EEVblog Electronics Community Forum
Products => Other Equipment & Products => Topic started by: akis on September 11, 2014, 09:03:27 pm
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I am looking for a small connector to connect / disconnect a 3 lead wire. The connector will be inline and ideally it will not be bulky or fat. There are 3 wires in one lead. One of the three carries more current, about 0.5A, the other two carry negligible current. The connectors will be used once a day.
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No ideas at all?
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What are your size constraints and budget? Sealing requirements and environmental constraints?
Push-pull? Bayonet? Threaded?
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Define small, bulky, fat.
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Offhand, consider the 711 (https://binder-ee-assets-prd.s3.amazonaws.com/pdfs/Sections_from_Catalog/711.pdf) (IP40) and 712 (https://binder-ee-assets-prd.s3.amazonaws.com/pdfs/Sections_from_Catalog/712.pdf) (IP67) M9 series from Binder.
Alternatively, look through circular connector options on distributors like Digikey.
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No ideas at all?
(http://thehub.musiciansfriend.com/images/tech-tips/3-pin-male-female-xlr-connectors.jpg)
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Ideally I am looking for a connector with 3 pins, or 3 separate connectors, that would be as small as the wires they are connecting.
Imagine for example a combination of
http://uk.farnell.com/molex/22-29-2031/header-tht-vertical-2-54mm-3way/dp/1360131 (http://uk.farnell.com/molex/22-29-2031/header-tht-vertical-2-54mm-3way/dp/1360131)
and
http://uk.farnell.com/molex/10-11-2033/connector-rcpt-3pos-1row-2-54mm/dp/2396204 (http://uk.farnell.com/molex/10-11-2033/connector-rcpt-3pos-1row-2-54mm/dp/2396204)
But these are made for connecting wires to boards.
However they are small enough. I was imagining something like a pin that would attach to each wire and on the other side a receptacle with "sockets" for these pins, so the whole assembly would not be much larger than the wires themselves.
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Ideally I am looking for a connector with 3 pins, or 3 separate connectors, that would be as small as the wires they are connecting.
Imagine for example a combination of
http://uk.farnell.com/molex/22-29-2031/header-tht-vertical-2-54mm-3way/dp/1360131 (http://uk.farnell.com/molex/22-29-2031/header-tht-vertical-2-54mm-3way/dp/1360131)
and
http://uk.farnell.com/molex/10-11-2033/connector-rcpt-3pos-1row-2-54mm/dp/2396204 (http://uk.farnell.com/molex/10-11-2033/connector-rcpt-3pos-1row-2-54mm/dp/2396204)
But these are made for connecting wires to boards.
However they are small enough. I was imagining something like a pin that would attach to each wire and on the other side a receptacle with "sockets" for these pins, so the whole assembly would not be much larger than the wires themselves.
Someone makes wire mount KK-compatible male connectors. No idea who makes them, but I've seen them on adapter wires for PC fans. (http://www.amazon.com/Zalman-ZM-MC1-Multi-connector-Add-Fan/dp/B000FAKUE6/ref=sr_1_1?ie=UTF8&qid=1410554084&sr=8-1&keywords=computer+fan+adapter)
If you really need the connector to be the same dimensions as the cable, then what size is the cable? Also it will be hard to provide adequate strain relief without a part of the connector (or even a layer of heatshrink) extending out over the outer jacket. I don't think it's reasonable to expect there to not be any additional width, unless you want to consider some sort of custom molded-into-the-jacket kind of thing.
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A TA3F/M connector might be closer to what you're looking for. Smaller, locking and has built in strain relief.
Often used with 22-26 gauge mic cable.
(http://cpc.farnell.com/productimages/farnell/standard/42246086.jpg)
LEMO is another option, though they can be a bit of a bear to assemble if you've never worked with them.
(http://spares.sennheiser.co.uk/gfx/product000020-lemo.jpg)
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I think I have found almost what I want.
1) this is the socket (female terminals) : http://uk.farnell.com/molex/50-57-9003/connector-housing-receptacle-3pos/dp/1718881 (http://uk.farnell.com/molex/50-57-9003/connector-housing-receptacle-3pos/dp/1718881)
2) this is the usual pins it attaches to: http://uk.farnell.com/molex/22-28-4032/board-board-connector-header-3way/dp/1813139?MER=en-me-pd-r2-acce-con (http://uk.farnell.com/molex/22-28-4032/board-board-connector-header-3way/dp/1813139?MER=en-me-pd-r2-acce-con)
Now I can make a plug-socket out of this, the problem will be the "header" with exposed wires - but I can solder the wires on and use heatshrink to insulate and make more sturdy. Not perfect. Of course if MOLEX sold a "male socket" that would be the ideal solution.
But here we have something quite similar with also solves the problem :
This picture shows male and female sockets http://www.ebay.co.uk/itm/RC-30cm-300mm-Servo-Extension-Lead-Wire-Hitec-Connector-Plug-male-female-gold-/201116691491?pt=UK_ToysGames_RadioControlled_JN&hash=item2ed37d2c23 (http://www.ebay.co.uk/itm/RC-30cm-300mm-Servo-Extension-Lead-Wire-Hitec-Connector-Plug-male-female-gold-/201116691491?pt=UK_ToysGames_RadioControlled_JN&hash=item2ed37d2c23)
And here is what it looks like without the leads soldered on:
http://www.ebay.co.uk/itm/5-or-10-Pairs-Sets-Servo-Connectors-Terminals-JR-Spektrum-Etc-Gold-Plated-/291227116842?pt=UK_ToysGames_RadioControlled_JN&var=&hash=item43ce7d252a (http://www.ebay.co.uk/itm/5-or-10-Pairs-Sets-Servo-Connectors-Terminals-JR-Spektrum-Etc-Gold-Plated-/291227116842?pt=UK_ToysGames_RadioControlled_JN&var=&hash=item43ce7d252a)
So I am quite close. I can use the ebay stuff, or I can search Farnell for the equivalent "male socket 2.54 mm"
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You can get male pins for Molex SL connectors. I've used them before. They're just made of folded metal, so not terribly sturdy though.
edit: Sorry, I meant to include the part numbers but forgot.
Molex SL male crimp terminals, part no. 16-02-0114
Molex SL female crimp terminals, part no. 16-02-0102
Molex SL crimp housings, 4 circuit, single row, non-polarized, part no. 50-57-9004
I believe these are the correct numbers for the items in the attached photo.
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Thanks it took ages browsing the Molex website, but I think I have got what I need.