SMB Connectors

SMB Connectors

smb
The SMB interface features a snap-on coupling mechanism and is available in 50 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 extended performance up to 10 GHz.

SMB connectors are available in various materials including an option for die cast components on non-critical areas to provide a low-cost solution. 

Find a related SMB Connector style that is right for your design using the quick links below:

Mini-SMB - 75 ohm (same size as standard SMB)

SMZ - 75 ohm, also referred to as "True 75 ohm SMB connector," not intermateable with SMB or Mini-SMB 

Features and Benefits
  • Various plating options in nickel, gold, and tin lead
  • Quick connect/disconnect snap on mating reduces installation time
  • SMB PCB slide-on plug and jack allows board-to-board mounting with a low insertion force
Applications
  • Base Stations
  • Antennas
  • Radio Boards
  • PC/LAN
  • Global Positioning System (GPS)
  • Instrumentation
  • Telecommunications

SMB Connectors Specifications

Electrical

Items
Impedance 50 Ohm
Frequency Range DC - 4 GHz (DC - 10 GHz on Extended Range Designs)
Voltage Rating 335 Volts RMS Continuous
Dielectric Withstanding Voltage 1000 VRMS Max
VSWR  (Return Loss)  
     RG-178/RG-196 Group  
     Straight Connectors 1.30 + .04 f (GHz)
     Right Angle Connectors 1.45 + .06 f (GHz)
     RG-174/RG-316/RG-188 Group  
     Straight Connectors 1.25 + .04 f (GHz)
     Right Angle Connectors 1.35 + .04 f (GHz)
Insulation Resistance  1000 MΩ Min
Center Contact Resistance 6 mΩ Max
Outer Contact Resistance 1 mΩ Max
RF Leakage -120 dB Max (DC - 3 GHz)
Insertion Loss  
     Straight Connectors .30 dB @ 1.5 GHz Max
     Right Angle Connectors .60 dB @ 1.5 GHz Max
Power Handling 95 W @ 1 GHz @ 25ºC

Environmental

Items
Temperature Range −65°C to +165°C
Thermal Shock MIL-STD-202 Method 107 (Test Condition B) except high temp test @ +200⁰C
Corrosion MIL-STD-202 Method 101 (Test Condition B) 5% Salt Solution
Vibration MIL-STD-202 Method 204, snap on (Test Condition B) (15G's)
Mechanical Shock MIL-STD-202 Method 213, snap on (Test Condition B) 75 G's @ 6 milliseconds 1/2 sine
Moisture Resistance MIL-STD-202 Method 106
Altitude MIL-STD-202 Method 105 (Test Condition C)

Mechanical

Items
Mating Cycles 500 Min
Coupling Mechanism Snap-On
Interface Specification MIL-STD-348
Engagement Force 14 lbs (62 N) Max
Disengagement Force 2 lbs (8.9 N) Max
Note: These characteristics are typical and may not apply to all connectors.
Connector configurations may affect performance.

Interface Dimensions