The TE Connectivity 2301994-7 is a single-port RJ45 jack designed for 10/100/1000 Base-T Ethernet with AutoMDIX support. It sits in the 2301994 series as the 8-core, 1000 Base-T variant with a tab-down orientation, making it the standard choice for Gigabit Ethernet board-edge applications where the locking tab faces the PCB. The jack is shielded with an EMI finger and a brass shield body, which together provide the common-mode noise rejection needed to pass the 1000 Base-T return-loss and crosstalk masks.
The 2301994-6 is a direct functional equivalent if the -7 is on allocation.