SMA Jack for RG-405 Semi-Rigid, 50 Ohm to 18 GHz
The TE Connectivity 2081205-9 is a KOAXXA-series SMA jack, a female socket designed for free-hanging inline termination of RG-405 (.085" semi-rigid) cable.
Cable Termination and Shield
This jack terminates RG-405 (.085" semi-rigid) cable — the center contact is soldered, and the shield is crimped. The shield termination method (crimp) gives a reliable, repeatable ground connection without the risk of cold solder joints on the braid. The contact is included in the package (2 pieces: 1 connector, 1 contact). For field installation, the crimp shield termination is faster than a solder-braid approach and produces consistent pull-off strength.
No official replacement part number is on record from the manufacturer. If a direct drop-in replacement is required, a cross-reference search against the KOAXXA series or a parametric search for SMA jacks with the same cable group (RG-405.085") and 50 Ohm impedance is the practical next step — but no pin-compatible alternate is documented here.
The 335 V voltage rating and 500-cycle mating life are both in line with standard SMA construction. The gold center contact plating is the right choice for low intermodulation and corrosion resistance in repeated-mate scenarios. The body finish (nickel over zinc) is typical for indoor or protected-environment SMA connectors; if the application sees salt spray or outdoor exposure, a stainless-steel body variant would be preferred.