Features:This is a DC-DC step down converter module that convert 12V~55V to 1.25V~53V.
The module supports USB interface, the rated current is 2A and rated voltage 5V, that could be used as charger or power supply for USB equipment.
It has a DC 12V high quality cooling fan which will automatically start up or stop due to module working state.
Current is related to voltage difference and temperature. When it is large current and causes to much heat for chip, it will automatically reduce output power. Due to the limit of maximum power, maximum current will differ according to various output voltage.
The input voltage limit is 55V, and when input voltage is more than 55V, master control chip will burn out as well as module will be damaged.

Specifications:
Type: Non-isolated step-down module (BUCK)
Input Voltage: DC 12V to 55V
Output Voltage: 1.25V to 53V DC(stepless, continuously adjustable)
Max. Output Current: 20A
Max. Efficiency: 95%
Max. Power: 300W
Frequency: 300KHz
Operating Temperature: -40℃ to +85℃
USB Interface:Yes (Rated current 2A, rated voltage 5V)
Short Circuit Protection: Yes
Reverse Input Protection: Yes
Reverse Output Protection: Yes
Transient Over Voltage Protection: Yes
Over Temperature Protection: Yes (Automatic reduce voltage and power or shut off output)
Size: 86 x 59 x 51mm / 3.38 x 2.32 x 2"

Package Includes:
1 x Module