Gigabit Ethernet Jack for Board-Edge Termination
The TE Connectivity 1-2301994-0 is a single-port RJ45 jack rated for 10/100/1000 Base-T and AutoMDIX — it handles the full Gigabit Ethernet signal path, not just basic 10/100 traffic. The 8-position, 1-row layout matches standard Ethernet cabling pinouts (T568A/B). Shielding is a brass shell with an integrated EMI finger. Gold-plated contacts (30.0 µin) on a copper-alloy base. LCP holds dimensional stability through reflow and resists the flux and wash chemicals used in board assembly.
What the Shielding and LED Tell You About Fit
The EMI finger on this jack is a spring contact that bears against the panel cutout, creating a bond between the connector shield and chassis ground. The green-yellow bicolor LED is integrated into the jack body. Typical wiring: green for link, yellow for activity. The LED pins are separate from the signal cores — they need their own current-limiting resistors on the board, and the forward voltage of the LED determines the resistor value. No integrated magnetics in this part — the PHY-side magnetics (transformer, common-mode choke) are on the board, not inside the connector. Tab direction is down, meaning the RJ45 plug's latch faces the PCB when mated. That orientation is standard for most PCB-mounted jacks — the latch is accessible from the top of the enclosure, and the cable strain relief pulls against the board lock, not the solder joints.