The TE Connectivity 1408393-1 is a between-series coaxial adapter that converts an SMA male plug interface to a QMA male plug interface in a straight, in-line body. The center contact is gold-plated beryllium copper for low and stable contact resistance across the passband; the brass body gets a nickel finish. Dielectric is PTFE, which keeps insertion loss predictable through the transition. Mating cycles are rated at 100, typical for a test-equipment or field-swap adapter where the QMA side sees repeated connect-disconnect cycles.
Compatibility & Interface Notes
The SMA side is a standard threaded male plug (male pin), mates with any SMA female jack (receptacle or bulkhead). The QMA side is a male plug with a male pin, mates with a QMA female jack — the snap-on retention ring locks with an audible click. The two interfaces are not mechanically interchangeable: an SMA plug does not fit a QMA jack without this adapter. The 100-cycle rating applies to the QMA side; the SMA threaded interface, if mated carefully, will outlast the QMA snap-lock under normal use.