The LMB28D from Pico Electronics is a DC to DC Converter with Input Voltage 36 to 72 V, Output Voltage 1 28 V, Output Power 75000 mW, Operating Temperature -55 to 85 Degree C, Storage Temperature -55 to 105 Degree C. Tags: Through Hole, Buck/Step down. More details for LMB28D can be seen below.