104549-6 is a fine-pitch SMT stacking connector designed for parallel board-to-board applications with 40 positions and 0.050 inch (1.27 mm) center spacing. The connector features a double-row vertical configuration with dimensions of 1.130 inches (28.70 mm) in length and 0.950 inches (24.13 mm) in width, providing compact interconnection between stacked PCBs. The housing is constructed from glass-filled black thermoplastic rated 54V-0, with phosphor bronze contacts plated with 0.0076 inches of gold in the mating area and 0.0038 inches of tin-lead on the solder tail, ensuring reliable electrical performance and durability. The connector is ideal for applications requiring high-density interconnections in space-constrained environments such as telecommunications equipment, data processing systems, and industrial control modules.