I want to make a footprint if possible for the following series of zener diodes (1n47xx).
I think Vishay is a good manufacturer. I see that the dimensions of the body (without pins) are 3.3 to 4.1mm, will a 5.08mm package do and should it be cathode up or anode up? Like this:THT_DO-41_SOD81_P5.08mm_Vertical_AnodeUp.

Datahseet:
https://www.vishay.com/docs/85816/1n4728a.pdf

 

You can find the PCB footprint for this part (and many others) at https://componentsearchengine.com

 

I want to undestand it. If I have 4.1mm on the diode body, when the machine bends the wires it shoul be 5.08mm?

 

According to http://www.liteonsemi.com/upfiles/application/LT Application Note-2013.pdf for DO-41 the start of the lead bend should be at least 2mm from the body. Given that the body maximum length is 4.1mm that means (ignoring the radius of the bend) that the leads must be at least 2mm + 4.1mm + 2mm or 8.1mm.

 

Is the radius of the bend ignored normally? And how is this reference sheet called that gives how much should the wires be bended, i dont think its the datasheet?

 

The radius of the bend and the diameter of the component lead should be taken into account. I don't know what radius bend your machine will produce.

The 2mm recommendation is from the application note to which I provided a link. It is not specific to any particular device which is why it is not in the device datasheet.

 

For this and similar sized axial components, 0.40" (10 mm) is the most common footprint for center-to-center lead spacing after bending.

ak

 

If you want to mount the part vertically you should consult manufacturers data sheets and vendor sites to see what spacings are standard and what seem to be popular in terms of cathode orientation. Some assembly houses may do bending for vertical mount but many are going to want the parts bent and taped on reels, ready for insertion.

For DO-41 plastic package mounted horizontally I used 0.5" lead spacing with 0.080" pads with 0.042" holes (12.7, 2, 1 mm, respectively). 0.4" (10 mm) spacing can be used. Glass bodied diodes are somewhat susceptible to breaking due to mechanical stress and longer leads generally are better for reducing stress that comes with thermal cycling.

 

I want it horizontal. I will send it to some manufacturer.