SMA Plug Kit for Flexible RF Cables
The Amphenol RF 901-9881-RFX is a 50 Ohm SMA plug assembly kit built for field-termination on common flexible coaxial cables. It comes as a complete set: the connector body, an end cap, a crimp ferrule, and a heat shrink tube — everything needed to terminate one cable end in a single package. The connector style is SMA, male pin, with a threaded coupling nut for secure, vibration-resistant mating. Rated to 12.4 GHz with a 375 V voltage ceiling, this plug suits RF signal paths up through the lower microwave bands — think Wi-Fi access points, cellular small cells, instrumentation links, and antenna pigtails where the cable run is RG-174 or similar small-diameter coax.
Cable Compatibility and Termination Sequence
This kit is dimensioned for RG-174, RG-188A, RG-316, LMR-100, and M17/119-RG174 cables. The centre contact is soldered (gold-plated brass), the braid is captured by a crimp. The end cap threads onto the connector body after the ferrule is crimped, locking the assembly together. The weatherproof rating means the cable entry is sealed against moisture ingress once the heat shrink is properly applied — suitable for outdoor or washdown-area installations where the mating half is also sealed.
Durability and Operating Range
The nickel body finish provides a corrosion-resistant shell that mates with standard SMA jacks without galvanic compatibility issues.
The closest functional peer in the 901-98 series is the 901-9867-RFX, which is also an SMA plug kit but built for RG-405 semi-rigid cable (.085" /.086" diameter). The key difference: the 901-9867-RFX uses a solder shield termination instead of a crimp ferrule, and its body finish is gold rather than nickel. If your cable run is semi-rigid, the 901-9867-RFX is the correct pick; for flexible coax like RG-174, the 901-9881-RFX is the one.