I have a supplied pcb footprint of a BNC connector (files attached). In that footprint design, I don't understand (1) why pads are used along with drill holes for the mounting? and (2) how did they calculate the X and Y size(i guess this is the pad surrounding the mounting hole) as 129.92 mils given that the hole size is 79.74mils?
Obviously the mounting clips are intended to be soldered, thus use throughplated holes with surrounding pad, designed as any soldered thoughplated pad. The pad diameter seems reasonable, but can be varied over a wide range.
The footprint editor mask is almost self-explanatory, but you can ask the Altium manual in case of doubt.
Hi,
I thought this was just for mounting purpose and therefore didn't think of plated through hole. I thought(seems I have misunderstood) plated through holes are required only for signal passage(?).
about the pad diameter size(129.92 mils)? how was this size derived? (129.92-79.74)~ 50 mils is the pad angular size used here but how?
Right, pad size isn't discussed in the datasheet. You can conclude that there aren't any specific requirements for the part. So standard pad/hole relations according to your PCB technology apply. Nothing particularly related to BNC connectors.