125 Series Coaxial Cables:

Engineered for Excellence Up to 70 GHz

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The 125 Series from Insulated Wires Inc. sets a new benchmark for coaxial cable performance, pushing the limits with operation capabilities up to 70 GHz by employing mixed dielectric construction. Designed for those who demand the highest quality and precision, the 125 Series is your go-to solution for advanced technical applications requiring small diameter and exceptional attenuation.

Key Features

  • High-Quality Materials: With a silver-plated copper center conductor, mixed Teflon dielectric, and dual layers of silver-plated copper for both foil and braid, these cables are built for optimal signal integrity.
  • Robust Design: The outer jacket is made of FEP, measuring 0.099 inches (2.51mm) in diameter, offering durability and resistance against environmental factors.

Electrical Characteristics

  • Precision Engineering: The cables feature an impedance of 50 ± 2Ω and a cut-off frequency of up to 70 GHz, with a capacitance of 26.8 pF/ft.
  • High Performance: Velocity of propagation stands at 76%, with a time delay of 1.34 ns/ft, and shielding effectiveness greater than 100 dB up to 18GHz, ensuring unmatched performance.

IW 125 Series low loss cable

IW 125 Series low loss cable

Mechanical and Environmental Durability

  • Built for Flexibility: Whether your setup requires static or dynamic configurations, the 125 Series offers a static bend radius of 0.25 inches (6.35mm) and a dynamic bend radius of 0.625 inches (15.87mm).
  • Temperature Resilient: Operating within a temperature range of -65°C to +200°C, these cables are designed to withstand extreme conditions.


Ideal for high-frequency communications, aerospace, defence, and research sectors, the 125 Series ensures reliable, high-quality signal transmission where it matters most.

FAQ for the 125 Series Low Loss Coaxial Cable

What distinguishes the 125 Series in high-frequency applications?
The combination of materials and design innovations provides exceptional performance and reliability up to 70 GHz.
Are custom configurations available for specific project needs?
Yes, Insulated Wires Inc. offers customizable options for the 125 Series to ensure the perfect fit for your application.

Explore Your Options

Learn more about how the 125 Series Coaxial Cables can support your high-frequency application needs. For detailed specifications, ordering information, and customization options, connect with us today.