5176139-2 is a Standard Edge II card edge connector featuring a special 18/31 dual combination configuration with 52 dual positions and 2.54 mm (0.100 inch) centerline spacing. The connector utilizes solder post termination with a post length of 3.18 mm (0.125 inch) and is mounted vertically on the PCB with integrated retention features at positions 5, 6, 31, 32, 41, 42, 93, and 94. The housing is constructed from polyester glass-filled material in black with UL 94V-0 flammability rating, and features gold-plated mating contacts over a phosphor bronze base with nickel underplate for reliable electrical performance. The connector is RoHS/ELV compliant and supports wave solder processes at temperatures up to 265°C, making it suitable for industrial and commercial applications requiring robust edge card interconnection.