things to note when choosing a thermally conductive silicone sheet correctly is that the thermally conductive silicone sheet itself is part of the product structure. Therefore, in the early stages of the entire product design, the appearance design, functional structural design, and heat treatment design must be considered comprehensively. The distribution and gap between the heat source and the radiator of the thermally conductive silicone sheet directly affect the choice of thickness and hardness. Some special products even need to consider the choice of thermally conductive gel. Therefore, it is recommended that designers consider the heat dissipation problem at the beginning of the design. If a thermally conductive silicone sheet solution is selected, it is recommended to minimize the gap as thinner thermally conductive silicone sheets have better thermal conductivity. Of course, it is also necessary to comprehensively consider the supporting structural parts and the operability of the construction.

The second thing to note when choosing a thermally conductive silicone sheet is: once the thermally conductive silicone sheet solution is determined, it is necessary to select the appropriate thermally conductive silicone sheet performance. First, the basic thickness of the thermally conductive silicone sheet should be determined according to the product structure and gap; while selecting the thickness of the thermally conductive silicone sheet, the hardness, compression amount, and whether the product device will be stressed after compression, and whether this stress will affect the electronic components? It is usually recommended to choose a soft thermally conductive silicone sheet with lower hardness and less stress. Of course, some designs require thermally conductive silicone sheets to play a supporting role. In this case, it is recommended to choose a thermally conductive silicone sheet with higher hardness.

The third thing to note when choosing thermally conductive silicone sheets is: After selecting the basic characteristics of thermally conductive silicone sheets according to the actual structure, an important reference standard is thermal conductivity and thermal resistance. This depends on the comprehensive consideration of product power, required cooling range and cost of thermally conductive silicone sheets. It is usually recommended to choose a thermally conductive silicone sheet that meets the requirements according to the actual situation. It is not necessarily the case that the higher the performance, the more suitable it is for actual needs, because performance that exceeds the requirements will increase the cost.

LMS-Thermal conductive silicone sheet

In addition to the above key characteristics, the selection of thermally conductive silicone sheets also needs to consider conventional voltage resistance, oil yield and fire resistance. Usually, voltage resistance and fire resistance can meet the requirements, but the oil yield is special. Many brands of thermally conductive silicone sheets on the market contain silicone oil (low molecular siloxane) to varying degrees, and silicone oil has special activity. It is easy to volatilize at high temperatures and long working hours. The volatilized silicone oil will contaminate the product and even cause sensitive components to mold and short circuit. Therefore, it is usually recommended to control the oil yield below 200PPM.

The above points are the most basic precautions and key points. If you need to recommend a suitable thermal conductive silicone sheet for a specific project, you can directly contact LMS-Thermal conductive silicone sheet. We will have professional engineers to provide you with the most professional and specific suggestions.