C connector

The C connector is a type of RF connector used for terminating coaxial cable. The interface specifications for the C and many other connectors are referenced in MIL-STD-348.^[1] The connector uses two-stud bayonet-type locks. The C connector was invented by Amphenol engineer Carl Concelman. It is weatherproof without being overly bulky. The mating arrangement is similar to that of the BNC connector.^[2] It can be used up to 11 GHz, and is rated for up to 1500 volts.

Picture comparing 75 ohm (top) and 50 ohm (bottom) C connectors

C connector

C connector on the left beside smaller BNC
Type	RF coaxial connector
Production history
Designer	Carl Concelman
Manufacturer	Various
General specifications
Diameter	Male:      0.750 in (1.91 cm) Female:  0.600 in (1.52 cm) (outer, typical)
Cable	Coaxial
Passband	Typically 0–11 GHz

See also

• USB-C (also called Type C connector)