Series SMA RF Coaxial Connector, short for SubMiniature version A, is a classic, high-performance RF connecting component featuring a precision threaded locking mechanism. Compliant with MIL-C-39012, IEC 60169-15 and GJB 681A standards, it is renowned for its excellent high-frequency performance, compact structure and reliable mating, serving as the most widely used core interconnection part in medium-to-high frequency RF systems across industries.
The series boasts superior and stable electrical performance tailored for high-frequency scenarios. With a fixed characteristic impedance of 50Ω (75Ω optional for specific applications), it supports a working frequency range of DC to 18GHz (up to 26.5GHz for precision enhanced models). Key parameters are outstanding: VSWR is controlled within ≤1.10, insertion loss is as low as 0.03×√f (GHz) dB, contact resistance of inner conductor ≤3mΩ and outer conductor ≤2mΩ, insulation resistance ≥5000MΩ, ensuring minimal signal attenuation and strong anti-interference capability.
Its unique advantages lie in the 10-32 UNS threaded coupling and compact size. The threaded design ensures firm mating and strong vibration resistance, suitable for harsh environments, while its miniature structure enables high-density PCB layout. Manufactured with precision processes, it adopts brass housing (nickel or gold-plated), gold-plated beryllium copper contacts and PTFE insulators, withstanding -55℃ to +155℃ working temperature and 500+ plugging cycles.
Widely applied in 5G communication, radar systems, satellite communication, test instruments, medical devices and wireless routers, it is usually paired with RG-174, RG-316 and RG-58 coaxial cables. As a mature, cost-effective solution, it remains the benchmark for high-frequency RF interconnection, supporting the stable operation of various high-performance electronic systems.