Electric/electronic parts used in the overall industry, such as electric, electronic, and automobile fields, have become lighter, smaller, and multifunctional due to the advancement of functions. Accordingly, components with various functions generate a lot of heat unlike simple electronic components. The heat generated by this deteriorates the function of the element inside the part, causes malfunction, and has the greatest influence on the lifespan and reliability of the part. In this paper, heat dissipation material development and housing were developed to improve heat dissipation efficiency. To improve heat dissipation performance, Al-based alloys were designed and manufactured. Based on this, mechanical and thermal properties were analyzed to predict heat dissipation through CAE. Based on heat dissipation analysis, material and shape optimization was performed.