Twinax Cable is a specialized cable type used primarily in weak current systems and data communication, consisting of two twisted conductors. Produced by reliable brands like Klas Kablo, these cables play a vital role in critical systems, especially those requiring impedance matching. The 78 Ohm impedance value of this cable is standardized for transmitting data signals without loss and at the correct speed. Choosing this Twinax Cable affects not only data integrity but also the fire and environmental safety of your project, depending on the insulation type.
In this comprehensive guide, we will examine the technical structure of the Twinax Cable, its different insulation options (PE cable, PVC, HFFR), and how the Delta Cable supply guarantee adds value to your projects.
What is Twinax Cable and What is the Importance of its 78 Ohm Impedance?
The Twinax Cable is made up of two insulated, twisted conductors placed within an external protective screen. This structure shields the cable from external electromagnetic interference and ensures that data signals remain clean.
- 78 Ohm Impedance: This specific impedance value is the main reason why Twinax cables are used, often in older computer networks (e.g., IBM systems or certain RF applications). Impedance matching is crucial for the signal to travel along the line without reflections.
- Areas of Use: It is traditionally preferred in data centers, mainframe connections, and control systems requiring high-frequency data transmission. These cables represent specific network solutions rather than modern telecommunication infrastructures.

Insulation Types: Differences Between PVC, HFFR, and PE Cable
In selecting the Twinax Cable, the material of the outer sheath is of great importance, depending on the environment where the cable will be used. Klas Kablo offers various insulation solutions to meet different safety and environmental requirements of projects:
- PVC Insulation: An affordable and adequate solution for indoor applications and areas with low safety risk. However, it emits toxic gases and dense smoke in case of fire.
- HFFR Insulation (Halogen-Free): Used for buildings where fire safety is mandatory (hospitals, schools, data centers). It does not emit toxic gases when burned.
- PE Cable Insulation (Polyethylene): This outer sheath type, known as PE cable, offers excellent moisture resistance, UV protection, and mechanical durability. Therefore, it is preferred when Twinax cables need to be used outdoors, where they will be exposed to direct sunlight or moisture.
Outdoor Safety: PE Cable and UV Resistance
The PE cable maintains the performance of the Twinax Cable in harsh conditions like aerial and underground lines, thanks to the unique structure of polyethylene. Outdoor-suitable PE cable versions of Twinax cables prevent your data lines from being affected by moisture or temperature changes, ensuring a long-term investment.
Post-Installation Assurance: Data Line Testing and Certification
The philosophy of long-term investment requires not only that the cables be high-quality but also that their performance is proven after installation. High-frequency data cables must be tested and certified according to international standards after laying and termination processes.
- Importance of Certification: Post-installation measurements using professional testing devices (like Fluke) confirm the line’s impedance matching, signal losses, and noise immunity. This certification report is the official proof that the system is secured against potential future faults. At Deltatema, we guarantee that the Twinax Cable we supply will pass these demanding tests.
Reliable Supply in Your Project: The Role of Delta Tema
The name Delta Cable represents Deltatema’s quality and solution-focused supply capability. Choosing the right Twinax Cable is critical for the success of your electrical project. At Deltatema, we not only supply the products of Klas Kablo but also the weak current and data solutions of Prysmian and 2M Kablo, ensuring you get the correct impedance and insulation type for your project.
- Correct Code Guarantee: Deltatema verifies the exact suitability of the product codes for Twinax cables—with their 78 Ohm impedance and required insulation features—to your project’s technical specifications. You can review all cable types on Deltatema’s Products page.
- Integrated Solutions: In modern infrastructures, we are by your side with our expert consulting service for the correct integration of Twinax cables with the fiber optic backbone.
Conclusion
The Twinax Cable, with its special impedance and flexible insulation options, is a reliable solution for data transmission. Choosing the correct Twinax Cable type, according to your project’s environment and safety standard, directly affects the system’s performance and long-term investment value. At Deltatema, we are proud to supply the most suitable Delta Cable solution for your project with the assurance of 2M Kablo and Prysmian.












