50Ω Semi-Rigid RF Coaxial Cable Series

50Ω semi-rigid RF coaxial cable is designed for RF modules, microwave circuits, test instruments, antenna systems, and formed cable assemblies where stable impedance, strong shielding, and controlled routing are required. This series uses silver-plated copper inner conductor, PTFE insulation, and seamless annealed copper tube outer conductor construction, with multiple sizes available for different attenuation, power, and bending radius requirements.

50Ω Semi-Rigid Coax
PTFE Insulation
Copper Tube Shield
Formed RF Assemblies

Overview

50Ω Semi-Rigid RF Coaxial Cable Series is designed for RF modules, microwave circuits, test instruments, antenna systems, and formed cable assemblies requiring stable impedance, strong shielding, and precise cable routing.

Compared with flexible braided coaxial cable, semi-rigid RF coax uses a seamless metal tube outer conductor structure. This helps improve shielding performance, mechanical stability, and RF consistency after forming. It is suitable for applications where the cable route is shaped during assembly and does not need frequent repeated flexing during service.

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

Series Options

The table below helps buyers compare available 50Ω semi-rigid RF coaxial cable models before reviewing detailed datasheets or cable drawings.

Series Option	Product Positioning	Typical Selection Scenario
680-034/50	Ultra-small 50Ω semi-rigid RF coaxial cable	For compact RF circuits and miniature formed cable assemblies where very small diameter and tight routing are required.
680-086/50	Small-size 50Ω semi-rigid RF coaxial cable	For RF modules, antenna connections, and test equipment requiring a balance of compact size and lower attenuation.
680-141/50	Medium-size 50Ω semi-rigid RF coaxial cable	For RF interconnects requiring improved power handling and lower attenuation than smaller semi-rigid options.
680-250/50	Larger 50Ω semi-rigid RF coaxial cable	For lower-loss RF transmission and higher representative power handling where larger cable diameter is acceptable.
BYC Custom	Custom semi-rigid RF coaxial cable or formed cable assembly	For projects requiring custom cable length, bend forming, connector type, attenuation target, material review, RF testing, or documentation support.

Features

50Ω RF Transmission

Designed for 50Ω RF and microwave signal transmission in modules, instruments, antennas, and communication equipment.

Semi-Rigid Tube Construction

Seamless annealed copper tube outer conductor provides strong shielding, mechanical stability, and consistent formed routing.

PTFE Insulation

PTFE insulation supports stable dielectric performance, high-frequency signal transmission, and reliable operating temperature performance.

Low VSWR Options

Selected models list standing wave ratio values up to 10GHz, supporting RF applications where signal reflection control is important.

Multiple Cable Sizes

Available in 680-034/50, 680-086/50, 680-141/50, and 680-250/50 sizes to match routing, attenuation, power, and bending requirements.

Custom Formed Assemblies

BYC Cables can review bend forming, cable length, connector interface, RF testing, and documentation requirements based on project drawings.

Construction & Materials

Semi-rigid RF coaxial cable uses a solid metal tube outer conductor rather than a flexible braided shield. This construction is well suited for RF assemblies that need stable routing, strong shielding, and precise formed shapes 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, RF performance, mechanical behavior, and cable size.
Insulation	PTFE insulation	PTFE supports stable dielectric performance and reliable RF transmission across the listed model range.
Outer Conductor	Seamless annealed bare copper tube or alloy-plated seamless annealed bare copper tube depending on selected model	The tube outer conductor provides shielding, mechanical stability, and formed cable routing capability.
Impedance	50Ω	Suitable for standard RF power, microwave, antenna, module, and instrument interconnect applications.
Forming	Can be formed according to assembly routing requirements	Semi-rigid cable is intended for shaped installation, not frequent repeated flexing like flexible coaxial cable.
Connectorization	Connectorized cable assembly support can be reviewed	Connector type, cable length, bend shape, and RF test requirements should be confirmed by project drawing.

Construction Differences

Model	Construction Focus	Confirmed Dimensions	When to Choose
680-034/50	Ultra-miniature semi-rigid coax	Inner conductor OD 0.20±0.01mm; insulation OD 0.65±0.01mm; outer conductor OD 0.88±0.05mm.	Choose when very small diameter and tight RF routing are more important than low attenuation.
680-086/50	Small-size semi-rigid coax	Inner conductor OD 0.52±0.01mm; insulation OD 1.68±0.05mm; outer conductor OD 2.20±0.05mm.	Choose for compact RF cable assemblies requiring a practical balance of size, attenuation, and power handling.
680-141/50	Medium-size semi-rigid coax	Inner conductor OD 0.92±0.02mm; insulation OD 2.98±0.05mm; outer conductor OD 3.58±0.05mm.	Choose when lower attenuation and higher representative power handling are needed than smaller semi-rigid models.
680-250/50	Larger semi-rigid coax	Inner conductor OD 1.65±0.02mm; insulation OD 5.31±0.05mm; outer conductor OD 6.35±0.05mm.	Choose for lower-loss RF transmission where larger diameter and larger bending radius are acceptable.

Specifications

The specifications below are intended for preliminary product selection. Final values should be confirmed according to selected model, frequency, attenuation target, power requirement, bend forming, connector type, and project standard.

