The Samtec MMCXV-J-P-HF-ST-EM1 is an MMCX jack, female socket from the MMCXV-EM series, designed for 50 Ohm controlled-impedance RF signal paths. It carries a 6 GHz maximum frequency rating, which means the interface geometry and dielectric material — PTFE — are matched to keep the VSWR within spec across the band. Rated for high-vibration environments, the snap-on lock holds the pair mated under shock without a threaded collar.
The board cutout must match the MMCX flange dimensions to align the launch with the PCB edge. The gold-plated brass body provides a low-resistance shield path; the PTFE dielectric maintains consistent impedance through the transition from board trace to connector. The single-port layout suits point-to-point RF links where a single coaxial cable connects to the board edge.