https://devzone.nordicsemi.com/f/nordic-q-a/128848/nrf52840-ckaa-wlcsp-altium-footprint-not-centeredHello, I have just downloaded the NRF52840 Reference Altium Library. I have noticed that the step file for the component is not symmetrical about the origin. If I measure from pin A10 to the top, I get 0.269mm. From pin K10 to the bottom, I geten-USTelligent Community 13Fri, 31 Jul 2026 14:14:13 GMThttps://devzone.nordicsemi.com/thread/569747?ContentTypeID=1Fri, 31 Jul 2026 14:14:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c957dee1-4ff0-4702-bce3-a934f02f6e14Ressa<p>Hi,<br /><br />Your impression is correct, I could also check it on Altium reference design files . Regarding the package drawing, the distance from edge to ball is not presented . So it does not necessarily reject the observation you had. The total package dimension also gives similar impression, E is slightly bigger than D.&nbsp;<br /><br /><br /><br /><br /><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1785507023236v1.png" alt=" " /><br /><br /><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1785507183608v2.png" alt=" " />&nbsp; &nbsp; &nbsp; &nbsp;<img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1785507213537v4.png" alt=" " /><br /><br /><br /><br /><br /><br /><br />Br,<br />Ressa</p><div style="clear:both;"></div>