MD300Q28S12M is a DC-DC DC module power supply, 16-40Vdc input, 12Vdc output, 300W output power; it is a standard quarter-brick package and pinout, with a five-side metal structure and high power density. It has the functions of input under-voltage protection, output over-voltage protection, output over-current and short-circuit protection, negative logic remote control, output voltage fine-tuning and over-temperature protection.