2357739-2 is a 220-position 4mm receptacle board-to-board connector designed for high-speed vertical parallel stacking applications in Computer-on-Module (COM) designs. It features a 0.5mm double-row contact pitch with 8µ" gold plating and supports data rates up to 16 GT/s, making it compatible with PCIe Gen 4 applications. The connector operates over a temperature range of -45°C to 125°C with an impedance of 85 Ohm and utilizes surface mount (SMT) PCB termination. This receptacle is ideal for COM Express Type 7 connections, embedding modules, and customized carrier boards in industries such as industrial machinery, test and measurement equipment, aerospace and defense, and medical devices.