The CQB75-300S3V3 from Cincon Electronics is a DC to DC Converter with Input Voltage 180 to 450 V, Output Voltage 1 3.3 V, Output Current 1 15000 mA, Output Power 75000 mW, Isolation Voltage 500 to 4200 V. Tags: Screw Mount, Buck/Step down. More details for CQB75-300S3V3 can be seen below.