These four new series adopt international standard pins, have strong EMI ability and good compatibility. Besides, the series provide a 4:1 ultra-wide input voltage range from 18 to 75VDC, and deliver efficiencies up to 84%. In addition to meeting EN62368 standards, protections for input under-voltage, output short circuit, over-current are also included. Applications include data transmission, telecoms, distributed power supply systems, hybrid A to D systems and remote control systems. The URD-LD-20WR3 has an operating temperature range of -40 to +105º while the other series operate from -40 to +85ºC.