BNC is RF coaxial connector type which's easy to be installed for quick connection. Normally there're 50ohm and 75ohm impedance types, then what's the difference between 50 Ohm & 75 Ohm BNC?
Firstly let's review how do BNC connectors work:
BNC (Bayonet Neill-Concelman) connector make it easy to connect coaxial cables with radio-frequency equipment like radios and TVs, composite video on commercial video devices, and ethernet networks. The amount of ohms indicated basically measures electrical impedance along the coaxial cable.
They’re easy to install with a simple “snap and lock” mechanism, which ensures a high-quality connection. They arrive tested to 3 GHz. And they come in handy when you need to combine them with an RCA connector on the end of the coaxial cable.
All of our BNC connectors are machined from virgin brass (in accordance with MIL-C39012) and plated with bright nickels.
So what's different?
Physically, the main differences can be found in the center pins and dialectric insulators. 75-ohm BNC connectors feature Teflon as a dialectric, and surround the outer spring fingers with air. Its center pin maintains a consistent diameter in both the front and rear areas. 50-ohm connectors, on the other hand, use Delrin to surround the spring fingers, and its center pin is larger in the crimp area.
What's the difference in functionality?
Both connectors can mate without damage, but you can’t really mix and match and expect to get the same video quality. For example, if you installed a traditional 50-ohm BNC connector on a 75-ohm coaxial video cable, the digital signal would be significantly distorted.
Basically, 50-ohm BNC connectors are used for older analog video applications. But for higher performance A/V applications like HDTVs, 75-ohm BNC devices are necessary. 75-ohm BNC connectors can, however, be used for analog purposes.
Hope the image and description can help you distinguish the differences between 50ohm & 75ohm BNC.
Click here to check the BNC connectors which Superbat supply:
50ohm types: https://www.rfsupplier.com/search/?Keyword=B01-
75ohm types: https://www.rfsupplier.com/search/1.html?&Keyword=B04-
If you have any further questions, welcome to discuss with us!