50Ω Semi-Flexible RF Coaxial Cable Series

50Ω semi-flexible RF coaxial cable is designed for RF modules, antenna systems, communication equipment, test instruments, and compact formed cable assemblies that require stable impedance, shielding, and better bendability than semi-rigid coax. This series uses PTFE insulation, tinned copper wire braid with tin-soaked shielding, and optional FEP or PE jacket structures, with multiple sizes available for different attenuation, voltage, and bending requirements.

50Ω Semi-Flexible Coax
PTFE Insulation
Tin-Soaked Braid Shield
FEP / PE Jacket Options

Overview

50Ω Semi-Flexible RF Coaxial Cable Series is designed for RF modules, antenna systems, communication equipment, test instruments, and compact formed cable assemblies that require stable RF performance with better bendability than semi-rigid coaxial cable.

Compared with semi-rigid coaxial cable, semi-flexible RF coaxial cable uses a tinned copper wire braid with tin-soaked outer conductor structure. This gives the cable better bendability and easier installation while still offering stable impedance, shielding, and formed routing performance for RF and microwave signal transmission.

This page is intended for product selection. Exact specifications should be confirmed by selected model, cable size, attenuation requirement, operating frequency, voltage rating, bending radius, jacket material, connector interface, and project drawing before ordering.

Series Options

The table below helps buyers compare the main 50Ω semi-flexible RF coaxial cable options before reviewing detailed datasheets or cable drawings.

Series Option	Product Positioning	Typical Selection Scenario
670-047/50	Small-size 50Ω semi-flexible RF coaxial cable	For compact RF connections requiring small diameter, shielding, and better bendability than semi-rigid cable.
670-086/50	Compact 50Ω semi-flexible RF coaxial cable	For RF modules, antenna leads, and test equipment where compact routing and moderate attenuation are required.
670-141/50	Medium-size 50Ω semi-flexible RF coaxial cable	For applications requiring lower attenuation, higher voltage options, and stable RF performance in formed assemblies.
670-176/50	Higher-voltage 50Ω semi-flexible RF coaxial cable option	For RF connections where voltage rating, cable size, and stable formed routing need to be balanced.
670-250/50	Larger 50Ω semi-flexible RF coaxial cable	For lower attenuation and higher voltage applications where larger cable diameter and bending radius are acceptable.
BYC Custom	Custom semi-flexible RF coaxial cable or cable assembly	For projects requiring custom jacket material, cable length, connector type, bend shape, attenuation target, RF testing, or documentation support.

Features

50Ω RF Transmission

Designed for 50Ω RF signal transmission in modules, antennas, communication systems, instruments, and compact electronic assemblies.

Semi-Flexible Construction

Provides better bendability and easier routing than semi-rigid coaxial cable while maintaining stable RF performance.

Tin-Soaked Braid Shield

The tinned copper wire braid with tin-soaked shielding structure supports shielding, formability, and stable cable geometry.

PTFE Insulation

PTFE insulation supports stable dielectric performance, controlled impedance, and RF signal transmission across the selected model range.

FEP or PE Jacket Options

Selected models support FEP or PE jacket options depending on temperature, abrasion, routing, and application requirements.

Custom RF Assembly Support

BYC Cables can review custom cable length, connector interface, bend forming, attenuation, RF testing, and documentation requirements.

Construction & Materials

Semi-flexible RF coaxial cable is different from both standard flexible coax and semi-rigid coax. It uses a braid-based outer conductor with tin-soaked reinforcement, making it more formable than semi-rigid copper tube cable while still suitable for stable RF routing after installation.

Construction Options

Component	Available Options	Selection Notes
Inner Conductor	Silver-plated copper wire or silver-plated copper-clad steel wire depending on selected model	Conductor selection affects conductivity, cable size, mechanical behavior, and RF performance.
Insulation	PTFE insulation	PTFE supports stable dielectric properties, controlled impedance, and reliable high-frequency performance.
Outer Conductor	Tinned copper wire braid with tin-soaked structure	Provides shielding, formability, and improved installation flexibility compared with semi-rigid tube construction.
Jacket	FEP, PE, or selected model-specific jacket options	FEP is suitable when higher temperature and surface durability are important. PE may be selected for certain routing or cost-sensitive applications.
Impedance	50Ω	Suitable for RF modules, antennas, instruments, and communication system interconnects.
Forming	Can be formed and routed for compact RF assemblies	Suitable for shaped installation. For frequent repeated motion, a fully flexible coaxial cable should be reviewed.
Connectorization	Connectorized RF cable assembly support can be reviewed	Connector type, cable length, bend shape, and RF testing should be confirmed by project drawing.

