Cannon 50 Ohm Connectors
PRECISION SMA
SPECIFICATIONS
Impedance
50Ω nominal
ELECTRICAL
Frequency Range
Voltage Rating
0 to 18.0 GHz
Connectors for RG178/U series cable: At Sea Level= 170 Vrms. At 21km (70k feet) = 45 Vrms
Connectors for RG316/U series cable: At Sea Level = 250 Vrms. At 21km (70k feet) = 65 Vrms
Connectors for RG142/U series cable: At Sea Level = 335 Vrms. At 21km (70k feet) = 85 Vrms
5000 MΩ minimum
Insulation Resistance
Contact resistance
Center Contact = 3.0 m Ω maximum initial. 4.0 m Ω maximum after environment
Outer Contact = 2.0 m Ω maximum initial. 2.0 m Ω maximum after environment
Braid to Body = 0.5 m Ω maximum
2.0 A dc maximum
Contact Current Rating
Insertion Loss
0.06 x
-60 dB minimum @ 2 - 3 GHz
Connector Configuration
freq. GHz tested at 6 GHz
RF Leakage
Cable group
Straight
Right Angle
1.20 + .03F
1.15 + .03F
1.15 + .02F
Voltage Standing Wave Ratio (VSWR)
To 18 GHz or 80% of upper cut-off
frequency of the cable , whichever is lower.
Applicable to 50Ω cables only.(F = GHz)
Dielectric Withstanding Voltage (DWV)
Corona Level
RG178/U braided
RG316/U braided
RG142/U braided
1.20 + .025F
1.15 + .02F
1.15 + .01F
Connectors used with RG316/U series cable = 750 Vrms @ Sea Level
Connectors used with RG316/U series cable = 190 V @ 21km (70k feet) minimum
SMA per MIL-C-39012, Series SMA
MECHANICAL Engagement Design
Engagement Forces
Torque: 0.23 Nm (2 in. lbs.) maximum
0.03 Nm (4 in. ozs.) minimum. (For captivated contacts)
0.8 Nm to 1.1 Nm (7 to 10 in. lbs.)
Contact Torque
Mating Torque
1.4 Nm to 1.7 Nm (12 to 15 in. lbs.) minimum
Locknut Torque
267 N (60 lbs.) minimum
Coupling Nut Retention
Body & Body Components: Non-magnetic stainless steel or beryllium copper.
Female Contacts: Beryllium copper. Insulators: PTFE. Crimp Ferrule: Annealed copper alloy.
Gaskets: Silicone rubber
Materials
Center Contacts: Gold plated. Other Metal Parts: Gold plated or passivated (as specified)
to meet the finish and corrosion requirements of MIL-C-39012
-65° C to 165° C
Finish/Plating
ENVIRONMENTAL
Temperature Rating
MIL-STD-202, Method 101, test condition B, 5% salt solution
MIL-STD-202, Method 204, test condition D (20 G's)
MIL-STD-202, Method 213, test condition I (100 G's)
MIL-STD-202, Method 107, test condition B
Corrosion (salt spray)
Vibration, High Frequency
Shock
Thermal Shock
MIL-STD-202, Method 106. No measurements at high humidity. Insulation resistance
shall be 200 M Ω minimum within 5 minutes after removal from humidity.
500 matings minimum
Moisture Resistance
Connector Durability
Contact Captivation
GENERAL
Unless otherwise specified, all connectors feature captivated contacts. When captivated
the contacts will withstand 26.7 N (6 lbs.) minimum axial force.
When properly assembled to the compatible single braided coaxial cable, the retention
is equal to the breaking strength of the cable.
Cable Retention
Body Plating Options
The following part number suffices can be specified for Precision SMA Connectors
..... 310
..... 890
gold body, gold coupling nut
passivated body & coupling nut
Dimensions shown in mm (inch)
except Direct Solder Types; gold body, passivated coupling nuts
Specifications and dimensions subject to change
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