Weird pushbutton footprint

[T3sl4co1l]

http://spec_sheets.e-switch.com/specs/P010337.pdf

Why the heck did they put those spurs on it?  Just make a standard gull-wing pattern with enough soldering area for everthing...

On the upside, it's very low profile, and very available right now.  Seems like a reasonable part otherwise.

Tim

[thm_w]

For additional strength maybe, pads could tear? But they are so narrow I'm not sure how much it would help.

If you are using a lot, its cheaper to tape the dome onto the PCB, but for low volume/cost non issue stuff it seems like a good equivalent.

[floobydust]

The spurs seem silly, 0.2mm is not going to pull the part centered with surface tension or add more solder paste.

I had bad luck with e-switch samples, I found their plastics can't take heat and they seem to sag after reflow and the spring force plummets. Ends up to be a soft mushy click and I think that brown plastic resin deforms easily. It was a really odd experience; I didn't spec them for production.