SMA connectors, short for SubMiniature Version A, are semi-precision, subminiature devices that provide repeatable electrical performance from DC to 12.4 GHz with flexible cable. SMA connectors feature screw-type coupling. Semi-Rigid cabling extends the frequency range of the device to 18GHz. SMA connectors offer broadband performance with low reflections and constant 50 ohm impedance. These properties, along with minimum attenuation and low VSWR have made the SMA connector extremely popular in the microwave community. LTI SMA connectors are designed to conform to MIL-C-39012 specifications.
SMA Plug
|
SMA Jack
|
|
|
|
Letter
|
Minimum
|
Maximum
|
|
A
|
6.35
|
6.73
|
|
B
|
4.53
|
4.59
|
|
C
|
0.90
|
0.94
|
|
D
|
0.00
|
0.38
|
|
E
|
2.54
|
3.43
|
|
F
|
0.00
|
0.25
|
|
G
|
0.00
|
0.25
|
|
H
|
1.91
|
2.54
|
|
I
|
1.24
|
1.30
|
|
-
|
-
|
-
|
|
|
Letter
|
Minimum
|
Maximum
|
|
A
|
5.28
|
5.49
|
|
B
|
4.60
|
4.67
|
|
C
|
5.54
|
-
|
|
D
|
4.32
|
-
|
|
E
|
0.38
|
1.14
|
|
F
|
0.00
|
0.25
|
|
G
|
0.00
|
0.25
|
|
H
|
2.92
|
-
|
|
I
|
1.88
|
1.98
|
|
J
|
1.24
|
1.30
|
|
|
Impedance
|
50 ohm
|
|
|
RF Leakage
|
-90 dB @ 2-3 GHz
|
|
|
Insulation Resistance
|
5000 Mmin
|
|
|
Contact Resistance
|
Center Contact
|
Outer Contact
|
|
|
3.0 m max
|
2.0 m max
|
|
|
Straight Connectors
|
Right Angle Connectors
|
|
Insertion Loss
|
.04 dB max x w f GHz
|
.06 dB max x w f GHz
|
|
Cable Type
|
Semi-Rigid
|
Flexible
|
Semi-Rigid
|
Flexible
|
|
Frequency
|
DC to 18 GHz
|
DC to 12.4 GHz
|
DC to 18 GHz
|
DC to 12.4 GHz
|
|
Cable Dielectric Diameter (mm)
|
0.94
|
1.68
|
3
|
0.86
|
1.5
|
2.95
|
0.94
|
1.68
|
3
|
0.86
|
1.5
|
2.95
|
|
Dielectric Withstanding Voltage (at sea level, in V rms,50Hz)
|
1000
|
1000
|
1500
|
500
|
750
|
1000
|
1000
|
1000
|
1500
|
500
|
750
|
1000
|
|
Working Voltage (at sea level, in V rms,50Hz)
|
250
|
335
|
500
|
250
|
250
|
335
|
250
|
335
|
500
|
250
|
250
|
335
|
|
Corona Extinction Voltage (at 21000m, in V rms,50Hz)
|
250
|
250
|
375
|
190
|
190
|
250
|
250
|
250
|
375
|
190
|
190
|
250
|
|
Mating
|
1/4"-36 threaded coupling
|
|
|
|
Brass
|
Stainless Steel
|
|
Durability
|
100 matings max
|
500 matings max
|
|
Coupling Proof Torque
|
5.3 in-lbs
|
15 in-lbs
|
|
Coupling Nut Retention Force
|
60.7 lbs min
|
60.7 lbs min
|
|
Contact Captivation - Axial
|
6.1 lbs min
|
6.1 lbs min
|
|
Cable Retention
|
RG 174, 188, 316
|
RG 178, 196
|
|
|
12.1 lbs min
|
7.3 lbs min
|
|
Temperature Range
|
-65C to +165C
|
|
|
Thermal Shock
|
MIL-STD-202, Method 1017, Condition A
|
|
|
Vibration
|
MIL-STD-202, Method 204, Condition D
|
|
|
Corrosion
|
MIL-STD-202, Method 101, Condition B
|
|
|
Temperature Cycling
|
MIL-STD-202, Method 102, Condition C
|
|
|
|
|
Material
|
Plating
|
|
Connector Body
|
|
Brass per QQ-B-626
|
Gold/Nickel
|
|
Center Contact
|
Male
|
Brass per QQ-B-626
|
Gold
|
|
|
Female
|
Beryllium Copper per QQ-C-530
|
Gold
|
|
Insulator
|
|
Teflon
|
None
|
|
Gasket
|
|
Silicone Rubber
|
None
|
|
Crimp Ferrule
|
|
Annealed Copper per WW-T-799
|
Same as body
|
