What This SMA Receptacle Delivers
The Amphenol RF 901-9891-RFX is an SMA receptacle, female socket, built for a 50 Ohm system and rated to 18 GHz — the full bandwidth of the SMA interface. The flange-mount body with threaded fastening gives a rigid panel attachment, and the extended PTFE insulation pushes the voltage standoff past the mating face, which matters in high-altitude or high-voltage RF paths where creepage distance is tight.
Brass body with a nickel finish — good RF shielding and corrosion resistance for indoor and sheltered outdoor use, though not a stainless-steel body for direct marine exposure. That contact material handles repeated deflection without taking a set, and the gold plating supports the 500 mating cycle rating without fretting the signal path.
Panel mount with a flange — four-hole pattern, standard SMA footprint. The shield terminates via solder to the panel or a ground plane, and the centre contact is solder-cup termination for RG-style coax. The threaded fastening type means the mating plug screws on, not just pushes, so vibration won't back it off.
Temperature Range and Operating Environment
This covers outdoor telecom cabinets, aerospace avionics bays, and industrial oven-adjacent gear. The extended insulation feature adds an extra margin against dielectric breakdown in low-pressure or high-voltage conditions.
The 901-9887-RFX shares the same SMA receptacle form, 50 Ohm impedance, 18 GHz ceiling, 500 mating cycles, and flange-mount with extended insulation. The difference is the centre contact material — 901-9891-RFX uses beryllium copper, while 901-9887-RFX does not list a centre contact material in its spec. For applications requiring a known spring-grade contact alloy, the 901-9891-RFX gives you the beryllium copper spec on record.