NHDD-40 series is a DC/DC LED driver.It operates from 360~ 420VDC and offers constant current output. Thanks to the efficiency up to 94%, with the fanless design the NHDD-40 is able to operate for -30℃~+90℃ case temperature under free air convectionn addition.NHDDis a particu ar desiar for DC 380V Bus lighting application which can be combination with storage. This coincides with the developing trend that countries around the world have begun to implement of energy saving and carbon neutrality, how to combine renewable energy sources, and effectively integrate DC power grid and energy storage systems.MEAN WELL will continue to provide products corresponding with this goal in order to reduce the loss in the power conversion and create new DC power grid lighting applications.