Electronic – Replacing RJ45 connector with another type connector

connectorimpedanceimpedance-matchingreplacementrj45

I am looking for a replacement for an RJ45 panel mount connector. Can I use any standard connector (picture below) for connecting Ethernet networks?

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I know about cable impedance matching but I was wondering if the connector's contacts have any effect on the line's impedance. So I searched dozens of RJ45 panel mount connectors datasheets(such as this datasheet) to find that the impedance is not even mentioned.

Edit:

Since people are asking questions about the reasons for replacing the RJ45 connector:

  1. There is another RJ45 connector and I want to prevent plugging the cable into the wrong connector
  2. I listed the mini DIN as an example (We use this connector so its stocked and really cheap) but the question is generally about using a non modular connector to connect an Ethernet network.

Some Conflicting answers:

The connector has a matched impedance even though its not stated in the datasheet because it's so obvious

VS

Its meaningless to ask for the impedance for a connector. It has no capacitance or inductance

Correct me if I'm wrong but I think The second answer is correct. I will surely use a CAT5e cable and shorten the mini-DIN connector's wires minimizing the length of the unraveled cable. I guess this should work…

Best Answer

You would only be able to answer this by examining the return loss and crosstalk if using duplex mode for the distance you need. Given that RJ-45 come with ferrite common mode filters as an option, you would lose this noise improvment. When choosing a connector, beware that this is one of the most common types and your ability to locate them is limited only by your awareness of distributors.

Characteristic impedance is geometric property of conductor spacing and thickness or in coaxial inner OD/ID for a given dielectric constant. This defines the distributed inductance to capacitance ratio which is a function for impedance that must be matched to each 110 Ohm line.