Power semiconductor device for protective circuit for controlling motor of car, has insulation portion which insulates power semiconductor element, and heat dissipation plate is provided with flow communication portion for flow of coolant

摘要

The device has a heat dissipation plate (2) consisting of metal, which is arranged at a lower surface of the power semiconductor element (1). An insulation portion (3) is arranged at the surface of the heat dissipation plate on the side opposite to a contact surface with the power semiconductor element, in order to insulate the power semiconductor element of a mounting surface (4) to the assembly of the power semiconductor element. The heat dissipation plate is provided with a flow communication portion (2a) for the flow of a coolant at the inside.