The TE Connectivity 5555153-1 is a shielded RJ45 modular jack with 8p8c (eight position, eight contact) layout — the standard pinout for 10/100BASE-T Ethernet. Panel stops set the depth when the jack is pushed through a chassis cutout — no guesswork on how far it seats. The Cat3 rating means this jack is specified for frequencies up to 16 MHz — fine for 10BASE-T and 100BASE-TX, but not certified for Gigabit Ethernet (which needs Cat5e or better at 100 MHz).
Shielding and environmental range
The shielded shell drains common-mode noise from the cable shield to the PCB ground plane before it reaches the transformer — a real advantage in electrically noisy factory-floor environments where unshielded jacks let radiated interference couple into the signal pair.