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Ultra-miniature Cryogenic cable

Ultra-miniature Cryogenic cable

CITCABLE provides professional provides various coaxial cables for high-frequency signals: ultra-miniature coaxial cables and semi-rigid coaxial with a stainless steel/  center conductor. We also offer the robust CryoCable, 

This series of high-performance wires primarily utilizes bare, tinned, silver-plated, or nickel-plated copper, pure silver, and specialized alloys as core conductors, which are then insulated with high-performance coatings such as specialized Polyimide (Kapton/PI/PEEK/PTFE/PFA/FEP). 

Ultra-miniature coaxial cable is used when a strong and flexible cable is needed. Type stranded copper alloy is recommended when low conductor resistance is a prime consideration. Type stranded copper alloy and type  stranded 304/316L stainless steel ,phosphor bronze,titanium  conductors、  are mechanically the most flexible due to their braided construction. Type Copper Alloy is recommended for use when both shielding and low thermal losses are important. See the technical specifications for the COPPER, S316L 304L , and phosphor bronze  titanium types.

  Cables classified as cryogenic are designed for use with cryogenic accelerometers in applications down to  -269 deg C, -196 deg C).   FOR ITER, EAST LHC ,UHV(TML, 0.8%, CVCM 0.1%

Product Overview

These Kapton (Polyimide) Wire Cables are designed and manufactured by CITCABLE as a range of high-quality PI insulated wires, ideal for use in UHV (Ultra High Vacuum), aerospace, medical, and nuclear applications. The Kapton insulation not only provides outstanding electrical performance but also ensures exceptional thermal stability (-100 °C to +300 °C) and superior radiation resistance, making the cable highly reliable for the most demanding environments. Furthermore, these cables exhibit low outgassing, high mechanical strength, and excellent chemical resistance, ensuring consistent safety and operational excellence in harsh conditions.

Wire Structure

The Kapton Wire Cable is designed with high-quality conductive cores and a specialized high-performance Polyimide (Kapton/PI) insulation. This construction helps maintain reliable electrical performance, ensures exceptional thermal and radiation resistance, and provides rugged durability to meet rigorous aerospace, medical, and UHV specifications.

PI(Kapton) Insulated Wire

Layer Material Function
Conductor Bare, Tinned, Silver-plated, or Nickel-plated Copper / Pure Silver / Alloy Maintains highly reliable electrical performance and delicate signal transmission
Insulation Layer Specialized high-performance Polyimide (Kapton/PI) Provides extreme temperature resistance (-100°C to +300°C), high breakdown voltage, and very low outgassing for UHV
Surface / Outer Layer Polyimide (PI) / TPI composite materials Offers superior radiation resistance, excellent wear performance, and protection against harsh chemicals and engine fluids

How Does Kapton (Polyimide) Insulation Enhance Cables?

Without Kapton Insulation (Standard Cable)

Standard materials → lower thermal/radiation resistance → potential failure in demanding environments

Common Limitations:

  • Becomes brittle when exposed to ionizing radiation
  • Inadequate performance in extreme temperatures and UHV (Ultra High Vacuum)
  • Higher outgassing rates and lower chemical resistance
 

With Kapton (Polyimide) Insulation

Exceptional thermal stability and radiation resistance

Engineering Advantages:

  • Withstands extreme operating temperatures from -100°C up to +300°C
  • Provides superior resistance to radiation, far outperforming standard PTFE or FEP
  • Features low outgassing and high dielectric strength, ideal for delicate signals in UHV and aerospace

Technical Specifications

Operating temperature: -100°C to +300°C
Voltage Rating: 250V to 10000V (Depending on insulation thickness)
Temperature Rating: Up to +300°C for Nickel-Plated Copper or Silver Conductors

Custom Cable Solutions

We provide customized anti-capillary wire cable solutions tailored to your specific application requirements, ensuring optimal performance for your machinery.

Customization Item Options
Conductor Size 0.35mm² - 6.0mm²
Insulation Material FKM / FEP / ETFE / XLPE / PVDF
Voltage Rating Customized according to requirement
Color Black, Red, Blue, or Custom colors
Cable Length Customized packaging / cut to length

Manufacturer Capability

With advanced cable extrusion equipment and strict quality control processes, we provide customized anti-capillary wire cable solutions for industrial OEM customers. Our capabilities include:

  • Custom conductor design
  • Processing of multiple high-performance insulation materials
  • Flexible support for small and large batch production
  • Customized cable marking and printing
  • OEM packaging services

Applications

  • UHV (Ultra High Vacuum) systems and chambers
  • Aerospace and aviation wiring
  • Nuclear power plant cabling
  • Medical equipment and delicate instruments
  • High-temperature sensors and probes
  • Radiation-prone industrial environments
  • Downhole drilling and oil & gas equipment

Quality Testing

Test Item Purpose
Oil Resistance Test Verify insulation durability under continuous fluid exposure
High Temperature Test Check thermal stability and prevent melting/degradation
Voltage Withstand Test Ensure electrical safety and prevent breakdown
Flexibility Test Evaluate mechanical performance in dynamic applications
Fluid Migration Test Verify the effectiveness of the anti-capillary structure

Frequently Asked Questions (FAQ)

Q1: What are the primary applications for Kapton (Polyimide) Wire Cables?

A: These cables are highly specialized for demanding environments such as UHV (Ultra High Vacuum) systems, aerospace components, medical devices, and nuclear applications due to their exceptional thermal stability and superior radiation resistance.

 

Q2: What are the main advantages of the Kapton (Polyimide) insulation used in these cables?

A: The specialized Kapton insulation provides extreme temperature resistance (spanning from -100°C up to +300°C), excellent dielectric strength, and rugged durability against chemicals and radiation. This ensures the cable remains highly reliable even in the harshest industrial conditions.

 

Q3: Why are Kapton wires particularly suited for UHV (Ultra High Vacuum) environments?

A: Kapton (Polyimide) exhibits extremely low outgassing properties. This means it will not release volatile materials or gasses that could compromise the vacuum chamber's integrity, making it the preferred choice for delicate UHV scientific and aerospace applications.

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