screw down PCB terminal blocks? - Page 1
Forum section: electronics / general

author: coppercone2
author_rank: Super Contributor
timestamp: November 10, 2023, 06:40:18 am
content: Do they have any terminal blocks that you solder to a PCB but you also screw down with side holes so they are tight ? These things are always wobbly and are kind of shitty

author: jonpaul
author_rank: Super Contributor
timestamp: November 10, 2023, 07:09:51 am
content: CopperConeFor high current screw connect to PCB, individual terminals are better. These have several PCB pins down thru the PCBsearch for "high current screw PCB terminals"https://www.eeworldonline.com/line-of-rugged-pcb-screw-terminals/Old line connector vendors like AMP and Berg and others made these,Alternative is the German screw term like Wiedmuller,in 1990ss. we used AMP in 30A arc lamp PSU.Jon

author: coppercone2
author_rank: Super Contributor
timestamp: November 10, 2023, 07:19:42 am
content: nah I don't mean high current. I just mean so the plastic bit is screwed down. Purely a mechanical improvement.There is a spring thing embedded in the plastic. you solder the spring down. I want the plastic to be screwed down. Even if only with m2 screwsthere are tons of connector housings that are totally garbage because the plastic bit ends up coming off, even with header housings. I have seen it happen in brand new commercial products too.like if you put a flange on the bottom with screw holes. A metal connector has this, like a DSUB, its screwed down to whatever with alot of them, directly on the PCB. But I want screw terminals or spring terminals that have this, with plastic, since their not shielded.I don't mean the wire, I mean the receptacle. Its so janky

author: coppercone2
author_rank: Super Contributor
timestamp: November 10, 2023, 07:24:09 am
content: like this thing. dr moreu connection. and I mean one piece, not one you disassemble the headers from.

author: SiliconWizard
author_rank: Super Contributor
timestamp: November 10, 2023, 08:30:18 am
content: Use real connectors?

author: JohanH
author_rank: Frequent Contributor
timestamp: November 10, 2023, 09:10:06 am
content: For instance Eaton has many different terminal blocks that you can screw down.https://www.eaton.com/us/en-us/products/electronic-components/terminal-blocks.html

author: coppercone2
author_rank: Super Contributor
timestamp: November 10, 2023, 02:22:11 pm
content: I don't see any that solder to the PCB with small pins but have flanges.

author: coppercone2
author_rank: Super Contributor
timestamp: November 10, 2023, 02:29:23 pm
content: Quote from: SiliconWizard on November 10, 2023, 08:30:18 amthey phase in and out of existence depending on if there is a ferrule present

author: tooki
author_rank: Super Contributor
timestamp: November 10, 2023, 02:47:09 pm
content: Quote from: coppercone2 on November 10, 2023, 06:40:18 amWAGO has ones with flanges, but they’re the spring clamp style, which in a way doesn’t need them. (I prefer the spring clamps or lever clamps anyway, but they’re fine without flanges since there’s no rotation involved.)

author: jmelson
author_rank: Super Contributor
timestamp: November 10, 2023, 05:26:33 pm
content: I use a ton of On-Shore Tech 2-piece terminals, they have them in 3.81 and 5 (and 5.08) mm pitch. These are clones of the Phoenix Contact Euro-style connectors. I have a local, non-stocking distributor that can get them for me at half the Digi-Key price. They are quite reliable although with LOTS of handling like test rigs, the wires sometimes break. The terminals with the bendable metal flap that is pressed down by a screw are not relaible. The ones I mention have a square cage that is pulled up against an L-shaped piece to clamp the wire securely.Jon