Construction Differences

Model	Construction Focus	Confirmed Dimensions	When to Choose
670-047/50	Small semi-flexible coax	Inner conductor OD 0.29±0.015mm; insulation OD 0.95±0.05mm; outer conductor OD 1.20±0.05mm.	Choose when small diameter and compact routing are more important than low attenuation.
670-086/50	Compact semi-flexible coax	Inner conductor OD 0.52±0.01mm; insulation OD 1.68±0.05mm; outer conductor OD 1.25±0.05mm or jacketed OD up to 2.50±0.10mm depending on version.	Choose for compact RF cable assemblies requiring practical bendability and stable 50Ω performance.
670-141/50	Medium semi-flexible coax	Inner conductor OD 0.94±0.02mm; insulation OD 2.98±0.05mm; outer conductor OD 3.58±0.01mm; jacketed OD up to 4.30±0.10mm depending on version.	Choose when lower attenuation, higher voltage options, and moderate cable size are required.
670-176/50	Higher-voltage semi-flexible coax option	Inner conductor OD 1.20±0.015mm; insulation OD 3.83±0.05mm; outer conductor OD 4.47±0.15mm; jacketed OD up to 5.20±0.20mm depending on version.	Choose when higher voltage rating or larger cable size is needed while keeping semi-flexible routing characteristics.
670-250/50	Larger semi-flexible coax	Inner conductor OD 1.65±0.02mm; insulation OD 5.25±0.12mm; outer conductor OD 6.15±0.15mm; jacketed OD up to 7.00±0.15mm depending on version.	Choose for lower attenuation and higher voltage applications where larger cable size is acceptable.

Specifications

The specifications below are intended for preliminary product selection. Final values should be confirmed according to selected model, jacket version, frequency, attenuation target, voltage rating, bend radius, connector type, and project standard.

Product Family	50Ω Semi-Flexible RF Coaxial Cable Series
Included Models	YZ670047/50, YZ670086/50, YZ670141/50, YZ670176/50, YZ670250/50
Impedance	50Ω
Insulation Material	PTFE
Outer Conductor	Tinned copper wire braid with tin-soaked structure
Jacket Options	FEP, PE, or model-specific jacket options depending on selected version
Capacitance	Typical listed values include 95 pF/m or 96 pF/m depending on selected model.
Velocity	Representative listed values include 69.5%, 70%, or 70.8% depending on selected model.
Operating Temperature	Common listed range: -55°C to +125°C (-67°F to +257°F). Selected versions may vary by jacket material and final construction.
Voltage Rating	Representative listed values include 300V, 500V, 2500V, and 3000V depending on selected model and version.
Minimum Static Bending Radius	Representative listed values include 4mm, 6mm, 8mm, 12mm, and 30mm depending on model and jacket version.
Attenuation	Varies by model, cable size, jacket version, and operating frequency. Representative attenuation data is listed below.
Customization	Available based on cable length, connector type, jacket material, bend shape, attenuation target, RF testing, and documentation requirements.

For accurate quotation, please provide the target model, operating frequency, attenuation target, voltage rating, jacket requirement, required bend radius, cable length, connector type, and applicable drawings or RF test specifications.

Representative Model Data

Model	Jacket / OD Reference	Voltage Rating	Min. Static Bend Radius
670-047/50	Outer conductor OD: 1.20±0.05mm; jacketed OD: 1.60±0.12mm	500V	4mm
670-086/50	Outer conductor OD: 1.25±0.05mm; jacketed OD up to 2.50±0.10mm depending on version	500V or model-specific value	4mm or 6mm depending on version
670-141/50	Outer conductor OD: 3.58±0.01mm; jacketed OD up to 4.30±0.10mm depending on version	2500V	8mm
670-176/50	Outer conductor OD: 4.47±0.15mm; jacketed OD up to 5.20±0.20mm depending on version	300V or 3000V depending on version	12mm
670-250/50	Outer conductor OD: 6.15±0.15mm; jacketed OD up to 7.00±0.15mm depending on version	3000V	30mm

Representative Attenuation Data

Model	Representative Attenuation Values	Selection Note
670-047/50	≤1.31dB/m @1GHz; ≤2.29dB/m @3GHz; ≤3.06dB/m @5GHz; ≤4.95dB/m @10GHz	Small-size option for compact RF routing where cable diameter is more important than lowest attenuation.
670-086/50	≤0.43dB/m @0.4GHz; ≤0.70dB/m @1GHz; ≤1.31dB/m @3GHz; ≤1.72dB/m @5GHz; ≤2.49dB/m @10GHz; ≤3.46dB/m @18GHz	Balanced compact option for RF modules, antenna leads, and formed cable assemblies.
670-141/50	≤0.25dB/m @0.4GHz; ≤0.41dB/m @1GHz; ≤0.76dB/m @3GHz; ≤1.02dB/m @5GHz	Medium-size option for lower attenuation and higher-voltage RF applications.
670-176/50	≤0.23dB/m @0.4GHz; ≤0.37dB/m @1GHz; ≤0.67dB/m @3GHz	Suitable when larger cable size and selected higher-voltage performance are required.
670-250/50	≤0.24dB/m @1GHz; ≤0.48dB/m @3GHz; ≤0.65dB/m @5GHz; ≤0.99dB/m @10GHz	Larger-size option for lower attenuation where bend radius and cable size are less restricted.

