BNC Connector Types Explained

Written by: Tektel Team

BNC Connector Types Explained


A BNC cable connector is a type of radio frequency (RF) connector used with coaxial cables. It is primarily used in radio, television, test instruments and video signals. BNC connectors are commonly designed to operate up to 3 GHz at 75 Ohm.

Not all the BNC connectors are made the same. There are several different types of BNC connectors, designed with various methods of attachment. The different BNC connectors include the BNC Crimp on connector, the BNC twist on connector and the BNC compression connector.

BNC Crimp on connector is available in two styles – 2 piece and 3 piece. To attach the BNC Crimp on connector onto a coaxial cable, additional tools needed are a coax cable stripper and a coax crimping tool.

BNC crimp connector

Slide the crimp ferrule piece of the connector onto coaxial cable, slimmer side first.  Using a cable stripper, trim the jacket off the edge of the cable and peel it off. Fold the copper braiding over the long side of the cable. Next trim the interior insulation shielding the cable core. Slide the connector onto the cable. Fold braid back over crimp body and push crimp ferrule up over braid and crimp body. With the crimping tool, crimp ferrule to connector.

This is a very secure method and is widely used by installers.





A BNC twist on connector is convenient in that it needs no additional tools in order to be attached to the coaxial cable, except for a cable stripper. Once the cable is stripped, the rest of the work is done by hand.

BNC Twist on connector

Strip the cable to reveal its inner core. Then Cut the plastic jacket to reveal the copper braiding, and fold the braiding over the plastic shielding. Slide the bare inner core side of the cable into the BNC twist on connector and twist it clockwise to secure it.





A BNC compression connector comes in the once piece style or the F connector style. To correctly install the once piece BNC compression connector, you’ll need a stripper and a compression tool.

BNC compresion connector

Strip the jacket off the cable revealing the inner core of the cable. Next take the BNC compression connector and slid the inner core into the internal connector hole. Now push the cable into the connector into place. The inner core will come out through the connector. Using a compression tool, insert the connector into place and squeeze it tight, while holding the cable in place.

Applications of BNC Connectors

The versatility of the connectors has ensured their integration into a wide array of applications across different industries:

Telecommunications: BNC connectors are widely used in telecommunications for connecting antennas, radios, and other communication devices. Their secure connection and superior signal transmission properties make them an ideal choice in this sector.


Broadcasting: In the world of broadcasting, the BNC connectors find their place in connecting video equipment, cameras, and monitors. The ease of use and reliable signal transfer of the BNC connectors are crucial in live broadcasting scenarios.


Aerospace and Military: The rugged design and secure locking mechanism of BNC connectors make them well-suited for aerospace and military applications. They are commonly used in radar systems, avionics, and electronic warfare equipment.


Test and Measurement: The BNC connectors are extensively used in test and measurement equipment, such as oscilloscopes, signal generators, and spectrum analyzers. Their precise signal integrity ensures accurate measurement results.


Scientific Research: The BNC connectors play a vital role in scientific research setups, connecting various sensors, detectors, and instruments. Their low signal distortion is crucial for maintaining the integrity of experimental data.

Advantages of BNC Connectors

The popularity of BNC connectors can be attributed to several distinct advantages:

Quick and Secure Connection: The bayonet-style locking mechanism allows for a rapid and secure connection, minimizing downtime and ensuring reliable performance.


Signal Integrity: The BNC connectors are known for their exceptional signal integrity, making them suitable for applications where maintaining the quality of the signal is paramount.


Durability: BNC connectors are built to withstand harsh environmental conditions, making them reliable choices for outdoor and rugged applications.


Versatility: BNC connectors are available in a variety of sizes and types, accommodating different cable types and applications.


Easy Installation: BNC connectors are user-friendly and do not require specialized tools for installation, reducing complexity and ensuring a hassle-free setup.

Evolution of BNC Connectors

Over the years, the BNC connector design has evolved to meet the changing needs of industries and technologies. One notable development is the introduction of the Miniature BNC (MCX) and Micro BNC (MMCX) connectors, which offer a smaller form factor for applications where space is limited.

Another evolution is the emergence of high-definition video technologies, such as HD-SDI and 3G-SDI, which demand higher bandwidths and signal integrity. BNC connectors have adapted to these requirements, with specialized connectors designed to handle the increased data rates while preserving signal quality.

In recent years, the push towards higher data rates and digital signal transmission has led to the development of BNC connectors capable of handling 12G-SDI and even 4K and 8K video signals. These advancements showcase the adaptability and enduring relevance of the BNC connector in an ever-evolving technological landscape.

Choosing the Right BNC Connector

Selecting the appropriate BNC connector for a specific application requires careful consideration of factors such as cable type, impedance, frequency, and environmental conditions. When choosing a BNC connector, it is important to match the connector's specifications with the requirements of the system to ensure optimal performance and signal integrity.



In conclusion, the BNC connector has proven itself as a steadfast and versatile connectivity solution across a multitude of industries. Its enduring design, rapid locking mechanism, and exceptional signal integrity make it an invaluable component in various applications, ranging from telecommunications to scientific research. As technology continues to advance, the BNC connector evolves to meet the demands of higher data rates and new challenges, solidifying its place as a cornerstone of electronic connectivity. So, whether in the field of broadcasting, aerospace, or telecommunications, the BNC connector remains an indispensable tool, bridging the gap between devices and enabling seamless communication.