author: coppercone2
author_rank: Super Contributor
timestamp: November 10, 2023, 05:29:50 pm
content: I am looking for a one piece terminal. I know you can get two piece terminals where one half is soldered down, then you screw the other half to it. I just want a spring or screw loaded terminal block that screws down to the PCB.I was hoping there was a range from tiny to big ones. I guess no one thinks securing the plastic bit is important.If you have a prototype, that you need to solder to, those terminals get messed up after enough back and forth. I wanted one that will stay pristine.I like having banana to ferrule cables to connect a lab PSU to a prototype board.I guess installing a two piece is the next best thing, since its a reconfigurable connector that is suitable for prototyping with 'test leads', and it plugs in which is kind of easier then undoing multiple wires and lower stress.I suppose leaving a banana to ferrule cable connected to a 2 piece connector is also less likely to have an accidental short circuit from exposed ferrules, which might be useful at higher voltages and currents.Because I would say cycle life is kind of low for discrete wire terminal blocks, especially on something like strip board.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: November 10, 2023, 05:46:48 pm
content: Mounting? Sure, I guess you could use things like these:https://www.digikey.com/en/products/detail/schroff/60807181/4210062Wouldn't necessarily recommend putting any current through it though.Barrier strips are available in PC mount form. Some come in vertical and right-angle formats, either screwing through the PCB into a support member or panel mounting directly with the PCB behind (which may or may not be a nightmare to solder in place, with both connector and PCB mounted to the panel first, or with clever solutions to avoid that).Tim

author: JohanH
author_rank: Frequent Contributor
timestamp: November 10, 2023, 06:50:26 pm
content: Quote from: coppercone2 on November 10, 2023, 02:22:11 pmI must be misunderstanding what you mean, because I see such things on the linked page.

author: EPAIII
author_rank: Super Contributor
timestamp: November 12, 2023, 06:46:34 am
content: You ask for terminal blocks that can be screwed to a PC board. Well, there are a few. Here is just one search:https://www.mouser.com/c/connectors/terminal-blocks/?orgKeyword=terminal%20block138,000 HITS! If even 10% of them allow screw attachment, I imagine that you can find almost any type you can imagine.Does anybody here ever look in the ELECTRONIC SUPPLY HOUSES??Quote from: coppercone2 on November 10, 2023, 06:40:18 am

author: coppercone2
author_rank: Super Contributor
timestamp: November 12, 2023, 09:56:02 am
content: there are zero with screw attachmentshow me a picture of one

author: nctnico
author_rank: Super Contributor
timestamp: November 12, 2023, 11:23:59 am
content: Quote from: coppercone2 on November 12, 2023, 09:56:02 amWhy not use a threaded brass standoff? These are typically nickel plated which is electrically compatible with gold plating on a PCB. Screw it down to the PCB and screw the wire to the top. You'll need to use lugs instead of ferrules though.I strongly doubt you'll find what you are looking for because from a mass manufacturing and reliability point of view, having two screws for a single connection is not a good idea.Typically I use plugin terminal blocks (two piece) so getting the wires wrong is next to impossible.Edit: another option could be these poke-in connectors from Wurth:https://www.we-online.com/en/components/products/LECO_SINGLE_CONTACT_POKE_IN_CONNECTOR_VERTICALThese are listed under LED lighting connectors on their website.

author: EPAIII
author_rank: Super Contributor
timestamp: November 14, 2023, 04:29:37 am
content: OK, I hope I got it straight.Terminal Block - screw or springNOT a two pieceMust have holes for screw attachment to PCBIf you come up with another dis-qualifier, I GIVE UP and you are on your own. Here is a ten minute search on a supplier of electronic components. I am showing only a few items from the first two pages: there are many, many more that YOU CAN look through.https://www.mouser.com/c/connectors/terminal-blocks/barrier-terminal-blocks/?m=Molex%7C~TE%20Connectivity%7C~Eaton&mounting%20style=PCB~~PCB%20Mount%7C~Screw%7C~Through%20Hole&rp=connectors%2Fterminal-blocks%2Fbarrier-terminal-blocks%7C~Mounting%20Style&pg=2https://www.mouser.com/ProductDetail/Molex/38720-6203?qs=92PpRWlfdpo1U4kvJ3RusA%3D%3Dhttps://tools.molex.com/pdm_docs/sd/387206213_sd.pdfhttps://www.mouser.com/ProductDetail/Molex/38700-6102?qs=BLN8Q0P37Wbt6EAuH115Vg%3D%3Dhttps://tools.molex.com/pdm_docs/sd/387006113_sd.pdfhttps://www.mouser.com/ProductDetail/Molex/38720-6214?qs=WKQl4mA73SrjjcCngX6WaA%3D%3Dhttps://www.mouser.com/ProductDetail/Molex/38720-6204?qs=92PpRWlfdprN85%2FueVtkbg%3D%3Dhttps://www.mouser.com/ProductDetail/Molex/38710-0206?qs=fC58TTDYFK9tz9ynGztkWA%3D%3DEach and every one of them is a PRECISE MATCH to your description. I am not going to look at idiot places like Ali-Express. If you want to buy there, please do so without my assistance. Good luck.

