SMA (SubMiniature version A)
RF test equipment connections · PCB-to-cable interfaces
Specifications
| Impedance | 50 Ω |
| Frequency Range | DC to 18 GHz |
| Max Power (1 GHz) | 100 W |
| Typical VSWR | 1.15:1 max (DC–12.4 GHz) |
| Mating Cycles | 500 |
| Body Material | Stainless steel or brass (gold-plated) |
| Contact Material | Beryllium copper, gold-plated |
Applications
- →RF test equipment connections
- →PCB-to-cable interfaces
- →Antenna connections (Wi-Fi, cellular)
- →Lab bench setups
- →Coax jumpers and assemblies
Technical Notes
Most widely used RF connector in the world. Specified to 18 GHz but quality connectors perform to 26.5 GHz. Male (plug) has center pin; female (jack) has center socket. Thread: 1/4-36 UNS-2. Do not over-torque — 3–5 in-lb typical.
Related Calculators
Microstrip Impedance
Calculate microstrip impedance using Hammerstad-Jensen equations. Get Z0, effective dielectric constant, and propagation delay for PCB trace design. Free, instant results.
VSWR / Return Loss
Convert between VSWR, return loss, reflection coefficient, and mismatch loss instantly. Get reflected and transmitted power percentages. Free, instant results.
Coax Impedance
Calculate coaxial cable characteristic impedance (Z0), capacitance, inductance per meter, and TE11 cutoff frequency from conductor dimensions. Free, instant results.