The 3809-S05 from Modular Devices is a DC to DC Converter with Input Voltage 16 to 50 V, Output Voltage 1 4.8 to 5.2 V, Output Current 1 0.04 to 0.4 A, Output Power 2000 mW, Isolation Voltage 500 Vdc. Tags: Through Hole. More details for 3809-S05 can be seen below.