What This 75 Ohm HD-BNC Jack Does
The Amphenol 034-1018-12G is a 75 Ohm HD-BNC jack (female socket) designed for high-frequency signal paths up to 18 GHz. It is part of the HD-BNC series, a higher-density variant of the standard BNC that maintains 75 Ohm impedance while extending the frequency range well beyond the typical BNC ceiling.
Mounting and Termination — Board Edge or Panel
This jack supports two mounting methods: board edge end launch for direct PCB attachment, or panel mount via the included bulkhead front-side nut. The bayonet lock provides quick connect/disconnect with positive retention, standard for BNC-style interfaces. Supplied as two pieces: the connector body and the bulkhead nut; plan for a lockwasher or sealing gasket separately if the application requires vibration resistance or environmental sealing.
Why 75 Ohm and 18 GHz Matter for Your Signal Path
Rated to 18 GHz, this HD-BNC variant supports signals beyond the typical BNC range.
Both are 75 Ohm, 18 GHz, single-port jacks with bayonet lock and solder termination. The key difference: the 034-1140-12G adds an isolation feature and carries a nickel/gold body finish (housing color gold and silver) versus the all-gold finish of the 034-1018-12G. If your application requires electrical isolation between the connector body and the panel, the 034-1140-12G is the variant to evaluate. For a standard non-isolated install, the 034-1018-12G covers the same frequency and impedance requirements.