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Miniature Cable Manufacturer for Precision Electronic Applications
Miniature cables are essential components in modern electronic systems where space is limited, flexibility is required, and reliable signal or power transmission must be maintained. As electronic devices become smaller and more complex, engineers increasingly rely on miniature cable solutions that provide high performance in compact environments.
Who We Are
As an experienced miniature cable manufacturer, Casmo Cable design and produce a wide range of small diameter cables, micro coaxial cables, and ultra flexible miniature cables for demanding industries such as medical devices, robotics, aerospace electronics, and precision instrumentation.
We provide both standard miniature cable configurations and fully customized cable solutions to support equipment manufacturers, system integrators, and cable assembly companies worldwide.
Our miniature cable solutions combine compact cable structures, high-performance insulation materials, and advanced shielding designs to ensure stable electrical performance even in harsh environments. Whether your project requires a custom miniature cable for high-frequency signals or a durable micro cable for continuous motion applications, our engineering team can help you select the most suitable cable structure.
What is a Miniature Cable?
A miniature cable refers to a small-diameter electrical cable specifically designed for applications where compact size, lightweight construction, and high flexibility are critical.
Compared with conventional cables, miniature cables feature significantly smaller outer diameters while still maintaining reliable electrical and mechanical performance. This allows engineers to route cables through tight spaces and integrate them into compact electronic assemblies without compromising system reliability.
- Typical characteristics of miniature cables include:
- Small outer diameter (often between 0.5 mm and 6 mm)
- Lightweight cable structure
- High flexibility for dynamic applications
- Reliable signal or power transmission
- Optional shielding for EMI protection
Miniature cables are commonly used in industries where equipment miniaturization and high performance are essential. These cables support applications ranging from medical imaging systems and surgical equipment to robotic automation systems and aerospace electronics.
Because each application environment is different, many projects require custom miniature cable designs that consider electrical performance, temperature resistance, mechanical durability, and installation constraints.
How to Choose the Right Miniature Cable
Selecting the right miniature cable for a specific application requires careful evaluation of several factors. Important considerations include:

Required cable diameter

Signal type and voltage rating

Temperature range

Flexibility requirements

Installation environment

Shielding requirements
Engineers should consider both electrical and mechanical factors to ensure optimal cable performance.
If you are unsure which miniature cable design is suitable for your application, our technical team can assist with cable selection and design recommendations.
Types of Miniature Cables We Supply
Different applications require different cable structures. As a professional miniature cable supplier, we provide several types of miniature cables designed for specific electrical and mechanical requirements.
Miniature Coaxial Cable
Miniature coaxial cables are designed for high-frequency signal transmission and applications where signal integrity is critical. These cables feature a central conductor surrounded by insulation, shielding, and an outer jacket.
Typical applications include:
- medical imaging systems
- RF communication equipment
- aerospace electronics
- testing and measurement devices
Miniature coax cables offer excellent EMI shielding performance and stable signal transmission, making them ideal for sensitive electronic systems.
Ultra Flexible Miniature Cable
Ultra flexible miniature cables are specifically engineered for dynamic motion environments where cables must bend repeatedly without failure.
Typical applications include:
- robotic arms
- automated production systems
- motion control equipment
- surgical robots
By using specialized conductor stranding and flexible insulation materials, these cables provide extended flex life performance for continuous motion applications.
Shielded Miniature Cable
Shielded miniature cables include braided or foil shielding to protect signals from electromagnetic interference (EMI).
They are commonly used in:
- precision measurement systems
- industrial automation equipment
- aerospace electronics
- medical diagnostic devices
Shielded miniature cables ensure stable signal transmission even in electrically noisy environments.
Miniature Multi-Core Cable
Miniature multi-core cables contain multiple conductors within a compact cable structure. They are widely used in applications where several signals or power lines must be routed through limited space.
Typical applications include:
- sensor systems
- industrial instrumentation
- medical monitoring equipment
- automation control systems
These cables allow equipment designers to simplify internal wiring while maintaining reliable electrical performance.
Miniature Thermoplastics-Insulated Cables for Continuous Motion
Designed for ultra-compact dynamic applications, miniature thermoplastics-insulated cables deliver an optimal balance of extreme flexibility, mechanical strength, and long bending life in confined spaces. These ultra-fine miniature cables are widely used in medical robotics, endoscopic articulation, micro-actuators, and precision automation systems where continuous micro-flexing and tight bend radii are unavoidable. Carefully formulated TPE and modified PVC compounds ensure stable performance under constant mechanical stress in AWG 36–56 miniature formats.

