1A5AH is a type of 6-pin power connector used by many off-the-shelf PC power supplies. It has two sides: male and female. The male side connects to the main power cable, and the female side carries the connection to more types of connectors, adapters, and power supplies. It is used because of its reliability, simplicity, and wide compatibility. The 6 pins consist of two 12V pins, two grounds, one 5V, and one 3.3V for DC power.