DSA15IM45IB is a IXYS integrated circuit, a type of power switch specifically designed to provide overcurrent and overvoltage protection. It is composed of an IGBT and rectifier bridge integrated in a single package. The device is suitable for applications such as AC switching, DC switching, and power control. The device can handle up to 15A of DC current and up to 45V of DC voltage. It also features an active current limit, undervoltage lockout, and soft-start capabilities.