CASPLAST™ 1015
Reliable PVC insulated wire, rated 600V and -30°C to +105°C, ideal for general-purpose power and control applications.

CASPLAST™ 1007
Flexible PVC cable, 300V, -20°C to +80°C, suitable for low-voltage wiring in industrial environments.

CASPLAST™ 1032
High-voltage PVC wire, 1000–1200V, -30°C to +90°C, perfect for indoor machinery and high-current circuits.

CASPLAST™ 1056
Durable 600V PVC insulated wire, -30°C to +105°C, for reliable power distribution and control wiring.

CASPLAST™ 1095
PVC wire rated 300V, -30°C to +80°C, ideal for signal and control circuits in standard industrial settings.

CASPLAST™ 1569
Flexible PVC insulated cable, 300V, -30°C to +105°C, designed for versatile industrial installation needs.

CASPLAST™ 2103
Long-lasting PVC wire, 300V, -30°C to +105°C, engineered for stable electrical connections and automation systems.

CASPLAST™ 2651
High-temperature PVC insulated wire, 300V, rated up to +150°C, suitable for elevated thermal environments and demanding applications.
Key Advantages of Miniature Cables
Miniature cables provide several advantages compared with standard cable designs. These benefits make them ideal for advanced electronic systems that require high performance in compact spaces.
Compact Cable Design
Miniature cables allow engineers to route wiring through tight spaces inside complex electronic assemblies. Their small diameter makes them ideal for high-density electronic systems.
Lightweight Construction
Reducing cable weight is important in applications such as aerospace systems, portable medical devices, and robotics. Miniature cables provide reliable performance without adding unnecessary weight.
High Flexibility
Many miniature cables are designed for flexible installation or dynamic motion applications. Flexible conductor structures and specialized insulation materials improve durability during repeated bending.
Reliable Signal Transmission
With proper shielding and cable design, miniature cables can maintain excellent signal integrity even in challenging environments.
Custom Cable Design
Because each project may have unique technical requirements, miniature cables can be customized to meet specific electrical and mechanical specifications.
Technical Specifications
Although miniature cables vary depending on design and application requirements, typical specifications include the following parameters.
Parameter | Typical Range |
|---|---|
Cable Diameter | AWG 36-56 (0.0125-0.127mm core) |
Conductor Material | Copper / Silver-plated Copper |
Insulation Materials | PTFE / FEP / ETFE / PVC |
Temperature Range | -40°C to 200°C |
Voltage Rating | Up to 600V |
Shielding | Braided / Foil / Double Shield |
Custom specifications are available depending on application requirements.Engineers selecting a miniature cable should evaluate several factors, including cable diameter, flexibility requirements, operating temperature, signal type, and installation environment.
Miniature Fluoropolymer-Insulated Cables for High-Performance Robotics
Miniature fluoropolymer-insulated cables are engineered for precision applications where standard micro-wires reach their limits. With extremely low friction, superior chemical resistance, and outstanding thermal stability, these ultra-thin miniature cables excel in high-speed, multi-axis robotic joints, surgical robots, and compact drone systems. They significantly reduce wear inside micro-drag chains and moving assemblies, dramatically extending service life in demanding miniature robotic environments.

CASFLON™ 150 – Style 11063
PFA-insulated wire rated 600V, -65°C to +150°C, ideal for high-flex robotic and automation wiring.

CASFLON™ 150 – Style 1164
PTFE-insulated wire, 300V, flexible and durable for continuous-motion robotic systems.

CASFLON™ 150 – Style 1198
PTFE-insulated 600V wire, designed for repeated bending and high-temperature robotics applications.

CASFLON™ 150 – Style 1331
FEP-insulated wire, 600V, suitable for robotic arms and moving industrial machinery.

CASFLON™ 200 – Style 10133
PTFE-insulated wire rated up to 200°C, ideal for high-temperature robotic components.

CASFLON™ 150 – Style 1859
PFA-insulated 600V wire, engineered for long-term reliability under high flex cycles.

