The SA50-28-28S from Microchip Technology is a DC to DC Converter with Input Voltage 20 to 40 V, Output Voltage 1 28 V, Output Current 1 2 A, Output Power 56000 mW, Operating Temperature -55 to 125 Degree C. Tags: Through Hole, Buck-Boost. More details for SA50-28-28S can be seen below.