Jack for a 6p4c Line — Vertical Through-Hole, Gold Contacts, Board Lock
The Hirose TM3RA1X-64(50) is a vertical through-hole jack from the TM-DSA series, terminated by solder and designed for a 6p4c (RJ11/RJ14) footprint. That 6p4c keying means it accepts a 6-position, 4-conductor modular plug — common for single-line phone or low-speed data links where the centre pair carries the signal and the outer pair is unused or grounded.
This part carries a Last Buy status. That means the manufacturer has announced end of production — the window to place final orders is closing. There is no official successor listed in the evidence. For a BOM that already specifies TM3RA1X-64(50), the options are: secure last-time-buy stock through the RFQ channel now, or qualify a pin-compatible alternative. The 6p4c footprint and vertical through-hole form factor are the hard constraints — any replacement must match those exactly to drop into the existing board layout. No cross-reference to a Hirose TM-DRA series part is confirmed in the evidence.
What Bolts In — Fit Check
The 6p4c keying defines the mating plug — a standard 6-position modular plug with the centre four conductors populated. The jack is unshielded, so no ground shell or ferrite is integrated. The vertical orientation means the solder tails go straight through the board; the board lock adds mechanical retention during the solder process and under vibration. The housing is polybutylene terephthalate (PBT), which handles the reflow or wave-solder profile without distortion. If you are replacing a dead jack on a machine, pull the old one and confirm the footprint matches a 6p4c through-hole layout — same pitch, same pinout, same board lock hole pattern.