50-Ohm BNC Jack, 4 GHz — Panel-Mount with Extended Insulation
The 227755-3: The extended insulation feature provides additional creepage distance between the center conductor and the shell, useful in applications where the connector sees voltage transients or operates near grounded metal panels. The connector is panel-mounted with a bulkhead rear-side nut and includes a lockwasher and nut in the package — three pieces total: connector, lockwasher, nut. The center contact is phosphor bronze with silver plating, terminated via solder cup.
No official replacement part number is provided. Buyers should verify the mating half and panel cutout dimensions.
What the 50 Ohm and 4 GHz Rating Mean for the Fit
The 4 GHz maximum frequency covers the full L-band and S-band, including GPS (1.575 GHz), Wi-Fi 2.4 GHz, and most cellular bands below 4 GHz. Above 4 GHz the return loss degrades; for 6 GHz work (e.g., Wi-Fi 6E) a different BNC variant or an N-type connector is needed. The silver-plated center contact gives good conductivity and solderability but is softer than gold — limit mating cycles to the rated 500 to avoid wear on the center pin.