776539-3 is an AMPSEAL 16 series 12-way cap connector designed for environmentally sealed electrical connections in industrial and commercial transportation applications. This connector features a C key configuration with a black housing and yellow PLR (Positive Lock Retainer), along with a reduced diameter seal for secure wire sealing. The contact size is 1.58 mm, and the connector includes an integrated wedge/TPA (Terminal Position Assurance) for reliable contact retention. Ideal for harsh environment applications requiring robust, sealed multi-pin connections in automotive, agricultural, and industrial equipment.