What is the difference between an RJ-45 Cable and a BNC Cable? Which one is a better fit?

October 14, 2013

"RJ-45 or BNC... Which is better?" is the question for today. 

I can't tell you how many times I've been asked this question, and today I'm going to put it out there for those of you who may be asking the same question. 

Let me introduce to you the RJ-45 cable. 

 Samsung SEA-C200 60ft RJ-45 CAT5e Cable

The RJ-45 cable looks just like your everyday Ethernet Cable. Looking at the image, it really does look identical to the Ethernet cables you find connected to your router or computers today. 

**BUT** there is a difference!

The RJ-45 cable that is compatible with our Samsung cables are a specific type. Although from the outside these cables look nothing different, the wiring on the inside is very much different. You must take that into account when purchasing extra wiring for your security cameras. 

Samsung's cameras including the SEB-1004RW, SEB-1005RSEB-1006R, SEB-1007R, SED-1001R, and STB-1000R connect using an RJ-45 Cable. The RJ-45 cable we sell is specifically made to be compatible with these cameras in mind. As such, if you plan on connecting these cables to existing wiring, you must make sure that they are compatible first. 

The cables that are compatible with these cameras are the RJ-45 Cat5e T-568B. Confusing? I'm quite sure that it is. Because these cameras are made without a separate power cable, this specific RJ-45 cable is made to carry both video and power currents. This specific type is required to ensure constant power flow to the camera. In cases where different incompatible cables were used, the cameras have malfunctioned beyond repair. The small wiring difference within these different types of RJ-45 cables make a world of a difference. This difference is also evident in our newest HD Camera the SDC-8340BU. Although it uses an RJ-45 cable, the type is different. It is the RJ-45 Cat5e T-568A. 

Yes! This is all very much confusing and to some not very helpful, but hopefully you now understand that there are different types of RJ-45 CAT5e cables. When you order from our website, we make sure to let you know of the difference and package the specific cables along with your system. This question is very prominent among those who want to purchase cables outside of the specific ones we have. It definitely is possible to buy it elsewhere; just be mindful of the differences when you do. 

Introducing the BNC Cable!


Unlike the RJ-45 Cable, the BNC cable is actually a lot simpler. Because of the fact that the power and video feeds were separated, BNC cables are actually considered more universal. BNC cables are the very well known coax cables. A few years back,  these cables were considered extremely bulky due to the fact that there were 2 wires. The two wires were side by side with a separate power supply and video supply. Although the same is true today, the width of the BNC Cable has decreased drastically. Now there is only a split at the two ends of the cable rather than having the two wires span separately the whole way. 

Systems such as the SDS-P5100 and SDS-P5101 are systems that utilize the BNC cables. Our whole entire line of the SDS series has transitioned into using BNC Cables. Now that the wires have become one single wire with splits only at the ends, it has become more popular among those installing their own security camera systems. 

A lengthy description of the inside wiring of the BNC cables is not necessary because there isn't a difference among these cables. Although the power voltage required by a different brand of cameras, the main coax wire is basically the same all around.



Each one has its benefits. Such would include the fact that the RJ-45 cables we introduced today are able to carry power, video and audio all under one line while BNC cables are only good for power and video. BNC cables are better in the aspect where most systems out there are transitioning towards BNC Cables due to their simplicity, so in the case that you're switching camera systems, there is a greater chance that the new one will also use BNC Cables. 

It all comes down to what you're looking for. Your current needs may require that you install audio capable cameras which are only available with the RJ-45 connection, or you may want a system that isn't going to require you to do rewiring in the case of new system purchases down the road. 

In the end, the wiring is merely a means to connect the cameras and as such your needs will dictate which type of wiring you need, not the other way around. 

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