The Molex 0513380574 is a 50-position receptacle from the SlimStack 51338 series, designed for board-to-board mezzanine stacking. It uses a dual-row, center strip contact arrangement on a 0.016" (0.40mm) pitch — one of the tighter pitches in the SlimStack family, which keeps the board footprint compact for space-constrained portable electronics, wearables, and handheld devices. The mated stacking height is 1.5mm, and the receptacle itself sits 0.053" (1.35mm) above the board, so the overall z-height budget from the bottom of the host PCB to the top of the mated pair is under 3mm.
Gold contact finish at 8.00µin (0.203µm) on the mating surface — adequate for the moderate mating-cycle life typical of consumer and portable devices (a few hundred cycles), and it avoids the corrosion risk of tin in unsealed environments. Surface-mount termination with Tape & Reel packaging means the part is ready for high-volume assembly lines.