The TE Connectivity 5-1814820-1 is a ZDC Greenpar series mini UHF jack — a female socket with threaded coupling, right-angle through-hole mounting, and a single port. It is built for RF signal paths up to 2 GHz, with a voltage rating of 335 V and a rated mating cycle life of 500 cycles. The body is zinc alloy with nickel finish, the centre contact is phosphor bronze with tin plating, and the dielectric is polyethylene. This connector is part of the legacy Greenpar line, used in test equipment, instrumentation, and RF distribution panels where a compact threaded RF interconnect is needed.
The 2 GHz frequency ceiling is the practical bandwidth limit — above that, the non-constant impedance and the mini-UHF interface geometry introduce mismatch loss. For sub-1 GHz work (ISM, LMR, broadcast auxiliary) this connector is a cost-effective threaded alternative to a type-N or BNC. The 335 V rating is high for the form factor, so it handles RF power levels that would arc across a lower-voltage coaxial connector. 500 mating cycles is a solid field-service life for a threaded RF connector; the tin centre contact plating is adequate for moderate cycle counts in a clean indoor environment, but if frequent reconnects are expected, a gold-plated variant would extend service life.
No direct replacement or cross-reference is listed on record. If a pin-compatible alternative is acceptable, a parametric search on mini UHF jacks with the same threaded interface, right-angle through-hole mounting, and 2 GHz bandwidth may yield a current-production option, but no official cross-reference exists.