SMA Coaxial Connectors
The Amphenol SMA connectors are semi-precision, sub-miniature, high-frequency connectors
which offer reliable broadband performance DC to 18GHz with low reflection and constant 50 ohm
impedance.
The main features are high mechanical strength, high durability and low VSWR. Matured design
principles, careful manufacturing at all stages and thorough quality assurance organization are
the bases for the well-known quality of Amphenol SMA connectors.
Electrical Specifications
Impedance
50 ohm
Frequency range
*semi-rigid cable for .141" or .085" O.D. copper jacket: 0-18 GHz
*Flexible cable: 0-12.4 GHz
Voltage rating
*RG-58, 141, 142, 233: 500v peak
*RG-174, 188, 316: 375V peak
*.141" & RG-58 cable group: 1000V RMS
*.085" & RG-316 cable group: 750V RMS
*.141" semi-rigid cable group: 1.05 + .005f
*RG-58 cable group: 1.15 + .01f
*RG-174 cable group: 1.15 + .02f
*RG-178 cable group: 1.20 + .025f
Center: 2.0 milliohms
Dielectric withstanding voltage
VSWR-straight Connectors *f in GHz
Contact resistance
Body: 2.0 milliohms
Braid tot body: 0.5 milliohms
5000 Megohms
Insulation resistance
RF leakage
-90 db min. At 2-3 GHz
Insertion loss
db max. =.06 freq. GHz.. Test frequency @6.0 GHz
Military Specifications MIL-C-39012 & MIL-C-83517 SMA
Material Specifications
Parts Name
Mil standard
Economic type
Body, coupling nut, other metal parts
Non-magnetic stainless steel per
QQ-S-764 #303
Brass per QQ-B-626
finish: passivated
finish: nickel or gold per requirement
Brass per QQ-B-626
Contacts
Male
Brass per QQ-B-626
Female
Beryllium copper per QQ-C-530
heat treated per MIL-H-7199
Finish: .00005" min gold plated per
MIL-G-45204 type 1, Grade C.
PTFE
Beryllium copper per QQ-C-530
heat treated per MIL-H-7199
Finish: .00005" min gold plated per
MIL-G-45204 type 1, Grade C.
PTFE
Insulator
Gasket
Silicone rubber
Silicone rubber
Crimp ferrule
Selection Guide
Seamless copper tubing alloy
*Suitable for direct mounting on
aluminium panels
Seamless copper tubing alloy
*For commercial applications only
*Lower cost
*Lowest cost
25
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