HEAT SINK TO BE MOUNTED ON PRINTED WIRING BOARD

摘要

PROBLEM TO BE SOLVED: To reduce the number of components to reduce the man-hours by connecting a plurality of heat sinks different in potential with a conductive insulator and improve the radiation efficiency by thermally connecting a plurality of radiation fins. SOLUTION: An insulator 8 is fastened to a first and second power semiconductor elements 2, 4 and heat sinks 3, 5 together by screws 10 to physically and heat conductively connect the first and second power semiconductor elements 2, 4 to the heat sinks 3, 5. This reduces the number of components to improve the assembling efficiency and the radiation efficiency due to thermal connection.