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 transmission line impedance using Hammerstad-Jensen equations. Get Z₀, effective dielectric constant, and propagation delay for PCB trace design.
VSWR / Return Loss
Convert between VSWR, return loss, reflection coefficient, mismatch loss, and reflected/transmitted power percentage for RF impedance matching.
Coax Impedance
Calculate coaxial cable characteristic impedance, capacitance, inductance per unit length, and cutoff frequency from inner/outer conductor dimensions and dielectric.