SMA Connector Dimensions

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 Connector

SMA Plug Connector
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

SMA Jack Connector

SMA Jack Connector
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

Electrical Rating

Impedance 50 ohm
RF Leakage -90 dB @ 2-3 GHz
Insulation Resistance 5000 M min
Center Contact Outer Contact
Contact Resistance 20 m ohms max 10 m ohms max
Straight Right Angle
Insertion Lost .04 dB max x w f GHz .06 dB max x w f GHz
Cable Type Semi-Ridgid    Flexible Semi-Ridgid    Flexible
Frequency DC to 18 GHz    DC to 12.4 GHz DC to 18 GHz    DC to 12.4 GHz
Nominal Attenuation 3.73dB/m    3.8dB/m    2.9dB/m 5.44dB/m    5.6dB/m    4.9dB/m

Mechanical Ratings

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

Environmental Ratings

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

Materials

Material Plating
Connector Body Brass per QQ-B-626 Gold/Nickel
Male Center Contact Brass per QQ-B-626 Gold
Female Center Contact 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