author: EPAIII
author_rank: Super Contributor
timestamp: November 14, 2023, 04:34:55 am
content: PS: I have used PCB terminals without screws and they didn't wobble in the least. I bet you can not give me a brand name of the ones you had trouble with. And I mean a brand name that is ON the terminal board, not just some Chinese mom and pop shop that sells stuff made in their kitchen.

author: coppercone2
author_rank: Super Contributor
timestamp: November 14, 2023, 04:48:25 am
content: those are all 100% not what I wanted. I showed a picture of what I am looking for. nice rage tho

author: EPAIII
author_rank: Super Contributor
timestamp: November 19, 2023, 08:58:35 am
content: You said, and I directly quote YOU, "like this thing. dr moreu connection."From the Oxford Language dictionary, "having the same characteristics or qualities as; similar to.'they were like brothers'".Each and every item that I linked is "similar to" or has "the same characteristics or qualities as" you described and showed in the picture. If it must look exactly like the picture, you should have said that and not "like". I was trying to help by finding functional equivalent items: terminal boards with screw or spring wire connections, a way to secure them with screws, and one piece design.Anyway, I do give up. Good luck in your search. Perhaps someone else here can read your mind.By the way, I absolutely do not understand the Dr Moreu reference. But that's probably my problem too.Quote from: coppercone2 on November 14, 2023, 04:48:25 am

author: coppercone2
author_rank: Super Contributor
timestamp: November 19, 2023, 09:11:50 am
content: you linked some huge ass industrial shit

author: EPAIII
author_rank: Super Contributor
timestamp: November 19, 2023, 10:53:16 am
content: Wago makes some interesting stuff, but you probably wouldn't like it as it does not come in a 0.1" pitch and they seem to require a tool to insert and remove the wires. Oh, and they don't look anything like your photo.https://www.digikey.com/en/products/filter/wire-to-board/371?s=N4IgjCBcoKxaBjKAzAhgGwM4FMA0IB7KAbRAGYB2CgJmrgF18AHAFyhAGUWAnASwDsA5iAC%2BI-NRIgACgGEAQgAIEBfv2wIWBbiHoigAfile:///C:/Users/Owner'/Downloads/Datasheet-2.pdf

author: EPAIII
author_rank: Super Contributor
timestamp: November 19, 2023, 10:54:45 am
content: I guess I missed your post where you ruled out "huge ass industrial shit".Quote from: coppercone2 on November 19, 2023, 09:11:50 am

author: alm
author_rank: Super Contributor
timestamp: November 19, 2023, 11:04:45 am
content: Quote from: coppercone2 on November 19, 2023, 09:11:50 amNext time, since I think you've burnt the good will of the people willing to help for this question, try specifying your requirements clearly in the first post. I didn't see any dimensions stated like pitch, current/voltage rating, wire size etc. Yet you complain about solution not meeting these unstated requirements. I could understand this if you're a complete beginner, but I don't think you are. You'll get more useful answers if you don't make people work so hard to get the essential information out of you.

author: tooki
author_rank: Super Contributor
timestamp: November 19, 2023, 02:52:14 pm
content: Quote from: EPAIII on November 19, 2023, 10:53:16 amI mentioned the WAGO ones a week ago but OP simply ignored it…

author: SiliconWizard
author_rank: Super Contributor
timestamp: November 19, 2023, 11:47:24 pm
content: Quote from: coppercone2 on November 10, 2023, 02:29:23 pmA bit like us.

author: Simon
author_rank: Unknown
timestamp: November 20, 2023, 09:00:45 am
content: Quote from: coppercone2 on November 10, 2023, 06:40:18 amwhat current. You can't talk about connectors and be taken seriously if you don't state current.