The EC3SB-48S33 from Cincon Electronics is a DC to DC Converter with Input Voltage 36 to 75 V, Output Voltage 1 3.3 V, Output Current 1 4000 mA, Output Power 15000 mW, Isolation Voltage 1500 V. Tags: Through Hole, Buck/Step down. More details for EC3SB-48S33 can be seen below.