The SRS-4812 from Mean Well is a DC to DC Converter with Input Voltage 43.2 to 52.8 V, Output Voltage 1 12 V, Output Current 1 0 to 42 mA, Output Power 500 mW, Operating Temperature -25 to 71 Degree C. Tags: Through Hole, Buck/Step down. More details for SRS-4812 can be seen below.