The SA50-28-15S from Microchip Technology is a DC to DC Converter with Input Voltage 20 to 40 V, Output Voltage 1 15 V, Output Current 1 3.4 A, Output Power 51000 mW, Operating Temperature -55 to 125 Degree C. Tags: Through Hole, Buck/Step down. More details for SA50-28-15S can be seen below.