104550-6 is a 40-position fine pitch SMT stacking receptacle connector designed for parallel board-to-board interconnections. This double row vertical connector features 0.050" (1.27mm) center spacing with dimension A of 1.044" (25.52mm), dimension B of 0.950" (24.13mm), and dimension C of 1.400" (29.21mm). The housing is constructed from glass-lined black thermoplastic rated 94V-0, while contacts are phosphor bronze with gold plating in the mating area and tin-lead on solder tails over nickel underplating. This connector is ideal for compact electronic assemblies requiring reliable board-to-board connections in space-constrained applications.