Semiconductor switch and power conversion apparatus

摘要

According to one embodiment, a switch includes a first element (1) with a first withstand voltage having, a second element (3) whose withstand voltage is lower than the first withstand voltage, a diode (4) which is connected between a positive electrode of the first element (1) and a positive electrode of the second element (3) and which has a withstand voltage equal to the first withstand voltage, a negative electrode of the first element (1) and a negative electrode of the second element (3) being connected to each other, and a circuit (5) connected in a direction in which a positive voltage is applied to the positive electrode of the first element (1) and generating at least a voltage pulse lower than the first withstand voltage and outputs the voltage pulse in synchronization with the time when first element (1) goes off.