What this MMCX plug does in the RF path
Why the 500-cycle rating and gold plating matter
500 mating cycles is a high reconnect duty for a snap-on coax connector — the gold-on-gold interface (body finish and center contact both gold) resists wear and oxidation through those cycles. For a bench-test cable or a module that gets swapped during calibration, that cycle life means the connector stays within spec without replacing the PCB-mounted half. The 170 V voltage rating and -55°C to 155°C operating range cover the thermal envelope of outdoor telecom and industrial RF gear.
The 1408496-1 is listed as Obsolete by TE Connectivity. No official successor order code is on record. There is no documented cross-reference or pin-compatible direct replacement from TE; any substitution requires verifying the MMCX interface dimensions and PCB footprint against the application.