The 2-1318120-3 is a black receptacle housing connector from TE Connectivity's Dynamic Series D-2100S single-row standard type connector family, designed for 2.5mm pin pitch applications with 3-position capacity. This connector features key dimensions of 8.9 mm (A), 20.0 mm (B), and 12.0 mm (C), providing a compact form factor suitable for wire-to-board connectivity. The housing is manufactured with gold plating and incorporates a Y-type key configuration for polarization and mating security. This receptacle housing is commonly used in industrial control systems, instrumentation, and automated equipment where reliable single-row connections are required, offering RoHS compliance and compatibility with corresponding tab housings and board-mounting headers in the Dynamic Series lineup.