The PDQ2-D12-S5-S is a 2W isolated DC-DC converter from CUI Devices, part of the PDQ2-D-S series. It accepts a 9-18VDC input (12V nominal) and provides a regulated 5VDC single output. Key features include 3000VDC isolation, continuous short circuit protection, and a compact SIP package, making it suitable for various industrial and power management applications.