TNC Plug for 75 Ohm Video and Data Links
The TE Connectivity 5-1814801-3 is a TNC plug, male pin, from the ZDC/Greenpar series — a threaded RF connector family built for reliable shielded connections in broadcast, CCTV, and data transmission gear. This one is the 75 Ohm variant, which means it's tuned for video-signal paths (RG-59B, 62A, 140, 210, and others in the listed cable group) rather than the more common 50 Ohm TNC used in telecom and test equipment. The 2 GHz frequency ceiling covers the baseband and low-microwave range where most composite video and serial digital interfaces live. It ships as a three-piece kit — connector body, centre contact, and crimp ferrule — so you field-terminate it onto the cable rather than buying loose parts. The nickel-plated zinc alloy body and gold-plated brass centre contact give it decent corrosion resistance for indoor or sheltered outdoor use, and the threaded coupling ensures the pair stays mated under vibration where a bayonet might rattle loose.
Obsolete — Sourcing and Replacement Reality
No official successor order code is listed on record — TE has not published a direct drop-in replacement for this exact 75 Ohm TNC plug. If you're qualifying a new build, you'll want to evaluate a current-production 75 Ohm TNC plug from TE's standard RF catalogue or an equivalent from Amphenol RF or Cinch Connectivity — confirm the impedance, cable group, and crimp dimensions match your harness.
Both the shield and the centre contact terminate by crimp. The cable group covers RG-59B, 62A, 140, 210, KX6A, 25, 52, 53, and URM90. The dielectric is polymethylpentene (PMP). Rated for 500 mating cycles.
The 75 Ohm impedance and 2 GHz bandwidth are the real selection anchors — if your signal path is standard-definition or HD-SDI video over RG-59, this plug is electrically right. For 50 Ohm systems or frequencies above 2 GHz, you're in the wrong variant.