Mean Well's MDR-40-12 is a 40W AC/DC enclosed desktop power supply with no load power consumption less than 0.3W. This PSU is an enclosed design, with a wide range of operations spanning from 90-264VAC input and adjustable output from 12V to 24V, with a maximum output of 3.3A for 12V operations. This power supply has a peak efficiency of 85%, and is rated to operate at temperatures up to +50°C without de-rating. It has wide, multiple safety features and protections, including overload protection, short circuit protection, over voltage protection and over temperature protection, as well as a flame retardant enclosure and low leakage current. The MDR-40-12 also has built-in remote-on/off, over power, and remote sense functions.