Semi-Rigid Coax Cable Assemblies

Published on 3/15/2026 • Updated on 3/15/2026

Sem-rigid Coax Cable Assembly to your specification

RF Cable Assemblies

Semi-rigid coax cable assemblies are widely used in RF and microwave systems where stable electrical performance, precise routing, and strong shielding are essential. These cables are ideal for high-frequency interconnects in aerospace, defense, telecom, radar, test equipment, and compact electronic modules.

Semi-Rigid Coax Cable Assemblies

SigmaRF offers a range of standard semi-rigid coax cable sizes to meet different mechanical and electrical requirements. Whether you need compact routing for dense assemblies or a larger cable for rugged, higher-power applications, our semi-rigid cable options provide dependable performance and repeatable signal integrity.

Available Semi-Rigid Coax Cable Sizes

  • 0.034 inch OD (0.86mm)
  • 0.043 inch OD (1.09mm)
  • 0.047 inch OD (1.19mm)
  • 0.0865 inch OD (2.20mm)
  • 0.090 inch OD (2.29mm)
  • 0.141 inch OD (3.58mm)
  • 0.250 inch OD (6.35mm)

Standard Semi-Rigid Coax Cable Assemblies

Our standard semi-rigid coax cable assemblies are built with high-quality conductors, PTFE dielectric, and seamless outer conductor tubing to support reliable RF transmission. These assemblies are suitable for both standard and custom cable build requirements.

0.141 inch OD (3.58mm)

  • Inner Conductor: 1.02mm Silver Plated Copper
  • Dielectric: 2.9mm PTFE
  • Outer Conductor: 3.58mm Seamless Copper Tube
  • Impedance: 50 ± 2 Ohm
  • Connector Options: Available on request

0.0865 inch OD (2.20mm)

  • Conductor: 0.51mm Silver Plated Copper Clad Steel
  • Dielectric: 1.68mm PTFE
  • Outer Conductor: 2.20mm Seamless Silver Plated Copper Tube
  • Impedance: 50 Ohm typical
  • Connector Options: Available on request

Connector Options to Select From

Popular RF Connector Choices

  • SMA: The default and most popular choice for general RF and microwave interconnects.
  • 2.92 mm: A preferred option when operating frequency needs to go higher.
  • SMP / SMPM: Popular in modules, radar, aerospace, and board-to-board blind-mate designs.
  • TNC / N: Popular when cable is larger and ruggedness or power matters more than compactness.

Why Choose Semi-Rigid Cable?

  • Excellent shielding and signal integrity
  • Stable mechanical routing after forming
  • Suitable for demanding RF and microwave systems
  • Available in multiple diameters and connector combinations
  • Ideal for standard and custom engineered assemblies

Quick Product Overview

Cable Type Outer Diameter Inner Conductor Dielectric Outer Conductor Impedance
Semi-Rigid Coax 0.141 inch (3.58mm) 1.02mm Silver Plated Copper 2.9mm PTFE 3.58mm Seamless Copper Tube 50 ± 2 Ohm
Semi-Rigid Coax 0.0865 inch (2.20mm) 0.51mm Silver Plated Copper Clad Steel 1.68mm PTFE 2.20mm Seamless Silver Plated Copper Tube 50 Ohm typical
Semi-Rigid Coax 0.250 inch (6.35mm) Available as per design PTFE Rigid outer tube construction 50 Ohm typical

If your application requires precision, low loss, and dependable connector performance, SigmaRF semi-rigid coax cable assemblies can be configured to match your exact project requirements. From compact high-frequency interconnects to rugged larger cable builds, we support both standard and customized cable assembly needs.

Need Custom Semi-Rigid Cable Assemblies?

Contact SigmaRF for standard or custom semi-rigid coax cable assemblies with connector options tailored to your RF and microwave application.

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