4-1564532-1 is an HDSCS tab housing connector designed for 15-way electrical connections in industrial and commercial transportation environments. This connector features a 15-cavity configuration with mixed contact sizes of 9 size 1.5K and 6 size 2.8 contacts, organized in group E with a single-key keying system for proper mating orientation. The housing is constructed in black color and includes integrated wedge/TPA (Included status), providing secure contact retention and environmental sealing. This connector is commonly used in automotive wiring harnesses, heavy-duty equipment, and transportation systems where reliable multi-pin connections and keyed mating are essential for preventing incorrect assembly and ensuring system integrity.