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'[EE]: Connector with >50K mating cycles?'
2011\01\16@212921 by K S

picon face
Hello list.

I have a situation involving some electronics in a drawer that will be
regularly pulled from it's frame. This might happen, say, 10 times a
day, so over 10 years this is over 35K mating cycles.

I just had a look at some connectors and realised how abysmal most of
the mating cycle specs are. Some smart-card connectors specify >50K
cycles but I need to be concerned about both ends and am assuming that
gold flash on a PCB (emulating smart-card landings) won't last
anywhere near that long. I have thought of pogo pins or some custom
made leaf-spring type connectors but was hoping for something a little
more "complete" with a housing, possibly some locating pins,
off-the-shelf, etc.

Does anyone know of a suitable connector that might be rated for >35K
(or to round it out >50K) mating cycles

2011\01\16@215541 by Carl Denk

flavicon
face
For RS-232 serial ports, there are pass through easily replaceable inexpensive connectors. Using that idea, could you make some inexpensive easily changed wear points, male/female sort. Maybe could as routine maintenance specify a change schedule.

On 1/16/2011 9:29 PM, K S wrote:
> Hello list.
>
> I have a situation involving some electronics in a drawer that will be
> regularly pulled from it's frame. This might happen, say, 10 times a
> day, so over 10 years this is over 35K mating cycles.
>
> I just had a look at some connectors and realised how abysmal most of
> the mating cycle specs are. Some smart-card connectors specify>50K
> cycles but I need to be concerned about both ends and am assuming that
> gold flash on a PCB (emulating smart-card landings) won't last
> anywhere near that long. I have thought of pogo pins or some custom
> made leaf-spring type connectors but was hoping for something a little
> more "complete" with a housing, possibly some locating pins,
> off-the-shelf, etc.
>
> Does anyone know of a suitable connector that might be rated for>35K
> (or to round it out>50K) mating cycles?
>

2011\01\16@235356 by Steve Smith

flavicon
face
Have you considered a contactless solution like a smart card for instance
???
Steve

-----Original Message-----
From: spam_OUTpiclist-bouncesTakeThisOuTspammit.edu [.....piclist-bouncesKILLspamspam@spam@mit.edu] On Behalf Of
Carl Denk
Sent: 17 January 2011 02:56
To: Microcontroller discussion list - Public.
Subject: Re: [EE]: Connector with >50K mating cycles?

For RS-232 serial ports, there are pass through easily replaceable inexpensive connectors. Using that idea, could you make some inexpensive easily changed wear points, male/female sort. Maybe could as routine maintenance specify a change schedule.

On 1/16/2011 9:29 PM, K S wrote:
{Quote hidden}

>

2011\01\17@003125 by K S

picon face
> Have you considered a contactless solution like a smart card for instance
> ???

I need power connections to charge a battery in the drawer

2011\01\17@010022 by doug metzler
picon face
These guys are rated 10k cycles

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=70AAJ-6-M0-ND

DougM

On Sun, Jan 16, 2011 at 9:31 PM, K S <kreshospamKILLspamgmail.com> wrote:

> > Have you considered a contactless solution like a smart card for instance
> > ???
>
> I need power connections to charge a battery in the drawer.
>

2011\01\17@010053 by Sean Breheny

face picon face
Try Cableco/Methode and Elcon/Tyco

Sean


On Sun, Jan 16, 2011 at 9:29 PM, K S <.....kreshoKILLspamspam.....gmail.com> wrote:
{Quote hidden}

>

2011\01\17@013836 by Oli Glaser

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face
On 17/01/2011 02:29, K S wrote:
> Does anyone know of a suitable connector that might be rated for>35K
> (or to round it out>50K) mating cycles?

Not 50K, not seen any higher than around 20K:

http://www.molex.com/molex/products/family?key=detachable_boardtoboard&channel=products&chanName=family&pageTitle=Introduction <http://www.molex.com/molex/products/family?key=detachable_boardtoboard&channel=products&chanName=family&pageTitle=Introduction>

http://www.amphenol.co.uk/pdf/Line%20Replaceable%20Module%20Connectors.pdf

For higher, I would either do something like use two connectors (of which either can be used, effectively doubling cycles)
Or simply pick a good solid connector (with plenty of metal, large surface area and tight fit) that can be easily serviced - e.g. when it fails just file down contacts (or dip in e.g. FeCl). Using something (lubricant or some more specific stuff) to help stop (re)oxidisation would be helpful here.



2011\01\17@020124 by K S

picon face
> These guys are rated 10k cycles
>
> http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=70AAJ-6-M0-ND

>From my understanding these mate with a PCB edge / landing, right? If
that's the case then the connector will (will it?*) far outlive the
mating PCB side.

* Does anyone have any data on the endurance of a PCB edge or land,
for gold, tin or whatever? I've seen anecdotal numbers but no
guarantees anywhere

2011\01\17@020814 by K S

picon face
I found some spring contacts from Preci-Dip and Mill-Max (quite
straight forward to find on their websites) that might do the job but
still welcome any suggestions. Thanks everyone

2011\01\17@113831 by doug metzler

picon face
re:
> From my understanding these mate with a PCB edge / landing, right? If
> that's the case then the connector will (will it?*) far outlive the
> mating PCB side.

Actually they have a mating connector on the other side - same material.

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=70AAJ-6-F0-ND

Thanks,

DougM

On Sun, Jan 16, 2011 at 11:01 PM, K S <EraseMEkreshospam_OUTspamTakeThisOuTgmail.com> wrote:

{Quote hidden}

>

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