The CSD-DDR-15G-5 is a 15W DIN rail-mounted DC-DC converter from MEAN WELL. It delivers a stable 5VDC output at up to 3A from a wide 9-36VDC input range. Designed for industrial and railway use, it features reinforced 4KVDC isolation, compact 17.5mm width, and reliable operation across extreme temperatures (-40 degree C to +85 Degree C).