It is the first time I am designing a PCB with surface mount components. I am trying to generate footprints for 0805 resistors and capacitors, and 1210 capacitors using the IPC footprint wizard which is built into Altium. The issue is that I am not sure if it is generating the correct foot prints. When I compare the footprint generated, to that given by a component manufacturer, the dimensions can be significantly different.
For example in the case of the 0805 capacitor. https://search.murata.co.jp/Ceramy/image/img/A01X/G101/ENG/GRM21BR61H475KE51-01.pdf
I generate the footprint in Altium using the wizard and it generates pad Dimensions of X = 1.45mm, Y = 1.25mm and Pad spacing of 1.7mm. The spacing between the pads is only 0.45mm (very close). It looks like this:
The datasheet recommends the pads to be X = 1.4mm, Y = 1.65mm, and Pad spacing of 2.6mm. The Pad Spacing parameter is always the most drastically different from datasheets whenever I use the wizard. If I draw the pads according to the datasheet, then it looks this this. The pads are a lot more spaced apart
My question is, can I trust the IPC wizard? Are the foot prints generated by it still ok, even though they are very different than those recommended by manufacturers? I just don't want to spend so much time designing the PCB, only to find out the pads are incorrect after I get the boards made. Sorry, it probably is a question that has a very obvious answer but it is my first time doing this so I don't know what to follow. Your help would be really appreciated.