In summary, TDK-Lambda’s DRF series offers very high efficiency levels, small sizes, and a low off-load power draw. The series is available in three package sizes, with an output voltage adjustable from 24 ~ 28V and can operate off a wide range AC input. The units are enclosed in a rugged metal case and mount rigidly on the standard DIN rail. The DRF series has global safety certifications and is backed by a five-year warranty.