The EC3A34MS from Cincon Electronics is a DC to DC Converter with Input Voltage 36 to 72 V, Output Voltage 1 -5 to 5 V, Output Current 1 -300 to 300 mA, Output Power 3000 mW, Isolation Voltage 500 V. Tags: Through Hole, Buck/Step down. More details for EC3A34MS can be seen below.