What are SMB/SMC connectors?
Meet the Connector: SMB/SMC Connectors
The SMB (Sub-Miniature type B) and SMC (Sub-Miniature type C) coaxial RF connectors were first developed in the 1960s as sub-miniature connectors for fitment on RF cable and equipment. The SMB offers quick connect/disconnect snap-on mating, while the SMC has a #10-32UNF-threaded screw-type coupling mechanism that is suitable for high-vibration, rugged applications.
The connectors are available in 50 Ω and 70 Ω versions. SMB was designed for use from DC (0 Hz) to 4GHz and SMC has a maximum operating frequency of 6 to 12.4 GHz.
The choice of materials and type of surface plating is dictated by environmental demands for use. Harsh environments require IP68 versions of popular standard and customer-specific designs.
SMC may be considered reverse polarity as female jacks have a male/pin and the male plug connectors have a socket for the central contact.
SSMB and SSMC are smaller versions of SMB and SMC connectors.
Mounting configurations: Snap-on mating (SMB) and #10-32UNF-threaded screw-type coupling mechanism (SMC).
Characteristics: 50 Ω or 75 Ω impedance. DC to 4 GHz (SMB); 6 to 12.4 GHz (SMC)
Materials: Typically brass with a nickel or gold finish. Male center contacts are typically brass with gold plating. Female center contacts are beryllium copper with gold plating.
Markets, Industries, Applications:
SMB and SMC connectors are used in radio equipment and electronic instruments in the telecommunications, medical, industrial, factory automation, and robotics markets.
SMB and SMC connectors are available from many suppliers, including Amphenol, COAX Connectors Ltd., Cinch Connectivity Solutions, Hirose Electric, ITT Cannon, Radiall, Rosenberger, TE Connectivity, Delta Electronics Manufacturing, HUBER+SUHNER, Telegartner, and VidaRF