1-178288-4 is a single-row 4-position receptacle housing connector from TE Connectivity's Dynamic D-3100S series, designed for wire-to-board applications. This connector features a 3.81mm pin pitch, black housing color, and X keying configuration for proper mating alignment. The housing has external dimensions of 30.6mm (A dimension) and is compatible with gold-plated board-mounting headers in both horizontal and vertical configurations. This RoHS-compliant connector is suitable for industrial automation, control systems, and power distribution applications where reliable electrical connections are required.