I have these two resistors in my schematic, that i want to find footprints for:
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Body dimensions = 2.5 x 6.8mm AND Leads dimensions = 0.6 x 28mm (like this one: https://www.acdcshop.gr/resistormetalfilmtht2k06w121625x68mm50ppmc-p-28928.html 1)
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Body dimensions = 1.9 x 3.7mm AND Leads dimensions = 0.45 x 28mm (like this one: https://www.acdcshop.gr/resistormetalfilmtht100komega04wplusmn1oslash19x37mm50ppmdeg-p-15162.html)
i understand that the (Body dimensions = 2.5 x 6.8mm) part is useless. The only info left is (Leads dimensions = 0.6 x 28mm).
I opened the datasheet but this info is not clear to me since i can bend the leads wherever i want.
Also, do i care about the diameter of the leads (0.6mm)?
There is no clear P value (in KiCAD's terms) in order to select one.
I opened up the footprint library and there were a ton of THT axial horizontal resistors, but each carried a different prefix like DIN0309, DIN0411 etc. What do these mean and how to select one?
Best Answer
Don't over think it - it's not that hard. This one will do:-
Do you see? Your 2.5 mm x 6.8 mm simply has to fit into the box in the footprint viewer. The one I've selected is 2.5 mm x 6.3 mm which is pretty close and will do as the lead pitch is 10.16 mm. So bend leads to fit. Personally, I tend to go long as my boards are pretty childish, so you could go to the next longer pitch (15.24 mm) which gives you wiggle room.
DIN207 is simply an international standard for common parts so that they're easy to fit into designs. Like TO-3 transistor cases. Decide the lead pitch yourself, but of course it can't be less than the body length or you'll be having to shove it in at an angle/vertically/with hammer.
Tip again. Ideally source your parts first so you have confidence of their sizes. Then design PCB and print it out like below at an exact 1:1 scale. Finally test fit by hand...