Radiator is used to control the semiconductor device junction temperature less than the maximum junction temperature. Radiator generally use high thermal conductivity of the material.laptop cooling Electronic machine products at home and abroad in the radiator material is generally used in aluminum, copper, iron. The most widely used is aluminum (thermal conductivity 2.12W/cm · ℃). High thermal conductivity of copper (3.85W/cm · ℃), but less than the cost of aluminum is low, the number of small electronic machine products, some of the radiator made ​​of steel material, although the difference between the thermal conductivity of steel (0.46W / cm · ℃), but its cost is low, the product can be used in less demanding. In general, the thicker the material and the surface area of ​​the radiator greater the cooling effect is better, but in the power semiconductor devices to ensure the normal operation of the actual junction temperature less than the maximum junction temperature case, you should try to use less material varieties of small

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