75 Ohm MCX Plug for RG-405 Semi-Rigid Cable
The 252109-75: This is the 75 Ohm variant of the standard 252109 base product — the impedance is the key differentiator, as most MCX connectors are 50 Ohm.
6 GHz Bandwidth and 75 Ohm Signal Path
The snap-on fastening type gives a quick, positive mate without threads, which speeds field installation but relies on the mating jack's retention spring for pull-off resistance.
Cable Termination and Hardware Kit
The cable group is RG-405, the.085" diameter semi-rigid coax — the same size as the common RG-316 but with a solid outer conductor that requires soldering rather than crimping. The kit's end cap and ferrule capture the cable jacket and provide strain relief; the gasket seals the interface against moisture ingress.
Mating Cycles and Field Service Life
The gold-plated center contact (brass) and gold body finish resist fretting corrosion across those cycles. For a field-serviceable connector on test equipment or patch panels, 500 cycles translates to years of daily reconnections before the retention force degrades noticeably. The polyoxymethylene (POM) and PTFE dielectric materials maintain stable impedance across temperature and humidity swings.