The 48S3R3.600LCS from Calex Manufacturing is a DC to DC Converter with Input Voltage 36 to 72 V, Output Voltage 1 3.3 V, Output Current 1 0.6 A, Output Power 3 W, Isolation Voltage 1.544 kV. Tags: PCB Mount, Buck/Step down. More details for 48S3R3.600LCS can be seen below.