how many milliamps can a standard pcb header hold up to?

Discussion in 'General Electronics Chat' started by durable126, Mar 26, 2016.

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  1. durable126

    Thread Starter Member

    Feb 20, 2016
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    assuming your supply can give infinite current support, how many mA can a standard header pin on a pcb handle?

    100,200,300, 400?


    Thanks in advance
     
    Last edited: Mar 26, 2016
  2. crutschow

    Expert

    Mar 14, 2008
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    What's a pub (besides a tavern in Britain)?
     
  3. durable126

    Thread Starter Member

    Feb 20, 2016
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    typo PCB ridiculous smart phones change everything to whatever they want now days
     
  4. blocco a spirale

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    Jun 18, 2008
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    The datasheet will tell you.
     
  5. tracecom

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    Apr 16, 2010
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    If you are referring to .025" square pins, the answer is in amps rather than milliamps.
     
  6. durable126

    Thread Starter Member

    Feb 20, 2016
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    This is my favorite "all about circuits" reply!

    Typical answer
    "read the datahsheet"

    Don't you think if i had found the answer in a data sheet i would not be asking?
     
  7. durable126

    Thread Starter Member

    Feb 20, 2016
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    yes sir I'm talking about the standard header pins found on like a mother board used with like a JST connector.

    And as long as its 300 mA or better I'm ok i just wanted to check
     
  8. blocco a spirale

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    Jun 18, 2008
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    Typical ungrateful TS....... if it's not in the manufacturer's datasheet, unless you run your own tests, where else will you find it?

    No problem finding the current rating here:

    http://uk.rs-online.com/web/p/pcb-headers/2779742/?origin=PSF_435704|acc

    How difficult was that?
     
    Last edited: Mar 26, 2016
  9. tcmtech

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    Nov 4, 2013
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    Typically they will handle more current than their circuit traces can.
     
  10. tracecom

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  11. AnalogKid

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    Aug 1, 2013
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    For 0.025" square pins on 0.100" centers, a safe rule of thumb is 1 A per pin. AMP (now Tyco) MTA series is rated at 3 A per pin, but not if all adjacent pins are carrying the max current. The derating is caused by adjacent circuit heating. Also, since the wire or whatever else that is part of the connection acts as a heatsink, the wire gauge and contact construction affect the rating.

    ak
     
  12. Papabravo

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    Feb 24, 2006
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    Another candidate for the ignore list. I don't have any time left for whiners.
     
  13. ISB123

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    May 21, 2014
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    Actually it is a good answer. I remember the first thing I was taught in school was to read datasheets and how to understand them.
     
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  14. andrewmm

    Active Member

    Feb 25, 2011
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    an impossible to 'answer' question , but here goes.
    Yes most things have a spec , some where, so read a data sheet

    But if its a generic part, good luck finding one of them,,

    Rule of thumb.
    'standard' pin,

    say about an amp DC is reasonable.

    If the pin is being plugged in / un plugged a lot , id de rate to say 1/2 amp.
    other rules of thumb, for power have twice as many grounds as power !

    Having said all that, back on the 80's, did some work on hypertac connectors reliability for a company ,
    for 'a laugh; / limit check we pushed up the current.
    We managed to push almost 100 amps through a pin ratted at 3 amps... !!

    I'd not do that in reality but it was demonstrative ..
     
  15. AnalogKid

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    Aug 1, 2013
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    If you already know all of that, why did you ask the question?
     
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  16. Brevor

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    Apr 9, 2011
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    Think about it, checking the datasheet is the only way to find the answer, we don't have the actual pin in front of us.
     
  17. crutschow

    Expert

    Mar 14, 2008
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    And I suggest you take your crappy attitude and go somewhere else with your questions.
    The data sheet is almost always the first and best place to look (or the data sheet for a similar part).
     
  18. InspectorGadget

    Active Member

    Nov 5, 2010
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    Though it comes off a little flippant, the RTFM answer is important, especially in this case.

    1. It's an imposition on everyone's attention to post on this list with an extremely basic question, which is such a fundamental piece of information that one doesn't even have to go to the datasheet to get it, since it's listed in the basic specs of the part in the (online) catalog entry.

    2. TS then lies about it ("Don't you think if i had found the answer in a data sheet i would not be asking") in order to support further snide remarks.

    3. It's a critically important engineering skill and good habit to check and verify specs in a datasheet rather than capriciously dashing off a question on a cell phone where you don't even bother to proofread a single sentence for spelling and grammar for good communication.

    So keep on flaming the knowledgeable and helpful people in this group. It'll insure that you never really learn anything.
     
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  19. blocco a spirale

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    Jun 18, 2008
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    Well "genius" it obviously is if that is where they will find the answer.

    It is clear from your other posts that "read the datasheet" is a "typical" response to your questions, why do you think that is? Is there something you can learn from this advice?
     
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  20. R!f@@

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    Apr 2, 2009
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    READ THE FRIGGIN' DATA SHEET.
     
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