Features:This Constant Current Power Supply Volt Reducer Module with a wide range of input from 6V to 40V,the step-down converter can accurately adjust output voltage and current.The efficiency max can be up to 95%,measured at 20A,converting 24V to 12V.The buck converter designed with dual MOS tube of large current 75V / 80A.Adopt with high frequency low resistance electrolytic capacitor for input and output use,low ripple, stable output.Board mounted 2 heat sink,enhance dissipation function for the step dowm module.Wiring is convenient with these large current 30A screw terminals.When there is a big difference between input and output voltage,please decrease power and current.Specifications:Material: FR4Input Voltage: 6V to 40V DC(10V to 40V is suggested)Output Voltage: 1.2V to 36V DCOutput Current: 20A(max.), 15A(suggested)Efficiency: 95%(24V to 12V, 20A)Output Ripple: 50mVWiring Method: TerminalShort Circuit Protection: Self-recovery(cannot short circuit for long time)Item Size: 60*53*27mm / 2.4*2.1*1.1inItem Weight: 89g / 3.1ozPackage Weight: 92g / 3.2ozPackage Size: 70*60*30mm / 2.8*2.4*1.2inWiring instructions:VO +: output positiveVO-: output negative+ IN: Input positive- IN: Input negativeCV: Output voltage regulationCC: Output current regulationEN: enable,low level to turn off output; pause,high voltage level is validWhen the input and output are grounded,the no-load CV output is constant voltage,and the CC output is constant current.Package List:1 * 300W 20A Step Down Module