177900-1 is a Power Double Lock (PDL) free-hanging plug housing connector designed for wire-to-board and wire-to-wire applications. It features 4 circuits arranged in 2 rows with a 3.96 mm centerline spacing and is constructed from UL94V-0, 6/6 nylon material in natural color. The connector incorporates Lock Type II mechanism and is compatible with double lock plates (part number 177918-1x2) for secure mating with corresponding cap housings and tab headers. This connector is RoHS compliant and is commonly used in high-density interconnect applications requiring reliable power distribution and signal transmission in compact spaces.