The 0787311007: This is a 288-position DDR4 DIMM socket from Molex's 78731 series, designed for standard DDR4 memory modules. The card thickness spec of 0.055" (1.40 mm) matches the JEDEC DDR4 module thickness, ensuring the contact beams engage the module pads at the correct wipe distance. That gold thickness supports the 50+ insertion cycles typical for a server or industrial motherboard memory slot — the gold prevents oxidation on the contact surface during the life of the assembly. The through-hole mounting anchors each of the 288 pins into plated through-holes, giving the mechanical strength to handle DIMM insertion force without lifting pads. Integrated board guide, cover, and latches handle module alignment and retention. The board guide aligns the DIMM notch during insertion; the latches snap over the module ends to hold it against vibration. No separate hardware needed — the latches are part of the socket body.
The base product number is 078731, and the series is 78731. Sourced through independent distribution channels.
Board Layout Fit — Through-Hole Footprint and Keep-Out
The socket mounts through-hole, standard top orientation. The 288 pins are arranged in two rows along the 0.85 mm pitch (from the description: 0.85MM DDR4 DIMM VT PF 0.76AULF). The 0.85 mm pitch is the DDR4 standard — the same as every other DDR4 DIMM socket — so the PCB footprint follows the JEDEC MO-309 standard. The board layout engineer needs the MO-309 footprint pattern for the plated through-hole array; the keep-out zone around the socket includes clearance for the latches when they swing outward during module release. Color is black, which is cosmetic but standard for DDR4 sockets — no functional difference from other colors. The socket ships in a tray, typical for through-hole DIMM connectors to protect the pins during handling.