The Hirose TM5RJ1-88(50) is an 8p8c (RJ45, Ethernet) jack from the TM-DS series, terminated by solder to a through-hole PCB. Mechanical features include a board lock for solder-joint strain relief, keying to prevent mis-mating, and panel stops that set the insertion depth against the chassis cutout.
The Sourcing Reality — Obsolete, Sourced to Order
That means no new factory orders — the only remaining supply is through surplus or distributor inventory. If you need a current-production alternative, the search for a form-fit-function cross-reference is the next step — same 8p8c pinout, right-angle through-hole footprint, and board-lock/keying features.
Mating and Termination — What Connects Where
This jack mates with a standard RJ45 plug (8p8c) — no proprietary keying beyond the standard RJ45 interface. The right-angle orientation means the plug enters from the side, not straight on. The single-row, single-port design keeps the footprint compact.