SMA (SubMiniature version A) connectors are coaxial RF connectors developed in the 1960s as a minimal connector interface for coaxial cable with a screw type coupling mechanism. The connector has a 50 Ω impedance. It offers excellent electrical performance from DC to 18 GHz.
Designed in accordance with MIL-C-39012 specifications, SMA lineup has one of the most extensive variety of applications including Semi-Flexible/Flexible cable, Receptacle, PCB, and Reverse Polarity option.
| Requirement | MIL-C-39012 | Specification |
| ELECTRICAL DATA | ||
| Impedance | 50Ω | |
| Frequency range | Semi-Rigid Cable : DC-18GHz | |
| Flexible Cable : DC-12.4GHz | ||
| Contact current | DC 2.0A max. | |
| Working voltage | Semi-Rigid Cable : 1000V | |
| Flexible Cable : 750V | ||
| Contact resistance | 3-16 | Center contacts : 3.0 mΩ |
| Outer contacts : 2.5mΩ | ||
| Insulation resistance | 3-11 | 5000MΩmin. |
| Insertion loss | 3-27 | 0.05√f(GHz)dB |
| V.S.W.R | 3-14 | ≤ 1.15+0.02f(GHz) |
| RF leakage | 3-26 | -60dBm min.between 2~3GHz |
| MECHANICAL DATA | ||
| Coupling nut torque | 12Ncm-170Ncm | |
| Coupling nut retention force | 3-25 | ≥ 200N |
| Life | 3-15 | 500 matings. |
| Contact captivation | 3-14 | ≥ 27N |
| ENVIRONMENTAL DATA | ||
| Temperature range | -65℃~+125℃ | |
| Corrosion resistance | 3-13 | MIL-STD-202, Method 101,Condition B. |
| Moisture resistance | 3-21 | MIL-STD-202, Method 106. |
| Thermal shock | 3-20 | MIL-STD-202, Method 107,Condition B. |
| Vibration | 3-18 | MIL-STD-202. Method 204,Condition D. |
| Shock | 3-19 | MIL-STD-202. Method 213,Condition I. |
| MATERIALS | ||
| Bodies | Brass or stainless steel | |
| Female contacts | Beryllium copper | |
| Insulators | PTFE Teflon | |
| Gasket | Silicone Rubber | |
| PLATINGS | ||
| Bodies | Gold plated or passivated | |
| Center contacts | Gold plated | |