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From: john larkin <jl@glen--canyon.com>
Newsgroups: sci.electronics.design
Subject: Re: high curent PCB connector
Date: Mon, 24 Feb 2025 11:26:14 -0800
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On Sun, 23 Feb 2025 20:33:07 GMT, Carl Ijames
<carl.ijamesXX@verizon.netYY> wrote:

>On Sun Feb 23 11:25:16 2025 john larkin  wrote:
>> On Sun, 23 Feb 2025 20:03:46 +0100, Lasse Langwadt <llc@fonz.dk>
>> wrote:
>> 
>> >On 2/23/25 16:45, john larkin wrote:
>> >> On Sun, 23 Feb 2025 14:02:30 +0100, Lasse Langwadt <llc@fonz.dk>
>> >> wrote:
>> >> 
>> >>> On 2/14/25 17:37, john larkin wrote:
>> >>>> Does anyone have a favorite high-current PCB connector?
>> >>>>
>> >>>> I'd like to get 20 wires into a pluggable connector, to go on a module
>> >>>> like this:
>> >>>>
>> >>>> https://highlandtechnology.com/Product/P948
>> >>>>
>> >>>> We need at least 7 amps per contact.
>> >>>>
>> >>>> That litle green Phoenix connector is cool. Wires screw into it
>> >>>> without tooling, and it's easy to mate and unmate. But it's only 5
>> >>>> pins.
>> >>>>
>> >>>> I was planning to use four of them, with two on a baby board, but that
>> >>>> idea wasn't popular.
>> >>>>
>> >>>
>> >>> https://www.mouser.ca/ProductDetail/Phoenix-Contact/1842979?qs=aYsvlkyO7qM1vWO95kklEQ%3D%3D
>> >> 
>> >> The problem with those connectorfs, and the Weidmuller equivalents, is
>> >> that humans aren't strong enough to un-mate them. And the spring-push
>> >> wire clamps are flakey. And that they have no no opinions about pin
>> >> numbering.
>> >> 
>> >
>> >We've used a lot of those plugable connectors, never seemed like a 
>> >problem to unmate them
>> 
>> We used a similar part, and it was very hard to un-mate. We use the
>> version with the cam now, but only a few of their connectors have the
>> un-mate cam.
>> 
>> https://www.digikey.com/en/products/detail/phoenix-contact/1808912/3439844
>> 
>> >
>> >doesn't have to be spring clamps, 
>> >https://www.digikey.dk/da/products/detail/phoenix-contact/1803633/260535
>> >
>> >if there no number you decide what to call the pins
>> 
>> And since the connectors are unmarked, we have to explain the pin
>> numbering to our customers, with pictures in manuals.
>> 
>> 
>
>Used maybe 2-4,000/year of those at my last job.  Our standard was to hold the cable so the wires were vertical and the screws that held the wires were towards you, like you were about to plug it in on a vertical pcb (as ours were).  Leftmost pin is #1.  Oh, you can put bare stranded wire in them but it's much more reliable to crimp a ferrule on each wire first.  That way on high current wires (cabinet power was 10-13A on 12 ga stranded) you don't miss strands, and with tiny wires (some sensor leads were up to 22 ga) the wire doesn't slip to the side of the jaw on the end of the screw as you tighten it, ready to squeeze out a month after you ship it.  Did a bit of shopping around and settled on ferrulesdirect.com, was always happy with their products.
>
>Regards,
>Carl

If we have to crimp, we may as well use a Molex connector, which has
pin numbers moulded in.