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Thread: SK sensor connectors

  1. #1
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    SK sensor connectors

    I need to order some new Molex connectors for the O2 sensors on the SK.

    I know that the part number from Digi-key for the gold plated connector itself is WM2554-ND which is the Molex 16-02-1125.

    Does anyone know the part number for the Molex housing; I need these as well.

  2. #2
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    Re: SK sensor connectors

    Quote Originally Posted by abowie
    I need to order some new Molex connectors for the O2 sensors on the SK.

    I know that the part number from Digi-key for the gold plated connector itself is WM2554-ND which is the Molex 16-02-1125.

    Does anyone know the part number for the Molex housing; I need these as well.

    The pin you listed is for a limited wire size (22-24 guage) plus its designed for 2.54mm SL connectors and not even sure it would fit the proper housing..
    there are better choices..

    You should be using Molex KK series .100 connectors

    22-30 guage
    ok
    08-50-0114 brass / tin
    08-52-0123 phosophor bronze / tin
    better
    08-55-0102 brass / select gold
    08-65-0816 phosophor bronze / select gold
    best
    08-56-0110 brass / gold
    08-65-0814 phosophor bronze / gold

    housing
    Molex 3 pin connector P/N 22-01-3037 or 22-01-2037



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    Last edited by jradomski; 17th December 2005 at 03:25.
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    Re: SK sensor connectors

    Phosphor-bronze is preferred over brass for the base metal if you intend to re-use the connection (that is, you will remove and replace the connector.)

    This is usually the case in this sort of application.....

    The high-quality gold-plated pins are not very expensive - a connector and two pins is about a buck.
    Last edited by Genesis; 16th December 2005 at 16:51.

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    Re: SK sensor connectors

    Quote Originally Posted by Genesis
    Phosphor-bronze is preferred over brass for the base metal.

    The reasons are complex but have to do with the former's ability to maintain its spring pressure over time. The "select gold" isn't worth paying for - I would go for the phosphor-bronze/gold pins. They're not particularly cheap but in quantity these things are around a buck a piece - you only need two pins and a shell per. There's no reason to get cheap here.
    I use the phosphor bronze/gold myself.. The brass/gold do hold up well for our applications and would be my choice over bronze / sel gold..

    The sel gold is better in than tin (actual contact points are gold) but doesnt have much better corrosion resistance than the base metal, The tin plating... only in a pinch..



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    Last edited by jradomski; 16th December 2005 at 16:45.
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    Re: SK sensor connectors

    Thing is these are so cheap they're not worth skimping on.

    I bought a bunch of connector housings and pins (30) for my home-build project and I think the total was something like $30 with shipping - with shipping being a big part of the cost......

    It works out to about a buck each for a pair of gold-plated phosphor-bronze pins and a housing. Going cheap there ain't worth it given the extremely low voltage and current levels involved. Mouser is your friend :)

  6. #6
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    Re: SK sensor connectors

    Quote Originally Posted by Genesis
    Thing is these are so cheap they're not worth skimping on.

    I bought a bunch of connector housings and pins (30) for my home-build project and I think the total was something like $30 with shipping - with shipping being a big part of the cost......

    It works out to about a buck each for a pair of gold-plated phosphor-bronze pins and a housing. Going cheap there ain't worth it given the extremely low voltage and current levels involved. Mouser is your friend :)
    I gave all the appropriate part numbers because not every version may be available for everyone.. Here in the US we are a bit spoiled.. I USUALLY travel with spare pins and connectors, but wouldn't you know the 1 time I needed them I didn't have them with me... I was willing to take ANYTHING that fit!



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    Re: SK sensor connectors

    Good point.... :)

  8. #8
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    Re: SK sensor connectors

    Quote Originally Posted by jradomski
    The pin you listed is for a limited wire size (22-24 guage) plus its designed for 2.54mm SL connectors and not even sure it would fit the proper housing..
    there are better choices..
    Thanks Joe.

    The part number I listed above came from Kim at Jetsam however since then I have been unable to raise her on email .

    Having looked at the parts on the site your numbers look a lot more like what I have than her part number .

    Given that the original choice of pin on the unit I have has corroded to bits (these were NOT gold plated) I'm looking for a better solution.
    Last edited by abowie; 16th December 2005 at 19:47.

  9. #9
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    Re: SK sensor connectors

    Quote Originally Posted by abowie
    Thanks Joe.

    The part number I listed above came from Kim at Jetsam however since then I have been unable to raise her on email .

    Having looked at the parts on the site your numbers look a lot more like what I have than her part number .

    Given that the original choice of pin on the unit I have has corroded to bits (these were NOT gold plated) I'm looking for a better solution.
    With the sport you have alot more freedom... The K1ds dont have the same physical requirement (no hard connector just pins) as r22ds..

    So probably ANY 3 pin connector of appropriate size and pins will work..

    The difference is that the pins I listed are a "leaf" design, the pin you liste is a "socket" design, so in theory the socket should contact the pin in more places.. but have the potential to trap water..

    The pins (your number) are phosophor bronze with a thin (at least 5 times less) gold plating and only in select areas .. I also looked at the CAD drawings and it appears that your pin will fit in the other housing, Im just not sure how wll the securing tab would operate..



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    Last edited by jradomski; 17th December 2005 at 00:00.
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  10. #10
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    Re: SK sensor connectors

    hello, best thing to prevent corrosion on the molex connectors:

    before you slide them in the plastic connector housing, put grease on the contacts, and lots of!!!

    regards
    paul

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