CASFLON™ NEMA HP4 – Type K
FEP-insulated 600V wire, designed for robotic control systems requiring high durability.

CASFLON™ SAE AS22759 / 16
ETFE-insulated 600V wire, built for vibration-intensive automated machinery and continuous motion.
Materials and Insulation Options
Material selection plays an important role in miniature cable performance. Different insulation materials provide different levels of temperature resistance, chemical resistance, and flexibility.
PTFE Insulation
PTFE insulation provides excellent high temperature resistance and chemical stability. It is commonly used in aerospace and high-performance electronic applications.
FEP Insulation
FEP insulation offers good electrical performance and high temperature resistance while remaining relatively flexible. It is widely used in medical equipment and instrumentation.
ETFE Insulation
ETFE insulation provides strong mechanical properties and resistance to harsh environments. It is often used in industrial equipment and aerospace systems.
PVC Insulation
PVC insulation is commonly used for general applications where moderate temperature resistance and cost efficiency are required.
Miniature Coaxial Cables for High-Frequency and Compact Applications
Our CASTHERMCOAX™ miniature coaxial cables deliver high-frequency performance in space-constrained environments. With ultra-compact conductors, precise shielding, and mechanical durability, they withstand continuous flexing and tight bends, ensuring signal integrity in medical devices, robotics, aerospace, and precision instrumentation applications. Available in RG142–RG393 standards.

CASTHERMCOAX™ RG142 U
High-performance miniature coaxial cable offering reliable high-frequency signal transmission, excellent shielding, and compact design for aerospace and industrial applications.

CASTHERMCOAX™ RG178
Ultra-thin coaxial cable designed for precision electronic systems, providing stable high-frequency performance in tight spaces and demanding environments.

CASTHERMCOAX™ RG179 D
Flexible miniature coaxial cable with double shielding, ideal for high-frequency signal integrity in instrumentation and aerospace applications.

CASTHERMCOAX™ RG179 U
Compact single conductor coaxial cable delivering superior high-frequency performance and robust EMI protection for medical, industrial, and defense electronics.

CASTHERMCOAX™ RG304 U
Lightweight miniature coaxial cable suitable for long runs and compact installations, offering excellent shielding and stable electrical performance.

CASTHERMCOAX™ RG316 U
Precision coaxial cable with durable insulation, optimized for high-frequency applications in robotics, aerospace, and instrumentation systems.

CASTHERMCOAX™ RG316 U/FEP
FEP-insulated miniature coaxial cable providing high-temperature resistance, superior flexibility, and reliable high-frequency signal transmission.

