The TE Connectivity 555980-1 is a 4p4c RJ22 jack — the 4-position, 4-contact modular connector used on telephone handsets, base stations, and low-speed data equipment. It is a right-angle, through-hole solder jack with a board lock that anchors the part during wave soldering and resists shear from cable strain. The Cat3 rating means this jack is specified for voice-band and 10BASE-T Ethernet at best — it is not built for Cat5e or higher data rates.
If your assembly can accept a functional equivalent, the 4p4c RJ22 form factor and Cat3 rating are the parameters to match; verify the footprint and board lock position against your PCB layout.
The 4p4c (4 position, 4 contact) layout is the RJ22 standard — four conductors in a single row, narrower than the 6-position RJ12/RJ14 jacks. The board lock is a pair of solder-hook features that pull the jack flat against the board during reflow and keep it seated under the insertion force of a mating plug. The Cat3 rating limits the usable bandwidth to about 16 MHz — fine for POTS and 10BASE-T, but a Cat5e or Cat6 jack is needed for 100BASE-TX or higher. The 50.0µin gold is heavy enough for corrosive environments (industrial, telecom huts) where tin contacts would fret.