Applications

50Ω semi-flexible RF coaxial cables are suitable for RF and microwave systems requiring controlled impedance, shielding, formable routing, and better bendability than semi-rigid coaxial cable.

RF Modules

For internal RF module wiring where compact routing, shielding, and stable 50Ω impedance are required.

Antenna Systems

For antenna connections and RF equipment interconnects requiring formable coaxial cable routing.

Communication Equipment

For wireless, telecom, and high-frequency communication devices requiring stable RF signal transmission.

Test Instruments

For RF instruments, test fixtures, laboratory equipment, and measurement systems requiring repeatable cable routing.

Industrial Electronics

For industrial sensors, monitoring systems, control modules, and compact electronic assemblies.

Custom RF Assemblies

For cable assemblies requiring custom length, jacket material, connector type, bend shape, and RF testing.

Selection Guide

Use this guide as a starting point. Final selection should be confirmed by cable diameter, attenuation, voltage rating, jacket material, bending radius, connector type, and installation environment.

Requirement	Recommended Option	Selection Reason
Small semi-flexible RF routing	670-047/50	Recommended when compact size and short RF routing are more important than low attenuation.
Balanced compact RF cable	670-086/50	Provides a practical balance of size, bendability, attenuation, and RF performance.
Medium-size, higher-voltage option	670-141/50	Suitable when moderate size, lower attenuation, and higher voltage rating are needed.
Higher-voltage or larger routing	670-176/50	Useful when larger cable size and selected higher-voltage performance are required.
Lower attenuation and larger size	670-250/50	Recommended when low attenuation is more important than compact size or tight bend radius.
Custom RF cable assembly	BYC Custom	BYC Cables can review cable length, connector type, jacket material, bend shape, attenuation, and RF test needs.

Customization Options

BYC Cables can support custom semi-flexible RF coaxial cable and cable assembly requirements based on drawings, samples, RF performance targets, and project documentation needs.

Cable Size

670-047/50, 670-086/50, 670-141/50, 670-176/50, and 670-250/50 models can be selected according to routing space and attenuation requirements.

Jacket Material

FEP, PE, or model-specific jacket options can be reviewed based on temperature, abrasion, routing, and application environment.

Bend Shape

Custom routing and bend shapes can be reviewed for compact RF cable assemblies and formed installation requirements.

Connector Interface

Connector type, assembly length, and termination requirements can be reviewed according to equipment interface needs.

RF Performance

Attenuation, impedance, VSWR, voltage rating, operating frequency, and shielding requirements can be reviewed before production.

Testing and Documentation

Datasheets, RF test data, inspection records, and technical documents can be provided based on project requirements.

Request a Quote

Please provide the target model, operating frequency, attenuation target, voltage rating, jacket requirement, cable length, connector type, bend shape, and applicable drawings or RF test specifications.

FAQ

What is semi-flexible RF coaxial cable used for?

It is used for RF modules, antenna systems, communication equipment, test instruments, and compact cable assemblies that require stable 50Ω signal transmission with better bendability than semi-rigid coax.

What is the difference between semi-flexible and semi-rigid coaxial cable?

Semi-rigid coax uses a metal tube outer conductor and is more rigid after forming. Semi-flexible coax uses a braid-based tin-soaked outer conductor, making it easier to bend and route while still supporting stable RF performance.

Which models are included in this series?

This series includes YZ670047/50, YZ670086/50, YZ670141/50, YZ670176/50, and YZ670250/50.

What jacket options are available?

Selected models may support FEP, PE, or model-specific jacket options. Final jacket material should be confirmed by operating environment and project requirements.

Can semi-flexible coaxial cable be used for repeated movement?

It offers better bendability than semi-rigid coax and can support formed routing, but it is not the same as a fully flexible dynamic cable. If frequent movement is required, the application should be reviewed before selection.

Can BYC Cables provide custom semi-flexible RF cable assemblies?

Yes. BYC Cables can review custom cable length, connector type, jacket material, bend shape, attenuation, RF testing, and documentation requirements based on project drawings.