The TE Connectivity 1-1734858-3 is a vertical unshielded modular jack with a 6p6c contact arrangement — it accepts 6-position, 6-conductor RJ11, RJ12, RJ14, and RJ25 plugs. The Cat3 rating limits the usable frequency range to 16 MHz, which means this jack is suited for analog telephony, basic ISDN, and low-speed serial data links rather than modern Ethernet or PoE applications. The vertical SMT orientation places the plug entry perpendicular to the PCB, a layout choice for edge-mounted or low-profile front-panel designs where the cable exits straight up from the board.
Contact Plating and Mechanical Retention
This plating grade supports several hundred mating cycles in field-service environments where connectors are reconnected during equipment maintenance. There are no through-hole posts — all mechanical hold comes from the SMT solder joints and the board guide.
Shielding and EMI Considerations
This jack is unshielded — there is no metal shell or grounding tabs to bleed common-mode noise or shield the contacts from external interference. In a metal enclosure with a grounded front panel, the chassis itself provides the EMI containment; in a plastic enclosure the jack offers no RF suppression. If the application requires conducted or radiated emissions control, a shielded equivalent from the same TE base product number family (1734858) would be the correct choice — the unshielded variant is for cost-sensitive or low-noise internal wiring where the surrounding system already manages the interference budget.