SAS-3 & U.2 Backplane Connectors Molex SAS-3 and U.2 (SFF-8639) Backplane Connectors support 12Gbps data rates and combine the latest enhancements of SAS-3 and U.2 technologies to suit Solid State Device (SDD) applications. These high-speed connectors include right-angle SAS-3 and U.2 receptacles featuring a common PCB footprint for cost-effective future connector upgrades. These Molex backplane connectors also offer a wide range of mating height and PCB mounting and retention configurations.