BNC connector

BNC connector
Male 50 ohm BNC connector
Type RF coaxial connector
Production history
Designer Paul Neill
Designed 1944
Manufacturer Various
General specifications
Diameter

Outer, typical:

  • 0.570 in (14.5 mm), male
  • 0.436 in (11.1 mm), female
Cable Coaxial
Passband Typically 0–4 GHz

The BNC connector is a miniature quick-connect/disconnect radio-frequency connector for coaxial cable. It was introduced on military radio equipment in the 1940s, and has since become widely used in radio systems and as a common type of video connector. It has a twist-to-lock design, where two lugs on the female connector engage slots in the shell of the male one.

BNC is designed to maintain the characteristic impedance of the cable across the connection, and is made in 50-ohm and 75-ohm versions. It is normally used for radio-frequency signals up to about 2 gigahertz and 500 volts.

Similar radio-frequency connectors differ in dimensions and attachment features, and may allow for higher voltages, higher frequencies, or three-wire connections.


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