75 Ohm BNC for video and baseband — right-angle PCB mount
It mates with any standard 75 Ohm BNC plug using a bayonet lock, giving a quick-twist mate that holds under moderate vibration. The center contact is beryllium copper with silver plating, rated for 1000 mating cycles, which is well above the typical 500-cycle spec for economy BNCs. Typical use is in video distribution, baseband data, or test equipment where 75 Ohm transmission lines are standard.
200 MHz bandwidth — built for composite video and SDI
The 200 MHz frequency ceiling tells you this connector is specced for baseband video (NTSC/PAL at ~5 MHz, SD-SDI at 270 MHz is a stretch) and lower-frequency instrumentation, not high-rate serial digital video at 3 GHz. The 75 Ohm impedance matches the characteristic impedance of RG-59 and RG-6 coax, so you get a clean impedance match through the connector without a lumped discontinuity.
Right-angle footprint — board-edge or tight enclosure fit
This is a common layout for a rear-panel BNC jack where the PCB sits perpendicular to the panel. The shield termination is solder — you solder the outer braid to the ground plane through the four PCB tabs. The center contact also solders into a plated through-hole.