FM8255A

Overview

The Fairview Microwave FM8255A is a high-performance RF coaxial cable assembly designed for demanding signal transmission applications. It features a male SMA connector on one end and a female TNC connector on the other, facilitating versatile interconnect solutions in mixed-connector environments. The assembly utilizes semi-rigid or flexible low-loss dielectric materials to maintain signal integrity across a wide frequency range, typically up to 11 GHz for SMA and 6 GHz for TNC interfaces. Constructed with durable PTFE insulation and silver-plated copper conductors, it offers consistent impedance matching at 50 ohms. This configuration supports reliable data and RF power transfer in test, measurement, and communication systems where robust mechanical stability and minimal insertion loss are critical requirements.

Feature Summary

• Provides a direct interconnection between SMA and TNC connector standards
• Maintains stable 50-ohm characteristic impedance for signal fidelity
• Utilizes low-loss dielectric construction to minimize attenuation
• Features corrosion-resistant metal plating for long-term durability

Applications

• RF test and measurement instrumentation setups
• Wireless communication base station interconnects
• Military and aerospace avionics signal routing
• Laboratory equipment calibration links

Procurement Notes

Verify exact length specifications and connector gender orientation prior to purchase, as custom lengths may be available. Confirm frequency rating compatibility with your specific system requirements, noting that SMA and TNC connectors have different upper frequency limits. Ensure environmental conditions such as temperature and bending radius align with the cable's mechanical specifications. Request detailed datasheets from authorized distributors to validate material composition and performance metrics against your application needs.

Selection Notes

Select this assembly when transitioning between SMA and TNC ports is required without using adapters. Consider the operating frequency range; while SMA supports higher frequencies, the overall assembly performance is limited by the lower-rated TNC interface. Evaluate space constraints regarding cable flexibility and bend radius. For high-power applications, verify current handling capabilities and thermal dissipation characteristics of the specific conductor size used in this model.

Part Context

Fairview Microwave specializes in RF and microwave components, offering extensive catalogs of cable assemblies and connectors. The FM8255A belongs to their line of hybrid connector assemblies, addressing the need for seamless integration between different connector types commonly found in legacy and modern RF infrastructure. These products are engineered to meet stringent industry standards for signal integrity and mechanical reliability.

Replacement Considerations

Direct replacements should match the SMA-male to TNC-female configuration and similar electrical specifications. Verify that substitute cables maintain equivalent impedance and frequency ratings. Cross-reference part numbers from other manufacturers offering SMA-to-TNC assemblies, ensuring physical dimensions and mating force compatibility.