The SMB Connectors (Subminiature version B) interface features a snap-on coupling mechanism and is available in 50 Ohm and 75 Ohm configurations. SMB connectors conform to the requirements of MIL-C-39012, and the interface is in compliance with MIL-STD-348. SMB connectors offer broadband performance with low reflection DC to 4 GHz and utilize die cast components on non-critical areas to provide a low-cost solution.

SMB (Subminiature version B) Connectors have a snap-on coupling and are available for 50 OHM and 75 OHM offering electrical performance from DC to 4GHz (50 OHM) and from DC to 2GHz (75 OHM). SMB Styles are available for flexible, conformable and semi-rigid cables. SMB series are available for mounting to printed circuit boards employing through-hole soldered, through-hole press-fit and surface mount technique (SMD). Solder, crimp and clamp modes are used to assemble SMB connectors to cables. Applications include Base Stations, Automotive, GPS, Telecom Cable Assemblies, Components, Instrumentation PC/LAN, Process Controls, Radio Boards Surge Protection, Test and Measurement Video Systems.

SMB & SMC are all the same type but with different coupling system.
SMB has a snap-on coupling that is rapid but secure connections.
SMC has a threaded coupling for vibration environments.


  • Selective plating provides corrosion resistance finish as well as good solder-ability characteristics
  • Various plating options in nickel, gold, and tin lead
  • SMB PCB slide-on plug and jack allows board-to-board mounting with a low insertion force making this is ideal for mating a high number of connectors on a pair of PCB’s


  • Antennas
  • Base Stations
  • Cable Assembly
  • Components
  • GPS
  • Instrumentation
  • Process Controls
  • PC/LAN
  • Radio Boards
  • Radio Boards
  • Surge Protection
  • Telecom
  • Test and Measurement
  • Vedio System


Impedance50 ohm / 75 ohm
Frequency rangeDC ~ 4 GHz (50 ohm) / DC~ 2 GHz (75 ohm)
VSWR 1.3 Max (Straight)
 1.5 Max (Right Angle)
Dielectric withstanding voltage
Working voltage335 V rms
Center contact resistance6 m ohm
Outer contact resistance1 m ohm
Insulation resistance100 M ohm
Contact Retention
Mating torque
Mating Durability500 mating cycles
Temperature Range−65ºC ~ +155 ºC
Corrosion resistance
Body, coupling nutBrass
Center contactBrass (male) / Beryllium or Phosphor bronze (female)
Crimping FerruleAnnealed copper ally
Body platingGold
Center contact platingGold

Note: These characteristics are typical but may not apply to all connectors.