Mouser offers inventory, pricing, & datasheets for Molex QSFP-DD. Molex QSFP-DD are available at Mouser Electronics. QSFP-DD (quad small form-factor pluggable double density) doubles the capacity of QSFP interconnects with an eight-lane electrical interface capable of 28 Gbps NRZ, 56 Gbps PAM4, and 112 Gbps PAM4 to achieve up to 800 Gbps per port. 8mm pitch and a dual-mating interface. This. This guide provides a comprehensive overview of QSFP-DD compatible switches across major vendors, explains the fundamentals of backward compatibility at the port level, and outlines how to verify transceiver compatibility before procurement. Among them, the transmission distance of the former can reach up to 100 to 400 meters; the latter can reach up to 2 to.