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SMA is an acronym for SubMiniature version A and was developed in the 1960's. Using a threaded interface, 50 Ohm SMA connectors are precision subminiature units that provide excellent electrical performance from DC to 18 GHz. These high-performance connectors are compact in size and mechanically have outstanding durability.
SMA connectors can be used for phased array radars, test equipment, ILS landing systems and other instrumentation. With phase matching techniques, SMA connectors are used for semi-rigid coaxial cables and Plug-to-Jack adapters. Built in accordance with MIL-PRF-39012 and CECC 22110/111, SMA connectors can be mated with all connectors that meet these spec mating diameters regardless of manufacturer.
- Broadband performance DC to 18 GHz with low reflection stainless steel construction and ¼ - 36 threaded coupling offers high performance in a compact design
- Available for .047", .085" and .141" diameter semi-rigid cables and all the standard flexible cables including double shielded RG-316
- High frequency versions (up to 26.5 GHz) available
- Military
- Aerospace
- Cable Assemblies
- Telecom
- Instrumentation
- Base Stations
- Process Controls
Electrical
|
Frequency |
DC to 18 GHz |
|
Nominal Impedance |
50 Ohms |
|
|
Semi-rigid Cables: 0-18 GHz |
|
Voltage Rating |
RG-55, 58, 141, 142, 223, 303: 500 volts peak |
|
Dielectric Withstanding Voltage |
.141" and RG-58 Cables: 1,000 VRMS |
|
VSWR |
Straight connector, .085" + .141": 1.05 + .005 f (GHz) |
|
Contact Resistance Center contact Outer contact Braid to Body |
2.0 Milliohms 2.0 Milliohms 0.5 Milliohms |
|
Insulation Resistance |
5,000 Megohms minimum |
|
Insertion Loss |
dB maximum = .03?[f(GHz)] |
|
RF Leakage |
-60 dB minimum |
Mechanical
|
Mating |
.250-36 threaded coupling |
|
Mating Torque |
Minimum: 2 inch pounds (22 N.cm) |
|
Coupling Nut Retention |
Axial force: 100 inch pounds minimum (300 N.cm) |
|
Connector Affixment to Cable |
Crimp and Solder types |
|
Cable Affixment to Center Contact |
Solder, except as noted |
|
Contact Captivation |
All types unless noted otherwise |
|
Cable Retention (Crimp) |
RG-58, 303 and .141": 60 lbs. minimum |
|
Connector Durability |
500 mating and unmating cycles @ 12 cycles per minute |
Materials
|
Bodies, Coupling Nuts, Other Metal Parts (except as noted) |
Non-magnetic stainless steel style per QQ-S-764, Type 303 |
|
Contacts |
Beryllium Copper per QQ-C-530, heat treated per MIL-H-7199 |
|
Center Contact Plating |
.00005" minimum Gold per ASTMB-488, type 1, grade C. Gold over nickel unless otherwise requested. |
|
Plating (Other Metal Parts) |
Gold plated or passivated to meet the finish and corrosion requirements of MIL-PRF-39012 |
|
Insulator |
TFE fluorocarbon per ASTM D1457 |
|
Gaskets |
Silicone Rubber, per MIL-R-5847 and ZZ-R-765 class IIB, grade 65-75. |
|
Lock washers |
Stainless steel, internal tooth supplied with all bulkhead mounted connectors |
|
Crimp Ferrule |
Seamless Copper tubing alloy #122 (DHP), hard drawn to Rockwell 58-77 on 30-T scale per ASTM B75 |
Environmental
|
|
- 65°C to +165°C |
|
Thermal Shock |
MIL-STD-202 method 107 (test condition B) except high temperatures @ + 200°C |
|
Vibration |
MIL-STD-202 method 204 (test condition D) |
|
Shock |
MIL-STD-202 method 213 (test condition I). No discontinuity permitted. |
|
Corrosion |
MIL-STD-202 method 101 (test condition B) 5% salt solution |
|
Moisture Resistance |
MIL-STD-202 method 106, except step 7b (vibration) omitted, humidity measurements do not apply |
|
Weatherproofing |
Crimp type: heat shrink tubing |
|
Altitude |
MIL-STD-202 method 105 (test condition C), no corona at 70,000 feet. |