Thanks … I was trying to think ahead. I like this particular fuse holder from Wurth Elektronik … UL approved, 30A … but I can see the quantity is limited in the USA compared to say Keystone but who’s product is not UL approved and only rated for 5A.
I was just worried in a year or two I might not be able to get the Wurth so I am just making the PCB fit either one.
I was going to do it with a track but didn’t want to forget so I thought I could just put it in now.
You read my mind … Just as you suspected, I am designing for two different holders in case one goes obsolete or I just can’t get it in a year or two. I like the Wurth (UL approved, 30A) rather than the Keystone (not UL and 5A).
I can do it with a track but didn’t want to forget it so thought I would put it in now.
The simplest way is to use pads with the same pad number. If you do this, then KiCad assumes these pads always have to be connected with a track on the PCB, so you can not forget it. It also simplifies the schematic, because there are still just two (different) pin numbers for the schematic.
You can also use “Pad Edit Mode” to add graphic shapes to a pad in the footprint editor. You can add a line to one of the pads to extend it, so it overlaps with another pad.
When you put the footprint in the PCB, there will ba a rastnet between the 2 pads n°1, and another between the 2 pads n°2.
After that you will have to draw the track.
If you forget to draw the track the DRC checking will complain that a track is misisng.
Of course you need to execute the DRC checking at some point. but it always a thing to do before sending you design in porduction anyway.
There is a lot to be learned by exploring Kicad footprints in the Footprint Editor and the PCB Editor. You can see how they are created and the pads numbered, and if you place a fuse on your schematic, link it to a footprint and follow the procedure to have it placed on the PCB, you will see how Kicad deals with connecting tracks.
The below illustration shows at top, a Kicad library fuse and holder footprint. Underneath I modified some pads on a duplicate to show what can easily be achieved with the Pad Editor.
Generally, the simplest method to create footprints is to find a similar footprint in a Kicad Library, “save as” into a Personal Library and then modify that footprint according to the appropriate Date Sheet.
Finally, If you have access to an original PCB, if it lasted 30 years, making similar footprints should see your new PCB last as long without incident also.