The 3835-S28 from Modular Devices is a DC to DC Converter with Input Voltage 9 to 20 V, Output Voltage 1 27.7 to 28.3 V, Output Current 1 0.054 to 0.54 A, Output Power 15000 mW, Isolation Voltage 500 Vdc. Tags: Through Hole. More details for 3835-S28 can be seen below.