The EC3SA-12S33N from Cincon Electronics is a DC to DC Converter with Input Voltage 9 to 18 V, Output Voltage 1 3.3 V, Output Current 1 700 mA, Isolation Voltage 1500 V, Operating Temperature -40 to 85 Degree C. Tags: Through Hole, Buck/Step down. More details for EC3SA-12S33N can be seen below.