75 Ohm MCX Receptacle for SMT Assembly
The Amphenol 919-226J-71P is a 75 Ohm MCX receptacle, female socket, designed for surface-mount assembly. It is part of the 91922 series, a subminiature snap-on coaxial interface that mates with standard MCX plugs. The 75 Ohm impedance targets video, broadband, and CATV signal paths — not the 50 Ohm RF chain common in telecom or test equipment. The gold-plated brass body and beryllium copper center contact with gold plating deliver 500 mating cycles, a solid reconnect life for a snap-on connector.
Impedance and Frequency — What 75 Ohm Means for the Signal Path
This is not a 50 Ohm MCX — plugging a 50 Ohm cable into this receptacle creates an impedance mismatch that degrades return loss and increases VSWR. The connector is rated to 1 GHz maximum frequency with 0.1 dB insertion loss, which is consistent with a quality 75 Ohm video/data path. For 50 Ohm applications, look for a 50 Ohm variant in the same 91922 series.
SMT Termination and Assembly Fit
Surface-mount termination means this receptacle is intended for automated pick-and-place reflow assembly, not hand-soldering. The snap-on fastening provides quick, tool-less mating with a standard MCX plug — the audible click confirms full engagement. The gold body finish and gold center contact plating resist corrosion in humid or mildly corrosive environments.
Materials and Operating Range
The brass body with gold finish and beryllium copper center contact with gold plating give this connector a robust mechanical and electrical life.