Specifications: Color: SilverMaterial: MetalSize: 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 1.2-36VOutput Current: 20A(max.), 15A (suggested)Efficiency: 97% (24V to 12V, 20A)Output Ripple: ≤50mVWiring Method: TerminalShort Circuit Protection: Self-recovery (cannot short circuit for a long time)VO+: Output positiveVO-: Output negative+IN: Input positive-IN: Input negativeCV: Output voltage adjustmentCC: Output current adjustmentEN: Enable, low voltage level shut off output; suspension, high voltage level is effectiveWhen input and output is common grounded, no-load CV output constant voltage, CC output constant currentWorking Tempreture: -10°C-75°C Features: With a wide input voltage range from 6V to 40V, the step-down converter can accurately adjust output voltage and currentThe efficiency can be up to 96%, measured at 20A, converting 24V to 12VDesigned with 75V/80A large current dual MOS tubeThe buck module has 2 heat sink that could enhance heat dissipationWiring is convenient with these large current 30A screw terminalsInput and output use high frequency low resistance electrolytic capacitor, low ripple, stable outputStable and reliableFine workmanship and durable Package included: 1 x 300W 20A adjustable step-down converter module
The unit is OK.
I tested it for 24V input, 11V output ay 10A current.
The output voltage is relatively constant (from 11.5V no load to 11.2V at 10A).
The temperatures are:
100 dgr.C for transformer,
100 dgr.C for one heatsink and 80 dgr.C for the other.
A good DC-DC converter. I use it to regulate the output power of a LED power supply for my hobby projects. The filter capacitor for the trimmer potentiometer has a dedicated spot on the PCB. This is not common for some of these boards which can be annoying when you want to replace the trimmers to some other potmeters. The solders look nice and clean. Heatsink goes hot when larger power is used, so it is a good idea to use some fan to keep it cool.