5787170-4 is a 40-position right angle receptacle connector from the AMPLIMITE .050 Series, designed for high-density board-to-board and cable-to-board interconnect applications. This connector features a compact .050 x .100 inch (1.27 x 2.54 mm) centerline grid spacing with boardlocks for secure PCB mounting and a solder tail length of .100 inch (2.54 mm). The housing is constructed from thermoplastic rated 94V-0 and is SMT compatible, with a steel shell plated bright nickel over copper and phosphor bronze contacts featuring duplex gold plating (minimum .000030 inch / 0.00076 mm) on the mating end and tin on the solder end. This connector is ideal for data and device applications requiring reliable, high-density D-subminiature connections with secure board mounting.