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  1. #1
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    What do you call a ceramic SMD cap in a metal frame?

    We have a 100n, 1812, X7R ceramic capacitor which sometimes cracks when the PCB that it sits on is screwed to the heatsink (there is flexion during the screwing as some of the PCBs are slightly bowed). There is no room to move, or even to rotate the capacitor.

    We therefore need a “board flexion capable” version of this capacitor…….these are easy to find on digikey etc. (EG "Flexiterm" etc)

    But as you know, there is another option to mitigate board bending….involving a “lead frame” for the SMD capacitor……you can buy the capacitor installed into such a lead frame….but what is the search term that we must use in digikey in order to find such a “capacitor in a frame”?

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    Re: What do you call a ceramic SMD cap in a metal frame?

    What do you call a ceramic SMD cap in a metal frame?
    That sounds so much like a Christmas cracker joke
    I suppose the answer should be 'prisoner'.

    Seriously, given the additional cost, have you considered fitting it, or at least soldering one end AFTER the board has been secured. Not a technical solution but probably the most pragmatic one, especially if you have any other hand assembly operations.

    Brian
    PLEASE - no friends requests or private emails, I simply don't have time to reply to them all.
    It's better to share your questions and answers on Edaboard so we can all benefit from each others experiences.


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  3. #3
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    Re: What do you call a ceramic SMD cap in a metal frame?

    MLCC with J-leads


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    Re: What do you call a ceramic SMD cap in a metal frame?

    Thanks, is MLCC with J leads less susceptible to cracking under board flexion.?



  5. #5
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    Re: What do you call a ceramic SMD cap in a metal frame?

    That's the idea. Better withstanding mechanical and thermal stress.



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