RAK5146 mechanical dimensions

[fynn]

The RAK5146 datasheet says:

The dimensions of the module fall completely within the PCI Express Mini Card Electromechanical Specification, except for the card’s thickness (5.5 mm at its thickest).

I’m trying planning to integrate this card into a custom design and thinking about available clearances, I’m wondering in what way the card violates the thickness requirements exactly, since there are components on both sides.

The spec gives these available component volumes:

I.e. 1.35mm max below the card PCB and 2.4mm max above. What are the actual heights on the RAK5146 card?

Thanks!

[NeonWraithX (Ethan Caldwell)]

The RAK5146 goes over the 1.35 mm limit on the bottom side due to shielding and components under the PCB. The top side is close to the 2.4 mm spec, likely within range. So if you’re designing a tight slot, watch the clearance underneath — that’s where it breaks the PCIe Mini Card spec.

[fynn]

Thank you, that’s very useful!

I was going to use a TE 1775861-2 (drawing here: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=1775861&DocType=Customer+Drawing&DocLang=English&DocFormat=pdf&PartCntxt=1775861-2), which only has about 1.05mm of clearance below the card, so this probably would have been a problem. I’ll have to use one with a higher stack height then.