Vertical SMT Modular Jack for 6P6C Voice and Low-Speed Data
The TE Connectivity 1-338086-6 is a 6P6C modular jack — the 6-position, 6-contact footprint that accepts RJ11, RJ12, RJ14, and RJ25 plugs. It is a vertical surface-mount (SMT) part, so the plug inserts perpendicular to the PCB, which saves board-edge real estate compared to right-angle jacks. The jack is unshielded and carries a Cat3 rating, meaning it is specified for voice-grade and low-speed data links up to 16 MHz — think 10BASE-T Ethernet, analog phone lines, or RS-232 over twisted pair.
Cat3 Rating and Unshielded Body — Where It Fits and Where It Doesn't
The Cat3 rating sets the frequency ceiling at 16 MHz. That is fine for POTS, basic 10BASE-T, or low-speed control signalling, but it will not support 100BASE-TX or higher Ethernet — those need Cat5e or better. The unshielded body means there is no metal cage to bleed EMI to ground, so keep this jack away from switching power supplies, motor drives, or high-speed data lines on the same board. In a clean, low-noise environment like a telecom line card or a legacy I/O panel, it is a straightforward fit.