The EC4BU-12S33 from Cincon Electronics is a DC to DC Converter with Input Voltage 9 to 18 V, Output Voltage 1 3.3 V, Output Current 1 2500 mA, Output Power 10000 mW, Isolation Voltage 1500 V. Tags: Through Hole, Buck/Step down. More details for EC4BU-12S33 can be seen below.