2342888-3 is a QSFP-DD 1x3 surface mount cage assembly designed for high-speed 400G pluggable I/O solutions. This cage features a NET heatsink type with a heatsink height of 13.5mm and total height of 23mm (with module inserted), and is available with extruded aluminum heatsink options. The connector utilizes traditional SMT mounting with 4 rows and offers backward compatibility with existing QSFP modules. It supports an eight-lane electrical interface capable of 28 Gbps NRZ or 56 Gbps PAM-4 signaling to achieve 200 or 400 Gbps aggregate per port. Common applications include servers, switches, routers, data centers, and high-performance computing environments where superior thermal and signal integrity performance are required.