The Amphenol RF 920-505A-51S is a straight HD-EFI plug-to-plug adapter, converting between two HD-EFI series interfaces — both ends are female sockets. It is a same-series conversion adapter, meaning it joins two HD-EFI plugs without changing the connector family. The beryllium copper body and center contacts, gold-plated on the mating surfaces, give it the mechanical cycle life and corrosion resistance for field-deployed and lab environments alike.
The 6 GHz maximum frequency covers L-band through C-band applications; above that the insertion loss and VSWR rise beyond the adapter's design window. The straight body style keeps the cable run in line with the adapter axis, which simplifies routing in tight enclosures compared to a right-angle body. Free-hanging (in-line) mounting means no panel flange or bulkhead thread — the adapter floats in the cable run, secured only by the snap-on fastening at each end.
Materials and Durability for the Deployment
Both the body and center contacts are beryllium copper, chosen for its spring properties and conductivity over repeated mating cycles. The center contacts are gold-plated, which resists oxidation and maintains low contact resistance across the rated 200 mating cycles. The white bronze body finish provides a corrosion barrier without the galvanic compatibility issues nickel can introduce with stainless steel mating hardware.