Overview
The SMC connector is a subminiature RF coaxial connector designed for applications requiring a compact, high-performance interface. It features a threaded coupling mechanism that provides secure, vibration-resistant connections and maintains consistent electrical performance. SMC connectors are typically available in 50 ohm and 75 ohm impedance versions, supporting broadband frequencies from DC up to 4 GHz. Their small size makes them ideal for space-constrained applications, including telecommunications, test equipment, instrumentation, railway communications and signaling systems,in-vehicle infotainment and connectivity systemsand military systems. Available in both straight and right-angle configurations, as well as PCB-mount options, SMC connectors deliver reliable, low-reflection signal transmission in demanding environments.
Features
Meets the interface dimensions specified by MIL-STD-348.
Threaded coupling provides secure, vibration-resistant connections for demanding applications.
Well-suited for semi-rigid or miniature flexible coaxial cables.
Applications
Antennas
PC/LAN
Telecommunications
Instrumentation
in-vehicle infotainment and connectivity systems
railway communications and signaling systems
vehicle radar (24 GHz, 77 GHz for ADAS)
Specification
Cable Type | RG178 |
| Body Plating | Gold |
| Body Material | Brass |
| Contact Plating | Gold |
| Contact Material | Phosphor bronze |
| Insulator Material | PTFE |
| Cable Termination | Crimp |
| Coupling Mechanism | Thread |
HS Code | 8636909000 |
Frequency (Max GHz) | 4 |
Gender | Female |
Impedance (Ohms) | 50 |
Size Category | Miniature |
Orientation | Straight |
Temperature Range | -65 to 165 ° C |
Mating Cycles | 500 Min |
Interface Specification | IEC 60169-9 |
FAQ
Sample Delivery Time
Regular models require 15 days, while some complex connectors require 25 days.
Sample Fee
Most RF connectors are CNC-machined parts and do not require mold-making.
However, each part needs to be fine-tuned on the CNC machine. Typically, a single sample costs $200.
This fee will be refunded after a 5K bulk order.
Guarantee
Brass RF connectors come with a one-year warranty.
Stainless steel connectors come with a three-year warranty.
The lifespan also depends on the contact material beryllium contacts offer better durability.
ROHS & REACH Compliance
Our products fully comply with ROHS & REACH regulations.
Does LENORF Offer Military-Grade Products?
Yes. We are honored to provide military-grade products with exceptionally stable quality.
MOQ (Minimum Order Quantity)
Regular connectors: 500 PCS
Adapters: 100 PCS
Military connectors: 100 PCS
Materials
Common materials include:
Body: Brass, stainless steel
Insulator: PTFE, PEEK
Contacts: Brass, phosphor bronze, beryllium copper
Other: Aluminum, titanium alloy
What’s the lifespan of an RF connector?
Connector durability is rated in mating cycles: General-purpose connectors (BNC, SMA): 500 cycles. Precision connectors (2.92 mm, 2.4 mm): 500 cycles or less. Rugged telecom connectors (N, 7/16 DIN): 500 cycles.
Can RF connectors be reused?
Yes, but performance degrades with wear. Precision connectors (used in test equipment) should be handled carefully—damage to threads or pins increases VSWR and insertion loss.
What’s the difference between threaded, bayonet, and push-on RF connectors?
Threaded (SMA, N, TNC): Secure, vibration-resistant. Bayonet (BNC): Quick connect/disconnect. Push-on (MCX, SMP): Ultra-fast, compact, used in high-density modules.
Are RF connectors interchangeable between brands?
Yes, if they follow the same standard (e.g., SMA-to-SMA). However, tolerances, plating, and dielectric quality vary — mixing low-quality and precision connectors can damage equipment.
