0.087" Semi-Rigid Coax Cable 50 Ohm UT‑085 Alternative 40 GHz Semi-Rigid Test Cable

SR‑086 semi‑rigid coaxial cable is a 0.086" diameter, 50‑ohm, high‑performance microwave cable designed for precision RF assemblies and test setups where stable electrical performance and controlled routing are critical. Built with a solid silver‑plated copper‑clad steel center conductor, PTFE dielectric, and copper tube outer conductor, SR‑086 delivers low loss and excellent shielding over a wide frequency range up to 40 GHz, making it an ideal upgrade or drop‑in alternative to UT‑085 semi-rigid cables in many designs. Its semi‑rigid construction allows accurate, repeatable forming to tight bend radii while maintaining impedance control, which is essential for high‑density RF modules, instrumentation, and aerospace or defense systems. Use SR‑086 semi‑rigid cable when you need consistent phase performance, excellent VSWR, and robust mechanical stability in demanding environments, from lab test benches to volume production assemblies.

• 50‑ohm semi‑rigid construction for precision RF and microwave applications, compatible with common UT‑085 footprints and assembly practices.

• 0.087" (≈2.19 mm) nominal outer diameter for compact routing in high‑density modules and tight enclosures.

• Solid silver‑plated copper‑clad steel center conductor for low loss, high power handling, and excellent long‑term stability.

• PTFE dielectric with 70% velocity of propagation for predictable electrical length and phase control.

• Copper tube outer conductor (Copper, silver plated copper or tinned copper depending on variant) providing high shielding effectiveness and easy solderability to connectors and housings.

• Wide operating frequency range up to 40–50+ GHz (variant dependent), supporting modern broadband, radar, and high‑speed digital applications.

• Wide operating temperature range (typically −55 °C to +125 °C or higher), suitable for harsh environmental conditions.

• Tight minimum bend radius (around 0.05–0.07 in / 1.27–1.78 mm for formed sections) enabling compact pre‑formed cable routes without compromising performance.

• RoHS‑compliant materials to support global regulatory and environmental requirements.

• RF and microwave cable assemblies up to 40 GHz for communication systems, radar, and test instrumentation.

• Pre‑formed semi‑rigid assemblies for OEM production, ensuring consistent fit, layout, and repeatable electrical performance in modules and sub‑systems.

• Precision test port jumpers and interconnects for VNAs, spectrum analyzers, and other RF test equipment where low loss and phase stability are critical.

• High‑density RF boards, microwave modules, and hybrid circuits where controlled routing and excellent shielding are required.

• Aerospace, defense, and industrial systems exposed to vibration, thermal cycling, or vacuum environments, where semi‑rigid cables offer superior mechanical integrity versus flexible cables.

A: In most cases, yes: SR‑086 shares the same 0.086" nominal diameter, 50‑ohm impedance, and similar construction, making it suitable as an alternative or replacement for UT‑085 style semi‑rigid cables in many designs. Always verify exact mechanical tolerances, plating, and frequency requirements against your existing UT‑085 specification before direct substitution.

A: Typical SR‑086 style semi‑rigid cables operate up to 40 GHz, with some low‑loss variants rated to 50–62 GHz depending on dielectric and conductor details. For best performance, confirm the rated maximum frequency in the specific product datasheet you are using.

A: For permanent formed bends, the minimum inside bend radius is typically around 0.05–0.07 inches (1.27–1.78 mm), depending on the exact SR‑086 variant and outer conductor material. Bending below the recommended radius can damage the dielectric or deform the outer conductor, leading to impedance changes and higher VSWR.

A: SR‑086 designs commonly use a solid silver‑plated copper‑clad steel inner conductor, PTFE dielectric, and a copper or silver plated copper or tinned copper outer conductor. This combination offers low loss, good power handling, excellent solderability, and robust mechanical performance across a wide temperature range.

A: Yes, SR‑086 semi‑rigid cables offer good continuous‑wave power handling, with representative .086 semi‑rigid designs handling on the order of hundreds of watts at 1 GHz under proper cooling and VSWR conditions. Actual power rating depends on frequency, ambient temperature, and installation, so always consult the product datasheet and apply appropriate derating.

A: Engineers can hand‑form SR‑086 with appropriate bending tools, formers, or fixtures to maintain the recommended minimum radius and avoid kinks. For repeatable production, pre‑formed assemblies based on your drawing are recommended to ensure consistent routing and electrical performance.

A: Compared with flexible coax, SR‑086 semi‑rigid provides better shielding, more stable impedance, lower phase variation, and more repeatable routing once formed. Flexible cables are easier to install and move but are less stable in environments where mechanical movement or temperature cycles are significant.

A: Most modern SR‑086 semi‑rigid cable variants are designed to be RoHS compliant, using lead‑free materials and finishes. Check the compliance statement or certificate for the specific part number you intend to purchase.

A: To quote or order SR‑086 assemblies, buyers should specify length, connector types and genders, required frequency range, plating or finish, and any special forming or layout requirements. Sharing drawings or 3D models for pre‑formed assemblies helps ensure accurate manufacturing and faster delivery.

A: Yes, SR‑086 semi‑rigid cable is commonly supplied as custom‑length or pre‑formed assemblies tailored to your mechanical drawing and RF requirements. This reduces installation time, improves repeatability, and minimizes the risk of field bending errors.