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

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

See also


  1. ^ RADIO FREQUENCY CONNECTOR INTERFACES FOR MIL-DTL-3643, MIL-DTL-3650, MIL-DTL-3655, MIL-DTL-25516, MIL-PRF-31031, MIL-PRF-39012, MIL-PRF-49142, MIL-PRF-55339, MIL-DTL-83517 (B with change 3 ed.). US DOD. 2017-01-22.
  2. ^ Keith B. Schaub, Joe Kelly, Production Testing of RF and System-on-a-chip Devices for Wireless Communications, Artech House, 2004, ISBN 1580538487 page 230