The Amphenol 3FA1-NASJ-C65W0 is a Code A-keyed SMB/Fakra jack — a female socket in a free-hanging (in-line) body, designed for 50 Ohm coaxial cable assemblies. It carries a 3 GHz frequency ceiling, which covers most automotive antenna feeds (GPS, SDARS, cellular) and short-reach RF interconnects where the SMB snap-on interface is preferred over a threaded SMA.
Cable Prep and Termination
The cable group list covers RG-59, 59B, 62, 140, 210, and Belden 8241, 8263, 8279, 9209. The 50 Ohm impedance of the connector matches the 50 Ohm cables in that group.
Durability and Field Life
Rated for 100 mating cycles — that is typical for an SMB-family connector and sufficient for a harness that is mated during vehicle assembly and rarely disconnected in service. The gold-plated centre contact handles the wipe without galling over that cycle count. The latch lock gives a positive tactile click when fully seated; there is no secondary lock or TPA.