75 Ohm BNC Right-Angle Adapter — Plug to Jack
The Amphenol 031-9-75RFX is a BNC-to-BNC adapter that converts a male BNC plug to a female BNC jack in a right-angle body. The right-angle orientation changes the cable exit by 90 degrees relative to the mating axis, which is the primary reason to select this over a straight adapter — it keeps the cable routed flat against a panel or inside a tight enclosure.
Impedance Match — 75 Ohm vs 50 Ohm
This adapter is designed for 75 Ohm BNC systems — common in video, broadcast, and telecom — and is not electrically interchangeable with 50 Ohm BNC. Mating a 75 Ohm adapter into a 50 Ohm line creates a mismatch that degrades return loss and signal integrity above a few hundred MHz. The 031-9-75RFX is the 75 Ohm, right-angle variant in the 031-9 family; the 031-9-75-12G is the same form factor but rated to 12 GHz with a PTFE dielectric, while the 031-220N-75RFX is a straight bulkhead jack-to-jack adapter in the same impedance.
Temperature Range and Materials
The body is brass with nickel finish, the center contacts are gold-plated brass and phosphor bronze, and the dielectric is polyoxymethylene (POM) acetal. The dual bayonet-lock fastening on both ends secures the connection against vibration in field-installed cable runs.