SMT Wire to board connector - Page 1
Forum section: electronics / general

author: djococaud
author_rank: Regular Contributor
timestamp: July 04, 2017, 01:01:43 pm
content: Hi everyone,I used wago 2061 series connectors on several of my boards but they are very fragile (the 1-way one in particular). the plastic body tends to separate from the metal base (or the plastic lug breaks).Does anyone knows about a more robust equivalent (or some other low profile SMT wire connector) ?The problem is that I need to insert a 1/1.5mm² bare stranded wire into it and it must be SMT (It's mounted on an aluminium PCB with a big heatsink under it). (could be a low profile SMT screw terminal though)Thanks guys !

author: alm
author_rank: Super Contributor
timestamp: July 04, 2017, 01:08:44 pm
content: How about an off-board strain relief? I have a hard time believing any small SMT connector will be really robust.

author: djococaud
author_rank: Regular Contributor
timestamp: July 04, 2017, 01:15:33 pm
content: Sadly the biggest issue is not the stress on the cable but that the board will be installed by any guy which does not know it shouldn't be done with a hammer...The problem is the câble assembly (which is when the connector breaks). When the cable is connected, the board /cable won't be touched again.

author: alm
author_rank: Super Contributor
timestamp: July 04, 2017, 01:18:27 pm
content: Would terminating the bare wire in a connector and then connecting the connector to the board result in less board stress? He could use a hammer to terminate that wire for all you care.

author: djococaud
author_rank: Regular Contributor
timestamp: July 04, 2017, 01:34:47 pm
content: It would indeed be easier to find a female connector with a male connector terminated wire.But the existing wire is bare and the board must be installed quickly with less efforts as possible (the wago connector was great for that), and we don't have much space to fit a connector...

author: sleemanj
author_rank: Super Contributor
timestamp: July 04, 2017, 01:46:23 pm
content: Molex has a similar product...http://www.molex.com/molex/products/family?key=litetrap&channel=products&pageTitle=IntroductionNo experience just know it exists.Wire pigtails pre-soldered to the boards and more substantial wire-to-wire joiners (wago ones you know about for sure) may be a better option?

author: djococaud
author_rank: Regular Contributor
timestamp: July 04, 2017, 02:09:13 pm
content: Thanks for the molex link, I've seen it before as a potentially good replacement but AWG 18-26 is not enough for my 1/1.5mm wire. Sadly they don't seem to make a bigger version(I will check that again)

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: July 04, 2017, 03:28:49 pm
content: SMD screw terminals :http://www.mac8sdk.co.jp/mac8/parts/PPP/pv3.html

author: sparkswillfly
author_rank: Contributor
timestamp: July 05, 2017, 07:47:49 am
content: http://www.avx.com/products/connectors/wire-to-board/standard-14-20-awg-00-9177/http://www.avx.com/products/connectors/wire-to-board/horizontal-contact-12-28-awg-70-9296/

author: djococaud
author_rank: Regular Contributor
timestamp: July 05, 2017, 07:55:57 am
content: Thanks for the links...So frustrating that the Wago were perfect for my uses but breaks so easily!

author: thommo
author_rank: Frequent Contributor
timestamp: July 07, 2017, 03:53:03 am
content: It seems that SPARKSWILLFLY's suggestion has this well covered - their range is substantial ... check out their catalogue.http://catalogs.avx.com/Wire-to-Board.pdfGood luck - Peter

author: djococaud
author_rank: Regular Contributor
timestamp: July 07, 2017, 05:55:14 am
content: Thanks Peter, I'll have a look..My boss ordered a bunch of different SMT connectors (always nice to have plenty of things in the drawers) so we can test them on our boards...so we'll see !

author: janekm
author_rank: Unknown
timestamp: July 07, 2017, 05:58:23 am
content: Does it really have to be SMT? When people are really going to be tugging at your connectors THP is really still the way to go (even most SMT connectors like for microUSB tend to have some through-hole "horns" if significant strain is to be expected).

author: Ice-Tea
author_rank: Super Contributor
timestamp: July 07, 2017, 06:23:23 am
content: Check the Phoenix catalog:https://www.phoenixcontact.com/assets/interactive_ed/global/modules/0001068/index.html#6

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: July 07, 2017, 06:32:52 am
content: Quote from: janekm on July 07, 2017, 05:58:23 amRead the OP - it's an aluminium PCB, so not practical to use TH