The TE Connectivity 5555164-1 is an 8p8c (RJ45) modular jack, rated Cat3, in a right-angle through-hole package. The 8p8c contact arrangement matches the standard RJ45 pinout for Ethernet and telecom wiring. The unshielded design keeps the part cost low for basic data or voice applications where EMI is not a concern — think office wall plates, patch panels, or internal equipment wiring where the cable plant itself is unshielded.
The Cat3 rating limits this jack to signal frequencies up to 16 MHz, which covers 10BASE-T Ethernet, voice (POTS), and RS-232 serial over twisted pair. It is not rated for 100BASE-TX (Cat5, 100 MHz) or higher-speed Ethernet. If your BOM calls for Cat5e or Cat6 performance, this jack is not the right fit — the unshielded Cat3 construction lacks the tighter twist and impedance control needed above 16 MHz. The 50.0 µ" (1.27 µm) gold plating on the contacts is generous for the Cat3 class, giving good corrosion resistance and mating cycle life even in lightly conditioned environments.
The tab faces down, which is the standard orientation for most RJ45 jacks on vertical-mount PCBs.
It is RoHS compliant.