Board-Stacking Interconnect for Dense Mezzanine Designs
The Molex 5009130502 is a 50-position receptacle from the SlimStack 500913 series, designed for board-to-board mezzanine stacking at a 0.40 mm pitch. With two rows of gold-plated contacts and a mated stack height of 1.8 mm, it pairs with the matching SlimStack header to route dense signal arrays between parallel PCBs in space-constrained enclosures.
The 0.40 mm pitch is the tightest common spacing for mezzanine connectors — it packs 50 signals into a roughly 10 mm board edge, but forces fine-line PCB routing (trace/space below 0.15 mm typical) and a controlled-impedance stack-up if used for high-speed differential pairs. Gold plating at 8.00 µin on the contact finish supports repeated mating cycles — useful if the boards are separated during test or field service. Tin plating at this pitch would gall after fewer cycles; gold keeps contact resistance stable through multiple mates.
Solder Retention for Reflow Reliability
This is a practical detail for high-volume pick-and-place assembly — without it, the narrow pitch makes alignment critical.