2138557-1 is a 2-position housing for female terminals in TE Connectivity's Generation Y Connector System, supporting wire-to-board, wire-to-device, and wire-to-wire configurations. The housing features a rectangular connector shape with integrated primary locking, keyed mating alignment, and terminal position assurance for secure connections. It is constructed from PBT GF material with a 2.54 mm centerline pitch, dimensions of 19.2 mm length × 7.64 mm width × 10.05 mm height, and operates reliably across a temperature range of -40°C to +100°C at a nominal voltage of 12 V. The connector uses 0.64 mm receptacle contacts with a 0.64 mm mating tab width and is mounted as a cable-mount (free-hanging) assembly. This housing is ideal for automotive applications requiring robust signal connectivity with keyed alignment and position assurance features.