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Member's Forum Soldering suggestions for a DO-214AB package diode?
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  • State Verified Answer
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  • smc soldering
Related

Soldering suggestions for a DO-214AB package diode?

Andrew J
Andrew J over 4 years ago

I know there are adaptors for a variety of surface mount components to help use them with through-hole boards etc.  This diode package is a little unusual though - e.g:

 

https://www.onsemi.com/pub/Collateral/MBRS340T3-D.PDF

 

(data sheet for a Schottky Diode)

 

I don't have a specific PCB layout to use it on so scratching my head for alternative approaches.  I'm assuming that part of the function of the soldering pads is to act as a heatsink but I'm guessing at that if I'm honest!  Does anyone have any suggestions?

 

Thanks

 

Andrew

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  • dougw
    dougw over 4 years ago +5 suggested
    If you are using protoboard or strip board, you could solder pins or pieces of bare wire into the board, then bend them over to solder to the diode. Another possibility is to solder them to the copper…
  • fmilburn
    fmilburn over 4 years ago in reply to Andrew J +5 suggested
    I use KiCad and this would be a good starter project for it. Out of curiosity I checked to see if it had the SMC footprint built in and it does. In fact, it has a hand solder version which I had a look…
  • fmilburn
    fmilburn over 4 years ago +4 verified
    Hi Andrew, It is a SMC 2-Lead footprint and it would be easy and inexpensive to have an adapter board made by someone like OSH Park (less than $2 with shipping). Are you familiar with any of the PCB design…
  • fmilburn
    0 fmilburn over 4 years ago

    Hi Andrew,

     

    It is a SMC 2-Lead footprint and it would be easy and inexpensive to have an adapter board made by someone like OSH Park (less than $2 with shipping).  Are you familiar with any of the PCB design tools?  If not, this would be an easy project to learn on.

     

    Frank

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  • dougw
    0 dougw over 4 years ago

    If you are using protoboard or strip board, you could solder pins or pieces of bare wire into the board, then bend them over to solder to the diode. Another possibility is to solder them to the copper side of the board.

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  • Andrew J
    0 Andrew J over 4 years ago in reply to fmilburn

    I'll look into that - I've used JLCPCB recently and they've been very good.  I do have KiCad downloaded but not used it yet - I could certainly give it a go.

     

    Thanks

     

    Andrew

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  • Andrew J
    0 Andrew J over 4 years ago in reply to dougw

    Would it be as simple as that Douglas?  I had looked at the bits of prototyping board I have and thought there might be a solution bridging a few pads together with solder (or, no, a wire as you suggest.) It would be easy enough to add some male headers as well. The pads aren't used for heatsink purposes? 

     

    Thanks

     

    Andrew

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  • shabaz
    0 shabaz over 4 years ago

    Hi Andrew,

     

    Sometimes I'll use the underside of stripboard, like this:

    image

    Also, adhesive copper tape is not bad, although it's not ideal for permanent projects. The photo below shows some inductors, but also  some small diodes.

    image

    I once saw a large project, spanning tables : ) using SMD prototyping : )  It was a radio transceiver, and with it spread out quality would have been bad, but it allowed many tests/experiments prior to the first PCB being made.

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  • Andrew J
    0 Andrew J over 4 years ago in reply to shabaz

    Interesting - it's not far off what I thought with bridging the copper through-hole pads on the boards I have.  I'm going to have a look at Kicad and see about learning to produce some simple PCBs; I can use this and Douglas's idea for testing/prototyping as I go.

     

    I seem to have multiple answers here to accept - can I do that?

     

    Thanks,

     

    Andrew

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  • dougw
    0 dougw over 4 years ago in reply to Andrew J

    Heatsinking considerations would come into play if the power dissipation got above about 0.4 watts. On a normal silicon diode this would be about 0.6 Amps.

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  • fmilburn
    0 fmilburn over 4 years ago in reply to Andrew J

    I use KiCad and this would be a good starter project for it.  Out of curiosity I checked to see if it had the SMC footprint built in and it does.  In fact, it has a hand solder version which I had a look at.  There is a via through the footprint to a pad on the other side in their hand solder version which is interesting.  It would be easy to solder.  I encourage you to try building it yourself but let us know if you would like suggestions or feedback.

    image

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  • fmilburn
    0 fmilburn over 4 years ago in reply to Andrew J

    It doesn't matter which one you accept image

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  • Andrew J
    0 Andrew J over 4 years ago in reply to fmilburn

    I’m going to start on that today!

     

    Thanks everyone.

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