CASTHERMCOAX™ RG393 U
Robust miniature coaxial cable engineered for demanding industrial and aerospace applications, ensuring consistent high-frequency performance and EMI shielding.
Applications Across Industries
Miniature cables are widely used in industries that require compact cable solutions and reliable electrical performance.
Medical Devices
Medical equipment often contains complex electronic systems in very limited space. Miniature cables are used in diagnostic equipment, imaging systems, and surgical devices where reliability is critical.
Robotics and Automation
Robotic systems require flexible cables that can withstand continuous motion. Ultra flexible miniature cables are commonly used in robotic arms and automated production equipment.
Aerospace Electronics
Aircraft and aerospace systems require lightweight wiring solutions that meet strict reliability standards. Miniature cables help reduce weight while maintaining electrical performance.
Industrial Sensors and Instrumentation
Industrial monitoring systems rely on miniature signal cables to transmit accurate data from sensors and measurement devices.
Custom Miniature Cable Solutions
Many projects require cable designs that differ from standard catalog products. As a manufacturer, we provide custom miniature cable solutions to meet specific project requirements.
Customization options include:
- custom conductor sizes
- special insulation materials
- high temperature cable design
- custom shielding structures
- special outer jacket materials
- small batch production for prototype projects
Our engineering team works closely with customers to understand application requirements and recommend suitable cable structures.
Manufacturing Capability for Miniature Cables
Producing high-quality miniature cables requires precise manufacturing processes and strict quality control.
Our manufacturing capabilities include:
- precision conductor stranding
- advanced cable extrusion lines
- shielding and braiding equipment
- strict process control systems
These manufacturing capabilities allow us to produce consistent cable structures that meet demanding technical requirements.
Quality Control and Testing
To ensure long-term reliability, miniature cables must undergo rigorous testing during production.
Typical testing procedures include:
- electrical performance testing
- insulation resistance testing
- conductor resistance measurement
- mechanical durability testing
- environmental resistance testing
Strict quality control ensures that each cable meets the required electrical and mechanical specifications.
International Standards Compliance
Our miniature cables meet major international standards for smooth certification and integration into global precision projects (ISO 10993, UL, RoHS, REACH, SAE AS22759, NEMA HP4, etc.).
UL & cUL
Our robotic cables are manufactured in compliance with UL and cUL requirements, ensuring electrical safety, mechanical reliability, and acceptance for North American industrial installations.
IEC standards
Designed and tested according to relevant IEC standards, our cables deliver stable performance under continuous motion, bending, and torsion in demanding industrial environments.
ISO certified materials
All insulation and jacket materials are sourced and processed under ISO-certified quality management systems, guaranteeing consistency, traceability, and long-term durability.
RoHS & halogen-free options
RoHS-compliant and halogen-free cable options are available to meet environmental regulations, reduce toxic emissions, and improve safety in enclosed automation systems.
Frequently Asked Questions
Common questions about miniature cable and precision solutions
Medical endoscopes and implants typically use ultra-fine miniature coaxial cables or multi-conductor shielded cables in AWG 44–56 range. These feature biocompatible fluoropolymer insulation (PFA, FEP, or medical-grade silicone), high shielding coverage (>90%) for low-noise signal transmission, and extremely small outer diameters (<0.5 mm) to fit tight spaces. They must meet ISO 10993 biocompatibility and withstand repeated sterilization cycles.
The primary causes are cumulative mechanical fatigue from millions of bend/torsion cycles, insulation cracking due to thermal cycling or low temperatures, jacket abrasion from repeated movement or chemical exposure, and signal degradation from micro-vibration or EMI. Conductor strand breakage is common when standard stranding is used instead of high-flex optimized designs.
Yes — significantly. Medical-grade versions require ISO 10993 biocompatibility, sterilizability (autoclave, EtO, gamma >500 cycles), ultra-low outgassing, non-toxic materials, and tighter tolerances for patient safety. Industrial cables prioritize cost and general durability but often lack these certifications, making them unsuitable for direct body contact or clean-room use.
High-quality miniature cables designed for dynamic applications can achieve 10–20 million+ bend cycles (depending on bend radius, temperature, and load), often exceeding 20 years of service life in real-world use. This is validated through third-party flex-life testing (e.g., rolling flex or tic-tac-toe protocols). Standard wires typically fail below 1 million cycles in similar conditions.
Yes. Many projects require customized cable designs including conductor size, insulation material, shielding structure, and outer jacket.
During OEM design, emphasis is on electrical performance (impedance control, low capacitance), mechanical specs (bend radius, flex life), and prototyping flexibility (small MOQ, quick samples). In final assembly, focus shifts to manufacturability (consistent tolerances, ease of termination), supply chain reliability, cost optimization at scale, and full certification traceability for regulatory approval.
Key factors include: existing space constraints (diameter & bend radius), required flex life vs. current failure rate, compatibility with existing connectors/termination, environmental conditions (temperature, chemicals, sterilization), certification needs (e.g., ISO 10993 retrofit), signal integrity improvements (shielding upgrade), and total lifecycle cost (reduced maintenance vs. initial price).
Yes. Miniature coaxial cables are specifically designed for high-frequency signal transmission and provide excellent shielding performance.
Risks include early conductor breakage from insufficient flex life, signal noise or loss due to poor shielding, insulation failure in cold/sterile environments, non-compliance with medical/aerospace certifications (leading to regulatory rejection), increased rework/scrap, patient/device safety issues (in medical use), and higher long-term maintenance costs from frequent replacements.
By providing 10–20 million+ cycle durability, biocompatibility & sterilizability, and optimized signal integrity, high-quality miniature cables drastically cut field failures, extend device lifespan, reduce warranty claims, minimize production rework during assembly, lower spare parts inventory needs, and decrease overall maintenance frequency — delivering significant ROI through fewer service interventions and longer operational uptime.
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