Substitute Ethernet connector candidate [repair/retro-engineering] - Page 1
Forum section: electronics / projects

author: lamoule74
author_rank: Contributor
timestamp: May 02, 2023, 02:08:49 pm
content: Hey everyone,Not sure I'm in the right section to talk about this topic...I am desesperatly trying to find a substitute header for that RJ45 female connector on this PCB's Wi-Fi repeater(one has been pulled off).I thought that kind of connectic was standardized but ....... Ha - ha - ha - ha,.....what a naive opinion...There is apparently 2 different orientations (approximatively at 53°) here is a picture of the bottom(attachment 1)Of course there is also different interaxials distances related to the pins, main headers I 've found are 8.9 × 2.54 mm sized (attachment 2)So I found that one, approaching my connector's dimensions (briefly measured with my caliper, 7.14 mm widht):(attachment 3)link :https://www.sunrom.com/p/rj45-8p8c-socket-side-entry-pcb-mount-network-ethernetBUTIt seems this 7.14 version (called ?) has 1.78 mm height, and mine seems to be at2.54 mmDoes anyone knows where this header could be found of if there is a standard about that center-distances + orientation ?

author: lamoule74
author_rank: Contributor
timestamp: May 04, 2023, 04:17:59 pm
content: anyone ? :'(

author: wasedadoc
author_rank: Super Contributor
timestamp: May 04, 2023, 04:50:38 pm
content: You also need to be aware that some of those jacks are just connectors and some also contain transformers. (Integrated magnetics) It is essential that you use the correct type.

author: lamoule74
author_rank: Contributor
timestamp: May 12, 2023, 02:29:06 pm
content: Do you have any particular advice to find the right connector ?Only one by one / datasheet by datasheet,don't you find a particular stadard with this distances between these PINs ??thx in advance.

author: coromonadalix
author_rank: Super Contributor
timestamp: May 12, 2023, 10:28:04 pm
content: if you search rj45 pcb connector lots of answers, you just need to find a good provider near you and try the specs sheetsMouser, DigikeyElectrosonic etc ... but in france

author: lamoule74
author_rank: Contributor
timestamp: May 15, 2023, 10:03:29 am
content: I was fearing this reply,... but it's not a surprise .ty anyway.

author: coromonadalix
author_rank: Super Contributor
timestamp: May 15, 2023, 10:20:32 am
content: Well that's a search you have to do, even people here will do the same trying to help you ??

author: DavidAlfa
author_rank: Super Contributor
timestamp: May 15, 2023, 06:12:16 pm
content: Has to be a really good wifi repeater!I know, I know, but you can get a new one for 15€, all the research/ordering/shipping costs/repairing won't make much sense unless you already have that exact connector somewhere.

author: lamoule74
author_rank: Contributor
timestamp: May 22, 2023, 02:11:51 pm
content: Hey @coromonadalixNo problem with search,I was only trying to figure out if that kind of PIN's dispositions had a "standard" or what ;in the aim to put it in a research filter (in an online shop) of something...It seems it's not the case, what a shame and too bad for me.Most of the RJ45 connectors I found got the same dispositions and center axis,that's why asked.So I will do what I do for 99% of my research when I'm looking for a connector to replace:read the datasheet, and compare the layout with my caliper.cheers

author: lamoule74
author_rank: Contributor
timestamp: May 22, 2023, 02:13:12 pm
content: @DavidAlfa90€not so cheap...

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: May 22, 2023, 03:05:06 pm
content: Quote from: wasedadoc on May 04, 2023, 04:50:38 pmAnd these types don't all have the same pinout either. Easy enough to ID though therough the absence of a seperate transformer on the PCB.For normal RJ45s, there are a few common variants - tab-up & dab-down, and a couple of different spacings bertween the signal pins and location pegs/shield holes. I have come across an oddball RJ45 with a wierd pinout (lines crossed internally) but these are rare