SMB Fakra Jack for RG-58 Cable Groups
It's a Code D keyed variant in the Fakra connector family, which means it carries the violet/claret housing colour and the latch-lock fastening that prevents accidental unmating in automotive infotainment and antenna modules. The 50 Ohm impedance and DC to 6 GHz frequency range put it squarely in the GPS, satellite radio, and cellular signal path — not a general-purpose RF connector, but a tuned 50 Ohm link for cable groups like RG-58, RG-141, RG-303, LMR-195, and Belden B7806A.
Cable Prep and Termination
This jack comes as a 3-piece kit: the connector body, the centre contact, and the ferrule. The centre contact crimps onto the signal wire (phosphor bronze, gold-plated), and the shield termination is a crimp-over-braid style using the supplied ferrule. The cable groups it supports are all 50 Ohm coax with a nominal 0.195-inch jacket diameter — RG-58, 58A/B/C, 141, 303, LMR-195, and Belden 7806A/9907. The dielectric material is PTFE, so the centre conductor stays centred through the crimp cycle and the impedance holds through the transition.
RF Performance and Mechanical Life
Rated insertion loss is 0.3 dB across the band, and the maximum operating frequency is 6 GHz — enough for 5 GHz Wi-Fi or dual-band GNSS without a notch. The 100 mating cycles are typical for a Fakra latch-lock connector; the gold-plated centre contact and nickel-plated zinc die-cast body handle the wear.