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Message-ID: <54A71584.3090308@sbcglobal.net>
Date: Fri, 02 Jan 2015 14:02:44 -0800
From: Girvin Herr <girvin DOT herr AT sbcglobal DOT net>
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To: geda-user AT delorie DOT com
Subject: Re: [geda-user] mating, both panel mount power connectors
References: <CALSZ9gpx=74ZXDQPXBaUOVtef0aph+tRBYFxL=WNjbjugjETxw AT mail DOT gmail DOT com> <201501021222 DOT 17743 DOT ad252 AT freeelectron DOT net>
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Reply-To: geda-user AT delorie DOT com


On 01/02/2015 09:22 AM, al davis wrote:
> On Friday 02 January 2015, Rob Butts wrote:
>> I'd like it to work in such a way that when both boxes are
>> plugged together they are flush to each other.
>>
>> Does anyone know of such connector pairs?
>>
>> PS, this is up to 15 amps.
> Cinch-Jones.
>
> They are rated 10 amps, so get multi-pin connectors and parallel
> the pins.
>
Greetings,
 From experience, I would say be careful paralleling power pins for 
currents over the single-pin rating.  I had a project once that used 
four Molex power connectors connected in parallel on a large COTS 
Multibus backplane.  The connectors failed when one pin increased it's 
contact resistance, transferring power to the other pins, which then 
overheated, increasing their resistance.  The connectors failed in a 
cascade failure and burned up.  The root cause in this case was 
dissimilar materials.  Our connectors had gold plated pins and the COTS 
backplane mating connectors had tin plated pins.  We changed our 
connector pins to (ugh) tin plated and these power connector failures 
stopped.  Just a word to the wise.
Girvin Herr