Product Family	50Ω Semi-Rigid RF Coaxial Cable Series
Included Models	YZ680034/50, YZ680086/50, YZ680141/50, YZ680250/50
Impedance	50Ω
Insulation Material	PTFE
Outer Conductor	Seamless annealed bare copper tube or alloy-plated seamless annealed bare copper tube depending on selected model
Capacitance	95 pF/m, representative listed value
Operating Temperature	-55°C to +125°C (-67°F to +257°F)
Minimum Static Bending Radius	3.00mm, 7.63mm, 12.50mm, or 22.23mm depending on selected model
Attenuation	Varies by model and operating frequency. Representative attenuation data is listed below.
Average Power	Varies by model and frequency. Representative average power data can be reviewed according to selected cable size.
Storage Period	2 months, as listed in the product table
Customization	Available based on cable length, bending shape, connector type, RF performance target, testing, and documentation requirements

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

Representative Model Data

Type	P/N	Outer Conductor OD	VSWR	Min. Bend Radius	Operating Temperature
680-034/50	YZ680034/50	0.88±0.05mm	≤1.15 @ 0–10GHz	3.00mm	-55°C to +125°C (-67°F to +257°F)
680-086/50	YZ680086/50	2.20±0.05mm	≤1.15 @ 0–10GHz	7.63mm	-55°C to +125°C (-67°F to +257°F)
680-141/50	YZ680141/50	3.58±0.05mm	≤1.15 @ 0–10GHz	12.50mm	-55°C to +125°C (-67°F to +257°F)
680-250/50	YZ680250/50	6.35±0.05mm	Model-specific value should be confirmed	22.23mm	-55°C to +125°C (-67°F to +257°F)

Representative Attenuation Data

Model	0.5GHz	1GHz	5GHz	10GHz	20GHz
680-034/50	≤1.27dB/m	≤1.83dB/m	≤4.58dB/m	≤6.83dB/m	–
680-086/50	≤0.45dB/m	≤0.64dB/m	≤1.51dB/m	≤2.22dB/m	≤3.29dB/m
680-141/50	≤0.26dB/m	≤0.38dB/m	≤0.91dB/m	≤1.37dB/m	≤2.09dB/m
680-250/50	≤0.16dB/m	≤0.25dB/m	≤0.64dB/m	≤0.98dB/m	–

Representative Average Power Data

Model	0.5GHz	1GHz	5GHz	10GHz	20GHz
680-034/50	35.7	25.2	11.1	7.7	–
680-086/50	232	162.4	69.8	47.9	32.6
680-141/50	600.5	417.5	174.4	117.5	77.9
680-250/50	1332.1	914.6	364.4	238.2	–

Applications

50Ω semi-rigid RF coaxial cables are suitable for RF and microwave systems that require stable formed routing, strong shielding, controlled impedance, and reliable high-frequency signal transmission.

RF Modules

For internal RF module connections requiring compact routing, stable impedance, and shaped cable installation.

Microwave Circuits

For microwave circuit interconnects where low attenuation, shielding, and formed routing stability are important.

Antenna Systems

For antenna feeds and RF equipment connections requiring 50Ω semi-rigid coaxial cable performance.

Test Instruments

For RF test equipment, laboratory fixtures, and measurement systems requiring stable cable geometry.

Aerospace and Defense Electronics

For selected high-reliability RF systems requiring formed cable routing and strong shielding performance.

Custom Formed RF Assemblies

For cable assemblies requiring custom bend shapes, connector interfaces, and RF test confirmation.

Selection Guide

Use this guide as a starting point. Final selection should be confirmed by cable diameter, attenuation, operating frequency, bending radius, power requirement, connector type, and installation space.

Requirement	Recommended Option	Selection Reason
Smallest semi-rigid coax option	680-034/50	Recommended when compact routing and ultra-small cable diameter are the primary selection factors.
Balanced size and RF performance	680-086/50	Provides a practical balance between small size, attenuation, bending radius, and representative power handling.
Lower attenuation with medium size	680-141/50	Suitable when lower attenuation and higher representative power handling are needed while keeping cable size moderate.
Lowest listed attenuation	680-250/50	Recommended when lower attenuation is more important than compact diameter or tight bend radius.
Formed RF cable assembly	BYC Custom	BYC Cables can review bend shape, cable length, connector type, RF testing, and assembly documentation.

Customization Options

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

Cable Size

680-034/50, 680-086/50, 680-141/50, and 680-250/50 models can be selected according to routing space and attenuation requirements.

Bend Forming

Custom bend shape and routing geometry can be reviewed for formed RF assemblies based on project drawings.

Connector Interface

Connector type and assembly method can be reviewed according to equipment interface and RF testing requirements.

RF Performance

Attenuation, VSWR, average power, impedance, and operating frequency requirements can be reviewed before production.

Length and Packaging

Cable length, formed assembly packaging, and handling requirements can be customized according to delivery needs.

Testing and Documentation

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

Request a Quote

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

FAQ

What is semi-rigid RF coaxial cable used for?

It is used for RF modules, microwave circuits, antenna systems, test instruments, and formed cable assemblies where stable impedance, strong shielding, and controlled routing are required.

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

Semi-rigid coaxial cable uses a seamless metal tube outer conductor and is usually formed into a fixed shape during assembly. Flexible coaxial cable uses braided shielding and is better for repeated movement or flexible routing.

Which models are included in this series?

This series includes YZ680034/50, YZ680086/50, YZ680141/50, and YZ680250/50, all designed as 50Ω semi-rigid RF coaxial cable options.

What operating temperature is available?

The listed operating temperature range is -55°C to +125°C (-67°F to +257°F).

Can semi-rigid coaxial cable be bent repeatedly?

It can be formed to a required shape, but it is not intended for frequent repeated flexing. If repeated movement is required, a flexible or semi-flexible coaxial cable may be more suitable.

Can BYC Cables provide custom formed semi-rigid cable assemblies?

Yes. BYC Cables can review custom bend shape, cable length, connector type, attenuation, VSWR, average power, testing, and documentation requirements based on drawings.