The 300W 20A DC-DC Step-down Adjustable Constant Current Module can be used to get adjustable output voltage ranges from 1.2V to 36V. The module provides a wide range of current output up to 20 A. With the heat sink mounted it can easily manage to run high power applications continuously (provided that for continuous high power output you need to use a cooling fan on the heat sink). Specification of 300W 20A Adjustable DC-DC Step Down Buck Converter Voltage Regulator Power Supply Module: Color: Silver Material: Metal Size: Approx. 60 x 52 x 27mm / 2.36 x 2.05 x 1.06” Input Voltage: DC 6-40V (10V to 40V is suggested) Output Voltage: DC 1.2-36V Output Current: 20A(max.), 15A (suggested) Efficiency: 97% (24V to 12V, 20A) Output Ripple: ≤50mV Wiring Method: Terminal Short Circuit Protection: Self-recovery (cannot short circuit for a long time) VO : Output positive VO-: Output negative IN: Input positive -IN: Input negative CV: Output voltage adjustment CC: Output current adjustment EN: Enable, low voltage level shut off output; suspension, high voltage level is effective When input and output is common grounded, no-load CV output constant voltage, CC output constant current Working Temperature: -10°C-75°C Package Include: 1 x 300W 20A Adjustable DC-DC Step Down Buck Converter Voltage Regulator Power Supply Module