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SMB

SMB SERIES- SubMinature version B Coaxial Connector
 
1. Developed in the 1960's, the SMB connector is a smaller version of the SMA connector with snap-on coupling mechanism.
 
2. The connector utilizes an inner contact and overlapping dielectric insulator structures to ensure good connectivity and a constant impedance.
 
3. It is specified in tow impedances, namely 50 and 75 ohms. The 50 ohm version of the SMB connector is
" generally specified up to 4 GHz, but the 75 ohm versions one is normally only specified to 2 GHz."
 

Application

● Base Stations
● Automotive
● Components
● Surge Protection
● Video Systems
● Instrumentation
● Automotive (GPS)

● Cable Assemblies
● Telecom
● Process Controls
● PC/LAN
● Radio Boards
● Test and
● Measurement

 

 
● Technical Characteristics
Electrical
Impedance
50 ohm/ 75 ohm
Frequency Range
0 - 4 GHz with low reflection
Working Voltage
500 VRMS max. : RG-58, 141,142, 223 335 VRMS max. : RG-174, 188, 316 250 VRMX max. : RG-178, 196: 
Dielectric Withstanding Voltage
1000 VRMS : RG-58, 141,142, 223 1000 VRMS : RG-174, 188, 316 750 VRMS : RG-178, 196
VSWR
Straight
1.3 max.
Right Angle
1.4 max.
Contact Resistance
Center Contact
6 Milliohms Max.
Outer Contact
2 Milliohms Max.
Insertion Loss
0.3dB@1.5GHz(Straight)
0.6dB@1.5GHz(Right Angle)
Insulator Resistance
1,000 Mega ohms min.
 
 
Material
Part Name
Material
Surface Treatment
Body, Metal Parts
Brass
Gold or Nickel Plating
Center Contacts
Plug: P. Bronze or Beryllium Copper
Gold Plating
(Reverse Polarity)
Jack: Brass
Gold Plating
Insulator
PTFE
None
Crimp Ferrule
Annealed Copper
Gold or Nickel Plating
Clamp Gaskets
Silicone Rubber
None
 
Mechanical
Mating
Snap-on coupling per MIL-STD-348
Engagement Force
1.8lbs. to 14.2lbs
Disengagement Force
1.8lbs. to 14.2lbs
Contact Retention
4.0 lbs. min. axial force (captivated contacts)
Durability (Mating)
500 cycles mating & unmating cyles @12 cycles per min. (For Be/Cu Jack Contact only)
 
Environmental
Temperature Range
-65°C to 165°C / - 85℉  to 329℉
Vibration
MIL-STD-202 Method 204/Test cond. D
Corrosion
MIL-STD-202 Method 101 (Test cond. B)  5% Salt solution
Thermal Shock
MIL-STD-202 Method 107/Test cond.B
  Note: These characteristics are typical but may not apply to all connectors.
 

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