PDSE1-D Unregulated DC-DC Converters CUI Inc PDSE1-D Unregulated DC-DC Converters are 1W isolated modules designed to offer improved efficiency, higher isolation, and excellent thermal performance. These DC-DC converters are housed in a 7-pin DIP package and operate in a -40°C to +105°C temperature range. The PDSE1-D series features a 1:1 input range, continuous short-circuit protection, and up to 85% efficiency. CUI Inc PDSE1-D Unregulated DC-DC Converters are ideal for precise conversion and isolation of DC rails within a range of industrial, telecom, security, and machine control applications.